• Code: C4770 ... C4783
• Description: The printer control board (PRCB) is faulty.
• Remedy: 1 When the error is displayed after the memory check, remove and insert the DIMM0 and DIMM1 again to recheck (C4765). 2 Change PRCB.

• Code: C5102
• Description: Main motor’s failure to turn
  • The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.
• Remedy: 1 Check the M1 connector for proper connection and correct as necessary. 2 Check M1 for proper drive coupling and correct as necessary. 3 Check the MFPB connector for proper connection and correct as necessary. 4 M1 operation check MFPB CNDM1-5 (REM) MFPB CNDM1-8 (LOCK) L-2. 5 Change MFPB. 6 Change DCPU.

• Code: C5103
• Description: Main motor turning at abnormal timing
  • The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary.
• Remedy: 1 M1 operation check MFPB CNDM1-5 (REM) MFPB CNDM1-8 (LOCK) L-2. 2 Change MFPB. 3 Change DCPU.

• Code: C5351
• Description: Power supply cooling fan motor/ 1’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 of motor for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M8 operation check MFPB CNLV3-2 (ON) MFPB CNLV3-3 (LOCK) C-25. 4 Change DCPU.

• Code: C5353
• Description: Cooling fan motor 2’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 of motor for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M22 operation check MFPB CNRE-3 (ON) MFPB CNR2FAN-6 (LOCK) L-8. 4 Change MFPB.

• Code: C5354
• Description: Ozone ventilation 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 of motor for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M14 operation check MFPB CNLP-9 (ON) MFPB CNLP-11 (LOCK) C-10. 4 Change MFPB.

• 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 of motor for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M23 operation check MFPB CNR2FAN-4 (ON) MFPB CNR2FAN-6 (LOCK) L-3. 4 Change MFPB.

• Code: C5357
• Description: Cooling fan motor/1’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 of motor for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M12 operation check MFPB CNR2FAN-7 (ON) MFPB CNR2FAN-9 (LOCK) L-3. 4 Change MFPB.