Fixing Kyocera TASKalfa 308ci Printer Error Codes in details

Fixing Kyocera TASKalfa 308ci Printer Error Codes in details

– Printer model: Kyocera TASKalfa 308ci
– Fix Error codes on Kyocera TASKalfa 308ci model and its description:

• Code: C0030
• Description: FAX PWB system error
• Causes: The FAX processing cannot be continued due to the FAX firmware error.
• Remedy: 1 Reinstalling the FAX PWB The FAX PWB does not operate properly. Turn off the power switch and pull out the power plug. After passing 5s, reattach the FAX PWB and reinsert the power plug. Then, turn on the power switch.
  2 Firmware upgrade The firmware is faulty. Reinstall the FAX firmware.
  3 Replacing the FAX PWB The FAX PWB is faulty. Replace the FAX PWB.

• Code: C0070
• Description: FAX PWB incompatible detection error
• Causes: Abnormal detection of FAX control PWB incompatibility in the initial communication with the FAX control PWB, any normal communication command is not transmitted.
• Remedy: 1 Checking the FAX PWB The incompatible FAX PWB is installed. Install the FAX PWB for the applicable model.
  2 Firmware upgrade The FAX firmware is faulty. Reinstall the FAX firmware.

• Code: C0100
• Description: Backup memory device error
• Causes: An abnormal status is output from the flash memory.
• Remedy: 1 Resetting the main power The EEPROM does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the EEPROM The EEPROM is not properly attached. Reinstall the EEPROM on the main PWB.
  3 Checking the EEPROM The EEPROM is faulty. Replace the EEPROM. Then, execute U004 as service call error C0180 will appear after replacing the EEPROM.
  4 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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: MAC address data was incorrect data.
• Remedy: 1 Resetting the main power The flash memory does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  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 off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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: C0140
• Description: Backup memory data error
• Causes: The data read from the flash memory is judged as abnormal at the startup.
• Remedy: 1 Resetting the main power The flash memory does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Executing U021 The flash memory does not operate properly. Execute U021.
  3 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the EEPROM The EEPROM is not properly attached. Reattach the EEPROM on the engine PWB.
  3 Replacing the EEPROM The EEPROM is faulty. Replace the EEPROM on the engine PWB and execute U004.
  4 Checking the engine PWB The connector and FFC are not connected properly or the wire, FFC or 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: C0160
• Description: EEPROM data error
• Causes: The data read from the EEPROM is judged as abnormal.
• Remedy: 1 Resetting the main power The EEPROM does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  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 U004.

• Code: C0170
• Description: Charger count error
• Causes: The values in one of the billing counters, life counter or the scanner counter mismatch between the main side and the engine side.
• Remedy: 1 Checking the machine serial number 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.
  2 Checking the machine serial number 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 The EEPROM is faulty. In case if the machine serial No. registered in the engine PWB is different in U004, reattach the EEPROM on the engine PWB. If it is not fixed, replace the EEPROM and execute U004. Note: Be sure not to execute U004 if the machine serial No. is different from the machine serial No. indicated on the main unit. Otherwise, the different machine serial No. will be overwritten. (Don’t select [Execute] and press the [Start] key.)
  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 number 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.
  2 Checking the machine serial number 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 The EEPROM is faulty. In case if the machine serial No. registered in the engine PWB is different in U004, reattach the EEPROM on the engine PWB. If it is not fixed, replace the EEPROM and execute U004. Note: Be sure not to execute U004 if the machine serial No. is different from the machine serial No. indicated on the main unit. Otherwise, the different machine serial No. will be overwritten. (Don’t select [Execute] and press the [Start] key.)
  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 PWB is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected 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 PWB – Main PWB
  3 Replacing the operation panel PWB The operation panel PWB is faulty. Replace the operation panel PWB.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C0360
• Description: Communication error between the engine PWB and ASIC
• Causes: The checksum error appears or the video signal is not reversed when checking the read-back data after transmitting the data. (Successive failure 10 times)
• Remedy: 1 Resetting the main power The main PWB does not properly operate. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the engine PWB The connector and FFC are not connected properly or the wire, FFC or 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: C0640
• Description: Flash memory (SSD) error
• Causes: The SSD I/O error is detected when accessing the file after the ready mode.
• Remedy: 1 Resetting the main power The SSD (HD-6 or HD-7) is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the SSD (HD-6 or HD-7) The SSD (HD-6 or HD-7) is faulty. Turn off the power switch and unplug the power cord. Then, reinstall the SSD (HD-6 or HD-7).
  3 Reconnecting the SSD (HD-6 or HD-7) The connection with the main PWB is faulty. Reconnect the KUIO connector on the main PWB and the SSD (HD-6 or HD-7).
  4 Initializing the SSD (HD-6 or HD-7) The storage data in the SSD (HD-6 or HD-7) is faulty. Initialize the SSD (HD-6 or HD-7) by executing U024.
  5 Replacing the SSD (HD-6 or HD-7) The SSD (HD-6 or HD-7) is faulty. Replace the SSD (HD-6 or HD-7).
  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 job’s log if the phenomenon can be reproduced by specifying the job when the error was detected.
  3 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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: C0830
• Description: FAX PWB flash program area checksum error
• Causes: The program stored in the flash memory on the FAX PWB is broken so it cannot perform.
• Remedy: 1 Firmware upgrade The firmware is faulty. Reinstall the FAX firmware.
  2 Reinstalling the FAX PWB The FAX PWB does not operate properly. Turn off the power switch and pull out the power plug. After passing 5s, reattach the FAX PWB and reinsert the power plug. Then, turn on the power switch.
  3 Initializing the fax The data in the FAX PWB is faulty. Execute U600 to initialize the FAX.
  4 Replacing the FAX PWB The FAX PWB is faulty. Replace the FAX PWB. Step

• Code: C0840
• Description: RTC error (‘Time for maintenance T’ appears)
• Causes: 1. The normal communication is not available with the RTC device.
  2. There is mismatch in the RTC data due to dead battery or short-circuit with metal parts.
• Remedy: 1 Setting the RTC RTC is not properly set. Set the RTC in the System Menu.
  2 Checking the main PWB The main PWB is not properly attached. Retighten the screws for the PWB.
  3 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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: C0870
• Description: PC FAX Image data transmission error
• Causes: Data was not properly transmitted even if the specified times of retry were made when the large volume data is transmitted into the FAX PWB.
• Remedy: 1 Reinstalling the FAX PWB The FAX PWB does not operate properly. Turn off the power switch and pull out the power plug. After passing 5s, reattach the FAX PWB and reinsert the power plug. Then, turn on the power switch.
  2 Initializing the fax The data in the FAX PWB is faulty. Execute U600 to initialize the FAX.
  3 Firmware upgrade The FAX firmware is faulty. Upgrade the fax firmware to the latest version.
  4 Replacing the FAX PWB The FAX PWB is faulty. Replace the FAX PWB.

• Code: C0920
• Description: FAX file system error
• Causes: The backup data could not be stored since the file system of the flash memory is faulty.
• Remedy: 1 Initializing the fax FAX control values are incorrect. Execute U600 to initialize the FAX.
  2 Reinstalling the FAX PWB The FAX PWB does not operate properly. Turn off the power switch and pull out the power plug. After passing 5s, reattach the FAX PWB and reinsert the power plug. Then, turn on the power switch.
  3 Firmware upgrade The firmware is faulty. Reinstall the FAX firmware.
  4 Replacing the FAX PWB The FAX PWB is faulty. Replace the FAX PWB.

• Code: C0950
• Description: FAX job stay error
• Causes: Print processing of the received FAX could not be executed and the job continues staying.
• Remedy: 1 Resetting the main power The printing process is not properly executed. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Firmware upgrade The firmware is faulty. Upgrade the main firmware to the latest version.

• Code: C0970
• Description: 24V power interruption detection
• Causes:
• Remedy: 1 Resetting the main power The engine PWB does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the interlock switch The interlock switch does not turn on. Check if the interlock switch turns on by closing the front cover. If it does not turn on, reattach the interlock switch.
  3 Checking the connection The connector is not properly connected 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. • Lower voltage PWB – Engine PWB
  4 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1010
• Description: Lift motor 1 error
• Causes: 1. The lift sensor does not turn on if 12s passes after inserting the cassette.
  2. The lift sensor does not turn on after passing 1s from ascending control since it turned off during the printing.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. If the lift plate does not ascend or descend, correct it or replace it.
  2 Checking the drive gear The drive gear does not rotate properly. Check if MP lift plate elevation drive gears rotate or have no excessive load. And apply the grease to the frictional parts and repair the related parts so that they can rotate properly.
  3 Checking the connection The connector is not properly connected 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 sensor – Engine PWB
  4 Checking the lift sensor The lift sensor is not properly attached, or it is faulty. Reattach PF lift upper limit sensor. If not repaired, replace it.
  5 Checking the lift motor The lift motor is not properly attached, or it is faulty. Reattach the lift motor. If it is 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: C1020
• Description: PF lift motor 1 error
  Target: Paper feeder (500-sheet x 1)
• Causes: 1. The PF lift sensor does not turn on if 12s passes after inserting the cassette.
  2. The PF lift sensor does not turn on after passing 1s from ascending control since it turned off during the printing.
  3. The current of the PF lift motor exceeding the specified value is detected for 500ms or more continuously during the PF lift motor operation.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. If the lift plate does not ascend or descend, correct it or replace it.
  2 Checking the drive gear The drive gear does not rotate properly. Check if MP lift plate elevation drive gears rotate or have no excessive load. And apply the grease to the frictional parts and repair the related parts so that they can rotate properly.
  3 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF lift motor – PF PWB • PF lift sensor – PF PWB • PF PWB – Drawer connector – PF PWB (500-sheetx1) • PF PWB (500-sheetx1) – Drawer connector – Engine PWB
  4 Checking the PF lift motor PF lift motor is not attached properly or faulty. Reattach the PF lift motor. If it is not repaired, replace it.
  5 Checking the PF lift sensor The PF lift motor is not properly attached, or it is faulty. Reattach the PF lift sensor. If it is not repaired, replace it.
  6 Replacing the PF PWB The PF PWB is faulty. Replace the PF 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: C1030
• Description: PF lift motor 2 error
  Target: Paper feeder (500-sheet x 2), large capacity feeder (2,000-sheet)
• Causes: 1. The PF lift sensor does not turn on if 12s (500-sheet feeder or 2 cassettes of 500-sheet feeder) or 17s (2000-sheet feeder) passes after inserting the cassette.
  2. The PF lift sensor does not turn on after passing 1s from the ascending control since the it turned off during the printing.
  3. The current of the PF lift motor exceeding the specified value is detected for 500ms or more continuously during the PF lift motor operation.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. If the lift plate does not ascend or descend, correct it or replace it.
  2 Checking the drive gear The drive gear does not rotate properly. Check if MP lift plate elevation drive gears rotate or have no excessive load. And apply the grease to the frictional parts and repair the related parts so that they can rotate properly.
  3 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF lift motor – PF PWB • PF lift sensor – PF PWB • PF PWB – Drawer connector – PF PWB (500-sheetx1) • PF PWB (500-sheetx1) – Drawer connector – Engine PWB
  4 Checking the PF lift motor PF lift motor is not attached properly or faulty. Reattach the PF lift motor. If it is not repaired, replace it.
  5 Checking the PF lift sensor The PF lift motor is not properly attached, or it is faulty. Reattach the PF lift sensor. If it is not repaired, replace it.
  6 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  7 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB for the paper feeder (500-sheetx1).
  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: C1040
• Description: PF lift motor 3 error
  Target: Paper feeder (500-sheet x 2)
• Causes: 1. The PF lift sensor does not turn on if 12s passes after inserting the cassette.
  2. The PF lift sensor does not turn on after passing 1s from ascending control since it turned off during the printing.
  3. The current of the PF lift motor exceeding the specified value is detected for 500ms or more continuously during the PF lift motor operation.
• Remedy: 1 Checking the lift plate The lift plate does not operate properly. If the lift plate does not ascend or descend, correct it or replace it.
  2 Checking the drive gear The drive gear does not rotate properly. Check if MP lift plate elevation drive gears rotate or have no excessive load. And apply the grease to the frictional parts and repair the related parts so that they can rotate properly.
  3 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF lift motor – PF PWB • PF lift sensor – PF PWB • PF PWB – Drawer connector – PF PWB (500-sheetx1) • PF PWB (500-sheetx1) – Drawer connector – Engine PWB
  4 Checking the PF lift motor PF lift motor is not attached properly or faulty. Reattach the PF lift motor. If it is not repaired, replace it.
  5 Checking the PF lift sensor The PF lift motor is not properly attached, or it is faulty. Reattach the PF lift sensor. If it is not repaired, replace it.
  6 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  7 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB for the paper feeder (500-sheetx1).
  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.

– Kyocera TASKalfa 308ci printer Error Codes and quick guide to troubleshooting:

• Code: C1800
• Description: Paper Feeder communication error
  Target: Paper feeder (500-sheet x 1)
• Causes: The communication error was detected 10 times continuously.
• Remedy: 1 Reinstalling the paper feeder The paper feeder is not properly installed. Reinstall the paper feeder.
  2 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – Engine PWB
  3 Replacing the PF PWB The PF PWB is faulty. Replace the PF 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.

• Code: C1810
• Description: Paper Feeder communication error
  Target: Paper feeder (500-sheet x 2), large capacity feeder (2,000-sheet)
• Causes: The communication error was detected 10 times continuously.
• Remedy: 1 Reinstalling the paper feeder The paper feeder is not properly installed. Reinstall the paper feeder.
  2 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – PF PWB (500-sheetx1) • PF PWB (500-sheetx1) – Drawer connector – Engine PWB
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  5 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB for the paper feeder (500-sheetx1).
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C1900
• Description: Paper Feeder EEPROM error
  Target: Paper feeder (500-sheet x 1) For the internal count
• Causes: The writing data and the reading data mismatch 3 times continuously when writing.
• Remedy: 1 Reinstalling the paper feeder The paper feeder is not properly installed. Reinstall the paper feeder.
  2 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – Engine PWB
  3 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.

• Code: C1910
• Description: Paper feeder EEPROM error
  Target: Paper feeder (500-sheet x 2), large capacity feeder (2,000-sheet) For the internal count
• Causes: The writing data and the reading data mismatch 4 times continuously when writing.
• Remedy: 1 Reinstalling the paper feeder The paper feeder is not properly installed. Reinstall the paper feeder.
  2 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – PF PWB (500-sheetx1)
  3 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  4 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB for the paper feeder (500-sheetx1).

• Code: C2101
• Description: Developer motor K error
• Causes: The steady signal turns off for 2s continuously after developer motor K is stabilized.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the developer unit drive gear if it is faulty.
  2 Replacing the developer unit The developer roller does not rotate correctly. Check if the developer roller rotates. If not, replace developer unit K.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed] to check if the developer motor K drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer motor K – Engine PWB
  5 Checking developer motor K Developer motor K is faulty. Reattach developer motor K. 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: C2102
• Description: Developer motor C/M/Y steady-state error
• Causes: The steady signal turns off for 1s continuously after developer motor C/M/Y started up.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the developer unit drive gear if it is faulty.
  2 Replacing the developer unit The developer roller does not rotate correctly. Replace developer unit C, M or Y if the developer roller does not rotate.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [DLP(CMY)] to check if the developer motor C/M/Y drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer motor C/M/Y – Engine PWB
  5 Checking developer motor C/ M/Y Developer motor C/M/Y is faulty. Reattach developer motor C/M/Y. 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: C2112
• Description: Developer motor C/M/Y startup error
• Causes: The steady signal does not turns on for 2s continuously after developer motor C/M/Y started up.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the developer unit drive gear if it is faulty.
  2 Replacing the developer unit The developer roller does not rotate correctly. Replace developer unit C, M or Y if the developer roller does not rotate.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [DLP(CMY)] to check if the developer motor C/M/Y drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer motor C/M/Y – Engine PWB
  5 Checking developer motor C/ M/Y Developer motor C/M/Y is not attached properly, or it is faulty. Reattach developer motor C/M/Y. If not repaired, replace it.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version.
  7 Checking the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2201
• Description: Drum motor K steady-state error
• Causes: The steady signal turns off for 1s continuously after drum motor K is stabilized.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the gears driving the drum unit if they are faulty.
  2 Replacing the drum unit The drum does not rotate smoothly. Check if the drum or the drum screw is rotated, and replace drum unit K if not rotated.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed] to check if the drum motor K drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected 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 – Engine PWB
  5 Checking drum motor K Drum motor K is not properly attached, or it is faulty. Reattach drum motor K. 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: C2202
• Description: Drum motor C/M/Y steady-state error
• Causes: The steady signal turns off for 1s continuously after drum motor C/M/Y started up.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the gears driving the drum unit if they are faulty.
  2 Replacing the drum unit The drum does not rotate smoothly. Check if the drum or the drum screw is rotated, and replace drum unit C/M/Y if not rotated.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed] to check if the drum motor CMY drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected 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 C/M/Y – Engine PWB
  5 Checking drum motor C/M/Y Drum motor C/M/Y is not properly attached, or it is faulty. Reattach drum motor C/M/Y. 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: C2211
• Description: Drum motor K startup error
• Causes: The drum motor K is not in the steady state when passing 2s after the drive start.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the gears driving the drum unit if they are faulty.
  2 Replacing the drum unit The drum does not rotate smoothly. Check if the drum or the drum screw is rotated, and replace drum unit K if not rotated.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed] to check if the drum motor K drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected 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 – Engine PWB
  5 Checking drum motor K Drum motor K is not properly attached, or it is faulty. Reattach drum motor K. 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: C2211
• Description: Drum motor C/M/Y startup error
• Causes: The drum motor C/M/Y is not in the steady state when passing 2s after the drive start.
• Remedy: 1 Replacing the gear The gear does not rotate correctly. Replace the gears driving the drum unit if they are faulty.
  2 Replacing the drum unit The drum does not rotate smoothly. Check if the drum or the drum screw is rotated, and replace drum unit C/M/Y if not rotated.
  3 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed] to check if the drum motor CMY drive gear rotates or has excessive load. Apply grease and repair the parts.
  4 Checking the connection The connector is not properly connected 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 C/M/Y – Engine PWB
  5 Checking drum motor C/M/Y Drum motor C/M/Y is not properly attached, or it is faulty. Reattach drum motor C/M/Y. 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: C2500
• Description: Feed motor error
• Causes: 1.The ready signal does not turn on when passing 2s after starting the feed motor drive.
  2. The ready signal does not turn on for 1s continuously after the feed motor is in the steady state.
• Remedy: 1 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Feed]. Check if the feed roller or drive gear rotates or has an excessive load. Apply grease and repair the parts.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Feed motor – Engine PWB
  3 Checking the feed motor The feed motor is not attached properly, or it is faulty. Reattach the feed motor. If not repaired, replace it.
  4 Replacing the feed drive unit Parts in the feed drive unit are faulty. Replace feed drive unit.
  5 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2600
• Description: PF feed motor error
  Target: Paper feeder (500-sheet x 1)
• Causes: The ready signal does not turn on when passing 2s after starting up the PF feed motor.
• Remedy: 1 Checking the driving parts The drive parts do not operate correctly. Select U247 [PF] > [Motor] > [On] and execute it. Check if the PF feed roller or drive gear rotates correctly or has an excessive load. Apply grease and repaired the parts.
  2 Checking the connection The connector is not properly connected 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
  3 Checking the connection The paper feeder is not properly connected to the main unit, or the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – Engine PWB
  4 Checking the PF feed motor The PF feed motor is not attached properly, or it is faulty. Reattach the PF feed motor. If not repaired, replace it.
  5 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  6 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2610
• Description: PF feed motor error
  Target: Paper feeder (500-sheet x 2), large capacity feeder (2,000-sheet)
• Causes: The ready signal does not turn on when passing 2s after starting up the PF feed motor.
• Remedy: 1 Checking the driving parts The drive parts do not operate correctly. Select U247 [2PF] or [LCF] > [Motor] > [On] and execute it. Check if the PF feed roller or drive gear rotates correctly or has an excessive load. Apply grease and repaired the parts.
  2 Checking the connection The connector is not properly connected 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
  3 Reinstalling the paper feeder The paper feeder is not properly installed. Reinstall the paper feeder.
  4 Checking the connection The connector is not connected properly or, the wire or drawer connector is faulty. Check the following wire connection, and correct the terminals and reconnect the connectors all the way. If the wire has no continuity or the drawer connector is faulty, replace them. • PF PWB – Drawer connector – PF PWB (500-sheetx1) • PF PWB (500-sheetx1) – Drawer connector – Engine PWB
  5 Checking the PF feed motor The PF feed motor is not attached properly, or it is faulty. Reattach the PF feed motor. If not repaired, replace it.
  6 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  7 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB.
  8 Replacing the PF PWB The PF PWB is faulty. Replace the PF PWB for the paper feeder (500-sheetx1).
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2700
• Description: Full-color release error
• Causes: The position signal does not change when passing 2s while the transfer belt release is changed.
• Remedy: 1 Checking the driving parts The drive parts do not operate correctly. Execute U030 [Belt Release]. Check if the drive gear rotates or has an excessive load. Apply grease and repair the parts.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • TC belt release sensor 1, 2 – Engine PWB • Transfer release motor – Engine PWB
  3 Checking the TC belt release sensor The TC belt release sensor comes off, or it is faulty. Reattach TC belt release sensor 1, 2. If not repaired, replace them.
  4 Checking the transfer release motor The transfer release motor is not attached properly, or it is faulty. Reattach the transfer release motor. If not repaired, replace it.
  5 Replacing the primary transfer unit The lift drive of the primary transfer roller is faulty. Replace the primary transfer unit.
  6 Firmware upgrade The engine 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.

• Code: C2760
• Description: Transfer motor startup error
• Causes: The ready signal does not turn on when passing 2s after starting up the motor.
• Remedy: 1 Checking the driving parts The transfer motor drive parts are faulty. Execute U030 [Feed]. Check if the drive gear rotates or has an excessive load. Apply grease and repair the parts.
  2 Replacing the primary transfer unit The primary transfer unit drive parts are faulty, or the transfer belt is faulty. Replace the primary transfer unit when the primary transfer unit drive parts are faulty or the transfer belt does not rotate correctly.
  3 Checking the connection The connector is not properly connected 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 motor – Engine PWB
  4 Replacing the transfer motor The transfer motor is faulty. Reattach the transfer motor. If not repaired, replace it.
  5 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C2820
• Description: Transfer motor steady-state error
• Causes: The steady state signal is off for 1s continuously after the transfer motor is in the steady state.
• Remedy: 1 Checking the driving parts The drive transmission from the transfer motor is faulty. Execute U030 [Feed]. Check if the drive gear rotates or has an excessive load. Apply grease and repair the parts.
  2 Replacing the primary transfer unit The primary transfer unit drive parts are faulty, or the transfer belt is faulty. Replace the primary transfer unit when the primary transfer unit drive parts are faulty or the transfer belt does not rotate correctly.
  3 Checking the connection The connector is not properly connected 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 motor – Engine PWB
  4 Replacing the transfer motor The transfer motor is faulty. Reattach the transfer motor. If not repaired, replace it.
  5 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C3100
• Description: Carriage error
• Causes: The position of the home position sensor (turning on / off) mismatches when turning the main power on or finishing the original scan by the scanner.
• Remedy: 1 Checking the scanner movement A load is applied to the scanner movement. If there is an excessive load to the scanner movement when manually shifting the scanner carriage, check if foreign material is on the scanner drive belt. Then, clean the scanner drive belt and apply the grease to the ISU shaft.
  2 Checking the tension of the drive belt A load is applied to the scanner movement since the drive belt tension is improper. Adjust the drive belt tension properly.
  3 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and reconnect the FFC. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • Home position sensor – CCD PWB • Scanner motor – Engine PWB • CCD PWB – Main PWB • Main PWB – Engine PWB
  4 Checking the home position sensor The home position sensor is not properly attached, or it is faulty. Reattach the home position sensor. If not repaired, replace it.
  5 Checking the scanner motor The scanner motor is not attached properly or faulty. Reattach the scanner motor. If not repaired, replace it.
  6 Checking the scanner carriage The CCD PWB is faulty. Replace the scanner carriage and execute U411.
  7 Firmware upgrade The firmware is faulty. Upgrade the engine firmware to the latest version.
  8 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C3200
• Description: LED lamp startup error
• Causes: The white reference data retrieved by lighting the lamp at the initial operation is at the specified value or less.
• Remedy: 1 Checking the LED lamp The LED lamp does not light. Execute U061 [CCD] to check the LED lamps light. If not, replace the scanner carriage and execute U411.
  2 Checking the connection The connector is not properly connected 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. • LED PWB – CCD PWB
  3 Checking the connection FFC is not properly connected, or it is faulty. Reconnect the following FFC. When the FFC terminals are peeled off, deformed or the FFC is broken, replace the FFC. • CCD PWB – Main PWB
  4 Replacing the scanner carriage The CCD PWB is faulty. Replace the scanner carriage and execute U411.
  5 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  6 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C3300
• Description: CCD AGC error
• Causes: The brightness of the LED lamps is darker or brighter than anticipated when executing the AGC process for the CCD lamp.
• Remedy: 1 Checking the LED lamp 1 LED lamp is broken. Execute U061 [CCD] to check the LED lamps light. If not, replace the scanner carriage and execute U411.
  2 Cleaning the backside of the contact glass The white reference sheet is dirty. Clean the contact glass backside. 2017/11/21
  3 Checking the connection The connector is not properly connected 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. • LED PWB – CCD PWB
  4 Checking the connection FFC is not properly connected, or it is faulty. Reconnect the following FFC. When the FFC terminals are peeled off, deformed or the FFC is broken, replace the FFC. • CCD PWB – Main PWB
  5 Replacing the scanner carriage The CCD PWB is faulty. Replace the scanner carriage and execute U411.
  6 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  7 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C3500
• Description: Communication error between the scanner and the ASIC
• Causes: The communication error was detected during the communication between the scanner ASIC and the engine CPU.
• Remedy: 1 Checking the connection FFC is not properly connected, or it is faulty. Reconnect the following FFC. When the FFC terminals are peeled off, deformed or the FFC is broken, replace the FFC. • CCD PWB – Main PWB
  2 Replacing the scanner carriage The CCD PWB is faulty. Replace the scanner carriage and execute U411.
  3 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C3800
• Description: AFE error
• Causes: The writing data and the reading data mismatch 3 times continuously when writing. The response from AFE is not returned for 100ms.
• Remedy: 1 Checking the connection FFC is not properly connected, or it is faulty. Reconnect the following FFC. When the FFC terminals are peeled off, deformed or the FFC is broken, replace the FFC. • CCD PWB – Main PWB
  2 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  3 Replacing the scanner carriage The CCD PWB is faulty. Replace the scanner carriage and execute U411.

• Code: C4001
• Description: Polygon motor startup error
• Causes: The polygon motor is not in the steady state for 15s or more after start-up
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • LSU (Polygon motor) – 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 speed is not stable when passing 15s after the polygon motor is in the steady state.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • LSU (Polygon motor) – 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 K
• Causes: A BD signal is not detected within 1s after the polygon motor drive starts.
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU The LSU is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C4102
• Description: BD initialization error C
• Causes: A BD signal is not detected within 1s after the polygon motor drive starts.
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU The LSU is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C4103
• Description: BD initialization error M
• Causes: A BD signal is not detected within 1s after the polygon motor drive starts.
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU The LSU is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C4104
• Description: BD initialization error Y
• Causes: A BD signal is not detected within 1s after the polygon motor drive starts.
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU The LSU is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C4201
• Description: BD steady-state error
• Causes: The BD signal is not detected during the laser lighting.
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU The LSU is faulty. Replace the LSU.
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the main PWB The main PWB is faulty. Replace the main PWB.

• Code: C4600
• Description: LSU cleaning motor error
• Causes: 1. The LSU cleaning motor operation time is shorter than the specified time.
  2. The LSU cleaning parts continue shifting in the same direction for the specified time or more.
• Remedy: 1 Cleaning the LSU 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.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • LSU cleaning motor – Engine PWB
  3 Checking the LSU cleaning motor The LSU cleaning motor is not properly attached, or it is faulty. Reattach the LSU cleaning motor. If not repaired, replace it.
  4 Replacing the LSU The LSU cleaning drive gear, cleaning wire or the cleaning pad are deformed, or they are faulty. Replace the LSU.
  5 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C4700
• Description: VIDEO ASIC device error
• Causes: 1. The communication with VIDEO ASIC failed 5 times continuously.
  2. After writing the data to VIDEO ASIC, the value mismatching error repeated 8 times continuously by trying to read the data from the same address.
• Remedy: 1 Resetting the main power The ASIC operation on the PWB is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected. Reinsert the connectors on the engine PWB all the way.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the main firmware and the engine firmware to the latest version.
  4 Checking the engine PWB The connector and FFC are not connected properly or the wire, FFC or 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.
  5 Checking the main PWB The connector and FFC are not connected properly or the wire, FFC or 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: C5101
• Description: Main high voltage error BK
• Causes: The inflow electric current K detected is less than the specified value during the Vpp adjustment.
• Remedy: 1 Checking the drum 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. 2017/11/21
  2 Checking the drum motor The drum motor does not properly rotate due to the excessive load. Execute U030 [Feed] and check the drum motor K rotation. If it does not rotate correctly, replace it. 2017/11/21
  3 Checking the main charger unit The proper voltage is not applied since foreign material is adhering on the highvoltage contact of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  4 Replacing the main charger unit The proper voltage is not applied since the high-voltage contact of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  5 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • High voltage PWB – Engine PWB
  6 Replacing the high voltage PWB The high voltage PWB is faulty. Replace the high voltage PWB.
  7 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  8 Checking the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C5102
• Description: Main high-voltage error C
• Causes: The inflow electric current C detected is less than the specified value during the Vpp adjustment.
• Remedy: 1 Checking the drum 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.
  2 Checking the drum motor The drum motor does not properly rotate due to the excessive load. Execute U030 [Feed] and check the drum motor C/M/Y rotation. If it does not rotate correctly, replace it.
  3 Checking the main charger unit The proper voltage is not applied since foreign material is adhering on the highvoltage contact of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  4 Replacing the main charger unit The proper voltage is not applied since the high-voltage contact of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  5 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • High voltage PWB – Engine PWB
  6 Replacing the high voltage PWB The high voltage PWB is faulty. Replace the high voltage 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: C5103
• Description: Main high-voltage error M
• Causes: The inflow electric current M detected is less than the specified value during the Vpp adjustment.
• Remedy: 1 Checking the drum 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.
  2 Checking the drum motor The drum motor does not properly rotate due to the excessive load. Execute U030 [Feed] and check the drum motor C/M/Y rotation. If it does not rotate correctly, replace it.
  3 Checking the main charger unit The proper voltage is not applied since foreign material is adhering on the highvoltage contact of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  4 Replacing the main charger unit The proper voltage is not applied since the high-voltage contact of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  5 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • High voltage PWB – Engine PWB
  6 Replacing the high voltage PWB The high voltage PWB is faulty. Replace the high voltage 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: C5104
• Description: Main high-voltage error Y
• Causes: The inflow electric current Y detected is less than the specified value during the Vpp adjustment.
• Remedy: 1 Checking the drum 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.
  2 Checking the drum motor The drum motor does not properly rotate due to the excessive load. Execute U030 [Feed] and check the drum motor C/M/Y rotation. If it does not rotate correctly, replace it.
  3 Checking the main charger unit The proper voltage is not applied since foreign material is adhering on the highvoltage contact of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft.
  4 Replacing the main charger unit The proper voltage is not applied since the high-voltage contact of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930.
  5 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • High voltage PWB – Engine PWB
  6 Replacing the high voltage PWB The high voltage PWB is faulty. Replace the high voltage 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: C6000
• Description: Fuser main heater broken
• Causes: The temperature detected by fuser thermistor 1 (center) does not reach 100 °C / 212 °F in 20s during warm-up. The temperature detected by thermistor 1 (center) does not reach the ready display temperature in 30s after reaching 100 °C / 212 °F
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  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 properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine PWB
  4 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  5 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB when the fuser heaters always turn on.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6020
• Description: Fuser thermistor 1 high temperature error
• Causes: Fuser thermistor 1 (center thermistor) detects 240°C / 464°F or more for 1s or more.
• Remedy: 1 Reinstalling the fuser unit The drawer connector of the fuser unit is not inserted securely. Reinstall the fuser unit so that the drawer connector is connected securely.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB
  3 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  4 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6030
• Description: Broken fuser thermistor 1 error
• Causes: Fuser thermistor 1 (center) detected low temperature for 1.6s when fuser thermistor 2 (edge) detected 30°C / 86°F or more.
• Remedy: Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  2 Checking the drawer connector The terminals of the drawer connectors between the main unit and the fuser unit have foreign material or are deformed. Clean, or correct the terminals of the drawer connector at the fuser unit, and reconnect them.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB
  4 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  5 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6040
• Description: Fuser main heater error
• Causes: 1. Fuser thermistor 1 (center) input an abnormal value for 1s continuously.
  The fuser unit detection port was at H level during all the operation mode.
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine PWB
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  5 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB when the fuser heaters always turn on.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6050
• Description: Fuser thermistor 1 low temperature error
• Causes: Fuser thermistor 1 (center) detected 100 °C / 212 °F or less for 1s during standby or printing.
  Fuser thermistor 1 (center) detected 70°C / 158°F or less for 1s during low power mode.
• Remedy: 1 Checking the power supply voltage The power supply voltage reduces. 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 a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine PWB
  4 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  5 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  6 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB when the fuser heaters always turn on.
  7 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6200
• Description: Fuser sub heater error
• Causes: 1. The temperature detected by the thermistor does not reach 100 °C / 212 °F after turning the fuser heater on for 30s continuously during warm-up.
  2. The temperature detected by the thermistor does not reach the specified value when turning the fuser heater on for 30s continuously after the temperature detected by the thermistor reaches 100 °C / 212 °F.
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine PWB
  3 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  4 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  5 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB when the fuser heaters always turn on.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6220
• Description: Fuser sub heater high temperature error
• Causes: Fuser thermistor 2 (edge thermistor) detects 240°C / 464°F or more for 1s.
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  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 properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine PWB
  4 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  5 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB when the fuser heaters always turn on.
  6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6230
• Description: Broken fuser thermistor 2 error
• Causes: Fuser thermistor 2 (edge thermistor) detects low temperature for 1.6s.
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB
  3 Replacing the fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. 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 engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6250
• Description: Fuser thermistor 2 low temperature error
• Causes: 1.Fuser thermistor 2 (edge) detected 100 °C / 212 °F or less for 1s during standby or printing.
  Fuser thermistor 2 (edge) detected 60°C/140°F or less for 1s.
• Remedy: 1 Checking the power supply voltage The power supply voltage reduces. 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 a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser unit – Engine PWB • Low voltage PWB – Engine 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 fuser unit The fuser thermistor cannot detect normal temperature due to abnormal part in the fuser unit. Replace the fuser unit.
  7 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB.

• Code: C6400
• Description: Zero-cross signal error
• Causes: The zero-cross signal is not input for 1s continuously when the fusers heater turns on.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Low voltage PWB – Engine PWB
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version.
  3 Checking the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB.
  4 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6610
• Description: Fuser press-release sensor error
• Causes: 1. The fuser press-release sensor does not turn on after passing 10s since the fuser motor rotated in the counter direction when the sensor turned off.
  2. The fuser press-release sensor does not turn off after passing 10s since the fuser motor rotated in the counter direction when the sensor turned on.
• Remedy: 1 Removing a piece of paper The fuser thermistor cannot detect normal temperature since paper tip resides in the fuser unit. Remove a piece of paper remaining in the fuser unit.
  2 Checking the fuser pressrelease operation The fuser press-release does not operate properly. Check if the pressure can be reduced by reverse-rotating the fuser gear
  3 Checking the fuser pressrelease sensor The fuser press-release sensor is not properly attached. Check if the fuser press-release sensor is interrupted by the actuator at the fuser pressure decrease operation. If it is not interrupted, reattach the parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Fuser press-release sensor – Engine PWB • Fuser motor – Engine PWB
  5 Replacing the fuser motor The fuser motor is faulty. Execute U030 [Fuser]. If the fuser motor does not operate correctly, replace it.
  6 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version.
  7 Replacing the fuser unit The internal parts of the fuser unit such as the fuser pressrelease sensor are faulty. Replace the fuser unit.
  8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C6910
• Description: Engine firmware unexpected error
• Causes: 1. The main charge, developer or transfer bias was impressed when the drum was stopped.
  2. The developer bias on was detected 3340ms or more when the main charge was off.
  3. Fuser thermistor 1 (center) or fuser thermistor 2 (edge) detected 240°C/464°F or more for 1.2s.
• Remedy: 1 Resetting the main power The power startup delays. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Refixing the engine PWB The engine PWB is not properly attached and grounding is not secured. Retighten the fixing screws of the engine PWB.
  3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version.
  4 Checking the engine PWB The connector and FFC are not connected properly or the wire, FFC or 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: C7001
• Description: Toner motor K error
• Causes: ‘Shake the toner container.’ appears if the container rotation detection pulse signal does not change for 500ms continuously when turning the toner motor on. properly, this message disappears by opening and closing the front cover. If the container rotation detection pulse signal does not change after repeating that operation 3 times, the service call error appears 3rd time.
• Remedy: 1 Replacing the toner container The spiral locks up (it does not rotate). Replace toner container K if the spiral of the toner container cannot be rotated manually.
  2 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Check if the coupling or the gears are not damaged. If damaged, replace the parts.
  3 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Toner motor K – Engine PWB
  5 Checking the toner supply drive unit The toner supply drive unit is not attached properly, or the drive parts are faulty. Reattach the toner supply drive unit. If not repaired, replace it.
  6 Checking toner motor K Toner motor K is faulty. Reattach toner motor K. If not repaired, replace it.
  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: C7002
• Description: Toner motor C error
• Causes: ‘Shake the toner container.’ appears if the container rotation detection pulse signal does not change for 500ms continuously when turning the toner motor on. properly, this message disappears by opening and closing the front cover. If the container rotation detection pulse signal does not change after repeating that operation 3 times, the service call error appears 3rd time.
• Remedy: 1 Replacing the toner container The spiral locks up (it does not rotate). Replace toner container C if the spiral in the toner container cannot be rotated manually.
  2 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Check if the coupling or the gears are not damaged. If damaged, replace the parts.
  3 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Toner motor C – Engine PWB
  5 Checking the toner supply drive unit The toner supply drive unit is not attached properly, or the drive parts are faulty. Reattach the toner supply drive unit. If not repaired, replace it.
  6 Checking toner motor C Toner motor C is faulty. Reattach toner motor C. If not repaired, replace it.
  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: C7003
• Description: Toner motor M error
• Causes: ‘Shake the toner container.’ appears if the container rotation detection pulse signal does not change for 500ms continuously when turning the toner motor on. Properly, this message disappears by opening and closing the front cover. If the container rotation detection pulse signal does not change after repeating that operation 3 times, the service call error appears 3rd time.
• Remedy: 1 Replacing the toner container The spiral locks up (it does not rotate). Replace toner container M if the spiral in the toner container cannot be rotated manually.
  2 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Check if the coupling or the gears are not damaged. If damaged, replace the parts.
  3 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Toner motor M – Engine PWB
  5 Checking the toner supply drive unit The toner supply drive unit is not attached properly, or the drive parts are faulty. Reattach the toner supply drive unit. If not repaired, replace it.
  6 Checking toner motor M Toner motor M is faulty. Reattach toner motor M. If not repaired, replace it.
  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: C7004
• Description: Toner motor Y error
• Causes: ‘Shake the toner container.’ appears if the container rotation detection pulse signal does not change for 500ms continuously when turning the toner motor on. properly, this message disappears by opening and closing the front cover. If the container rotation detection pulse signal does not change after repeating that operation 3 times, the service call error appears 3rd time.
• Remedy: 1 Replacing the toner container The spiral locks up (it does not rotate). Replace toner container Y if the spiral in the toner container cannot be rotated manually.
  2 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Check if the coupling or the gears are not damaged. If damaged, replace the parts.
  3 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  4 Checking the connection The connector is not properly connected 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 Y – Engine PWB
  5 Checking the toner supply drive unit The toner supply drive unit is not attached properly, or the drive parts are faulty. Reattach the toner supply drive unit. If not repaired, replace it.
  6 Checking toner motor Y Toner motor Y is faulty. Reattach toner motor Y. If not repaired, replace it.
  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: C7101
• Description: Toner sensor K error
• Causes: The sensor output value is at the specified value or less, or more for a certain time.
• Remedy: 1 Reinstalling the toner container The toner container is not properly installed. Reinstall toner container BK.
  2 Replacing the toner container The toner supply opening of the toner container cannot open. Replace toner container BK.
  3 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gear and the coupling and apply the grease to them.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB • Toner motor K – Engine PWB
  5 Replacing developer unit K The gear or spiral does not rotate in the developer unit, or toner sensor K is faulty. Replace developer unit K.
  6 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  7 Checking toner motor K Toner motor K is not properly attached, or it is faulty. Reattach toner motor K. If not repaired, replace it.
  8 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7102
• Description: Toner sensor C error
• Causes: The sensor output value is at the specified value or less, or more for a certain time.
• Remedy: 1 Reinstalling the toner container The toner container is not properly installed. Reinstall toner container C.
  2 Replacing the toner container The toner supply opening of the toner container cannot open. Replace toner container C.
  3 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gear and the coupling and apply the grease to them.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit C into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit C – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB • Toner motor C – Engine PWB
  5 Replacing developer unit C The gear or spiral does not rotate in the developer unit, or toner sensor C is faulty. Replace the developer unit C.
  6 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  7 Checking toner motor C Toner motor C is not properly attached, or it is faulty. Reattach toner motor C. If not repaired, replace it.
  8 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7103
• Description: Toner sensor M error
• Causes: The sensor output value is at the specified value or less, or more for a certain time.
• Remedy: 1 Reinstalling the toner container The toner container is not properly installed. Reinstall toner container M.
  2 Replacing the toner container The toner supply opening of the toner container cannot open. Replace toner container M.
  3 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gear and the coupling and apply the grease to them.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit M into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit M – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB • Toner motor M – Engine PWB
  5 Replacing developer unit M The gear or spiral does not rotate in the developer unit, or toner sensor M is faulty. Replace the developer unit M.
  6 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  7 Checking toner motor M Toner motor M is not properly attached, or it is faulty. Reattach toner motor M. If not repaired, replace it.
  8 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7104
• Description: Toner sensor Y error
• Causes: The sensor output value is at the specified value or less, or more for a certain time.
• Remedy: 1 Reinstalling the toner container The toner container is not properly installed. Reinstall toner container Y.
  2 Replacing the toner container The toner supply opening of the toner container cannot open. Replace toner container Y.
  3 Checking the toner container drive parts The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gear and the coupling and apply the grease to them.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit Y into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit Y – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB • Toner motor Y – Engine PWB
  5 Replacing developer unit Y The gear or spiral does not rotate in the developer unit, or toner sensor Y is faulty. Replace the developer unit Y.
  6 Checking the toner supply drive unit The drive gear or the coupling do not properly rotate or the excessive load is applied to them. Clean the drive gears and the couplings in the toner supply drive unit, and apply the grease to these parts.
  7 Checking toner motor Y Toner motor Y is not properly attached, or it is faulty. Reattach toner motor Y. If not repaired, replace it.
  8 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7200
• Description: Internal thermistor error (Developer)
• Causes: The input sampling value of the sensor is more than the reference value. (It is controlled by 25°C / 77°F after detection.)
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Replacing developer unit K The toner sensor (internal thermistor) is faulty. Replace developer unit K.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7210
• Description: Inner thermistor short-circuited (developer)
• Causes: The input sampling value of the sensor is at the reference value or less.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Replacing developer unit K The toner sensor (internal thermistor) is faulty. Replace developer unit K.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7221
• Description: Broken LSU thermistor error
• Causes: The input sampling value of the LSU thermistor is more than the reference value
• Remedy: 1 Checking the connection The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU 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 main PWB The main PWB is faulty. Replace the main 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 The connector or FFC is not connected properly. Or, the wire or FFC is faulty. Reconnect the following wire connectors and clean the FFC and reconnect. If there is no continuity, replace the wire. If the FFC terminal section is deformed or FFC is broken, replace the FFC. • LSU – Main PWB
  2 Replacing the LSU 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 main PWB The main PWB is faulty. Replace the main PWB.

• Code: C7401
• Description: Developer unit K type mismatch error
• Causes: Developer unit K does not conform with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking developer unit K The different type of the developer unit is installed. Install the correct developer unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7402
• Description: Developer unit C type mismatch error
• Causes: Developer unit C mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit C into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit C – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking developer unit C The different type of the developer unit is installed. Install the correct developer unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7403
• Description: Developer unit M type mismatch error
• Causes: Developer unit M mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit M into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit M – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking developer unit M The different type of the developer unit is installed. Install the correct developer unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7404
• Description: Developer unit Y type mismatch error
• Causes: Developer unit Y mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit Y into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit Y – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking developer unit Y The different type of the developer unit is installed. Install the correct developer unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7411
• Description: Drum unit K type mismatch error
• Causes: The main unit and drum unit K mismatch.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking drum unit K The different drum unit is installed. Install the proper drum unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7412
• Description: Drum unit C type mismatch error
• Causes: Drum unit C mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit C into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit C – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking drum unit C The different drum unit is installed. Install the proper drum unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7413
• Description: Drum unit M type mismatch error
• Causes: Drum unit M mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit M into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit M – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking drum unit M The different drum unit is installed. Install the proper drum unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7414
• Description: Drum unit Y type mismatch error
• Causes: Drum unit Y mismatches with the main unit.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit Y into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit Y – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  2 Checking drum unit Y The different drum unit is installed. Install the proper drum unit.
  3 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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.

• Code: C7601
• Description: Front ID sensor error
• Causes: The sensor output value is out of the specified range.
• 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. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Front ID sensor – Engine PWB
  4 Checking the front ID sensor The front ID sensor is not attached properly, or it is faulty. Reattach the front ID sensor and execute U464 [Calib] > [Full]. If an error is detected, replace it.
  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: C7602
• Description: Rear ID sensor error
• Causes: The sensor output value is out of the specified range.
• 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. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Rear ID sensor – Engine PWB
  4 Checking the rear ID sensor The rear ID sensor is not attached properly, or it is faulty. Reattach the rear ID sensor and execute U464 [Calib] > [Full]. If an error is detected, replace it.
  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: C7611
• Description: Bias calibration read value error BK
• Causes: The ID sensor cannot read the patch image density on the transfer belt normally when executing Calibration.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the ID sensor shutter The ID sensor shutter is not opened. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Cleaning the ID sensors The ID sensor is dirty. Clean the ID sensor surface.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • ID sensors – Engine PWB
  5 Executing Calibration The last calibration failed. Execute [Calibration] at [Adjustment/ Maintenance] in the System Menu.
  6 Cleaning the transfer belt The transfer belt surface is dirty. (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, clean the transfer belt surface.
  7 Replacing the primary transfer unit The transfer belt surface is dirty. not (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, replace the primary transfer unit.
  8 (When the print is too light) Cleaning or replacing the drum unit / developer unit / LSU The parts in the drum unit, developer unit or the LSU are dirty or worn down. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  9 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  10 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7612
• Description: Bias calibration read value error C
• Causes: The ID sensor cannot read the patch image density on the transfer belt normally when executing Calibration.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the ID sensor shutter The ID sensor shutter is not opened. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Cleaning the ID sensors The ID sensor is dirty. Clean the ID sensor surface.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • ID sensors – Engine PWB
  5 Executing Calibration The last calibration failed. Execute [Calibration] at [Adjustment/ Maintenance] in the System Menu.
  6 Cleaning the transfer belt The transfer belt surface is dirty. (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, clean the transfer belt surface.
  7 Replacing the primary transfer unit The transfer belt surface is dirty. not (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, replace the primary transfer unit.
  8 (When the print is too light) Cleaning or replacing the drum unit / developer unit / LSU The parts in the drum unit, developer unit or the LSU are dirty or worn down. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  9 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  10 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7613
• Description: Bias calibration read value error M
• Causes: The ID sensor cannot read the patch image density on the transfer belt normally when executing Calibration.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the ID sensor shutter The ID sensor shutter is not opened. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Cleaning the ID sensors The ID sensor is dirty. Clean the ID sensor surface.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • ID sensors – Engine PWB
  5 Executing Calibration The last calibration failed. Execute [Calibration] at [Adjustment/ Maintenance] in the System Menu.
  6 Cleaning the transfer belt The transfer belt surface is dirty. (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, clean the transfer belt surface.
  7 Replacing the primary transfer unit The transfer belt surface is dirty. not (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, replace the primary transfer unit.
  8 (When the print is too light) Cleaning or replacing the drum unit / developer unit / LSU The parts in the drum unit, developer unit or the LSU are dirty or worn down. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  9 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  10 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7614
• Description: Bias calibration read value error Y
• Causes: The ID sensor cannot read the patch image density on the transfer belt normally when executing Calibration.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the ID sensor shutter The ID sensor shutter is not opened. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Cleaning the ID sensors The ID sensor is dirty. Clean the ID sensor surface.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • ID sensors – Engine PWB
  5 Executing Calibration The last calibration failed. Execute [Calibration] at [Adjustment/ Maintenance] in the System Menu.
  6 Cleaning the transfer belt The transfer belt surface is dirty. (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, clean the transfer belt surface.
  7 Replacing the primary transfer unit The transfer belt surface is dirty. not (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, replace the primary transfer unit.
  8 (When the print is too light) Cleaning or replacing the drum unit / developer unit / LSU The parts in the drum unit, developer unit or the LSU are dirty or worn down. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  9 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  10 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB.

• Code: C7620
• Description: Automatic color registration failure
• Causes: 1. The patch print position on the transfer belt is not within the readable area by the ID sensors.
  2. The transfer belt surface is dirty, or the patch print density is too light.
• Remedy: 1 Resetting the main power The ID sensor does not operate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the ID sensor shutter The ID sensor shutter is not opened. Open the right cover and open/close the front cover while the primary transfer unit is detached to check if the ID sensor shutter opens/closes (slides to the machine front and rear side). If not operating correctly, reattach it.
  3 Cleaning the ID sensors The ID sensor is dirty. Clean the ID sensor surface.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • ID sensors – Engine PWB
  5 Executing Calibration The last calibration failed. Execute [Calibration] at [Adjustment/ Maintenance] in the System Menu.
  6 Cleaning the transfer belt The transfer belt surface is dirty. (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, clean the transfer belt surface.
  7 Replacing the primary transfer unit The transfer belt surface is dirty. not (removable by cleaning) Check the service call log on the Event Log. If the service call repeatedly appears, replace the primary transfer unit.
  8 (When the print is too light) Cleaning or replacing the drum unit / developer unit / LSU The parts in the drum unit, developer unit or the LSU are dirty or worn down. In case if the image is too light, clean the drum unit, developer unit and the LSU. Or, replace them.
  9 (When the color registration occurs) Reinstalling the LSU and drum unit or replacing the LSU The LSU or drum unit is not attached to the proper position or the LSU is faulty, If the color registration shift occurs, attach the LSU and drum units to the regular position. If not repaired, replace the LSU.
  10 Firmware upgrade The firmware is not the latest version. Upgrade the firmware to the latest version.
  11 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 more than the reference value.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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 properly connected or the wire is faulty. Reinsert the following wire 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. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in drum unit K is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing the drum unit The EEPROM in drum unit K is faulty. Replace drum unit K.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7902
• Description: Drum unit C EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in drum unit C is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit C into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit C – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing the drum unit The EEPROM in drum unit C is faulty. Replace drum unit C.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7903
• Description: Drum unit M EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in drum unit M is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit M into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit M – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing the drum unit The EEPROM in drum unit M is faulty. Replace drum unit M.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7904
• Description: Drum unit Y EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in drum unit Y is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall drum unit Y into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Drum unit Y – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing the drum unit The EEPROM in drum unit Y is faulty. Replace drum unit Y.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7911
• Description: Developer unit K EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in developer unit K is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit K into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit K – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing developer unit K The EEPROM in developer unit K is faulty. Replace developer unit K.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7912
• Description: Developer unit C EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in developer unit C is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit C into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit C – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing developer unit C The EEPROM in developer unit C is faulty. Replace the developer unit C.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7913
• Description: Developer unit M EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in developer unit M is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit M into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit M – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing developer unit M The EEPROM in developer unit M is faulty. Replace the developer unit M.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C7914
• Description: Developer unit Y EEPROM error
• Causes: 1. No response from the device is detected for 5ms or more 5 times continuously when reading / writing the data.
  2. The reading data of 2 points mismatches 8 times continuously.
  3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Resetting the main power The EEPROM data in developer unit Y is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinstall developer unit Y into the main unit all the way to reconnect the connector. Also, reinsert the following wire connectors. If there is no continuity, replace the wire. • Developer unit Y – Drum/developer relay PWB • Drum/developer relay PWB – Engine PWB
  3 Replacing developer unit Y The EEPROM in developer unit Y is faulty. Replace the developer unit Y.
  4 Replacing the drum/developer relay PWB The drum/developer relay PWB is faulty. Replace the drum/developer relay 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: C8000
• Description: Incompatible finisher detection error
  Target: Inner finisher
• Causes: The main unit and the finisher are mismatched.
• Remedy: 1 Checking the finisher The finisher for other models is installed. Install the correct finisher.

• Code: C8090
• Description: DF paddle motor error
  Target: Inner finisher
• Causes: 1. DF puddle sensor does not turn on when passing 1s during the DF puddle motor drive.
  2. DF puddle sensor does not turn off when driving for 1s during the DF bundle eject sensor on.
• Remedy: 1 Checking the DF paddle drive parts The DF paddle drive parts are not attached properly, or they are faulty. Reattach the DF paddle drive parts. If not repaired, replace them.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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 correctly, replace it.
  4 Checking the DF paddle sensor The DF paddle sensor is not attached properly, or it is faulty. Reattach the DF paddle sensor and execute U241 [Finisher] > [Lead Paddle]. If it does not operate correctly, replace it.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8100
• Description: DF exit release motor error
  Target: Inner finisher
• Causes: 1. DF bundle sensor does not turn on when passing 1s during the DF eject release motor drive.
  2. DF bundle eject sensor does not turn off when driving during the DF bundle eject sensor on.
• Remedy: 1 Checking the DF bundle exit unit The exit 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 attached properly, 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 properly connected or the wire is faulty. Reinsert the following wire 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 exit release motor The DF exit release motor is faulty. Execute U240 [Motor] > [Eject Unlock]. If the DF exit release motor does not operate correctly, replace it.
  5 Checking the DF bundle exit sensor The DF bundle exit sensor is not attached properly, or it is faulty. Reattach the DF bundle exit sensor and execute U241 [Finisher] > [Bundle Eject HP]. If it does not operate correctly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8140
• Description: DF tray motor error 1
  Target: Inner finisher
• Causes: Change from DF paper holding sensor 1 or 2 turning on to off is not detected when passing 4s while ascending 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, adjust the position where stacks.
  2 Checking the DF main tray drive parts The DF main tray drive parts are not attached properly, or they are faulty. Reattach the DF main tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DF tray motor – DF PWB • DF paper holding sensor 1 – DF PWB • DF paper holding 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 correctly, replace it.
  5 Checking DF paper holding sensors 1, 2 DF paper holding sensor 1, 2 is not attached properly, or it is faulty. Reattach DF paper holding sensor 1, 2 and execute U241 [Finisher] > [Press Paper Up] or [Press Paper Down]. If it does not operate correctly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8160
• Description: DF tray motor error 3
  Target: Inner finisher
• Causes: DF tray sensor turning on is not detected when passing 4s while 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, adjust the position where stacks.
  2 Checking the DF main tray drive parts The DF main tray drive parts are not attached properly, or they are faulty. Reattach the DF main tray drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DF tray motor – DF PWB • DF tray sensor – 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 correctly, replace it.
  5 Checking the DF tray sensor The DF tray sensor is not attached properly, or it is faulty. Reattach the DF tray sensor and execute U241 [Finisher] > [Tray L-Limit]. If it does not operate correctly, 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)
  Target: Inner finisher
• Causes: The home position cannot be detected when passing 3s while returning 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 front DF side registration guide is not shifted manually, repair the part that restricts the operation.
  2 Checking the front DF side registration guide drive parts The front DF side registration guide drive parts are not attached properly, 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 properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DF side registration motor 1 – DF PWB • DF side registration sensor 1 – DF PWB
  4 Checking DF side registration motor 1 DF side registration motor 1 is faulty. Execute U240 [Motor] > [Width Test(A4R)] or [Width Test(LTR)]. If DF side registration motor 1 does not operate correctly, replace it.
  5 Checking DF side registration sensor 1 DF side registration sensor 1 is not attached properly, or it is faulty. Reattach DF side registration sensor 1 and execute U241 [Finisher] > [Width Front HP]. If it does not operate correctly, 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)
  Target: Inner finisher
• Causes: J6812 (Pre DF front width registration jam) is detected twice continuously.
• Remedy: 1 Checking the front DF side registration guide The front DF side registration guide is not assembled properly. If the front DF side registration guide is not shifted manually, repair the part that restricts the operation.
  2 Checking the front DF side registration guide drive parts The front DF side registration guide drive parts are not attached properly, 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 properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DF side registration motor 1 – DF PWB • DF side registration sensor 1 – DF PWB
  4 Checking DF side registration motor 1 DF side registration motor 1 is faulty. Execute U240 [Motor] > [Width Test(A4R)] or [Width Test(LTR)]. If DF side registration motor 1 does not operate correctly, replace it.
  5 Checking DF side registration sensor 1 DF side registration sensor 1 is not attached properly, or it is faulty. Reattach DF side registration sensor 1 and execute U241 [Finisher] > [Width Front HP]. If it does not operate correctly, replace it
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8190
• Description: DF side registration motor 2 error (1)
  Target: Inner finisher
• Causes: The home position cannot be detected when passing 3s while returning 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 rear DF side registration guide is not shifted manually, repair the part that restricts the operation.
  2 Checking the rear DF side registration guide drive parts The rear DF side registration guide drive parts are not attached properly, 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 properly connected or the wire is faulty. Reinsert the following wire 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(A4R)] or [Width Test(LTR)]. If DF side registration motor 2 does not operate correctly, 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 and execute U241 [Finisher] > [Width Front HP]. If it does not operate correctly, 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) Target: Inner finisher
• Causes: J6812 (Post DF rear width registration jam) is detected twice continuously.
• Remedy: 1 Checking the rear DF side registration guide The rear DF side registration guide is not assembled properly. If the rear DF side registration guide is not shifted manually, repair the part that restricts the operation.
  2 Checking the rear DF side registration guide drive parts The rear DF side registration guide drive parts are not attached properly, 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 properly connected or the wire is faulty. Reinsert the following wire 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(A4R)] or [Width Test(LTR)]. If DF side registration motor 2 does not operate correctly, 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 and execute U241 [Finisher] > [Width Front HP]. If it does not operate correctly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8210
• Description: DF slide motor front/rear error
  Target: Inner finisher
• Causes: The home position cannot be detected when passing 3s while returning 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 is not shifted manually back and forth, repair the part that restricts the operation.
  2 Checking the DF staple unit drive parts The DF staple unit drive parts are not attached properly, or they are faulty. Reattach the DF staple unit drive parts. If not repaired, replace them.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DF slide motor – DF PWB • DF slide sensor – DF PWB
  4 Replacing the DF slide motor The DF slide motor is faulty. Execute U240 [Motor] > [Staple Move]. If the DF slide motor does not operate correctly, replace it.
  5 Checking the DF slide sensor The DF slide sensor is not attached properly, or it is faulty. Reattach the DF slide sensor and execute U241 [Finisher] > [Staple HP]. If it does not operate correctly, replace it.
  6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8230
• Description: DF slide motor error 1
  Target: Inner finisher
• Causes: The DF staple jam was detected 2 times continuously.
  (Detection condition of 2nd paper jam: The home position cannot be detected after passing 600ms since starting up the motor.)
• Remedy: 1 Checking the DF staple unit The DF staple unit is not assembled properly. If the DF staple cannot operate manually without paper jam, repair the part that restricts the DF staple.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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: C8260
• Description: DF middle motor HP detection error
  Target: Inner finisher
• Causes: J7902 (DF puddle jam) is detected twice continuously.
• Remedy: 1 Checking the DF paddle drive parts The DF paddle drive parts are not attached properly, or they are faulty. Reattach the DF paddle drive parts. If not repaired, replace them.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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 correctly, replace it.
  4 Checking the DF paddle sensor The DF paddle sensor is not attached properly, or it is faulty. Reattach the DF paddle sensor and execute U241 [Finisher] > [Lead Paddle]. If it does not operate correctly, replace it.
  5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB.

• Code: C8500
• Description: Main program error / Mail Box communication error
  Target: Mail box
• Causes: The communication failed after confirming the connection with the mail box.
• Remedy: 1 Resetting the main power The PWB malfunctions. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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.

• Code: C8510
• Description: MB conveying motor error 1
  Target: Mail box
• Causes: MT home position sensor turning on is not detected when passing 5s at 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 properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • MT conveying motor – MT PWB • MT home position sensor – MT PWB
  3 Replacing the MT drive motor The MT drive motor is faulty. Execute U240 [Mail Box] > [Conv]. If the MT conveying motor does not operate correctly, replace it.
  4 Checking the MT home position sensor The MT home position sensor is not attached properly, or it is faulty. Reattach the MT home position sensor and execute U241 [Mail Box] > [Motor HP]. If it does not operate correctly, replace it.
  5 Replacing the MT PWB The MT PWB is faulty. Replace the MT PWB.

• Code: C8520
• Description: MB conveying motor error 2
  Target: Mail box
• Causes: MT home position sensor turning on is not detected when passing 1s at 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 attached properly. Reattach the MT conveying roller drive parts. If not repaired, replace them.
  4 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • MT conveying motor – MT PWB • MT home position sensor – MT PWB
  5 Replacing the MT drive motor The MT drive motor is faulty. Execute U240 [Mail Box] > [Conv]. If the MT conveying motor does not operate correctly, replace it.
  6 Checking the MT home position sensor The MT home position sensor is not attached properly, or it is faulty. Reattach the MT home position sensor and execute U241 [Mail Box] > [Motor HP]. If it does not operate correctly, 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)
  Target: Inner finisher
• Causes: 1. The main program is fault when turning the main power on.
  2. Engine- DF communication error is detected 10 times continuously.
• Remedy: 1 Resetting the main power The program does not start up properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the DF firmware to the latest version.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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
  Target: Inner finisher For the internal count
• Causes: The writing data and the reading data mismatch 3 times continuously.
• Remedy: 1 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire 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: C9180
• Description: DP feed-shift motor error
• Causes: The home position cannot be detected even if executing the retry of the home position detection 3 times continuously.
  [Note] Home position detection: When shifting the DP feed-shift motor to the home position, the retry will be executed if the home position could not be detected after driving the DP feed-shift motor 1-round.
• Remedy: 1 Resetting the main power The DP feed-shift motor is not controlled correctly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the DP feed-shift motor The DP feed-shift motor is not rotated correctly. Or, there is an excess load. Detach the DP feed-shift motor, and rotate the drive section manually to fix it. Then, reattach the motor.
  3 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • DP feed-shift motor – DP PWB • DP feed-shift sensor – DP PWB • DP PWB – Engine PWB
  4 Replacing the DP feed-shift motor The DP feed-shift motor is faulty. Replace the DP feed-shift motor if it does not operate correctly when executing U243 [Rev Motor].
  5 Checking the DP feed-shift sensor The DP feed-shift sensor is not attached properly or faulty. Reattaching the DP feed-shift sensor. If not solved, 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: C9500
• Description: Image processing PWB error A
• Causes:
• Remedy: 1 Checking the DP relay PWB The DP relay PWB is not attached properly, or it is faulty. Reattach the DP relay PWB. If not solved, replace it.
  2 Firmware upgrade The firmware is faulty. Upgrade the firmware to the latest version.
  3 Replacing the main PWB The main PWB is faulty. Replace the main 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 color’s 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 controller does not activate properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Operation panel PWB – Main PWB
  3 Checking the DDR memory The DDR memory is not properly connected. Remove the DDR memory on the main PWB. Then, clean the terminals and reinstall the DDR memory.
  4 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data.
  5 Replacing the main PWB The main PWB is faulty. Replace the main PWB.
  6 Replacing the operation panel PWB The operation panel PWB is faulty. Replace the operation panel 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 Resetting the main power The program does not start up properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  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 Checking the connection The connector is not properly connected or the wire is faulty. Reinsert the following wire connectors. If there is no continuity, replace the wire. • Operation panel PWB – Main PWB
  4 Executing U021 The backup RAM data is faulty. Execute U021 to initialize the backup RAM data.
  5 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 program does not start up properly. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on 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 and FFC are not connected properly or the wire, FFC or 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: The communication between the main PWB and the engine PWB is not normal.
• Remedy: 1 Resetting the main power The communication between the controller and the print engine is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Checking the connection FFC is not properly connected, or it is faulty. Reconnect the following FFC. When the FFC terminals are peeled off, deformed or the FFC is broken, replace the FFC. • Main PWB – Engine PWB
  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: F050
• Description: Engine main program error
• Causes: The engine program cannot start up.
• Remedy: 1 Resetting the main power The print engine ROM checksum is faulty. Turn off the power switch and unplug the power cord. After 5s passes, reconnect the power cord and turn on the power switch.
  2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version.
  3 Checking the EEPROM The EEPROM is not properly attached. Reattach the EEPROM.
  4 Checking the engine PWB The connector and FFC are not connected properly or the wire, FFC or 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.

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