Fixing Kyocera ECOSYS P4060dn Printer Error Codes in details

Fixing Kyocera ECOSYS P4060dn Printer Error Codes in details

– Printer model: Kyocera ECOSYS P4060dn
– Fix Error codes on Kyocera ECOSYS P4060dn model and its description:

• Code: C0060
• Description: Type mismatch error
• Causes: Install the SSD for different model. Or, it is not possible to communicate with some units.
• Remedy: 1 Checking the SSD Installed SSD containing firmware which is not for the applicable model. Install SSD containing firmware which is for the applicable model.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Reconnect the connector which connect to the below unit. If there is no continuity, replace the wire. – Drum unit – Developer unit – Primary transfer unit – Fuser unit

• Code: C0100
• Description: Backup memory device error
• Causes: An abnormal status is output from the flash memory.
• Remedy: 1 Resetting the main power The flash memory does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the main PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the main PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace them. If not resolved, replace the main PWB.

• Code: C0120
• Description: MAC address data error
• Causes: The MAC address data is incorrect.
• Remedy: 1 Resetting the main power The flash memory does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the MAC address The MAC address is incorrect. Replace the main PWB when the MAC address is not indicated on the network status page.

• Code: C0130
• Description: Backup memory reading/writing error
• Causes: The reading or writing into the flash memory is unavailable.
• Remedy: 1 Resetting the main power The flash memory does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the main PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the main PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace them. If not resolved, replace the main PWB.

• Code: C0150
• Description: Engine EEPROM reading / writing error
• Causes: 1. Five times consecutive detection of no response from the device for more than 5ms on reading / writing.
  2. Data read in 2 places does not match 8 consecutive times.
  3. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Resetting the main power The EEPROM on the engine PWB does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the EEPROM on the engine PWB The EEPROM is not properly attached. Reattach the EEPROM on the engine PWB.
  3 Checking the EEPROM on the engine PWB The EEPROM is faulty. Replace the EEPROM on the engine PWB and execute U169. Then, compare to previously output U000 maintenance report, re-enter the setting value for U053, U100, U101, U106, U140, U161, U464, U252, U034, and execute the maintenance mode in following order. U119 > U469[Manual] > U140[AC Calib] > U464[Calib] > U155[Calibration] (prepare the empty waste toner box)
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C0160
• Description: EEPROM data error
• Causes: The data read from the EEPROM is judged as abnormal.
• Remedy: 1 Resetting the main power The EEPROM on the engine PWB does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Executing U021 The storage data in the EEPROM on the engine PWB is faulty. Execute U021.
  3 Replacing the EEPROM The EEPROM is faulty. Replace the EEPROM on the engine PWB and execute U169. Then, compare to previously output U000 maintenance report, re-enter the setting value for U053, U100, U101, U106, U140, U161, U464, U252, U034, and execute the maintenance mode in following order. U119 > U469[Manual] > U140[AC Calib] > U464[Calib] > U155[Calibration] (prepare the empty waste toner box)

• Code: C0170
• Description: Charger count error
• Causes: The values in one of the billing counters or the life counter mismatch between the main side and the engine side.
• Remedy: 1 Checking the machine serial No. of the main PWB The main PWB for the different main unit is installed. Check the machine serial Nos of MAIN and ENGINE at U004, and install the correct main PWB if the MAIN No. differs. Note: Be sure not to execute U004 if the machine serial No. differs from the machine serial No. indicated on the main unit to prevent the different machine serial No. from overwritten. (Dontselect[Execute]andpressth e[Start]key.)’
  2 Checking the machine serial No. in the EEPROM on the engine PWB The EEPROM for the different main unit is installed. Check the machine serial Nos of MAIN and ENGINE at U004, and install the correct EEPROM on the engine PWB if the ENGINE machine serial No. differs.
  3 Checking the main PWB The main PWB is faulty. When the MAIN machine serial No. differs at U004, replace the main PWB and execute U004.
  4 Checking the EEPROM on the engine PWB The EEPROM is faulty. When the machine serial No. in the engine PWB differs at U004, reattach the EEPROM on the engine PWB. If not repaired, replace the EEPROM and execute U169.Then, compare to previously output U000 maintenance report, re-enter the setting value for U053, U100, U101, U106, U140, U161, U464, U252, U034, and execute the maintenance mode in following order. U119 > U469[Manual] > U140[AC Calib] > U464[Calib] > U155[Calibration] (prepare the empty waste toner box)
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C0180
• Description: Machine serial number mismatch
• Causes: The machine serial Nos. in the main PWB and the EEPROM on the engine PWB mismatch when turning the power on.
• Remedy: 1 Checking the machine serial No. of the main PWB The main PWB for the different main unit is installed. Check the machine serial Nos of MAIN and ENGINE at U004, and install the correct main PWB if the MAIN No. differs. Note: Be sure not to execute U004 if the machine serial No. differs from the machine serial No. indicated on the main unit to prevent the different machine serial No. from overwritten. (Dontselect[Execute]andpressth e[Start]key.)’
  2 Checking the machine serial No. in the EEPROM on the engine PWB The EEPROM for the different main unit is installed. Check the machine serial Nos of MAIN and ENGINE at U004, and install the correct EEPROM on the engine PWB if the ENGINE machine serial No. differs.
  3 Replacing the main PWB The main PWB is faulty. When the MAIN machine serial No. differs at U004, replace the main PWB and execute U004.
  4 Checking the EEPROM on the engine PWB The EEPROM is faulty. When the machine serial No. in the engine PWB differs at U004, reattach the EEPROM on the engine PWB. If not repaired, replace the EEPROM and execute U169.Then, compare to previously output U000 maintenance report, re-enter the setting value for U053, U100, U101, U106, U140, U161, U464, U252, U034, and execute the maintenance mode in following order. U119 > U469[Manual] > U140[AC Calib] > U464[Calib] > U155[Calibration] (prepare the empty waste toner box)
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C0350
• Description: Panel PWB communication error (Electronic volume I2C communication error)
• Causes: Since NACK was received during the I2C communication, the retry was repeated 5 times and the initial command was transmitted, and then the retry was repeated 5 times again. After that, NACK was also received.
• Remedy: 1 Resetting the main power The operation of the operation panel main PWB is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Operation panel main PWB – Main PWB
  3 Replacing the operation panel main PWB The operation panel main PWB is faulty. Replace the panel main PWB.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0361
• Description: Communication error between the engine CPU and the feed ASIC
• Causes: The communication with the feed ASIC failed 10 times continuously.
• Remedy: 1 Resetting the main power The engine PWB does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Feed drive PWB – Engine PWB
  4 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C0362
• Description: Communication error between the engine CPU and the feed ASIC
• Causes: The communication with the feed ASIC failed 10 times continuously.
• Remedy: 1 Resetting the main power The engine PWB does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Feed image PWB – Engine PWB
  4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C0640
• Description: Hard Disk error
• Causes: The HDD cannot be accessed properly.
• Remedy: 1 Releasing the partial operation The partial operation is executed. Execute resetting the partial operation at U906.
  2 (When abnormal sounds occur) Replacing the HDD The HDD is faulty. Replace the HDD when the abnormal sounds are from the HDD.
  3 Checking the connection The connector is not connected properly. The SATA cable or the wire is faulty. Reconnect the below SATA cable and connector of the wire. If there is no continuity, replace SATA cable or the wire. – HDD – main PWB
  4 Initializing the HDD The HDD storage data is faulty. Execute U024 [FULL] (HDD Format).
  5 Replacing the HDD The HDD is faulty. Replace the HDD.
  6 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0660
• Description: Hard Disk encryption key error
• Causes: 1. The encrypted password entered when replacing the main PWB is not correct.
  2. Install SSD which is used in the other machine.
• Remedy: 1 (When the issue occurs after replacing the main PWB) Executing U004 The encryption key after replacing the main PWB is faulty. Execute U004 when this issue occurs after replacing the main PWB.
  2 Replacing the HDD (abnormal sounds) The HDD is faulty. Replace the HDD when the abnormal sounds are from the HDD.
  3 Checking the connection The connector is not connected properly. The SATA cable or the wire is faulty. Reconnect the below SATA cable and connector of the wire. If there is no continuity, replace SATA cable or the wire. – HDD – main PWB
  4 Initializing the HDD The HDD storage data is faulty. Execute U024 [FULL] (HDD Format).
  5 Replacing the HDD The HDD is faulty. Replace the HDD.
  6 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0670
• Description: Hard Disk overwriting error
• Causes: The area that cannot be properly overwritten exists in a part of the HDD.
• Remedy: 1 Replacing the HDD (abnormal sounds) The HDD is faulty. Replace the HDD when the abnormal sounds are from the HDD.
  2 Checking the connection The connector is not connected properly. The SATA cable or the wire is faulty. Reconnect the below SATA cable and connector of the wire. If there is no continuity, replace SATA cable or the wire. – HDD – main PWB
  3 Initializing the HDD The HDD storage data is faulty. Execute U024 [FULL] (HDD Format).
  4 Replacing the HDD The HDD is faulty. Replace the HDD.
  5 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0680
• Description: SSD error
• Causes: The SSD cannot be accessed, or the error occurs when accessing to the SSD.
• Remedy: 1 Checking the SSD (if lit after replacing the SSD) An SSD out of specification is installed. Install the SSD matching the memory capacity specification.
  2 Resetting the main power The SSD is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  3 Reinstalling the SSD The connection with the main PWB is faulty. Reinstall the SSD on the main PWB.
  4 Initializing the SSD The data stored in the SSD is faulty. Retrieve the SSD storage data at U026, and then initialize the SSD at U024.
  5 Replacing the SSD The SSD is faulty. Retrieve the SSD storage data at U026, and then replace the SSD.
  6 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0800
• Description: Image processing error
• Causes: The print sequence jam (J010x) was detected 2 times continuously.
• Remedy: 1 Checking the image data The image data is faulty. When this issue occurs only when handling the certain image data, check if the image data is faulty.
  2 Checking the situation The printing operation of the certain file is faulty. Acquire the jobslogifthephenomenoncanbere producedbyspecifyingthejobwhe ntheerrorwasdetected.’
  3 Checking the main PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the main PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace them. If not resolved, replace the main PWB.

• Code: C0840
• Description: RTC error (‘Time for maintenance T’ appears)
• Causes: Check at the start up
• Remedy: 1 Executing U906 The backup battery on the main PWB is faulty, and so, the RTC settings are erased after unplugging the power cord. Execute U906 and reset the display [Maintenance T]. After that, set the date and time (RTC) through System menu. (It is necessary to perform this process every time when unplug/ plug the power cord.)
  2 Replacing the main PWB The main PWB is faulty, or the backup battery runs out. The user call regarding C0840 is frequent even if performing the previous treatment, replace the main PWB.

• Code: C0980
• Description: 24V power interruption detection
• Causes: 1. Detected 24 V power off signal for 1s continuously.
  2. Another service call occurred when passing 100ms after detecting 24V power failure detection signal, and then 24 power supply was recovered.
• Remedy: 1 Resetting the main power The printing process is not properly executed. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Low voltage PWB – Engine PWB
  3 Replacing the low voltage PWB The low voltage PWB is faulty. When the +24V generation from the low voltage PWB is not stable, and it lowers, replace the low voltage PWB.
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1000
• Description: MP lift motor error
• Causes: 1. When the MP lift motor rotates in the descending direction, the MP position sensor does not turn on within 1850ms.
  2. When the MP lift motor rotates in the ascending direction, the MP position sensor does not turn off within 1600ms.
• Remedy: 1 Checking the MP lift plate The MP lift plate does not operate properly. Repair or replace the MP lift plate on the MP tray when it does not move vertically.
  2 Checking the lift lever The lift lever is not properly attached. Check if the lift lever is vertically shifted by the lift motor cam, or if it has the excessive load. Then, reattach the MP tray. Then, replace the MP tray if it is not fixed.
  3 Checking the drive gear The drive gear to lift up the MP lift plate does not rotate properly. Check if the MP lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Main unit – Paper conveying unit . MP position sensor – Relay connector – Feed drive PWB . Feed drive PWB – Engine PWB
  5 Replacing the MP lift motor The MP lift motor does not operate properly. Replace the MP lift motor.
  6 Checking the MP position sensor The MP position sensor is not attached properly. Reattach MP position sensor.
  7 Replacing the MP position sensor The MP position sensor is faulty. Replace MP position sensor.
  8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  9 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  10 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1010
• Description: Lift motor 1 error
• Causes: Five times consecutive detection of any one of the below condition.
  1. Lift upper limit sensor 1 does not detect on even 16s passed after inserting cassette 1.
  2. After turning on lift motor 1, lock signal does not release for 300ms.
  3. After detecting lift upper limit sensor 1 OFF during printing, lift upper limit sensor 1 does not turn on even passing 1s from ascending control.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. Repair or replace the lift plate when it does not move vertically.
  2 Checking the drive gear The drive gear to lift up the lift plate does not rotate properly. Check if the lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Lift motor 1 – Feed drive PWB . Feed drive PWB – Engine PWB
  4 Checking lift motor 1 Lift motor 1 is faulty. Check the operation of lift motor 1, and replace it if necessary.
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Lift upper limit sensor 1 – Feed drive PWB . Feed drive PWB – Engine PWB
  6 Checking lift sensor 1 Lift upper limit sensor 1 is not properly attached, or it is faulty. Reattach lift upper limit sensor 1. Replace it if it is not fixed.
  7 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  8 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1020
• Description: Lift motor 2 error
• Causes: Five times consecutive detection of any one of the below condition.
  1. Lift upper limit sensor 2 does not detect on even 16s passed after inserting cassette 2.
  2. After turning on lift motor 2, lock signal does not release for 300ms.
  3. After detecting lift upper limit sensor 2 OFF during printing, lift upper limit sensor 2 does not turn on even passing 1s from ascending control.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. Repair or replace the lift plate when it does not move vertically.
  2 Checking the drive gear The drive gear to lift up the lift plate does not rotate properly. Check if the lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Lift motor 2 – Feed drive PWB . Feed drive PWB – Engine PWB
  4 Checking lift motor 2 Lift motor 2 is faulty. Check the operation of lift motor 2, and replace it if necessary.
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Lift upper limit sensor 2 – Feed drive PWB . Feed drive PWB – Engine PWB
  6 Checking lift sensor 2 Lift upper limit sensor 2 is not properly attached, or it is faulty. Reattach lift upper limit sensor 2. Then, replace it if it is not fixed.
  7 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  8 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1030
• Description: PF lift motor 1 error (Paper Feeder)
  Object: Paper feeder or Large capacity feeder
• Causes: [PF-7100 (Paper Feeder)]
  1. PF lift upper limit sensor 1 does not turn on after passing 16s since cassette 3 was inserted.
  2. The lock-up signal is not released for 300ms after turning on of PF lift motor 1.
  3. Since PF lift sensor 1 turned off during printing, PF lift upper limit sensor 1 does not turn on after passing 1s from the ascend control.
  [PF-7110 (Large Capacity Feeder)]
  1. PF lift upper limit sensor 1 does not turn on after passing 24s since cassette 3 was inserted.
  2. PF lift upper limit sensor 1 does not turn on after passing 3s from the ascend control when starting printing.
• Remedy: 1 Checking the PF lift plate The PF lift plate does not operate properly. Repair or replace the PF lift plate when it does not move vertically.
  2 Checking the drive gear The drive gear to lift up the PF lift plate does not rotate properly. Check if the PF lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift motor 1 – PF PWB
  4 Checking PF lift motor 1 PF lift motor 1 is faulty. Replace PF lift motor 1.
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift upper limit sensor 1 – PF PWB
  6 Checking PF lift sensor 1 PF lift upper limit sensor 1 is not properly attached, or it is faulty. Reattach PF lift upper limit sensor 1. Then, replace it if it is not fixed.
  7 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.

• Code: C1040
• Description: PF lift motor 2 error (Paper Feeder)
  Object: Paper feeder or Large capacity feeder
• Causes: [PF-7100 (Paper Feeder)]
  1. PF lift upper limit sensor 2 does not turn on after passing 16s since cassette 4 is inserted.
  2. The lock-up signal is not released for 300ms after turning on of PF lift motor 2.
  3. Since PF lift sensor 2 turned off during printing, PF lift upper limit sensor 2 does not turn on after passing 1s from the ascend control.
  [PF-7110 (Large Capacity Feeder)]
  1. PF lift upper limit sensor 2 does not turn on after passing 24s since cassette 4 is inserted.
  2. PF lift upper limit sensor 2 does not turn on after passing 3s from the ascend control when starting printing.
• Remedy: 1 Checking the PF lift plate The PF lift plate does not operate properly. Repair or replace the PF lift plate when it does not move vertically.
  2 Checking the drive gear The drive gear to lift up the PF lift plate does not rotate properly. Check if the PF lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift motor 2 – PF PWB
  4 Replacing PF lift motor 2 PF lift motor 2 is faulty. Replace PF lift motor 2.
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift upper limit sensor 2 – PF PWB
  6 Checking PF lift sensor 2 PF lift upper limit sensor 2 is not properly attached, or it is faulty. Reattach PF lift upper limit sensor 2. Then, replace it if it is not fixed.
  7 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.

• Code: C1140
• Description: PF lift motor error (Side deck)
  Object: Side deck
• Causes: 1. The PF lift upper limit sensor does not turn on even 30s passed after inserting the cassette5.
  2. The lock signal is detected for 200ms continuously during the operation of PF lift motor.
  3. When start printing, PF lift upper limit sensor does not detect on even passing 2s from ascending control.
• Remedy: 1 Checking the PF lift plate The PF lift plate does not operate properly. Repair or replace the PF lift plate when it does not move vertically.
  2 Checking the drive gear The drive gear to lift up the PF lift plate does not rotate properly. Check if the PF lift plate lift-up drive gears rotate smoothly or have no excessive load. And apply the grease (EM-50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift motor – PF PWB
  4 Checking the PF lift motor The PF lift motor is faulty. Replace the PF lift motor.
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF lift upper limit sensor – PF PWB
  6 Checking the PF lift upper limit sensor The PF lift upper limit sensor is not properly attached, or it is faulty. Reattach the PF lift upper limit sensor. Then, replace it if it is not fixed.
  7 Checking the PF PWB The PF PWB is faulty. Replace the PF PWB.

– Kyocera ECOSYS P4060dn printer Error Codes and quick guide to troubleshooting:

• Code: C1800
• Description: Paper Feeder communication error
  Object: Paper feeder or Large capacity feeder
• Causes: 1. Communication error was detected 10 times continuously.
  2. The ready signal is not notified from the paper feeder or the large capacity feeder within 6s after communication starts.
• Remedy: 1 Checking the connection The cable is not properly connected to the main unit. Reconnect the cable into the main unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF PWB – Engine PWB
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1820
• Description: Side deck communication error
  Object: Side deck
• Causes: 1. Communication error was detected 10 times continuously.
  2. The ready signal is not notified from the side deck within 6s after communication starts.
• Remedy: 1 Checking the connection It is not properly connected to the main unit. Reconnect to the main unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF PWB – PF PWB (Side deck)
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the PF PWB (side deck) The PF PWB (in the side deck) is faulty. Replace PF PWB (Side deck).
  5 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1900
• Description: Paper Feeder EEPROM error
  Object: Paper feeder or Large capacity feeder For internal count
• Causes: The writing data and the reading data mismatch 3 times continuously when writing.
• Remedy: 1 Reconnecting the paper feeder It is not properly connected to the main unit. Reinstall the paper feeder to the main unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Reconnect the connector of the wire between the engine PWB and the PF PWB. If the wire is faulty, repair or replace it. If not resolved, replace the PF PWB.
  3 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1920
• Description: Side deck EEPROM error
  Object: Side deck For internal count
• Causes: The writing data and the reading data mismatch 3 times continuously when writing.
• Remedy: 1 Reconnecting the side deck It is not properly connected to the main unit. Reinstall the side deck to the main unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Reconnect the connector of the wire between the engine PWB and the PF PWB (side deck). If the wire is faulty, repair or replace it. If not resolved, replace the PF PWB.
  3 Replacing the PF PWB The PF PWB is faulty. Replace PF PWB (Side deck).
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1950
• Description: Primary transfer unit EEPROM error
• Causes: 1. Five times consecutive detection of no response from the device for more than 5ms on reading / writing.
  2. Data read in 2 places does not match 8 consecutive times.
  3. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Primary transfer unit – Transfer PWB . Transfer PWB – Feed image PWB . Feed image PWB – Engine PWB
  3 Primary transfer unit replacement The primary transfer unit is faulty. Replace the primary transfer unit.
  4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2102
• Description: Developer motor CY error
• Causes: 1. After the developer motor CY drive starts, the ready signal does not reach to L level even passing 2s.
  2. After the developer motor CY stabilizes, the ready signal shows H level for 2s continuously.
• Remedy: 1 Checking the developer drive section The developer drive section is faulty. Replace the developer unit drive gear if it is faulty.
  2 Checking the developer roller The developer roller is faulty. Check if the developer roller rotates, and replace the developer unit if not rotating.
  3 Checking the drive parts The drive from the developer motor is not transmitted properly. Execute U030 [DLP(CMY)] to check the developer motor CY operation. Check if the drive gears rotate and have no excessive load, and apply the grease (EM-LP, Part no: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Developer motor CY – Feed image PWB . Feed image PWB – Engine PWB
  5 Checking the developer motor The developer motor is faulty. Reattach developer motor CY. If not repaired, replace it.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2103
• Description: Developer motor M error
• Causes: 1. After the developer motor M drive start, the ready signal does not reach to L level even passing 2s.
  2. After the developer motor M stabilize, the ready signal shows H level for 2s continuously.
• Remedy: 1 Checking the developer drive section The developer drive section is faulty. Replace the developer unit drive gear if it is faulty.
  2 Checking the developer roller The developer roller is faulty. Check if the developer roller rotates, and replace the developer unit if not rotating.
  3 Checking the drive parts The drive from the developer motor is not transmitted properly. Execute U030 [DLP(CMY)] to check the developer motor M operation or the developer motor M operation. Check if the drive gears rotate and have no excessive load, and apply the grease (EM-LP, Part no: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Developer motor M – Feed image PWB . Feed image PWB – Engine PWB
  5 Checking the developer motor The developer motor is faulty. Reattach developer motor M. If not repaired, replace them.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2201
• Description: Drum motor K steady-state error
• Causes: The ready signal is at the H level for 2s continuously after drum motor K becomes stable.
• Remedy: 1 Checking drum motor K The drum motor K drive is faulty. Execute U030 [Drum K] to check the drum motor K operation. Check if the drive gears rotate and have no excessive load, and apply the grease (EM-LP, Part no: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum motor K – Feed image PWB . Feed image PWB – Engine PWB
  3 Checking drum unit K The drum unit is faulty. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated.
  4 Checking drum motor K Drum motor K is faulty. Replace drum motor K.
  5 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2300
• Description: Fuser motor error
• Causes: The ready signal is at the H level for 1.5s continuously during the fuser motor drive.
• Remedy: 1 Checking the fuser motor The fuser motor operation is faulty. Execute U030 [Fuser] to check the fuser motor operation. Check if the drive gears rotate and have no excessive load, and apply the grease (EM-LP, Part no: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser motor – Feed drive PWB . Feed drive PWB – Engine PWB
  3 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit.
  4 Replacing the fuser drive unit The fuser drive unit is faulty. Replace the fuser drive unit.
  5 Replacing the fuser motor The fuser motor is faulty. Replace the fuser motor.
  6 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2500
• Description: Feed motor error
• Causes: The ready signal is not at the L level after passing 2s since the feed motor drive was started.
• Remedy: 1 Checking the feed motor The operation of the feed motor is faulty. Execute U030 [Feed] to check the feed motor operation. Check if the drive gears rotate and have no excessive load, and apply the grease (EM-LP, Part no: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Feed motor – Feed drive PWB . Feed drive PWB – Engine PWB
  3 Replacing the feed motor The feed motor is faulty. Replace the feed motor.
  4 Replacing the feed drive unit The feed drive unit is faulty. Replace feed drive unit.
  5 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  6 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  8 Replacing the feed image PWB The power cantbesuppliedtothefeeddrive PWB.’ Replace the feed image PWB.

• Code: C2600
• Description: PF feed motor error
• Causes: The ready signal is not at the L level (stable rotation) after passing 1s since the PF feed motor drive started.
• Remedy: 1 Checking the PF feed motor The PF feed motor is not properly connected, or it is faulty. Execute U247 [2PF] or [LCF] > [Motor On] to check the paper feed operation. If the PF feed motor does not operate properly, reconnect the connector of the motor. Check if the PF feed roller and the drive gears rotate smoothly and have no excessive load, apply the grease (EM- 50LP, Part no.: 7BG010009H) to the sliding section and repair the related parts so that they can rotate smoothly.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PF feed motor – PF PWB . PF PWB – Engine PWB (Drawer connector between the paper feeder and the main unit)
  3 Replacing the PF feed motor The PF feed motor is faulty. Replace the PF feed motor.
  4 Firmware upgrade The engine firmware or the PF firmware is faulty. Upgrade the engine firmware and the PF firmware to the latest version.
  5 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2700
• Description: Primary / secondary transfer release error
• Causes: The belt release motor was pressed or drove to the releasing direction, and releasing or pressing condition continued for 2.3s
• Remedy: 1 Checking the drive parts The drive transmission of the belt release motor is faulty. Execute U030 [Belt Lift]. If the motor drive is not transmitted, repair the drive transmission parts.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Belt release motor – Feed image PWB . Belt release sensor – Feed image PWB . Feed image PWB – Engine PWB . Feed image PWB – Low voltage PWB
  3 Checking the belt release sensor The belt release sensor comes off. Reattach or replace the belt release sensor.
  4 Checking the belt release motor The belt release motor is not operated correctly. Reattach or replace the belt release motor.
  5 Primary transfer unit replacement The primary transfer roller liftup drive section is faulty. Replace the primary transfer unit.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  9 Replacing the low voltage PWB The power is not supplied from the low voltage PWB to the belt release motor. If the power is not supplied from the low voltage PWB, replace the low voltage PWB.

• Code: C2760
• Description: Developer K/Transfer belt motor startup error
• Causes: 1. FG pulse of the motor does not enter for 2s continuously during driving the motor.
  2. FG pulse exceeding 4000rpm was detected 10 times continuously. 3. The condition where the target speed +/-6.25% of the motor deviated continued for 2s.
• Remedy: 1 Primary transfer unit replacement The transfer belt is faulty. Replace the primary transfer unit.
  2 Checking the developer K/ transfer belt motor drive transmission section The drive transmission of the developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the excessive load is not applied to the drive gears, roller and the belt by rotating them. After that, clean the drive section of the primary transfer unit.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Developer K/Transfer belt motor – Feed image PWB . Feed image PWB – Engine PWB
  4 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Reattach the developer K/ transfer belt motor and reconnect the connector. If not repaired, replace it.
  5 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2810
• Description: Waste toner motor error
• Causes: 1. The lock detection signal shows L level during driving the waste toner motor. (0.5s x 3 times retry continuously with 2ms cycle)
  2. Low level of the lock detection signal can not detect within 50ms from the switching REM signal L to H. (3 times retry with 50ms cycle)
• Remedy: 1 Checking the waste toner box The waste toner box is not properly installed. Reinstall the waste toner box.
  2 Checking the waste toner motor The waste toner motor does not operate properly. Execute U030 [Toner Recovery] to check whether the waste toner motor operation has an excessive load or not. Then, repair it if necessary.
  3 Checking the drive gear The drive gear does not rotate properly. Check if the excessive load is not applied to the drive gears by rotating the gears, and clean the drive gears and the bushing, etc.
  4 Replacing the waste toner box The waste toner box is faulty. Replace the waste toner box.
  5 Checking the waste toner motor The waste toner motor is not properly connected. Reinsert the connector into the waste toner motor.
  6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Waste toner motor – Engine PWB
  7 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2840
• Description: Belt cleaning motor error
• Causes: 1. FG pulse of the motor does not enter for 2s continuously during driving the motor.
  2. FG pulse exceeding 4000rpm was detected 10 times continuously.
  3. The condition where the target speed +/-6.25% of the motor deviated continued for 2s.
• Remedy: 1 Checking the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit.
  2 Cleaning the primary transfer cleaning section The roller in the primary transfer cleaning section does not rotate properly. Remove the waste toner remaining in the primary transfer cleaning section.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Belt cleaning motor – Transfer PWB . Transfer PWB – Transfer connect PWB . Transfer connect PWB – Feed image PWB . Feed image PWB – Feed drive PWB . Feed image PWB – Engine PWB
  4 Checking the belt cleaning motor The belt cleaning motor does not operate properly. Reattach the belt cleaning motor. If not repaired, replace it.
  5 Primary transfer unit replacement The cleaning drive section of the primary transfer unit is faulty. Transfer PWB or transfer connection PWB is faulty. Replace the primary transfer unit.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.

• Code: C4001
• Description: Polygon motor synchronization error
• Causes: The ready signal is not at the L level after passing 15s since the polygon motor drive was started.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 Checking the polygon motor The polygon motor does not rotate properly. Check the rotation sound of the polygon motor, and reattach or replace the LSU if it does not rotate properly.
  3 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4011
• Description: Polygon motor steady-state error
• Causes: The ready signal is at the H level for 15s continuously after the polygon motor drive becomes stable.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 Checking the polygon motor The polygon motor does not rotate properly. Check the rotation sound of the polygon motor, and reattach or replace the LSU if it does not rotate properly.
  3 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4101
• Description: BD initialization error
• Causes: The BD signal was not detected for 1s after driving the polygon motor.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 Checking the LSU The BD sensor or the laser diode is faulty. Reinstall or replace the LSU while paying attention to the static electricity.
  3 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4201
• Description: BD steady-state error
• Causes: The BD signal is not detected during the laser lighting.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 Checking the LSU The BD sensor or the laser diode is faulty. Reinstall or replace the LSU while paying attention to the static electricity.
  3 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4600
• Description: LSU cleaning motor error
• Causes: The LSU cleaning motor lock-up was detected, or the motor continued to be shifted in the same direction for 8s or more.
• Remedy: 1 Executing the Laser Scanner Cleaning The LSU cleaning drive gear and the cleaning pad have the load and so they are not shifted smoothly. Execute Laser Scanner Cleaning.
  2 Cleaning the LSU cleaning drive gear and the cleaning pad The LSU cleaning drive gear and the cleaning pad have the load and so they are not shifted smoothly. Clean the LSU cleaning drive gear and the cleaning pad.
  3 LSU replacement The LSU cleaning drive gear, cleaning wire or the cleaning pad are deformed, or they are faulty. Replace the LSU.
  4 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Clean the following wire connector terminal and FFC terminal, then reconnect the connector and the FFC. If the wire or FFC is faulty, replace them. LSU cleaning motor – APC PWB (LSU) . APC PWB (LSU) – Engine PWB
  5 Checking the LSU cleaning motor The LSU cleaning motor is not properly attached, or it is faulty. Reattach the LSU cleaning motor and reconnect the connector. If not repaired, replace it.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4701
• Description: VIDEO ASIC device error 1
• Causes: Communication with VIDEO ASIC has fails 10 times continuously. (After writing to VIDEO ASIC, read from same address and the error occurred that the value does not match)
• Remedy: 1 Resetting the main power The ASIC operation on the engine is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the main firmware and the engine firmware to the latest version.
  3 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4801
• Description: LSU type mismatch error
• Causes: The LSU mismatches with the main unit.
• Remedy: 1 Checking the LSU The different type LSU is installed. Install the correct LSU.
  2 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  3 LSU replacement The APC PWB is faulty. Replace the LSU.

• Code: C5101
• Description: Main high voltage error K
• Causes: 1. The flowing current when Vpp is varied in three stages during Vpp adjustment is measured and the difference between the zero current value and the current value in the second step is equal to or less than the reference value.
  2. Even if Vpp [C] is applied, the detected Idc is too small. (Less than 5uA)
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB.
  2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated.
  3 Replacing drum motor K Drum motor K is faulty. Replace drum motor K.
  4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Main high voltage PWB – Engine PWB
  7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB.
  8 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C5104
• Description: Main high-voltage error Y
• Causes: When measuring the inflow electric current changing Vpp to 3 steps during the Vpp adjustment, the gap between the 0 electric current value and the 2nd electric current value is the standard value or less.
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB.
  2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated.
  3 Checking drum motor CMY Drum motor CMY does not rotate properly due to the excessive load. Replace drum motor CMY.
  4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Main high voltage PWB – Engine PWB
  7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB.
  8 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C5131
• Description: Primary transfer high-voltage error K
• Causes: When adjusting the feedback, the detected electric current value exceeds the upper limit or is less than the lower limit, or the adjustment result is 300V or less or is 2,900V or more.
• Remedy: 1 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the developer K/transfer belt motor operation. If the developer K/transfer belt motor does not operate properly, reattach it and reconnect the connector. If not repaired, replace it.
  2 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the high-voltage contacts of the primary transfer roller firmly connect.
  3 Primary transfer unit replacement The primary transfer belt does not properly rotate. Replace the primary transfer unit when the primary transfer belt does not rotate manually.
  4 Checking the high-voltage contact Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the primary transfer roller. Clean the high-voltage contact of the primary transfer roller, and apply conductive grease to the roller shaft.
  5 Reinstalling the transfer highvoltage PWB Proper current does not flow as high voltage contact of the transfer high voltage PWB is faulty. Reinstall the transfer highvoltage PWB.
  6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Transfer high voltage PWB – Engine PWB . Transfer high voltage PWB – Feed image PWB
  7 Replacing the transfer highvoltage PWB The transfer high-voltage PWB is faulty. Replace the transfer highvoltage PWB.
  8 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  10 Checking the drum unit and the developer unit There is no grounding for the drum unit. Apply conductive grease on the drum drive shaft of the main drive unit. If the drum drive shaft does not contact with the earth plate inside of the drum, replace the drum unit.
  11 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6000
• Description: IH heating error 1
• Causes: After warm-up is started, the center thermistor does not reach 100°C / 212°F even 60s passed. Or, during the warm-up, specified temperature (Ready display temperature) is not detected even 420s passed after center thermistor reached 100°C / 212°F.
• Remedy: 1 Executing U169 The IH setting mismatches the power supply specification. Set the destination same as the voltage of the IH PWB at U169.
  2 Removing foreign material There are foreign objects between the fuser unit and the fuser IH unit. Or, the foreign objects are adhered on the fuser belt. If there are foreign objects between the fuser unit and the fuser IH unit, or on the fuser belt, remove them. After that, reinstall the fuser unit.
  3 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB . Fuser IH unit – IH PWB . IH PWB – Engine PWB
  6 Replacing the fuser unit The temperature cannot be detected properly due to the broken thermostat or the thermistor error. Replace the fuser unit.
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  8 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  9 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser IH unit – IH PWB . IH PWB – Engine PWB
  10 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.

• Code: C6020
• Description: Center thermistor high temperature error
• Causes: The center thermistor detects 245°C / 473°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  4 Replacing the fuser unit The temperature cannot be detected properly due to the thermistor error, etc. Replace the fuser unit.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6030
• Description: Center thermistor broken
• Causes: The center thermistor temperature is detected at less than 41°C / 104°F for 1s when the edge thermistor detects 100°C / 212°F or more during the warm-up.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6050
• Description: Center thermistor low temperature error
• Causes: The center thermistor detected less than 80°C / 176°F for 1s during printing.
• Remedy: 1 Changing the wall outlet The power voltage descends by 10% or more of the rated voltage when printing. Connect the power cord to a different wall outlet if the power supply voltage descends by 10% or more of the rated voltage.
  2 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  3 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  6 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit.
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  8 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  9 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH PWB – Engine PWB
  10 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  11 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser IH unit – IH PWB
  12 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.

• Code: C6120
• Description: Press thermistor high temperature error
• Causes: The press thermistor detected 210°C / 410°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  4 Replacing the fuser unit The temperature cannot be detected properly due to the thermistor error, etc. Replace the fuser unit.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6130
• Description: Press thermistor broken
• Causes: 1. During warm-up, press thermistor detects less than 35 ° C for 60s continuously.
  2. After finishing warm-up, press thermistor detects less than 35 ° C for 10s continuously.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6200
• Description: IH heating error 2
• Causes: The detected temperature of the edge thermistor does not reach 80 ° C within 60s after warm-up starts. During the warm-up, the detected temperature of the edge thermistor does not reach the ready display temperature within 420s after reaching 100 ° C.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit Correct temperature cantbedetectedduetothewireb reakageorthethermistorerrorin thefuserunit.Or,thefuserbeltisf aulty.’ Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH PWB – Engine PWB
  9 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  10 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser IH unit – IH PWB
  11 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.

• Code: C6220
• Description: Edge thermistor high temperature error
• Causes: The edge thermistor detected 245°C / 473°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  4 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.
  8 Reattaching the edge fan motor The edge fan motor is not properly attached. Reattach the edge fan motor.

• Code: C6230
• Description: Edge thermistor broken
• Causes: The edge thermistor detects less than 41°C / 105.8°F for 1s continuously when the center thermistor detected 100°C / 212°F or more during the warm-up.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6250
• Description: Edge thermistor low temperature error
• Causes: The edge thermistor detected less than 80°C / 176°F for 1s during printing.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH PWB – Engine PWB
  9 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  10 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser IH unit – IH PWB
  11 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.

• Code: C6320
• Description: Middle thermistor high temperature error
• Causes: The middle thermistor detected 245°C / 473°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  4 Replacing the fuser unit The temperature is not properly detected due to the wire short-circuit or the thermistor error in the fuser unit. Replace the fuser unit.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.
  8 Reattaching the edge fan motor The edge fan motor is not properly attached. Reattach the edge fan motor.

• Code: C6330
• Description: Middle thermistor broken
• Causes: The middle thermistor detects less than 41°C / 105.8°F for 1s continuously when the center thermistor or the edge thermistor detects 100°C / 212°F or more during the warm-up.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  4 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit.

• Code: C6410
• Description: Uninstalled fuser unit
• Causes: The unit identification code is mismatched. The unit for other models is installed.
• Remedy: 1 Replacing the fuser unit The fuser unit for other models is installed. Install the fuser unit for the applicable models.
  2 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  3 Firmware upgrade The firmware is faulty. Reinstall the engine firmware.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB
  5 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6600
• Description: Fuser belt rotation error
• Causes: The belt rotation pulse is not input for 1.8s continuously.
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Replacing the fuser unit The fuser unit parts such as the fuser belt, the belt rotation detecting system, or the belt rotation sensor are faulty Replace the fuser unit.
  3 Applying the grease The load increases due to the lack of grease on the bushing or the gears for the fuser motor. Execute U030 [Fuser] to check the fuser motor operation. If the fuser motor does not rotate smoothly, apply the grease (EM- 50LP, Part no.: 7BG010009H) to the bushings or the gears.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser motor – Feed drive PWB . Feed drive PWB – Engine PWB . Feed image PWB – Engine PWB
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  8 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  9 Replacing the fuser drive gear The fuser drive gear is faulty. Replace the fuser drive gear.

• Code: C6610
• Description: Fuser pressure release sensor error
• Causes: 1. The fuser pressure release sensor does not turn off even after 3s passed from instructing to reduce the fuser pressure of the fuser pressure release motor or to move the JAM processing position.
  2. The fuser pressure release sensor does not turn on even after 6s passed from instructing to add the fuser pressure of the fuser pressure release motor.
  3. The lock signal of the fuser pressure release motor became Low for 200ms. (However, when shifting to JAM process, stop the fuser pressure release motor only and not service call turns on in the area from the stop position 500ms before to the stop position.)
• Remedy: 1 Reinstalling the fuser unit The foreign objects adhere on the drawer connection terminal of the fuser unit. Or, the drawer connector is not inserted completely. Clean the drawer connection terminal of the fuser unit. Check the pin of the drawer connector is not bent, and replace the fuser unit if it is bent. If the pin is normal, reinstall the fuser unit so that the drawer connector is securely connected.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Execute U030 [Fuser Release]. If the fuser pressure release motor does not operate properly, reconnect the connectors of the following wires. If there is not continuity, replace the wire. Fuser pressure release motor – Feed drive PWB . Feed drive PWB – Engine PWB . Drawer connector of the fuser unit – Feed image PWB . Feed image PWB – Engine PWB . Feed image PWB – Feed drive PWB
  3 Replacing the fuser unit The fuser unit is faulty at the fuser pressure release mechanism or the fuser pressure release sensor . Replace the fuser unit.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Replacing the fuser pressure release motor The fuser pressure release motor is faulty. Replace the fuser pressure release motor.
  9 Replacing the gear in the fuser pressure releasing system at the main unit The gear of the fuser pressure releasing mechanism at the main unit is faulty. Replace the gears in the fuser pressure releasing mechanism at the main unit.

• Code: C6620
• Description: IH core motor rotation error
• Causes: 1. When detecting the home position, IH position sensor does not detect ON within 5s after IH core motor is driven under the condition of the IH position sensor is OFF.
  2. When detecting the home position, IH position sensor does not detect ON after it is turned off within 5s after IH core motor is driven under the condition of the IH position sensor is ON.
  3. When small size paper moves the position, IH position sensor does not detect OFF within a predetermined pulse after IH core motor is driven under the condition of the IH position sensor is ON.
• Remedy: 1 Checking the fuser IH unit The connector of the fuser IH unit is not properly connected. Check if the connector pins of the fuser IH unit do not bend. If the pins bend, fix them. Next, reinstall the fuser IH unit so that the connector firmly connects.
  2 Checking the IH positioning sensor The IH positioning sensor is not properly attached. Reattach the IH positioning sensor.
  3 Cleaning the IH positioning sensor The IH positioning sensor cannot detect properly since it is dirty. Clean the IH positioning sensor.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH core motor (Fuser IH unit) – Feed drive unit . Feed drive PWB – Engine PWB
  5 Replacing the fuser IH unit The IH positioning sensor or the IH core motor is faulty. Replace the fuser IH unit.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6740
• Description: IH PWB high temperature error (IGBT2)
• Causes: The IGBT temperature acquired from the power microprocessor detected is 115°C / 239°F or more for 1s continuously.
• Remedy: 1 Checking the IH PWB fan motor The connection of the IH PWB fan motor, or the IH PWB fan motor is faulty. Execute U037 [IH PWB] and check the operation of the fan motor of the IH PWB. If it is not operating, move to the step2 [connect fan motor of the IH PWB]. If it is operating, move to the step3 [replace fan motor of the IH PWB].
  2 Connecting the IH PWB fan motor The connector of the IH PWB fan motor wire is not inserted securely. Reinsert the connector of the IH PWB fan motor.
  3 Replacing the IH PWB fan motor The IH PWB fan motor is faulty. Replace the IH PWB fan motor.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH PWB – Engine PWB
  5 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6760
• Description: Fuser IH input excessive electric current error
• Causes: The input current obtained from the power microcomputer was 20A (100/120V) or 10A (200V) or more continued for 200ms.
• Remedy: 1 Checking the fuser unit The fuser belt is faulty. Detach the fuser unit and check if the fuser belt is not faulty. If there is any damage, replace the fuser unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. IH PWB – Engine PWB
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  5 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6770
• Description: IH low power error
• Causes: After fuser unit is started to heat, fuser rotation pulse signal cantbedetectedcontinuouslyfor1s. Or,no electric power is supplied to IHfuser unit.(Electric power detection on the IHPWB detected as etelectric power value of 30% or less for a predetermined time.)
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Fuser IH unit – IH PWB . IH PWB – Engine PWB . Feed image PWB – Engine PWB
  2 Checking the fuser unit drawer connectors The fuser unit drawer connectors are not properly connected. If foreign objects adhere on the drawer pins of each drawer connector, clean the drawer pins. If the drawer pins are deformed, repair or replace it. In case the drawer pins in the fuser unit are faulty and they cannot be repaired by cleaning and fixing: Replace the fuser unit. In case the drawer pins in the main unit are faulty and they cannot be repaired by cleaning and fixing: Replace the wire. (Part no.: 302ND4637_). If the drawer pins are not faulty, reinstall the fuser unit into the main unit so that the drawer connectors connect each other firmly.
  3 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  7 Checking the cause depending on the input power The input power is improper. Change the input power.
  8 Replacing the fuser IH unit The fuser IH unit is faulty. (The coil is broken.) Replace the fuser IH unit.
  9 Replacing the fuser unit The belt rotation sensor in the fuser unit is faulty. The thermostat is broken. Replace the fuser unit.

• Code: C6900
• Description: Edge fan motor error
• Causes: The lock-up was detected for 20s continuously when driving the fan motor.
• Remedy: 1 Checking the edge fan motor The connector is not connected properly. The wire is faulty. The fan does not operate as paper size on the MP tray is misdetected. Execute U037 [Fuser Edge] to check the edge fan motor operation. And, check if the paper size on the MP tray is detected properly. If the edge fan motor does not operate properly or the paper size on the MP tray is misdetected, reconnect the connector of the conveying unit (edge fan motor) to the relay connector at the main unit.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Edge fan motor – Feed drive PWB . Feed drive PWB – Engine PWB
  3 Replacing the edge fan motor The edge fan motor is faulty. Replace the edge fan motor.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6910
• Description: Engine firmware unexpected error
• Causes: 1. The engine stabilization control continued for 1 hour.
  2. The feed motor does not drive even passing 3s or more when driving the drum motor or the developer K/transfer belt motor.
  3. Only the high-voltage remote signal turned on under the condition that the drum is stopped.
  4. The main charger bias turned off while the developer bias was on.
• Remedy: 1 Resetting the main power The power startup delays. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Checking the engine PWB The engine PWB is not properly attached or connected. Retighten the screws securing the engine PWB so that it can ground securely, and reinsert the connectors all the way.
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6920
• Description: Eject/IH fan motor error
• Causes: The lock-up was detected for 20s continuously when driving the fan motor.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Execute U037 [Exit Paper IH Coil]. If the following fan motor does not operate properly, clean the terminal of the connector and reconnect the connector. If there is no continuity, replace the wire. Exit/IH front fan motor – Feed image PWB . Exit/IH middle fan motor – Feed image PWB . Exit/ IH rear fan motor – Feed image PWB . Feed image PWB – Engine PWB
  2 Checking the eject/IH fan motors The eject/IH fan motors do not properly operate. Clean the following fan motors, and remove foreign objects if they adhere on the fan motor. If not repaired after that, replace the fan motor. Exit/IH front fan motor . Exit/IH middle fan motor . Exit/IH rear fan motor
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6950
• Description: IH PWB communication error
• Causes: 1. Communication between the IH PWB and the engine PWB is not established in the initial communication. (150ms interval x 10 times retries are performed)
  2. After the initial communication is established, communication between the IH PWB and the engine PWB is not established. (For 500ms)
• Remedy: 1 Resetting the main power The power startup delays. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the connection The connector is not connected properly. Or, the wire is faulty. (Power supply failure to the IH PWB or communication error by the grounding failure.) Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Low voltage PWB – IH PWB . IH PWB – Engine PWB
  3 Checking the power supply voltage The abnormal electric noise is mixed in the power supply voltage. Plug the power cord into another wall outlet.
  4 Checking the low voltage PWB The fuse on the low voltage PWB is broken. Check the continuity of the fuse (F002) on the low voltage PWB. Then, replace the low voltage PWB if there is no continuity.
  5 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6980
• Description: Fuser unit EEPROM error
• Causes: It is not possible to access the fuser unit EEPROM since it matches one of the following.
  1. Five times consecutive detection of no response from the device for more than 5ms on reading / writing.
  2. Data read in 2 places does not match 8 consecutive times.
  3. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Checking the fuser unit drawer connectors The fuser unit drawer connectors are not properly connected. If foreign objects adhere on the drawer pins of each drawer connector, clean the drawer pins. If the drawer pins are deformed, repair or replace it. In case the drawer pins in the fuser unit are faulty and they cannot be repaired by cleaning and fixing: Replace the fuser unit. In case the drawer pins in the main unit are faulty and they cannot be repaired by cleaning and fixing: Replace the wire. (Part no.: 302ND4637_). If the drawer pins are not faulty, reinstall the fuser unit into the main unit so that the drawer connectors connect each other firmly.
  2 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit.
  3 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6990
• Description: Fuser power source destination error
• Causes: The information mismatches between the engine backup and the IH PWB.
• Remedy: 1 Executing U169 The voltage setting at U169 mismatches the voltage of the IH PWB. Set the destination same as the voltage of the IH PWB at U169.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  3 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7001
• Description: Container motor error
• Causes: 1. After the container motor is started, ready signal does not turn on even 2s passed.
  2. After the container motor is stabilized, ready signal is kept off 2s continuously.
• Remedy: 1 Replacing the toner container The toner container locks up and is not rotated. Replace the toner container.
  2 Checking the toner container drive parts The toner container drive parts are not operated properly, or the excessive load is applied to it. Execute U030 [Container Mix] to check the container motor operation. If the container motor does not operate properly, clean the drive gears and the couplings in the container drive unit and apply the grease (EM- 50LP, Part no.: 7BG010009H) to them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Container motor – Feed image PWB
  4 Checking the toner container motor The toner container motor is faulty. Reattach the container motor and reconnect the connector. If not repaired, replace it.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7101
• Description: T/C sensor K error
• Causes: The output value of T/C sensor is not settled within +100 (Toner is not detected) or -1000 (sensor connector is coming off) against the initial toner setting value which is stored in the EEPROM of the developer unit. And this condition was detected 3 times continuously.
• Remedy: 1 Reinstalling the developer unit The developer unit is not properly installed. Reinstall developer unit K so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum/developer relay PWB – Feed image PWB . Feed image PWB – Engine PWB
  3 Replacing the drive gear The drive gear for the developer unit K is broken. (The developer screw does not rotate.) Replace the developer unit K drive gear.
  4 Developer unit replacement Developer unit K (T/C sensor K) is faulty. Replace developer unit K.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7102
• Description: T/C sensor C error
• Causes: The output value of T/C sensor is not settled within +100 (Toner is not detected) or -1000 (sensor connector is coming off) against the initial toner setting value which is stored in the EEPROM of the developer unit. And this condition was detected 3 times continuously.
• Remedy: 1 Reinstalling the developer unit The developer unit is not properly installed. Reinstall developer unit C so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum/developer relay PWB – Feed image PWB . Feed image PWB – Engine PWB
  3 Replacing the drive gear The drive gear for the developer unit C is broken. (The developer screw does not rotate.) Replace the drive gear for developer unit C.
  4 Developer unit replacement Developer unit C (T/C sensor C) is faulty. Replace the developer unit C.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7200
• Description: Inner thermistor broken (developer)
• Causes: Input sampling value of the T/C sensor K (machine inside thermistor) is over the standard value.
• Remedy: 1 Reinstalling the developer unit The developer unit is not properly installed. Reinstall developer unit K so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum/developer relay PWB – Feed image PWB
  3 Developer unit replacement Developer unit K (T/C sensor K) is faulty. Replace developer unit K.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7210
• Description: Inner thermistor short-circuited (developer)
• Causes: Input sampling value of the T/C sensor K (machine inside thermistor) is below the standard value.
• Remedy: 1 Reinstalling the developer unit The developer unit is not properly installed. Reinstall developer unit K so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum/developer relay PWB – Feed image PWB
  3 Developer unit replacement Developer unit K (T/C sensor K) is faulty. Replace developer unit K.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7221
• Description: LSU thermistor broken
• Causes: The input sampling value of the LSU thermistor is at the reference value or more.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 LSU replacement The LSU (LSU thermistor) is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7231
• Description: LSU thermistor short-circuited
• Causes: The input sampling value of the LSU thermistor is at the reference value or less.
• Remedy: 1 Checking the connection FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  2 LSU replacement The LSU (LSU thermistor) is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7241
• Description: Belt thermistor broken
• Causes: The input sampling value of the belt thermistor is at the reference value or more.
• Remedy: 1 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Transfer PWB – Transfer connect PWB . Transfer connect PWB – Feed image PWB
  3 Primary transfer unit replacement The primary transfer unit is faulty. Replace the primary transfer unit.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the transfer connection PWB The transfer connection PWB is faulty. Replace the transfer connection PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7251
• Description: Belt thermistor short-circuited
• Causes: The input sampling value of the belt thermistor is at the reference value or less.
• Remedy: 1 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the connector firmly connects.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Transfer PWB – Transfer connect PWB . Transfer connect PWB – Feed image PWB
  3 Primary transfer unit replacement The primary transfer unit is faulty. Replace the primary transfer unit.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the transfer connection PWB The transfer connection PWB is faulty. Replace the transfer connection PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7301
• Description: Toner motor K error
• Causes: Toner supply motor drive stopped and waited for 0.1s when the pulse plate of the toner supply screw could not detect the pulse for 2s during the toner supply motor operation. Even if these operations repeated 3 times continuously, the pulse could not be detected.
• Remedy: 1 Checking the toner supply drive unit The toner supply screw is not rotated properly due to the excessive load. (The pulse plate is not rotated.) Check if the toner is not clogged inside the toner supply drive unit by rotating the toner supply screw manually. Then, clean the unit if necessary.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Toner motor K – Feed image PWB
  3 Replacing the toner supply drive unit Toner supply drive unit (toner motor K or toner remaining sensor K) is faulty. Replace the toner supply drive unit.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7320
• Description: Toner container detection connector error
• Causes: Disconnection of the toner container detection connector was detected when closing the toner container cover.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Container drive unit (RFID PWB) – Feed image PWB
  2 Checking the container drive unit The connector is not connected properly, or the wire is faulty. If the connector of the wire inside the container drive unit disconnects, reconnect it. If not repaired, replace the container drive unit.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7420
• Description: Uninstalled primary transfer unit
• Causes: 1. Unit identification code does not match.
  2. Unit for the other model is installed.
• Remedy: 1 Primary transfer unit replacement The primary transfer unit for other models is installed. Install the primary transfer unit for the applicable models.
  2 Reinstalling the primary transfer unit The connector of the primary transfer unit is not firmly connected. Reinstall the primary transfer unit so that the connector firmly connects.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Transfer connect PWB – Feed image PWB
  4 Firmware upgrade The firmware is faulty. Reinstall the engine firmware.
  5 Replacing the transfer connection PWB The transfer connection PWB is faulty. Replace the transfer connection PWB.
  6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7470
• Description: Toner sucking fan motor error
• Causes: The lock-up was detected for 20s continuously when driving the fan motor.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Toner absorption fan motor – Feed image PWB
  2 Checking the toner sucking fan motor The fan motor does not rotate properly since it is dirty. Clean the toner sucking fan motor and check if the fan is rotated manually. Then, reattach it.
  3 Replacing the toner sucking fan motor The toner sucking fan motor is faulty. Execute U037 [Toner] to check the operation. If the toner absorption fan motor does not properly operate, replace it.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7480
• Description: Power source fan motor error
• Causes: The lock-up was detected for 20s continuously when driving the fan motor.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Power source fan motor – Engine PWB
  2 Checking the power source fan motor The fan motor does not rotate properly since it is dirty. Clean the power source fan motor and check if the fan is rotated manually. Then, reattach it.
  3 Replacing the power source fan motor The power source fan motor is faulty. Replace the power source fan motor if it does not operate properly when executing U037 [LVU].
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7490
• Description: Eject fan motor error
• Causes: The lock-up was detected for 20s continuously when driving the fan motor.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Exit fan motor (Fuser drive unit) – Feed drive PWB
  2 Checking the eject fan motor The fan motor does not rotate properly since it is dirty. Clean the eject fan motor and check if the fan is rotated manually. Then, reattach it.
  3 Replacing the eject fan motor The eject fan motor is faulty. If the exit fan motor does not operate properly when executing U037 [Exit Cooling], replace it.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  5 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7601
• Description: Front ID sensor error
• Causes: Dark potential error: Sensor output value (FrontDarkP, FrontDarkS) is less than 0.15V or bigger than 0.80V. Bright potential error: FrontBrightS is less than FrontDarkS or FrontBrightP is less than FrontDarkP+0.5V.
• Remedy: 1 Cleaning the front ID sensor The front ID sensor is dirty. Clean the front ID sensor surface.
  2 Checking the ID sensor shutter The ID sensor shutter does not operate properly. Execute U033 [ID Sensor]. If the ID sensor shutter does not operate properly, reattach the cleaning solenoid.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Front ID sensor – Feed drive PWB . Cleaning solenoid – Feed drive PWB . Feed drive PWB – Engine PWB
  4 Replacing the cleaning solenoid The cleaning solenoid is faulty. Replace the cleaning solenoid.
  5 Checking the front ID sensor The front ID sensor is not properly attached. Reattach the front ID sensor.
  6 Replacing the front D sensor The front ID sensor is faulty. Check if the value of U465 [T7 CTD] is fluctuated before and after Calibration, and replace the front ID sensor if it was not fluctuated (uncalibrated).
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7602
• Description: Rear ID sensor error
• Causes: Dark potential error: Sensor output value (RearDarkP, RearDarkS) is less than 0.15V or bigger than 0.80V. Bright potential error: RearBrightS is less than RearDarkS or RearBrightP is less than RearDarkP+0.5V.
• Remedy: 1 Cleaning the rear ID sensor The rear ID sensor is dirty. Clean the rear ID sensor surface.
  2 Checking the ID sensor shutter The ID sensor shutter does not operate properly. Execute U033 [ID Sensor]. If the ID sensor shutter does not operate properly, reattach the cleaning solenoid.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Rear ID sensor – Feed drive PWB . Cleaning solenoid – Feed drive PWB . Feed drive PWB – Engine PWB
  4 Replacing the cleaning solenoid The cleaning solenoid is faulty. Replace the cleaning solenoid.
  5 Checking the rear ID sensor The rear ID sensor is not properly attached. Reattach the rear ID sensor.
  6 Replacing the rear ID sensor The rear ID sensor is faulty. Check if the value of U465 [T7 CTD] is fluctuated before and after Calibration, and replace the rear ID sensor if it was not fluctuated (uncalibrated).
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7611
• Description: Bias calibration read value error (Black)
• Causes: The ID sensors cannot properly read the patch density on the primary transfer belt when executing Calibration or Density Adjustment.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 (In case if the printout is light) Checking the developer unit The developing roller does not contact with the drum. Switch the lock lever up and down and return the developer roller to the setting position. If the developer roller does not return due to the breakage of the lock lever or the failure of the developer roller pressure wire, replace the developer unit.
  3 (In case if the printout is light) Cleaning / replacing the LSU. The laser does not output properly from the LSU. Or, LSU dustproof glass is dirty. Clean the LSU. If not repaired, replace it.
  4 (In case if the printout is light) Improving the condensation of the drum surface Condensation on the drum surface Execute the drum refresh. And next, set [On] at U339 [Drum heater] to turn on the drum heater.
  5 Cleaning the ID sensor The ID sensor is dirty. Clean the surface of the front and rear ID sensors.
  6 Executing Calibration The last calibration failed. Execute U464 [Calib].
  7 Checking the ID sensor shutter The ID sensor shutter does not operate properly. Execute U033 [ID Sensor]. If the ID sensor shutter does not operate properly, reattach the cleaning solenoid.
  8 Checking the primary transfer unit The primary transfer belt surface is dirty. Clean the surface of the primary transfer belt, or replace the primary transfer unit.
  9 Checking the ID sensor The ID sensor is not properly attached, or the connector is not properly connected. Reattach the front and rear ID sensors and reconnect the connectors.
  10 (When the image is too light) Checking the main high voltage PWB / transfer high voltage PWB Proper current does not flow as the main high voltage PWB or the contact point of the transfer high voltage PWB is faulty. Reattach the main high voltage PWB and the transfer high voltage PWB.
  11 (When the image is too light) Checking the drum unit / developer unit / LSU The parts for the drum unit, developer unit and LSU is dirty or worn out. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  12 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  13 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Front ID sensor and Rear ID sensor – Feed drive PWB . Feed drive PWB – Engine PWB
  14 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.
  15 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7800
• Description: Outer thermistor broken
• Causes: The input sampling value of the temperature/humidity sensor (outer thermistor) is at the reference value or more.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Temperature/humidity sensor – Engine PWB
  2 Replacing the temperature/ humidity sensor The temperature/humidity sensor is faulty. Replace the temperature/ humidity sensor.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7810
• Description: Outer thermistor short-circuited
• Causes: The input sampling value of the temperature/humidity sensor (outer thermistor) is at the reference value or less.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Temperature/humidity sensor – Engine PWB
  2 Replacing the temperature/ humidity sensor The temperature/humidity sensor is faulty. Replace the temperature/ humidity sensor.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7901
• Description: Drum unit K EEPROM error
• Causes: 1. Five times consecutive detection of no response from the device for more than 5ms on reading / writing.
  2. Data read in 2 places does not match 8 consecutive times.
  3. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Resetting the main power The data stored in the EEPROM in the drum unit is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Reinstalling the drum unit The drum unit is not properly installed. Reinstall drum unit K to connect the connector firmly.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum unit – Drum/ developer relay PWB . Drum/ developer relay PWB – Feed image PWB . Feed image PWB – Engine PWB
  4 Drum unit replacement The EEPROM in the drum unit is faulty. Replace drum unit K.
  5 Checking the connection of the EEPROMS in each unit EEPROM signal line of some units are faulty grounded. If the signal wire has a ground fault, replace it. Signal wires (SCL, SDA) from the EEPROMs in the drum unit and the developer unit – Drum/developer relay PWB . Signal wires (SCL, SDA) from the EEPROMs in the primary transfer unit and the fuser unit – Feed image PWB
  6 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  8 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7911
• Description: Developer unit K EEPROM error
• Causes: 1. Five times consecutive detection of no response from the device for more than 5ms on reading / writing.
  2. Data read in 2 places does not match 8 consecutive times.
  3. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Resetting the main power The data stored in the EEPROM in the developer unit is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Reinstalling the developer unit The developer unit is not properly installed. Reinstall developer unit K so that the connector firmly connects.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Drum/developer relay PWB – Feed image PWB . Feed image PWB – Engine PWB
  4 Developer unit replacement The EEPROM in the developer unit is faulty. Replace developer unit K.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay PWB.
  7 Checking the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C7941
• Description: LSU EEPROM error
• Causes: Data read in 2 places does not match 8 consecutive times. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Resetting the main power The EEPROM data in the LSU is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the FFC FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  3 LSU replacement The APC PWB (LSU) is faulty. Replace the LSU.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version

• Code: C7942
• Description: LSU EEPROM error 2
• Causes: Data read in 2 places does not match 8 consecutive times. Writing data and reading data does not match 8 consecutive times.
• Remedy: 1 Resetting the main power The EEPROM data in the LSU is faulty. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Checking the FFC FFC is not connected properly. Or it is faulty. Clean the FFC terminals of the following FFC and reconnect them. If the FFC terminal is deformed or broken, replace the FFC. LSU (APC PWB) – Engine PWB
  3 LSU replacement The APC PWB (LSU) is faulty. Replace the LSU.
  4 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version

• Code: C7970
• Description: Weight sensor error
• Causes: The condition of the sensor output value was less than the specified value continued for 500ms.
• Remedy: 1 Reinstalling the waste toner box The waste toner box is not properly installed. Reinstall the waste toner box into the main unit slowly, and then check if it moves vertically.
  2 Checking the wire The relay connector (engine PWB and waste toner motor/ weight sensor) is not connected properly or disconnected as excessive tensioning of the wire located at the back side of the waste toner box unit during maintenance work. Realign the wire so that the wire of the relay connector at the waste toner box unit backside is not excessively strained. Then, reconnect the relay connector.
  3 Checking the weight sensor and the actuator The connector is not properly connected. Or, the actuator is not attached properly. Reconnect the connector of the weight sensor. And, correct the actuator position.
  4 Checking the spring for the weight sensor The spring of the weight sensor is not attached properly. Reattach the spring for the weight sensor located under the waste toner box unit.
  5 Cleaning around the weight sensor The weight sensor and surrounding parts are dirty. Clean around the weight sensor with an air-blower.
  6 Executing U155 The calibration of the weight sensor is not executed properly. Execute the waste toner calibration at U155.
  Replacing the waste toner box The waste toner box is faulty. Replace the waste toner box.
  8 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7980
• Description: Waste toner overflow (Waste toner full sensor error)
• Causes: The waste toner full sensor detected full (lock) of the waste toner box for 4 times continuously.
• Remedy: 1 Checking the waste toner box The waste toner box is full. Replace the waste toner box if it is full.
  2 Checking the waste toner full sensor The connector is not properly connected. Reconnect the connector of the waste toner full sensor.
  3 Cleaning the waste toner box joint section The waste toner is clogged at the waste toner joint section. Clean inside the waste toner box joint section of the main drive unit.
  4 Checking the connection The waste toner box joint section and the waste toner box are not properly connected. Realign the wire so that the wire of the relay connector at the waste toner box unit backside is not excessively strained. Then, reconnect the relay connector. After that, reinstall the waste toner box into the main unit.
  5 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version
  6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Feed image PWB – Feed drive PWB
  7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.
  8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.

• Code: C8010
• Description: PH motor error 1
  Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed)
• Causes: 1. The PH home position sensor does not turn on even 200ms passed when the PH motor drives.
  2. The pulse plate does not count the specified pulse even 300ms passed after the punch operation was started.
  3. After correction operation starts, the punch unit does not stop at 2-pulse position from the PH home position sensor turning on within 500ms. (If the PH home position sensor turns on, the processing finishes normally.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation.
  2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the punch cam drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH motor – PH PWB . PH home position sensor – PH PWB . PH PWB – DF PWB
  4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it.
  5 Checking the PH home position sensor The PH home position sensor is not properly attached, or it is faulty. Execute U241 [Punch] > [Punch HP]. If the PH home position sensor does not operate properly, reattach it. If not repaired, replace it.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version.
  7 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  8 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8020
• Description: PH motor error 2
  Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed)
• Causes: The positioning alignment of the home position is not completed within 3s when initializing or waiting the home position.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation.
  2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the PH cam drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH motor – PH PWB . PH PWB – DF PWB
  4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version.
  6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8030
• Description: PH motor error 3
  Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed)
• Causes: The home position detection does not turn off within 50ms when initializing the home position.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation.
  2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the PH cam drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH motor – PH PWB . PH PWB – DF PWB
  4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version.
  6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8090
• Description: DF paddle motor error
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: 1. The DF paddle sensor does not turn on even 1s passed when the DF paddle motor drives.
  2. The DF paddle sensor does not turn off even if it drives for 1s from on condition.
• Remedy: 1 Checking the DF paddle drive parts The DF paddle drive parts are not properly attached, or it is faulty. Reattach the DF paddle drive parts. If not repaired, replace them.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF paddle motor – DF PWB . DF paddle sensor – DF PWB
  3 Replacing the DF paddle motor The DF paddle motor is faulty. Execute U240 [Motor] > [Beat]. If the DF paddle motor does not operate properly, replace it.
  4 Replacing the DF paddle sensor The DF paddle sensor is faulty. Execute U241 [Finisher] > [Lead Paddle]. If the DF paddle sensor does not operate properly, replace it.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8100
• Description: DF eject release motor error
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: 1. The DF bundle exit sensor does not turn on even 1s passed when the DF exit release motor drives.
  2. The DF bundle exit sensor does not turn off even if drives for 1s from on condition.
• Remedy: 1 Checking the DF bundle exit unit The eject guide in the DF bundle exit unit is deformed. Repair the DF bundle exit unit.
  2 Checking the DF bundle exit unit drive parts The DF bundle exit unit drive parts are not properly attached, or they are faulty. Reattach the DF bundle exit unit drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF exit release motor – DF PWB . DF bundle exit sensor – DF PWB
  4 Replacing the DF eject release motor The DF eject release motor is faulty. Execute U240 [Motor] > [Eject Unlock(HP)]. If the DF exit release motor does not operate properly, replace it.
  5 Checking the DF bundle exit sensor The DF bundle exit sensor is not attached properly or faulty. Reattach the DF bundle exit sensor, then check the sensor operation by executing U241. If the DF bundle exit sensor does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8110
• Description: DF shift motor 1 error
  Object: 4000-sheet finisher
• Causes: DF shift sensor 1 does not turn on even if shifting 160mm when driving DF shift motor 1.
• Remedy: 1 Checking the front shift guide The front shift guide is not assembled properly. If the front shift guide does not move manually, repair the position where restricts the operation.
  2 Checking the front shift guide drive parts The front shift guide drive parts are not properly attached, or they are faulty. Reattach the front shift guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF shift motor 1 – DF PWB . DF shift sensor 1 – DF PWB
  4 Replacing DF shift motor 1 DF shift motor 1 is faulty. Replace DF shift motor 1 if it does not operate properly when checking the operation at U240.
  5 Checking DF shift sensor 1 DF shift sensor 1 is not properly attached, or it is faulty. Reattach DF shift sensor 1, then execute U241 [Finisher] > [Shift Front HP]. If DF shift sensor 1 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8120
• Description: DF shift motor 2 error
  Object: 4000-sheet finisher
• Causes: DF shift sensor 2 does not turn on even if shifting 160mm when driving DF shift motor 2.
• Remedy: 1 Checking the rear shift guide The rear shift guide is not assembled properly. If the rear shift guide does not move manually, repair the position where restricts the operation.
  2 Checking the rear shift guide drive parts The rear shift guide drive parts are not properly attached, or they are faulty. Reattach the rear shift guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF shift motor 2 – DF PWB . DF shift sensor 2 – DF PWB
  4 Checking DF shift motor 2 DF shift motor 2 is faulty. Replace DF shift motor 2 if it does not operate properly when checking the operation at U240.
  5 Checking DF shift sensor 2 DF shift sensor 2 is not properly attached, or it is faulty. Reattach DF shift sensor 2, then execute U241 [Finisher] > [Shift Tail HP]. If DF shift sensor 2 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8130
• Description: DF shift release motor error
  Object: 4000-sheet finisher
• Causes: 1. The DF shift release sensor does not turn on even 1s passed when the DF shift release motor drives.
  2. The DF shift release sensor does not turn on even if the DF shift release motor drives for 3s toward the direction of the HP detection.
  3. The DF shift release sensor does not turn off even if it drives for 3s toward the direction of the HP detection off.
• Remedy: 1 Checking the rear shift guide The rear shift guide is not assembled properly. If the rear shift guide does not move manually, repair the position where restricts the operation.
  2 Checking the rear shift guide drive parts The rear shift guide drive parts are not properly attached, or they are faulty. Reattach the rear shift guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF shift release motor – DF PWB . DF shift release sensor – DF PWB
  4 Checking the DF shift release motor The DF shift release motor is faulty. Replace the DF shift release motor if it does not operate properly when checking the operation at U240.
  5 Checking the DF shift release sensor The DF shift release sensor is not properly attached, or it is faulty. Reattach the DF shift release sensor, then execute U241 [Finisher] > [Shift Unlock HP]. If the DF shift release sensor does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8140
• Description: DF tray motor error 1
  Object: 4000-sheet finisher or 1000-sheet finisher
• Causes: The DF tray sensor or the DF tray upper side sensor does not turn on after passing 30s when ascending the DF main tray or the DF tray.
• Remedy: 1 Checking the DF main tray / DF tray The DF main tray / DF tray is not assembled properly. If the DF main tray or the DF tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF main tray / DF tray drive parts The DF main tray / DF tray drive parts are not properly attached, or they are faulty. Reattach the DF main tray / DF tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PWB
  4 Replacing the DF tray motor The DF tray motor is faulty. Execute U240 [Motor] > [Tray]. If the DF tray motor does not operate properly, replace it.
  5 (When installing the 1000- sheet finisher) Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray sensor 1 – DF PWB
  6 (When installing the 4000- sheet finisher) Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray sensor 1 – DF PWB . DF tray sensor 2 – DF PWB
  7 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray upper surface sensor 1 – DF PWB . DF tray upper surface sensor 2 – DF PWB
  8 (When installing the 1000- sheet finisher) Checking DF tray sensor 1 DF tray sensor 1 is not properly attached, or it is faulty. Reattach DF tray sensor 1, then execute U241 [Finisher] > [Tray U-Limit]. If DF tray sensor 1 does not operate properly, replace it.
  9 (When installing the 4000- sheet finisher) Checking DF tray sensor 1, 2 DF tray sensors 1, 2 are not properly attached, or they are faulty. Reattach DF tray sensor 1 or 2, then execute U241 [Finisher] > [Tray U-Limit] or [Tray HP2]. If DF tray sensor 1 or 2 does not operate properly, replace it.
  10 Checking DF tray upper side sensors 1, 2 DF tray upper surface sensors 1, 2 are not properly attached, or they are faulty. Reattach DF tray upper surface sensor 1 or 2, then execute U241 [Finisher] > [Tray Top]. If DF tray upper surface sensor 1 or 2 does not operate properly, replace it.
  11 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8150
• Description: DF tray motor error 2
  Object: 1000-sheet finisher Remarks: If the error is detected during job, the tray full is displayed and this service call will not come up.
• Causes: Turning on and off of DF tray sensor 1 or DF tray upper side sensors 1, 2 could not be detected after passing 5s when descending the DF tray.
• Remedy: 1 Checking the DF tray The DF tray is not assembled properly. If the DF tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF tray drive parts The DF tray drive parts are not properly attached, or they are faulty. Reattach the DF tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PWB . DF tray sensor 1 – DF PWB . DF tray upper surface sensor 1 – DF PWB . DF tray upper surface sensor 2 – DF PWB
  4 Replacing the DF tray motor The DF tray motor is faulty. Replace the DF tray motor if it does not operate properly when checking the operation at U240.
  5 Checking DF tray sensor 1 DF tray sensor 1 is not properly attached. Reattach DF tray sensor 1, then check the sensor operation by executing U241. If DF tray sensor 1 does not operate properly, replace it.
  6 Checking DF tray upper side sensors 1, 2 DF tray upper side sensors 1, 2 are not properly attached. Reattach DF tray upper surface sensor 1 or 2, then check the sensor operation by executing U241. If DF tray upper surface sensor 1 or 2 does not operate properly, replace it.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8150
• Description: DF tray motor error 2
  Object: 4000-sheet finisher
• Causes: Turning on and off of DF tray sensors 1, 2 or DF tray upper side sensors 1, 2 could not be detected after passing 5s when descending the DF main tray.
• Remedy: 1 Checking the DF main tray The DF main tray is not assembled properly. If the DF main tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF main tray drive parts The DF main tray drive parts are not properly attached, or they are faulty. Reattach the DF main tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PWB . DF tray sensor 1 – DF PWB . DF tray sensor 2 – DF PWB . DF tray upper surface sensor 1 – DF PWB . DF tray upper surface sensor 2 – DF PWB
  4 Replacing the DF tray motor The DF tray motor is faulty. Execute U240 [Motor] > [Tray]. If the DF tray motor does not operate properly, replace it.
  5 Checking DF tray sensors 1, 2 DF tray sensors 1, 2 are not properly attached, or they are faulty. Reattach DF tray sensor 1 or 2, then execute U241 [Finisher] > [Tray U-Limit] or [Tray HP2]. If DF tray sensor 1 or 2 does not operate properly, replace it.
  6 Checking DF tray upper side sensors 1, 2 DF tray upper surface sensors 1, 2 are not properly attached, or they are faulty. Reattach DF tray upper surface sensor 1 or 2, then execute U241 [Finisher] > [Tray Top]. If DF tray upper surface sensor 1 or 2 does not operate properly, replace it.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8160
• Description: DF tray motor error (3)
  Object: 1000-sheet finisher
• Causes: DF tray sensor 3 does not turn on after passing 30s when descending the DF tray.
• Remedy: Checking the DF tray The DF tray is not assembled properly. If the DF tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF tray drive parts The DF tray drive parts are not properly attached, or they are faulty. Reattach the DF tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PWB . DF tray sensor 3 -DF PWB
  4 Checking the DF tray motor The DF tray motor is faulty. Execute U240 [Motor] > [Tray]. If the DF tray motor does not operate properly, replace it.
  5 Checking DF tray sensor 3 DF tray sensor 3 is not properly attached, or it is faulty. Reattach DF tray sensor 3, then check the sensor operation by executing U241. If DF tray sensor 3 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8160
• Description: DF tray motor error (3)
  Object: 4000-sheet finisher
• Causes: DF tray sensors 4, 5 does not turn on after passing 60s when descending the DF main tray.
• Remedy: 1 Checking the DF main tray The DF main tray is not assembled properly. If the DF main tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF main tray drive parts The DF main tray drive parts are not properly attached, or they are faulty. Reattach the DF main tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PWB . DF tray sensor 4 -DF PWB or, . DF tray sensor 5 (when installing the folding unit) -DF PWB
  4 Checking the DF tray motor The DF tray motor is faulty. Execute U240 [Motor] > [Tray]. If the DF tray motor does not operate properly, replace it.
  5 Checking DF tray sensors 4, 5 DF tray sensors 4, 5 are not properly attached, or they are faulty. Reattach DF tray sensor 4 or DF tray sensor 5 (when installing the folding unit), then execute U241 [Finisher] > [Tray L-Limit] or [ Tray L-Limit(BL)]. If DF tray sensor 4 or 5 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8170
• Description: DF side registration motor 1 error 1
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: The home position cannot be detected after passing 3s when relocating to the home position.
• Remedy: 1 Checking the front DF side registration guide The front DF side registration guide is not assembled properly. If the DF side registration front guide does not move manually, repair the position where restricts the operation.
  2 Checking the front DF side registration guide drive parts The DF side registration front guide drive parts are not properly attached, or they are faulty. Reattach the DF side registration front guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF side registration motor 1 – DF PWB . DF side registration sensor 1 – DF PWB
  4 Replacing DF side registration motor 1 DF side registration motor 1 is faulty. Execute U240 [Motor] > [Width Test(A3)] or [Width Test(LD)]. If DF side registration motor 1 does not operate properly, replace it.
  5 Checking DF side registration sensor 1 DF side registration sensor 1 is not properly attached, or it is faulty. Reattach DF side registration sensor 1, then execute U241 [Finisher] > [Width Front HP]. If DF side registration sensor 1 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8180
• Description: DF side registration motor 1 error 2
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: J6810/J6811 (Front DF side registration jam) was detected 2 times continuously.
• Remedy: 1 Checking the front DF side registration guide The front DF side registration guide is not assembled properly. If the DF side registration front guide does not move manually, repair the position where restricts the operation.
  2 Checking the front DF side registration guide drive parts The DF side registration front guide drive parts are not properly attached, or they are faulty. Reattach the front DF side registration guide drive parts.
  3 Replacing the front DF side registration guide drive parts The front DF side registration guide drive parts are faulty. Replace the front DF side registration guide drive parts.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF side registration motor 1 – DF PWB . DF side registration sensor 1 – DF PWB
  5 Checking DF side registration motor 1 DF side registration motor 1 is faulty. Execute U240 [Motor] > [Width Test(A3)] or [Width Test(LD)]. If DF side registration motor 1 does not operate properly, replace it.
  6 Checking DF side registration sensor 1 DF side registration sensor 1 is not properly attached, or it is faulty. Reattach DF side registration sensor 1, then execute U241 [Finisher] > [Width Front HP]. If DF side registration sensor 1 does not operate properly, replace it.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8190
• Description: DF side registration motor 2 error 1
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: The home position cannot be detected after passing 3s when relocating to the home position.
• Remedy: 1 Checking the rear DF side registration guide The rear DF side registration guide is not assembled properly. If the DF side registration rear guide does not move manually, repair the position where restricts the operation.
  2 Checking the rear DF side registration guide drive parts The DF side registration rear guide drive parts are not properly attached, or they are faulty. Reattach the DF side registration rear guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF side registration motor 2 – DF PWB . DF side registration sensor 2 – DF PWB
  4 Replacing DF side registration motor 2 DF side registration motor 2 is faulty. Execute U240 [Motor] > [Width Test(A3)] or [Width Test(LD)]. If DF side registration motor 2 does not operate properly, replace it.
  5 Checking DF side registration sensor 2 DF side registration sensor 2 is not properly attached, or it is faulty. Reattach DF side registration sensor 2, then execute U241 [Finisher] > [Width Tail HP]. If DF side registration sensor 2 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8200
• Description: DF side registration motor 2 error 2
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: J6910/J6911/ (Rear DF side registration jam) was detected 2 times continuously.
• Remedy: 1 Checking the rear DF side registration guide The rear DF side registration guide is not assembled properly. If the DF side registration rear guide does not move manually, repair the position where restricts the operation.
  2 Checking the rear DF side registration guide drive parts The side registration rear guide drive parts are not properly attached, or they are faulty. Reattach the DF side registration rear guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF side registration motor 2 – DF PWB . DF side registration sensor 2 – DF PWB
  4 Checking DF side registration motor 2 DF side registration motor 2 is faulty. Execute U240 [Motor] > [Width Test(A3)] or [Width Test(LD)]. If DF side registration motor 2 does not operate properly, replace it.
  5 Checking DF side registration sensor 2 DF width adjustment sensor 2 is not installed properly. Or, it is faulty. Reattach DF side registration sensor 2, then execute U241 [Finisher] > [Width Tail HP]. If DF side registration sensor 2 does not operate properly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8210
• Description: DF staple motor front/rear error
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: The home position could not be detected after passing 3s when replacing to the home position at the initial operation.
• Remedy: 1 Checking the DF staple unit The DF staple unit is not assembled properly. If the DF staple unit does not move front and back manually, repair the position where restricts the operation.
  2 Checking the DF staple unit drive parts The DF staple unit drive parts are not properly attached, or they are faulty. Reattach the DF staple unit drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF staple motor – DF PWB . DF staple sensor – DF PWB
  4 Replacing the DF staple motor The DF staple motor is faulty. Execute U240 [Motor] > [Staple]. If the DF staple motor does not operate properly, replace the DF staple unit.
  5 Checking the DF staple sensor The DF staple motor is not properly attached, or it is faulty. Reattach the DF staple sensor. Then, replace the DF staple unit if the sensor is not fixed.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8230
• Description: DF staple motor error 1
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: DF staple JAM is detected 2 times continuously. (The condition of JAM detection for the second time: after the motor is started, home position cantbedetectedeven600mspassed.)
• Remedy: 1 Checking the DF staple unit The DF staple unit is not assembled properly. If the DF staple cantbedonewithoutpaperjam,rep airthepositionwhererestrictstheo peration.’
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF staple unit – DF PWB
  3 Replacing the DF staple unit The DF staple unit is faulty. Replace the DF staple unit.
  4 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8250
• Description: DF main tray error 4
  Object: 1000-sheet finisher
• Causes: The lock-up signal was 0.7V or less for 10s continuously during the DF tray motor operation.
• Remedy: 1 Checking the DF tray The DF tray is not assembled properly. If the DF tray does not move up and down manually, repair the position where restricts the operation.
  2 Checking the DF tray drive parts The DF tray drive parts are not properly attached, or they are faulty. Reattach the DF tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF tray motor – DF PW
  4 Replacing the DF tray motor The DF tray motor is faulty. Replace the DF tray motor if it does not operate properly when checking the operation at U240.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8260
• Description: DF middle motor HP detection error
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: J790X (Middle paddle jam) was detected 2 times continuously.
• Remedy: 1 Checking the DF paddle drive parts The DF paddle drive parts are not properly attached, or it is faulty. Reattach or replace the DF paddle drive parts.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF middle motor – DF PWB . DF paddle sensor – DF PWB
  3 Replacing the DF middle motor The DF middle motor is faulty. Execute U240 [Motor] > [Middle(H)] or [Middle(L)]. If the DF middle motor does not operate properly, replace it.
  4 Checking the DF paddle sensor The DF paddle sensor is not properly attached, or it is faulty. Reattach the DF paddle sensor, then execute U241 [Finisher] > [Lead Paddle]. If the DF paddle sensor does not operate properly, replace it.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8300
• Description: Main program error / BF unit communication error
  Object: 4000-sheet finisher with the folding unit
• Causes: After confirming connection with the holding unit, the communication has cut off.
• Remedy: 1 Checking the BF set sensor The BF set sensor is not attached properly. Reattach the BF set sensor.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF PWB – DF PWB
  3 Replacing the BF set sensor The BF set sensor is faulty. Execute U241 [Booklet] > [Set]. If the BF set sensor does not operate properly, replace it.
  4 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8310
• Description: BF side registration motor 2 error
  Object: 4000-sheet finisher with the folding unit
• Causes: BF side registration sensor 2 does not turn on after passing 1s during the initial operation.
• Remedy: 1 Checking the upper BF side registration guide The upper BF side registration guide is not assembled properly. If the BF side registration upper guide does not move front and back manually, repair the position where restricts the operation.
  2 Checking the upper BF side registration guide drive parts The BF side registration upper guide drive parts are not properly attached, or they are faulty. Reattach the BF side registration upper guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF side registration motor 2 – BF PWB . BF side registration sensor 2 – BF PWB
  4 Replacing BF side registration motor 2 BF side registration motor 2 is faulty. Replace BF side registration motor 2 if it does not operate properly when checking the operation at U240.
  5 Checking BF side registration sensor 2 BF side registration sensor 2 is not properly attached, or it is faulty. Reattach BF side registration sensor 2, then execute U241 [Booklet] > [Width Down HP]. If BF side registration sensor 2 does not operate properly, replace it.
  6 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8320
• Description: BF adjustment motor error
  Object: 4000-sheet finisher with the folding unit
• Causes: At the initialization, turning on of the BF adjustment sensor is not detected after 2.5s passes.
• Remedy: 1 Checking the BF shift belt The BF shift belt is not assembled properly. If the BF shift belt is not operated manually, repair the part that restricts the operation.
  2 Checking the BF shift belt drive parts The BF shift belt drive parts are not properly attached, or they are faulty. Reattach the BF shift belt drive parts. If the belt comes off, reattach it. If not repaired, replace the BF shift belt drive parts.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF adjusting motor 1, 2 – BF PWB . BF adjusting sensor 1, 2 – BF PWB
  4 Replacing BF adjustment motors 1, 2 BF adjustment motors 1, 2 are faulty. Execute U240 [Booklet] > [Bundle Down] or [Bundle Up]. If DF adjusting motor 1 or 2 does not operate properly, replace it.
  5 Checking BF adjustment sensors 1, 2 BF adjustment sensors 1, 2 are not properly attached, or they are faulty. Reattach BF adjusting sensor 1 or 2, then execute U241 [Booklet] > [Bundle Down HP] or [Bundle Up HP]. If BF adjusting sensor 1 or 2 does not operate properly, replace it.
  6 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8330
• Description: BF blade motor error
  Object: 4000-sheet finisher with the folding unit
• Causes: The BF blade sensor does not turn on after passing 3s during the initial operation.
• Remedy: 1 Checking the BF blade The BF blade is not assembled properly. If the BF blade does not operation manually, repair the position where restricts the operation.
  2 Checking the BF blade drive parts The BF blade drive parts are not properly attached, or they are faulty. Reattach the BF blade drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF blade motor – BF PWB . BF blade sensor – BF PWB
  4 Replacing the BF blade motor The BF blade motor is faulty. Execute U240 [Booklet] > [Blade]. If the BF blade motor does not operate properly, replace it.
  5 Checking the BF blade sensor The BF blade sensor is not properly attached. Reattach the BF blade sensor, then execute U241 [Booklet] > [Blade HP]. If the BF blade sensor does not operate properly, replace it.
  6 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8340
• Description: BF staple motor error 1
  Object: 4000-sheet finisher with the folding unit
• Causes: BF staple JAM is detected 2 times continuously. (The condition of JAM detection for the second time: after the motor is started, home position cantbedetectedeven600mspassed.)
• Remedy: 1 Checking the BF staple unit The BF staple unit is not assembled properly. If the BF staple unit does not operation manually, repair the position where restricts the operation.
  2 Checking the BF staple unit drive parts The BF staple unit drive parts are not properly attached, or they are faulty. Reattach the BF staple unit drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF staple unit – DF PWB
  4 Replacing the BF staple unit The BF staple motor is faulty. Execute U240 [Booklet] > [Staple]. If the BF staple motor does not operate properly, replace the BF staple unit.
  5 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8350
• Description: BF side registration motor 1 error
  Object: 4000-sheet finisher with the folding unit
• Causes: BF side registration sensor 1 does not turn on after passing 1s during the initial operation.
• Remedy: 1 Checking the lower BF side registration guide The lower BF side registration guide is not assembled properly. If the BF side registration lower guide does not operation manually, repair the position where restricts the operation.
  2 Checking the lower BF side registration guide drive parts The BF side registration lower guide drive parts are not properly attached, or they are faulty. Reattach the BF side registration lower guide drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF side registration motor 1 – BF PWB . BF side registration sensor 1 – BF PWB
  4 Replacing BF side registration motor 1 BF side registration motor 1 is faulty. Replace BF side registration motor 1 if it does not operate properly when checking the operation at U240.
  5 Checking BF side registration sensor 1 BF side registration sensor 1 is not properly attached, or it is faulty. Reattach BF side registration sensor 1, then execute U241 [Booklet] > [Width Up HP]. If BF side registration sensor 1 does not operate properly, replace it.
  6 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8360
• Description: BF main motor error
  Object: 4000-sheet finisher with the folding unit
• Causes: The lock-up signal was detected for 1s continuously during the motor operation.
• Remedy: 1 Checking the BF conveying roller The BF conveying roller is not assembled properly. If the BF conveying roller is not rotated manually, repair the part that restricts the operation.
  2 Checking the BF conveying roller drive parts The BF conveying roller drive parts are not properly attached, or they are faulty. Reattach the BF conveying roller drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF main motor – BF PWB
  4 Replacing the BF main motor The BF main motor is faulty. Execute U240 [Booklet] > [Blade]. If the BF blade motor does not operate properly, replace it.
  5 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8370
• Description: BF staple motor error 2
  Object: 4000-sheet finisher with the folding unit
• Causes: BF staple JAM is detected 2 times continuously. (The condition of JAM detection for the second time: during the motor is operating, home position cant be detected even 600ms passed.)
• Remedy: 1 Checking the BF staple unit The BF staple unit is not assembled properly. If the BF staple unit does not operation manually, repair the position where restricts the operation.
  2 Checking the BF staple unit drive parts The BF staple unit drive parts are not properly attached, or they are faulty. Reattach the BF staple unit drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF staple unit – DF PWB
  4 Replacing the BF staple motor The BF staple motor is faulty. Execute U240 [Booklet] > [Staple]. If the BF staple motor does not operate properly, replace it.
  5 Replacing the BF staple unit The BF staple unit is faulty. Replace the BF staple unit.
  6 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C8410
• Description: PH slide motor error 1
  Object: 4000-sheet finisher or 1000-sheet finisher with the punch unit
• Causes: The PH slide sensor does not turn on after shifting 30mm when relocating to the home position.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch slide section does not move front and back manually, repair the position where restricts the operation. 2 Checking the PH drive parts The PH drive parts are not attached properly, or faulty. Reattach the PH drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH slide motor – PH PWB . PH slide sensor – PH PWB . PH PWB – DF PWB
  4 Replacing the PH slide motor The PH slide motor is faulty. Execute U240 [Motor] > [Punch Move]. If the PH slide motor does not operate properly, replace the DF staple unit.
  5 Checking the PH slide sensor The PH slide sensor is not properly attached, or it is faulty. Reattach the PH slide sensor, then check the sensor operation by executing U241. If the PH slide sensor does not operate properly, replace it.
  6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8420
• Description: PH slide motor error 2
  Object: 4000-sheet finisher or 1000-sheet finisher with the punch unit
• Causes: The paper edge cannot be detected even if shifting 30mm when detecting the paper edge.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch slide section does not move front and back manually, repair the position where restricts the operation. 2 Checking the PH drive parts The PH drive parts are not attached properly, or faulty. Reattach the PH drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH slide motor – PH PWB . PH paper edge sensor 1, 2 – PH PWB . PH PWB – DF PWB
  4 Replacing the PH slide motor The PH slide motor is faulty. Execute U240 [Motor] > [Punch Move]. If the PH slide motor does not operate properly, replace the DF staple unit.
  5 Checking the PH paper edge sensors 1, 2 PH paper edge sensors 1, 2 are not properly attached, or they are faulty. Reattach PH paper edge sensor 1 or 2, then check the sensor operation by executing U241. If PH paper edge sensor 1 or 2 does not operate properly, replace it.
  6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8430
• Description: Main program error / Punch unit communication error
  Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed)
• Causes: The communication could not succeed after confirming the connection with the punch unit.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. PH PWB – DF PWB
  2 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB.
  3 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8500
• Description: Main program error / Mail Box communication error
  Object: 4000-sheet finisher with the mail box
• Causes: The communication failed after confirming the connection with the mail box.
• Remedy: 1 Resetting the main power The PWB malfunctions. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on. 2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. MT PWB – DF PWB
  3 Replacing the MT PWB The MT PWB is faulty. Replace the MT PWB.
  4 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8510
• Description: MB conveying motor error 1
  Object: 4000-sheet finisher with the mail box
• Causes: The MT home position sensor does not turn on after passing 10s during the initial operation.
• Remedy: 1 Checking the MT conveying roller The MT conveying roller is not assembled properly. If the MT conveying roller is not rotated manually, repair the part that restricts the operation.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. MT conveying motor – MT PWB . MT home position sensor – MT PWB
  3 Replacing the MT conveying motor The MT conveying motor is faulty. Execute U240 [Mail Box] > [Conv]. If the MT conveying motor does not operate properly, replace it.
  4 Checking the MT home position sensor The MT home position is not properly attached, or it is faulty. Reattach the MT home position sensor, then execute U241 [Mail Box] > [Motor HP]. If the MT home position sensor does not operate properly, replace it.
  5 Replacing the MT PWB The MT PWB is faulty. Replace the MT PWB.

• Code: C8520
• Description: MB conveying motor error 2
  Object: 4000-sheet finisher with the mail box
• Causes: The MT home position sensor does not turn off after passing 2s during the standby operation.
• Remedy: 1 Checking the MT conveying roller The MT conveying roller is not assembled properly. If the MT conveying roller is not rotated manually, repair the part that restricts the operation.
  2 Checking the MT conveying roller drive parts The MT conveying roller drive parts are not properly attached, or they are faulty. Reattach the MT conveying roller drive parts.
  3 Replacing the MT conveying roller drive parts The MT conveying roller drive parts are faulty. Replace the MT conveying roller drive parts.
  4 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. MT conveying motor – MT PWB . MT home position sensor – MT PWB
  5 Replacing the MT conveying motor The MT conveying motor is faulty. Execute U240 [Mail Box] > [Conv]. If the MT conveying motor does not operate properly, replace it.
  6 Checking the MT home position sensor The MT home position is not properly attached, or it is faulty. Reattach the MT home position sensor, then execute U241 [Mail Box] > [Motor HP]. If the MT home position sensor does not operate properly, replace it.
  7 Replacing the MT PWB The MT PWB is faulty. Replace the MT PWB.

• Code: C8800
• Description: Main program error / Engine – DF communication error (DF)
  Object: 1000-sheet finisher, 4000-sheet finisher
• Causes: 1. When turning on the power, there was an error in the main program.
  2. The communication error between the Engine and DF is detected 10 times continuously.
  3. The ready signal is not notified from the DF within 6s after the communication starts.
• Remedy: 1 Resetting the main power The program does not start up properly. Turn the power switch and the main power switch off . After 5s passes, turn the main power switch and the power switch on.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the DP firmware to the latest version.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF PWB – Engine PWB
  4 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C8900
• Description: DF backup error
  Object: 1000-sheet finisher, 4000-sheet finisher For internal count
• Causes: The writing data and the reading data mismatch 3 times continuously.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. DF PWB – Engine PWB
  2 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8930
• Description: BF unit backup error
  Object: 4000-sheet finisher with the folding unit For internal count
• Causes: The writing data and the reading data mismatch 3 times continuously.
• Remedy: 1 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. BF PWB – DF PWB
  2 Replacing the BF PWB The BF PWB is faulty. Replace the BF PWB.

• Code: C9540
• Description: Backup data error
• Causes: When multiple parts are replaced at the same time, the internal data is changed and it interferes with the machine operation. Consequently, the main unit cannot recover.
• Remedy: 1 Checking the PWB Multiple PWBs were replaced at the same time. Recover to the original, if 2 or more of the following related parts were replaced at the same time. Related parts: Memory, each PWB
  2 Checking the unit Multiple units were replaced at the same time. Be sure not to perform the following works at the same time when the memory or each PWB is replaced. Replacing the drum unit or the developer unit . Relocating the drum units to other colors position inside a main unit.

• Code: F000
• Description: Communication error between the main unit and CPU
• Causes: The panel cannot be detected since the CPU communication between the main PWB and the operation panel main PWB is unavailable.
• Remedy: 1 Resetting the main power The communication between the main PWB and the operation panel main PWB is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Checking the connection The connector is not connected properly. Or, the wire or the SATA cable is faulty. Clean the below wire, the terminal of SATA cable connector and reconnect them. If there is no continuity, replace the wire. Main PWB – Operation panel main PWB
  3 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  Replacing the operation panel main PWB The operation panel main PWB is faulty. Replace the panel main PWB.

• Code: F010
• Description: Program read error (SSD)
• Causes: The garbled 2bit data was detected during the program read from the flash memory.
• Remedy: 1 (When the service call error appears after replacing the SSD) Replacing the SSD along the correct procedures The firmware is not stored in the SSD. Insert the USB memory device containing all released firmware into the main unit, and turn the main power on.
  2 Checking the SSD (if lit after replacing the SSD) An SSD out of specification is installed. Install the SSD matching the memory capacity specification.
  3 Resetting the main power The communication between the main PWB and the operation panel main PWB is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  4 Checking the SSD The SSD is not installed properly. Check if there is an error on the terminal of the SSD and Clean. After that, reconnect SSD.
  5 Checking the connection The connector is not connected properly. Or, the wire or the SATA cable is faulty. Clean the below wire, the terminal of SATA cable connector and reconnect them. If there is no continuity, replace the wire. Main PWB – Operation panel main PWB
  6 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data.
  7 Replacing the SSD The SSD is faulty. Execute U026 to back up the SSD data. After that, replace SSD and turn on the power while USB memory that contains the firmware for the appropriate model is inserted to the main unit.
  8 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: F020
• Description: System memory error (RAM reading/writing error or CPU memory error)
• Causes: The error appears during the reading/writing check of the RAM for the CPU when the main unit starts up.
• Remedy: 1 Resetting the main power The communication between the main PWB and the operation panel main PWB is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data
  3 Checking the main PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the main PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace them. If not resolved, replace the main PWB.

• Code: F021
• Description: System memory error (RAM reading/writing error or ASIC memory error)
• Causes: Error occurred when checking read/write of RAM for main PWB ASIC at start up.
• Remedy: 1 Resetting the main power The main PWB does not properly start up. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data.
  3 Checking the main PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the main PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace them. If not resolved, replace the main PWB.

• Code: F040
• Description: Communication error between the main unit and CPU (Communication error between the controller and the print engine)
• Causes: There is an error in the communication between the main PWB and the engine PWB.
• Remedy: 1 Resetting the main power The communication between the controller and the print engine is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Engine PWB (YC43) – Main PWB (YC63) . Engine PWB – Low voltage PWB (YC63)
  3 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.
  5 Replacing the low voltage PWB Power is not supplied from the low voltage PWB to the engine PWB. If there is no output of 5V and 24V from the low voltage PWB, replace the low voltage PWB.

• Code: F050
• Description: Engine main program error
• Causes: The engine program cannot start up.
• Remedy: 1 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Update
  2 Resetting the main power The print engine ROM checksum is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  3 Checking the EEPROM The EEPROM is not properly attached. Reattach the EEPROM.
  4 Checking the engine PWB The connector or the FFC is not connected properly. Or, the wire, FFC, the PWB is faulty. Clean the terminal of the connectors on the engine PWB, reconnect the connector of the wire, and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace it. If not resolved, replace the engine PWB.

• Code: F052
• Description: Panel engine program error
• Causes: The panel program cannot start up.
• Remedy: 1 Firmware upgrade The firmware is not the latest version. Upgrade the panel firmware to the latest version.
  2 Resetting the main power The panel RAM checksum is faulty. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the connector on the operation panel main PWB and reconnect the connector. If there is no continuity, replace the wire.
  4 Replacing the operation panel main PWB The operation panel main PWB is faulty. Replace the panel main PWB.

• Code: F186
• Description: Abnormal detection in the Video control section
• Causes: There is an error in the communication between the main PWB and the engine PWB.
• Remedy: 1 Resetting the main power As the power reset was performed instantly, an error occurred in the communication between the controller and the engine. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Checking the connection FFC is not connected properly. Or it is faulty. Clean the following FFC terminal of the FFC and reconnect. If the FFC terminal is deformed or FFC is short circuited, replace FFC. Engine PWB (YC35) – Main PWB (YC43)
  3 Firmware upgrade The firmware is not the latest version. Upgrade the main firmware and the engine firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: F278
• Description: Error detection of the secondary power supply
• Causes: The operation became unstable as the primary power supply temporarily drops off and recovers.
• Remedy: 1 Resetting the main power The power reset was performed instantly. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch.
  2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the connector on the low voltage PWB and reconnect the connector of the wire. If there is no continuity, replace the wire.
  3 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB.

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