• Code: C2650
• Description: Main backup media access error • The re-written data, which has been read out, checked and founded as error, is read out again and found as error. • The error was found when reading out the counter value. • The machine detects that the service EEPROM board is not loaded in position.
• Causes: Service EEPROM board (SV ERB) Printer control board (PRCB)
• Remedy: 1 Check the connector (CN33) on PRCB, the connector (CN1) on SV ERB, and the harness between the boards for proper connection and correct as necessary. 2 Change PRCB 1. Turn OFF the main power switch and replace the current PRCB with a new one. (When using a PRCB of another machine in service, be sure to use a PRCB installed in the same model.) 131 2. Update the PRCB firmware. 3. After completing the firmware update, turn OFF and ON the main power switch and check to see that warm-up is started. Make sure that malfunction codes other than C2650 or improper IU/TC placement is not detected. 4. When the trouble cannot be solved, reinstall the removed PRCB to the original board. NOTE • When taking the above steps, check whether PRCB is defective or not without replacing the SV ERB. 3 Change SV ERB 1. Replace the current SV ERB with a new one. 139 2. Turn ON the main power switch and check to see that warm-up is started. (One minute is spent to prepare the new SV ERB for use. During the period, the control panel backlight stays off.) Make sure that malfunction codes other than C2650 or improper IU/TC placement is not detected. 3. Make the specified readjustments. 139 4 If the above actions do not solve the problem, contact KMBT.

• Code: C2654
• Description: EEPROM access error (DC K) • The re-written data, which has been read out, checked and founded as error, is read out again and found as error. • The error was found when reading out the counter value.
• Causes: Developing unit Printer control board (PRCB)
• Remedy: 1 Clean the connection between the developing unit and the machine if dirty 2 Reinstall developing unit 3 Check the harness for proper connection and correct as necessary. 4 Change developing unit 5 Change PRCB

• Code: C2A14
• Description: Drum unit new release failure • The status with the new unit is not cleared after the new drum unit/K is set.
• Causes: Toner cartridge Drum unit Printer control board (PRCB)
• Remedy: 1 Clean the connection between the toner cartridge/drum unit and the machine if dirty. 2 Reinstall toner cartridge/drum unit 3 Check the harness for proper connection and correct as necessary. 4 Change toner cartridge/drum unit 5 Change PRCB

• Code: C2A24
• Description: Toner cartridge/K new release failure • The status with the new cartridge is not cleared after the new toner cartridge is set
• Causes: Toner cartridge Drum unit Printer control board (PRCB)
• Remedy: 1 Clean the connection between the toner cartridge/drum unit and the machine if dirty. 2 Reinstall toner cartridge/drum unit 3 Check the harness for proper connection and correct as necessary. 4 Change toner cartridge/drum unit 5 Change PRCB

• Code: C3101
• Description: Fusing roller separation failure • With the fusing roller being retracted, the pulse of the encoder sensor does not change even after the specified period of time has passed after the fusing pressure retraction motor started rotating. • With the fusing roller being pressed, the encoder pulse sensor does not change even after the specified period of time has passed after the fusing pressure retraction motor started rotating. • With the pressure roller being pressed, the pressure home sensor did not turn ON (pressed) even after the fusing retraction position sensor counted up the specified number of pulse after the fusing pressure retraction motor started rotating.
• Causes: Roller pressure welding alienation sensor (PS55) Fusing pressure retraction motor (M29) Printer control board (PRCB) Fusing unit
• Remedy: 1 Check the M29 connector for proper connection and correct as necessary. 2 PS55 I/O check, sensor check 3 M29 operation check PRCB CN8-3 to 4 C-16 4 Change M29 5 Change fusing unit 6 Change PRCB

• Code: C3102
• Description: Fusing roller failure to turn • When the IH power supply is turned ON, pulse signals are not input either of the heating roller rotation sensor within a predetermined period of time.
• Causes: Heating roller rotation sensor/1 (PS56) Fusing motor (M30) Printer control board (PRCB) Fusing unit
• Remedy: 1 Check the fusing unit for proper installation and correct as necessary. 2 Check the M30 connector for proper connection and correct as necessary. 3 PS56 I/O check, sensor check PRCB CN22-12 (ON) C-17 4 M30 operation check PRCB CN9-3 (REM) PRCB CN9-6 (LOCK) K-10 5 Change M30 6 Change fusing unit 7 Change PRCB

• Code: C3201
• Description: Fusing motor failure to turn • The motor lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Causes: Fusing motor (M30) Printer control board (PRCB)
• Remedy: 1 Check the M30 connector for proper connection and correct as necessary. 2 Check the loading status of the fusing unit drive, and correct the error as necessary. 3 Check the fusing unit, PRCB for proper connection and correct or change as necessary. 4 M30 operation check PRCB CN9-3 (REM) PRCB CN9-6 (LOCK) K-10 5 Change M30 6 PRCB ICP16 conduction check 7 Change PRCB

• Code: C3202
• Description: Fusing motor turning at abnormal timing • The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary.
• Causes: Fusing motor (M30) Printer control board (PRCB)
• Remedy: 1 Check the M30 connector for proper connection and correct as necessary. 2 Check the loading status of the fusing unit drive, and correct the error as necessary. 3 Check the fusing unit, PRCB for proper connection and correct or change as necessary. 4 M30 operation check PRCB CN9-3 (REM) PRCB CN9-6 (LOCK) K-10 5 Change M30 6 PRCB ICP16 conduction check 7 Change PRCB