Fixing Kyocera KM4050 Printer Error Codes in details

Fixing Kyocera KM4050 Printer Error Codes in details

– Printer model: Kyocera KM4050
– Fix Error codes on Kyocera KM4050 model and its description:

• Code: C0030
• Description: Fax control PWB system problem (optional fax) Processing with the fax software was disabled due to a hardware or software problem.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Replace the fax control PWB and verify the operation.

• Code: C0060
• Description: Main PWB type mismatch error
• Causes: Defective PWB.
• Remedy: Defective PWB. Contact the Service Administrative Division.

• Code: C0070
• Description: Fax control PWB incompatibility detection problem (optional fax) Fax software is not compatible with main software
• Causes: FAX and the machine are not compatible.
• Remedy: FAX and the machine are not compatible. Use the FAX control PWB that is designed for use with the machine.

• Code: C0130
• Description: Backup memory (EEPROM) device problem (Main PWB) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective main PWB. Device damage of EEPROM.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C0140
• Description: Backup memory (EEPROM) data problem (Main PWB) Reading data from EEPROM is abnormal.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: C0150
• Description: Backup memory device problem (Engine PWB) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective engine PWB. Device damage of EEPROM.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation. Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C0160
• Description: Backup memory data problem (Engine PWB) Reading data from EEPROM is abnormal. Read and write data does not match five times continuously.
• Causes: Problem with the backup memory data. Defective engine PWB.
• Remedy: Problem with the backup memory data. Run maintenance item U022 to initialize the backup memory data. Defective engine PWB. If the C0160 is displayed after initializing the backup memory, replace the engine PWB and check for correct operation.

• Code: C0170
• Description: Copy counts problem A checksum error is detected in the main and engine backup memories for the copy counters.
• Causes: Data damage of EEPROM. Defective PWB.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division. Defective PWB. Replace the main PWB or engine PWB and check for correct operation.

• Code: C0180
• Description: Machine number mismatch error Machine number of main PWB and engine PWB does not match.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: C0600
• Description: DIMM installed incorrectly DIMM is not installed correctly.
• Causes: DIMM installed incorrectly.
• Remedy: DIMM installed incorrectly. Check if the DIMM is inserted into the socket on the main PWB correctly.

• Code: C0610
• Description: DIMM problem The DIMM on the main PWB does not operate correctly.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective DIMM. Replace the DIMM and check for correct operation.

• Code: C0630
• Description: DMA problem DMA transmission of compressed, decompressed, rotated, relocated or blanked-out image data does not complete within the specified period of time.
• Causes: Defective DIMM. Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0640
• Description: Hard disk drive problem The hard disk cannot be accessed.
• Causes: Poor contact in the connector terminals. Defective hard disk. Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC49 on the main PWB and the connector on the hard disk. Repair or replace if necessary. Defective hard disk. Run U024 (HDD formatting) without turning the power off to initialize the hard disk. Replace the hard disk drive and check for correct operation if the problem is still detected after initialization. Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0700
• Description: CF error for backup Optional fax backup kit (CF) is not suitable as backup.
• Causes: CF installed incorrectly. Defective CF.
• Remedy: CF installed incorrectly. Install CF correctly. Defective CF. Run the maintenance item U933 to initialize the CF.

• Code: C0800
• Description: Image processing problem JAM05 is detected twice.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0830
• Description: Flash ROM program area checksum error (optional fax) A checksum error occurred with the program in the Flash ROM on the fax control PWB.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Upgrade the fax control PWB software. If the problem still remains, replace the fax control PWB and check for correct operation.

• Code: C0870
• Description: Fax control PWB to main PWB high capacity data transfer problem (optional fax) High-capacity data transfer between the fax control PWB and the main PWB was not normally performed even if the data transfer was retried the specified times.
• Causes: Poor contact in the connector terminals. Defective fax control PWB or main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC1 on the fax control PWB and YC4 on the interface PWB, connection of connector YC30 on the main PWB and YC6 on the interface PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective fax control PWB or main PWB. Replace the fax control PWB or main PWB and check for correct operation.

• Code: C0880
• Description: Fax control PWB program archive problem (optional fax) When power is turned on, the compressed program in the flash ROM on the fax control PWB was not successfully decompressed.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Replace the fax control PWB and check for correct operation.

• Code: C0920
• Description: Fax file system error (optional fax) The backup data is not retained for file system abnormality of flash memory of the fax control PWB.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Turn the main power switch off and then back on again. If the problem still remains, replace the fax control PWB and verify the operation.

• Code: C1010
• Description: Upper lift motor error When cassette 1 is inserted, upper lift limit switch does not turn on within 12 s of upper lift motor turning on. A motor over-current signal is detected continuously for 500 ms or longer.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of upper lift motor. Defective upper lift motor. Defective upper lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of upper lift motor and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of upper lift motor. Replace upper lift motor. Defective upper lift motor. Check for continuity across the coil. If none, replace upper lift motor. Defective upper lift limit switch. Check if YC13-B9 on the engine PWB goes low when upper lift limit switch is turned off. If not, replace upper lift limit switch. Poor contact in the connector terminals. Check the connection of connector of upper lift limit switch and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C1020
• Description: Lower lift motor error When cassette 2 is inserted, lower lift limit switch does not turn on within 12 s of lower lift motor turning on. A motor over-current signal is detected continuously for 500 ms or longer.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of lower lift motor. Defective lower lift motor. Defective lower lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of lower lift motor and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of lower lift motor. Replace lower lift motor. Defective lower lift motor. Check for continuity across the coil. If none, replace lower lift motor. Defective lower lift limit switch. Check if YC13-B15 on the engine PWB goes low when lower lift limit switch is turned off. If not, replace lower lift limit switch. Poor contact in the connector terminals. Check the connection of connector of lower lift limit switch and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C1030
• Description: Paper feeder lift motor 1 error (optional paper feeder) When optional cassette 3 is inserted, paper feeder lift switch 1 does not turn on within 12 s of paper feeder lift motor 1 turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of paper feeder lift motor 1. Defective paper feeder lift motor 1. Defective paper feeder lift switch 1.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of paper feeder lift motor 1. Replace paper feeder lift motor 1. Defective paper feeder lift motor 1. Check for continuity across the coil. If none, replace paper feeder lift motor 1. Defective paper feeder lift switch 1. Check if YC1-5 on the paper feeder main PWB goes low when paper feeder lift switch 1 is turned off. If not, replace paper feeder lift switch 1.

• Code: C1040
• Description: Paper feeder lift motor 2 error (optional paper feeder) When optional cassette 4 is inserted, paper feeder lift switch 2 does not turn on within 12 s of paper feeder lift motor 2 turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of paper feeder lift motor 2. Defective paper feeder lift motor 2. Defective paper feeder lift switch 2.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of paper feeder lift motor 2. Replace paper feeder lift motor 2. Defective paper feeder lift motor 2. Check for continuity across the coil. If none, replace paper feeder lift motor 2. Defective paper feeder lift switch 2. Check if YC1-7 on the paper feeder main PWB goes low when paper feeder lift switch 2 is turned off. If not, replace paper feeder lift switch 2.

• Code: C1100
• Description: Paper feeder lift motor 1 error (optional 3000-sheet paper feeder) A motor overcurrent signal is detected continuously for 1 s or longer.
• Causes: Poor contact in the connector terminals. Paper feeder lift motor 1 does not rotate correctly (the motor is overloaded).
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Paper feeder lift motor 1 does not rotate correctly (the motor is overloaded). Check the gears and remedy if necessary.

– Kyocera KM4050 printer Error Codes and quick guide to troubleshooting:

• Code: C1110
• Description: Paper feeder lift motor 2 error (optional 3000-sheet paper feeder) A motor over-current signal is detected continuously for 1 s or longer.
• Causes: Poor contact in the connector terminals. Paper feeder lift motor 2 does not rotate correctly (the motor is overloaded).
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Paper feeder lift motor 2 does not rotate correctly (the motor is overloaded). Check the gears and remedy if necessary.

• Code: C1120
• Description: Paper feeder left lift position problem (optional 3000-sheet paper feeder) Paper feeder switch 2 does not turn on within 30 s of paper feeder lift motor 1 turning on.
• Causes: Poor contact in the connector terminals. Defective paper feeder lift switch 2. Defective paper feeder lift motor 1. The paper feeder left lift does not rise properly.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper feeder lift switch 2. Check if YC5-7 on the paper feeder main PWB goes low when paper feeder lift switch 2 is turned off. If not, replace paper feeder lift switch 2. Defective paper feeder lift motor 1. Check for continuity across the coil. If none, replace paper feeder lift motor 1. The paper feeder left lift does not rise properly. Check the gears and belts, and remedy if necessary.

• Code: C1130
• Description: Paper feeder right lift position problem (optional 3000-sheet paper feeder) Paper feeder switch 1 does not turn on within 30 s of paper feeder lift motor 2 turning on.
• Causes: Poor contact in the connector terminals. Defective paper feeder lift switch 1. Defective paper feeder lift motor 2. The paper feeder right lift does not rise properly.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper feeder lift switch 1. Check if YC5-4 on the paper feeder main PWB goes low when paper feeder lift switch 1 is turned off. If not, replace paper feeder lift switch 1. Defective paper feeder lift motor 2. Check for continuity across the coil. If none, replace paper feeder lift motor 2. The paper feeder right lift does not rise properly. Check the gears and belts, and remedy if necessary.

• Code: C1800
• Description: Paper feeder unit communication problem (optional paper feeder/3000sheet paper feeder) No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact in the connector terminals. Defective engine PWB. Defective paper feeder main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective paper feeder main PWB. Replace the paper feeder main PWB and check for correct operation.

• Code: C1900
• Description: Paper feeder EEPROM error (optional paper feeder) When writing the data, the write data and the read data is not continuously in agreement three times.
• Causes: Poor contact in the connector terminals. Defective engine PWB. Defective paper feeder.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective paper feeder. Replace the paper feeder with another unit and check the operation. If the operation is normal, replace or repair optional paper feeder.

• Code: C2000
• Description: Drive motor problem Stable OFF is detected for 1 s continuously after drive motor stability. The drive motor is not stabilized in 6 s since the motor is activated.
• Causes: Poor contact in the connector terminals. Defective drive transmission system. Defective engine PWB. Defective drive motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC11 on the engine PWB and the connector on the drive motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective drive motor. Replace the drive motor.

• Code: C2250
• Description: Main charger cleaning motor error A locking error has been detected three times in a row during a reciprocating cleaning motion.
• Causes: Poor contact in the connector terminals. Defective drive transmission system. Defective engine PWB. Defective main charger cleaning motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the engine PWB and the connector on the main charger cleaning motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective main charger cleaning motor. Replace the main charger cleaning motor.

• Code: C2500
• Description: Paper feed motor error Stable OFF is detected for 1 s continuously after paper feed motor stability. The paper feed motor is not stabilized in 6 s since the motor is activated.
• Causes: Poor contact in the connector terminals. Defective drive transmission system. Defective engine PWB. Defective paper feed motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC11 on the engine PWB and the connector on the paper feed motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective paper feed motor. Replace the paper feed motor.

• Code: C2600
• Description: Paper feeder paper conveying motor error (optional 3000-sheet paper feeder) The lock signal of the motor is detected avobe 450 ms. Paper feeder drive motor error (optional paper feeder) The lock signal of the motor is detected avobe 500 ms.
• Causes: Poor contact in the connector terminals. Paper feeder paper conveying motor / paper feeder drive motor does not rotate correctly (the motor is overloaded). Defective PWB. Defective motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Paper feeder paper conveying motor / paper feeder drive motor does not rotate correctly (the motor is overloaded). Check the gears and remedy if necessary. Defective PWB. Replace the paper feeder main PWB or engine PWB and check for correct operation. Defective motor. Replace the paper feeder paper conveying motor / paper feeder drive motor.

• Code: C3100
• Description: Scanner carriage problem The home position is not correct when the power is turned on or at the start of copying using the table.
• Causes: Poor contact in the connector terminals. Defective scanner PWB. Defective scanner home position switch. Defective scanner motor. The mirror frame, exposure lamp, or scanner wire is defective.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC4 on the scanner PWB and the connector on the scanner home position switch, and the continuity across the connector terminals. Repair or replace if necessary. Defective scanner PWB. Replace the scanner PWB and check for correct operation. Defective scanner home position switch. Replace the scanner home position switch. Defective scanner motor. Replace the scanner motor. The mirror frame, exposure lamp, or scanner wire is defective. Check if the mirror flames and exposure lamp are on the rail. And check the scanner wire winds correctly.

• Code: C3200
• Description: Exposure lamp problem After the reading starting, when input value at the time of exposure lamp illumination does not exceed the threshold value between 5 s.
• Causes: Poor contact in the connector terminals. Defective scanner PWB. Defective CCD PWB. Defective exposure lamp or inverter PWB. Incorrect shading position.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the scanner PWB and the connector on the inverter PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective scanner PWB. Replace the scanner PWB and check for correct operation. Defective CCD PWB. Replace the CCD PWB and check for correct operation. Defective exposure lamp or inverter PWB. Replace the exposure lamp or inverter PWB. Incorrect shading position. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch.

• Code: C3210
• Description: CIS lamp problem After the reading starting, when input value at the time of CIS illumination does not exceed the threshold value between 5 s.
• Causes: Poor contact in the connector terminals. Defective DP main PWB. Defective DP inverter PWB. Defective CIS.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the main PWB and the connector on the DP main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective DP main PWB. Replace the DP main PWB and check for correct operation. Defective DP inverter PWB. Replace the DP inverter PWB and check for correct operation. Defective CIS. Replace the CIS and check for correct operation.

• Code: C3300
• Description: CCD AGC problem After AGC, correct input is not obtained at CCD.
• Causes: Poor contact in the connector terminals. Defective exposure lamp. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the SHD PWB and the connector on the CCD PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective exposure lamp. Replace the exposure lamp or inverter PWB. Defective PWB. Replace the SHD PWB or CCD PWB and check for correct operation.

• Code: C3310
• Description: CIS AGC problem After AGC, correct input is not obtained at CIS.
• Causes: Defective DP main PWB. CIS output problem. Defective DP inverter PWB.
• Remedy: Defective DP main PWB. Replace the DP main PWB and check for correct operation. CIS output problem. Replace the CIS and check for correct operation. Defective DP inverter PWB. Replace the DP inverter PWB and check for correct operation.

• Code: C3500
• Description: Communication error between scanner and SHD An error code is detected.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC3 on the scanner PWB and the connector YC4 on the SHD PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the scanner PWB or SHD PWB and check for correct operation.

• Code: C3900
• Description: Backup memory read/write problem (scanner PWB) Read and write data does not match.
• Causes: Defective backup RAM or scanner PWB.
• Remedy: Defective backup RAM or scanner PWB. Replace the scanner PWB and check for correct operation.

• Code: C3910
• Description: Backup memory data problem (scanner PWB) Data in the specified area of the backup memory does not match the specified values.
• Causes: Problem with the backup memory data. Defective scanner PWB.
• Remedy: Problem with the backup memory data. Run maintenance item U022 to initialize the backup memory data. Defective scanner PWB. If the C3910 is displayed after initializing the backup memory, replace the scanner PWB and check for correct operation.

• Code: C4000
• Description: Polygon motor synchronization problem The polygon motor does not reach the stable speed within 20 s of the START signal turning on.
• Causes: Poor contact in the connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary. Defective polygon motor. Replace the laser scanner unit. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4010
• Description: Polygon motor steady-state problem Stable OFF is detected for 20 s continuously after polygon motor stability.
• Causes: Poor contact in the connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary. Defective polygon motor. Replace the laser scanner unit. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4200
• Description: BD steady-state problem ASIC detects a BD error A for 2 s after the polygon motor rotation has been stabilized.
• Causes: Poor contact in the connector terminals. Defective laser scanner unit. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary. Defective laser scanner unit. Replace the laser scanner unit. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C5300
• Description: Broken cleaning lamp wire While the cleaning lamp is on, the broken cleaning lamp wire detection signal is detected for 2 s continuously.
• Causes: Defective cleaning lamp. Defective engine PWB.
• Remedy: Defective cleaning lamp. Replace the cleaning lamp. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C6000
• Description: Fuser heater break Fuser unit thermistor 1 detected less than 70C/158F for 10 s during warm-up and ready in. During warm-up, the temperature at the fuser unit themistor 1 does not rise by 1C/1.8F continuously for 5 s. Fuser unit thermistor 2 detected less than 40C/104F for 10 s during warm-up and ready in. During warm-up, the temperature at the fuser unit themistor 2 does not rise by 1C/1.8F continuously for 5 s.
• Causes: Defective fuser heater M or S. Installation defectiveness on fuser unit thermistor 1. Defective fuser unit thermostat. Defective PWB.
• Remedy: Defective fuser heater M or S. Replace the fuser heater M or S. Installation defectiveness on fuser unit thermistor 1. Check the mounting state of the fuser unit thermistor 1. If any problem is found, repair it. Defective fuser unit thermostat. Replace the fuser unit thermostat. Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6020
• Description: Abnormally high fuser unit thermistor temperature Fuser unit thermistor 1 or 2 is detected 250C/482F or more for 40 ms.
• Causes: Installation defectiveness on fuser unit thermistor 1 or 2. Defective fuser thermistor unit 1 or 2. Defective engine PWB.
• Remedy: Installation defectiveness on fuser unit thermistor 1 or 2. Check the mounting state of the fuser unit thermistor 1 or 2. If any problem is found, repair it. Defective fuser thermistor unit 1 or 2. Replace the fuser unit thermistor 1 or 2. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C6030
• Description: Fuser unit thermistor break error The fuser unit thermistor break signal is detected continuously for 1 s.
• Causes: Installation defectiveness on fuser unit thermistor 1 or 2. Defective fuser unit thermistor 1 or 2. Defective engine PWB.
• Remedy: Installation defectiveness on fuser unit thermistor 1 or 2. Check the mounting state of the fuser unit thermistor 1 or 2. If any problem is found, repair it. Defective fuser unit thermistor 1 or 2. Replace the fuser unit thermistor 1 or 2. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C6050
• Description: Abnormally low fuser unit thermistor temperature Fuser unit thermistor 1 is detected 80C/ 176F less than 1 s continuously during copying.
• Causes: Defective fuser heater M or S. Installation defectiveness on fuser unit thermistor 1. Defective PWB.
• Remedy: Defective fuser heater M or S. Replace the fuser heater M or S. Installation defectiveness on fuser unit thermistor 1. Check the mounting state of the fuser unit thermistor 1. If any problem is found, repair it. Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6400
• Description: Zero-cross signal error While fuser heater ON/OFF control is performed, the zero-cross signal is not input within 3 s.
• Causes: Defective PWB.
• Remedy: Defective PWB. Replace the engine PWB or power source PWB and check for correct operation.

• Code: C6410
• Description: Fuser unit connector insertion problem Absence of the fuser unit is detected.
• Causes: Fuser unit connector inserted incorrectly. Defective fuser unit connector.
• Remedy: Fuser unit connector inserted incorrectly. Reinsert the fuser unit connector if necessary. Defective fuser unit connector. Replace the fuser unit.

• Code: C6420
• Description: Fuser unit fuse cut problem The fuse cannot be cut, When replacing the fuser unit, the fuse cannot be cut in 33 s after the fuse cut signal is turned on.
• Causes: Poor contact in the connector terminals. Fuser unit connector inserted incorrectly.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC10 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Fuser unit connector inserted incorrectly. Reinsert the fuser unit connector if necessary.

• Code: C7300
• Description: Toner container problem Toner level is not detected when toner empty is detected.
• Causes: Poor contact in the connector terminals. Defective toner container sensor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective toner container sensor. Replace the toner container sensor.

• Code: C7400
• Description: Developing unit connector insertion problem Absence of the developing unit is detected.
• Causes: Developing unit connector inserted incorrectly. Defective developing unit connector.
• Remedy: Developing unit connector inserted incorrectly. Reinsert the developing unit connector if necessary. Defective developing unit connector. Replace the developing unit.

• Code: C7410
• Description: Drum unit connector insertion problem Absence of the drum unit is detected.
• Causes: Drum unit connector inserted incorrectly. Defective drum unit connector.
• Remedy: Drum unit connector inserted incorrectly. Reinsert the drum unit connector if necessary. Defective drum unit connector. Replace the drum unit.

• Code: C7800
• Description: Broken external thermistor wire The thermistor output value is 4.5 V or more.
• Causes: Poor contact in the connector terminals. Defective humidity sensor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC14 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective humidity sensor. Replace the humidity sensor.

• Code: C7810
• Description: Short-circuited external thermistor The thermistor input value is 0.5 V or less.
• Causes: Poor contact in the connector terminals. Defective humidity sensor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC14 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective humidity sensor. Replace the humidity sensor.

• Code: C7900
• Description: Drum EEPROM error Reading from or writing to EEPROM cannot be performed.
• Causes: Poor contact in the connector terminals. Defective drum unit.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum unit. Replace the drum unit.

• Code: C7910
• Description: Developing unit EEPROM error Reading from or writing to EEPROM cannot be performed.
• Causes: Poor contact in the connector terminals. Defective developing unit.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective developing unit. Replace the developing unit.

• Code: C8020
• Description: Punch motor problem (optional 3000sheet document finisher) The LOCK signal of the punch motor is detected for more than 500 ms while the punch motor is operating.
• Causes: Poor contact in the connector terminals. Defective punch motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the punch PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective punch motor. Replace the punch motor. Defective PWB. Replace the punch PWB or finisher main PWB and check for correct operation.

• Code: C8030
• Description: Tray upper limit detection problem (optional document finisher) When the tray elevation motor raises a tray, the ON status of the tray upper limit sensor is detected.
• Causes: The tray upper limit sensor/push paper sensor/surface view sensor connector makes poor contact. Defective tray upper limit sensor/ push paper sensor/ surface view sensor. Defective finisher main PWB.
• Remedy: The tray upper limit sensor/push paper sensor/surface view sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective tray upper limit sensor/ push paper sensor/ surface view sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8050
• Description: Paper conveying belt motor 1 problem (optional 3000-sheet document finisher) Paper conveying belt home position sensor 1 does not turn off within 1.5 s. Paper conveying belt home position sensor 1 does not turn on within 2.5 s. Jam 88 is indicated.
• Causes: Poor contact in the connector terminals. Defective paper conveying belt home position sensor 1. Defective paper conveying belt motor 1. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the internal tray PWB and the connector on paper conveying belt motor 1, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper conveying belt home position sensor 1. Replace paper conveying belt home position sensor 1. Defective paper conveying belt motor 1. Replace paper conveying belt motor 1. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8060
• Description: Paper conveying belt motor 2 problem (optional 3000-sheet document finisher) Paper conveying belt home position sensor 2 does not turn off within 1.5 s. Paper conveying belt home position sensor 2 does not turn on within 2.5 s.
• Causes: Poor contact in the connector terminals. Defective paper conveying belt home position sensor 2. Defective paper conveying belt motor 2. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the internal tray PWB and the connector on paper conveying belt motor 2, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper conveying belt home position sensor 2. Replace paper conveying belt home position sensor 2. Defective paper conveying belt motor 2. Replace paper conveying belt motor 2. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8070
• Description: Internal tray communication error (optional 3000-sheet document finisher) Communication with the internal tray is not possible although the connection is detected.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the finisher main PWB and the connector YC1 on the internal tray PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8140
• Description: Main tray problem (optional 3000sheet document finisher) The main tray is not detected by the main tray top limit detection sensor or the main tray capacity detection sensor within 20 s since the tray has started ascending. The main tray upper limit detection sensor or the main tray load detection sensor is not detected to be turned off in 20 s after the main tray has descended. The main tray low limit detection sensor is not detected to be turned on in 20 s after the main tray has descended. During main tray ascent, the main tray upper limit detection sensor or the main tray load detection sensor stays on for more than 2 s.
• Causes: Poor contact in the connector terminals. Defective main tray motor. Defective main tray upper limit detection sensor/main tray load detection sensor/main tray lower limit detection sensor. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the finisher main PWB and the connector on the main tray motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective main tray motor. Replace the main tray motor. Defective main tray upper limit detection sensor/main tray load detection sensor/main tray lower limit detection sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8140
• Description: Tray elevation motor problem (optional document finisher) When the tray elevation motor is driving, the ON status of the tray lower limit sensor or surface view sensor cannot be detected even if a specified time has elapsed.
• Causes: The tray elevation motor connector makes poor contact. The tray elevation motor malfunctions. The tray lower limit sensor/push paper sensor/surface view sensor connector makes poor contact. Defective tray lower limit sensor/ push paper sensor/ surface view sensor. Defective finisher main PWB.
• Remedy: The tray elevation motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. The tray elevation motor malfunctions. Replace the tray elevation motor. The tray lower limit sensor/push paper sensor/surface view sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective tray lower limit sensor/ push paper sensor/ surface view sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8170
• Description: Side registration motor 1 problem (optional 3000-sheet document finisher) When operation returned to a home position is performed at the time of initial operation and a home position is not detected even if 3 s passed. Jam 88 is indicated.
• Causes: Poor contact in the connector terminals. Defective side registration motor 1. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the internal tray PWB and the connector on side registration motor 1, and the continuity across the connector terminals. Repair or replace if necessary. Defective side registration motor 1. Replace side registration motor 1. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8170
• Description: Adjustment motor problem (optional document finisher) When the adjustment motor is driving, the ON status of the adjustment home position sensor cannot be detected even if a specified time has elapsed. When adjustment operation starts, the ON status of the adjustment home position sensor is not detected.
• Causes: The adjustment motor connector makes poor contact. Defective adjustment motor. The adjustment home position sensor connector makes poor contact. Defective adjustment home position sensor. Defective finisher main PWB.
• Remedy: The adjustment motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective adjustment motor. Replace adjustment motor. The adjustment home position sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective adjustment home position sensor. Replace the adjustment home position sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8170
• Description: Finisher front side registration motor problem (optional built-in finisher) When the front-side registration home-position sensor is turned on during initialization, the sensor did not turn on while it has moved by 106 pulses. When the front-side registration home-position sensor is turned off during initialization, the sensor did not turn on in 3 s.
• Causes: The front side registration motor connector makes poor contact. Defective front side registration motor. The front side registration home position sensor connector makes poor contact. Defective front side registration home position sensor. Defective finisher control PWB.
• Remedy: The front side registration motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective front side registration motor. Replace front side registration motor. The front side registration home position sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective front side registration home position sensor. Replace the front side registration home position sensor. Defective finisher control PWB. Replace the finisher control PWB and check for correct operation.

• Code: C8180
• Description: Side registration motor 2 problem (optional 3000-sheet document finisher) When operation returned to a home position is performed at the time of initial operation and a home position is not detected even if 3 s passed. Jam 88 is indicated.
• Causes: Poor contact in the connector terminals. Defective side registration motor 2. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the internal tray PWB and the connector of side registration motor 2, and the continuity across the connector terminals. Repair or replace if necessary. Defective side registration motor 2. Replace side registration motor 2. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8180
• Description: Finisher rear side registration motor problem (optional built-in finisher) When the rear-side registration home-position sensor is turned on during initialization, the sensor did not turn on while it has moved by 106 pulses. When the rear-side registration home-position sensor is turned off during initialization, the sensor did not turn on in 3 s.
• Causes: The rear side registration motor connector makes poor contact. Defective rear side registration motor. The rear side registration home position sensor connector makes poor contact. Defective rear side registration home position sensor. Defective finisher control PWB.
• Remedy: The rear side registration motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective rear side registration motor. Replace rear side registration motor. The rear side registration home position sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective rear side registration home position sensor. Replace the rear side registration home position sensor. Defective finisher control PWB. Replace the finisher control PWB and check for correct operation.

• Code: C8190
• Description: Finisher trailing edge registration motor problem (optional built-in finisher) When the trailing edge registration home-position sensor is turned on during initialization, the sensor did not turn on while it has moved by 106 pulses. When the trailing edge registration home-position sensor is turned off during initialization, the sensor did not turn on in 3 s.
• Causes: The trailing edge registration motor connector makes poor contact. Defective trailing edge registration motor. The trailing edge registration home position sensor connector makes poor contact. Defective trailing edge registration home position sensor. Defective finisher control PWB.
• Remedy: The trailing edge registration motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective trailing edge registration motor. Replace trailing edge registration motor. The trailing edge registration home position sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective trailing edge registration home position sensor. Replace the trailing edge registration home position sensor. Defective finisher control PWB. Replace the finisher control PWB and check for correct operation.

• Code: C8210
• Description: Stapler moving motor 1 error (optional 3000-sheet document finisher) When operation returned to a home position is performed at the time of initial operation and a home position is not detected even if 1.5 s passed.
• Causes: Poor contact in the connector terminals. Defective stapler moving motor 1. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the finisher main PWB and the connector of stapler moving motor 1, and the continuity across the connector terminals. Repair or replace if necessary. Defective stapler moving motor 1. Replace stapler moving motor 1. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8210
• Description: Stapler problem (optional document finisher) When the stapler motor is driving, the ON status of the stapler home position sensor cannot be detected even if a specified time has elapsed.
• Causes: The stapler connector makes poor contact. The stapler is blocked with a staple. The stapler is broken. Defective finisher main PWB.
• Remedy: The stapler connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. The stapler is blocked with a staple. Remove the stapler cartridge, and check the cartridge and the stapling section of the stapler. The stapler is broken. Replace the stapler and check for correct operation. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8210
• Description: Finisher stapler problem (optional built-in finisher) The stapler home position sensor does not change state from nondetection to detection within 200 ms of the start of stapler motor counterclockwise (forward) rotation. During initialization, the stapler home position sensor does not change state from non-detection to detection within 600 ms of the start of stapler motor clockwise (reverse) rotation.
• Causes: The stapler connector makes poor contact. The stapler is blocked with a staple. The stapler is broken. Defective finisher control PWB.
• Remedy: The stapler connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. The stapler is blocked with a staple. Remove the stapler cartridge, and check the cartridge and the stapling section of the stapler. The stapler is broken. Replace the front stapler and check for correct operation. Defective finisher control PWB. Replace the finisher control PWB and check for correct operation.

• Code: C8220
• Description: Stapler moving motor 2 error (optional 3000-sheet document finisher) When operation returned to a home position is performed at the time of initial operation and a home position is not detected even if 3.5 s passed.
• Causes: Poor contact in the connector terminals. Defective stapler moving motor 2. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC10 on the finisher main PWB and the connector of stapler moving motor 2, and the continuity across the connector terminals. Repair or replace if necessary. Defective stapler moving motor 2. Replace stapler moving motor 2. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8230
• Description: Stapler motor problem (optional 3000sheet document finisher) Jam 82 is indicated.
• Causes: Poor contact in the connector terminals. Defective stapler motor. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC10 on the finisher main PWB and the connector of stapler motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective stapler motor. Replace the stapler motor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8300
• Description: Centerfold unit communication error (optional centerfold unit of 3000-sheet document finisher) Communication with the centerfold unit is not possible although the connection is detected.
• Causes: Poor contact in the connector terminals. Defective centerfold unit set switch. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC22 on the finisher main PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold unit set switch. Replace the centerfold unit set switch. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8310
• Description: Centerfold side registration motor 1 problem (optional centerfold unit of 3000-sheet document finisher) The home position is not detected when initial operation even if 1000 ms passed.
• Causes: Poor contact in the connector terminals. Defective centerfold side registration motor 1. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the centerfold main PWB and the connector of centerfold side registration motor 1, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold side registration motor 1. Replace centerfold side registration motor 1. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8320
• Description: Centerfold paper conveying belt motor problem (optional centerfold unit of 3000-sheet document finisher) The home position is not detected when initial operation even if 2500 ms passed.
• Causes: Poor contact in the connector terminals. Defective centerfold paper conveying belt motor 1/2. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6/ YC7 on the centerfold main PWB and the connector of centerfold paper conveying belt motor 1/2, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold paper conveying belt motor 1/2. Replace centerfold paper conveying belt motor 1/2. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8330
• Description: Blade motor problem (optional centerfold unit of 3000-sheet document finisher) The home position is not detected when initial operation even if 1500 ms passed.
• Causes: Poor contact in the connector terminals. Defective blade motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the centerfold main PWB and the connector of the blade motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective blade motor. Replace the blade motor. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8340
• Description: Centerfold staple motor problem (optional centerfold unit of 3000-sheet document finisher) Jam 89 is indicated.
• Causes: Poor contact in the connector terminals. Defective centerfold staple motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the centerfold main PWB and the connector of the centerfold staple motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold staple motor. Replace the centerfold staple motor. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8350
• Description: Centerfold side registration motor 2 problem (optional centerfold unit of 3000-sheet document finisher) The home position is not detected when initial operation even if 1000 ms passed.
• Causes: Poor contact in the connector terminals. Defective centerfold side registration motor 2. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC7 on the centerfold main PWB and the connector of centerfold side registration motor 2, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold side registration motor 2. Replace centerfold side registration motor 1. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8360
• Description: Centerfold main motor problem (optional centerfold unit of 3000-sheet document finisher) The motor lock signal is detected above 1000 ms during driving the centerfold main motor.
• Causes: Poor contact in the connector terminals. Defective centerfold main motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC12 on the centerfold main PWB and the connector of the centerfold main motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold main motor. Replace the centerfold main motor. Defective PWB. Replace the centerfold main PWB or finisher main PWB and check for correct operation.

• Code: C8440
• Description: Sensor adjusting problem (optional document finisher) The sensor cannot be adjusted within the specified range.
• Causes: The paper entry sensor connector makes poor contact. Defective paper entry sensor. The optical path of the paper entry sensor is blocked by foreign matter. Defective finisher main PWB.
• Remedy: The paper entry sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective paper entry sensor. Replace the paper entry sensor and check for correct operation. The optical path of the paper entry sensor is blocked by foreign matter. Remove the foreign matter. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8460
• Description: EEPROM problem (optional document finisher) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective EEPROM or finisher main PWB.
• Remedy: Defective EEPROM or finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8500
• Description: Mailbox communication error (optional mailbox of 3000-sheet document finisher) Communication with the mailbox is not possible although the connection is detected.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of the connector of the mailbox and the connector YC7 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the mailbox main PWB or finisher main PWB and check for correct operation.

• Code: C8510
• Description: Mailbox drive motor problem (optional mailbox of 3000-sheet document finisher) The motor lock signal is detected above 500 ms during driving the mailbox drive motor.
• Causes: Poor contact in the connector terminals. Defective mailbox drive motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the mailbox main PWB and the connector of the mailbox drive motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective mailbox drive motor. Replace the mailbox drive motor. Defective PWB. Replace the mailbox main PWB or finisher main PWB and check for correct operation.

• Code: C8800
• Description: Document finisher communication problem (optional 3000-sheet document finisher) No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the finisher main PWB and the connector on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the finisher main PWB or engine PWB and check for correct operation.

• Code: C8900
• Description: Backup memory data problem (optional 3000-sheet document finisher) Read and write data does not match.
• Causes: Poor contact in the connector terminals. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the finisher main PWB and the connector on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8910
• Description: Backup memory data problem (optional punch unit of 3000-sheet document finisher) Read and write data does not match.
• Causes: Poor contact in the connector terminals. Defective punch PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the punch PWB and the connector YC4 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective punch PWB. Replace the punch PWB and check for correct operation.

• Code: C8920
• Description: Backup memory data problem (optional mailbox of 3000-sheet document finisher) Read and write data does not match.
• Causes: Poor contact in the connector terminals. Defective mailbox main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the mailbox main PWB and the connector YC7 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective mailbox main PWB. Replace the mailbox main PWB and check for correct operation.

• Code: C8930
• Description: Backup memory data problem (optional centerfold unit of 3000-sheet document finisher) Read and write data does not match.
• Causes: Poor contact in the connector terminals. Defective centerfold main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the centerfold main PWB and the connector YC5 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective centerfold main PWB. Replace the centerfold main PWB and check for correct operation.

• Code: C9000
• Description: DP communication problem (optional DP) A communication error is detected.
• Causes: Poor contact in the connector terminals. Defective DP main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC7 on the scanner PWB and the connector of the DP, and the continuity across the connector terminals. Repair or replace if necessary. Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: C9040
• Description: DP lift motor going up error (optional DP) The pulse count raised to 10000 at lifting, however, the DP lift switch could not be turned on. After one time retry, the DP lift limit switch could not be turned on.
• Causes: Loose connection of the DP lift motor connector. Malfunction of the DP lift motor. Malfunction of the DP lift upper limit switch. Loose connection of the DP lift upper limit switch connector. Defective DP main PWB.
• Remedy: Loose connection of the DP lift motor connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Malfunction of the DP lift motor. Replace the DP lift motor and check for correct operation. Malfunction of the DP lift upper limit switch. Replace the DP lift upper limit switch and check for correct operation. Loose connection of the DP lift upper limit switch connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: C9050
• Description: DP lift motor going down error (optional DP) The pulse count lowered to 10000 at lifting down, however, the DP bottom limit switch could not be turned on. After one time retry, the DP bottom limit switch could not be turned on.
• Causes: Loose connection of the DP lift motor connector. Malfunction of the DP lift motor. Malfunction of the DP lift lower limit switch. Loose connection of the DP lift lower limit switch connector. Defective DP main PWB.
• Remedy: Loose connection of the DP lift motor connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Malfunction of the DP lift motor. Replace the DP lift motor and check for correct operation. Malfunction of the DP lift lower limit switch. Replace the DP lift lower limit switch and check for correct operation. Loose connection of the DP lift lower limit switch connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: C9060
• Description: DP EEPROM error (optional DP) Read and write data does not match. Data in the specified area of the backup memory does not match the specified values.
• Causes: Defective DP main PWB. Device damage of EEPROM.
• Remedy: Defective DP main PWB. Replace the DP main PWB and check for correct operation. Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C9070
• Description: Communication problem between DP and SHD (optional DP) A communication error is detected.
• Causes: Loose connection of the SHD PWB. Defective SHD PWB.
• Remedy: Loose connection of the SHD PWB. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective SHD PWB. Replace the SHD PWB and check for correct operation.

• Code: C9080
• Description: Communication problem between DP and CIS (optional DP) Reading cannot be performed correctly.
• Causes: Loose connection of CIS. Defective CIS.
• Remedy: Loose connection of CIS. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective CIS. Replace CIS and check for correct operation.

• Code: F000
• Description: Operation panel PWB communication error
• Causes: Defective main PWB. Defective operation panel PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective operation panel PWB. Replace the operation panel PWB and check for correct operation.

• Code: F010
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: F020
• Description: Memory checksum error
• Causes: Defective main PWB. Defective expansion memory.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective expansion memory. Replace the expansion memory and check for correct operation.

• Code: F030
• Description: Main PWB system error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: F040
• Description: Engine PWB communication error
• Causes: Defective main PWB. Defective engine PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: F041
• Description: Scanner PWB communication error
• Causes: Defective main PWB. Defective scanner PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective scanner PWB. Replace the scanner PWB and check for correct operation.

• Code: F050
• Description: Engine ROM checksum error
• Causes: Defective engine PWB.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: F060
• Description: Engine RAM error
• Causes: Defective engine PWB.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: F070
• Description: Flash ROM error
• Causes: Defective flash ROM.
• Remedy: Defective flash ROM. Replace the engine PWB and check for correct operation.

• Code: F080
• Description: Flash ROM error (during download)
• Causes: Defective flash ROM.
• Remedy: Defective flash ROM. Replace the engine PWB and check for correct operation.

• Code: F090
• Description: Fax control PWB communication error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: F14F
• Description: Power source PWB secondary side error
• Causes: Defective power source PWB.
• Remedy: Defective power source PWB. Replace the power source PWB and check for correct operation.

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