• Code: C5103
• Description: Transport motor’s turning at abnormal timing
  • The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 Check the connector between M1-PRCB CN14 for proper connection and correct as necessary. 2 Check M1 for proper drive coupling and correct as necessary. 3 M1 operation check PRCB CN14-2 (REM) PRCB CN14-5 (LOCK) C-2 to 5. 4 Change M1. 5 Change PRCB.

• Code: C5351
• Description: Power supply cooling fan motor’s failure to turn
  • The fan lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 Check the connector between FM1-PRCB CN13 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM1 operation check PRCB CN13-3 (LOCK) J-20 4 Change FM1. 5 PRCB ICP3 conduction check. 6 Change PRCB.

• Code: C5354
• Description: Exhaust fan motor’s failure to turn
  • The fan lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 Check the connector between FM3-relay CN88-PRCB CN15 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM3 operation check PRCB CN15-8 (LOCK). 4 Change FM3. 5 Change PRCB.

• Code: C5355
• Description: Cooling fan motor/3’s failure to turn
  • The fan lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 Check the connector between FM2-relay CN18-PRCB CN13 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM2 operation check PRCB CN13-6 (LOCK). 4 Change FM2. 5 Change PRCB.

• Code: C5370
• Description: MFP control board cooling fan motor’s failure to turn
  • The fan lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 Check the FM7 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM7 operation check MFPB PJ26-3 (LOCK). 4 Change FM17. 5 Change MFPB.

• Code: C5372
• Description: MFP control board CPU temperature failure
  • Temperature failure of CPU on the MFP board was detected.
• Remedy: 1 Reboot the machine. 2 Check the fan connector for proper connection and correct as necessary. 3 Check the fan for possible overload and correct as necessary. 4 Fan motor operation check MFPB PJ20 L-24. 5 Change MFPB.

• Code: C5501
• Description: AC signal abnormality
  • Signal is not detected for a given period of interval when AC frequency is measured with the power switch ON or when fusing heater is turned ON/OFF.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the fusing unit, DCPU and PRCB for proper connection and correct or change as necessary. 3 Change fusing unit. 4 Change PRCB. 5 Change DCPU.

• Code: C5601
• Description: Engine control malfunction
  • Engine control malfunction is detected with port monitor control.
• Remedy: 1 Check the connectors on the PRCB for proper connection and correct or change as necessary. 2 Rewrite the firmware. 3 Change PRCB.