• Code: C4154
• Description: Polygon motor rotation trouble (K)
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH unit. 3 Change PHREYB. 4 Change PRCB.

• Code: C4551
• Description: Laser malfunction (C)
  • SOS signal is not detected even after the lapse of a given period of time after staring the laser output. • SOS signal is not detected for a given period of time during printing or image stabilization adjustment.
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH unit. 3 Change PHREYB. 4 Change PRCB.

• Code: C4552
• Description: Laser malfunction (M)
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH unit. 3 Change PHREYB. 4 Change PRCB.

• Code: C4553
• Description: Laser malfunction (Y)
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH unit. 3 Change PHREYB. 4 Change PRCB.

• Code: C4554
• Description: Laser malfunction (K)
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH unit. 3 Change PHREYB. 4 Change PRCB.

• Code: C5102
• Description: Transport motor’s failure to turn
  • The motor lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• 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 PRCB connector for proper connection and correct as necessary. 4 M1 operation check PRCB CN34PRCB-10 (REM) PRCB CN34PRCB-13 (LOCK) D-22. 5 Change M1. 6 Change PRCB.

• 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 M1 connector for proper connection and correct as necessary. 2 Check M1 for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 M1 operation check PRCB CN34PRCB-10 (REM) PRCB CN34PRCB-13 (LOCK) D-22. 5 Change M1. 6 Change PRCB.

• 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 FM5 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM5 operation check PRCB CN30PRCB-11 (ON) PRCB CN30PRCB-12 (LOCK) K-8. 4 Change FM5. 5 Change DCPU. 6 Change PRCB.