• Code: C225C
• Description: K PC drum 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 M18 connector for proper connection and correct as necessary. 2 Check the M18 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 M18 operation check PRCB CN13PRCB-15 (REM) PRCB CN13PRCB-18 (LOCK) K-10. 5 Change M18. 6 Change PRCB.

• Code: C2351
• Description: K toner suction fan 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 FM8 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM8 operation check PRCB CN10PRCB-10 (REM) PRCB CN10PRCB-12 (LOCK) K-5. 4 Change FM8. 5 Change PRCB.

• Code: C2352
• Description: Color toner suction fan 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 FM7 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM7 operation check PRCB CN10PRCB-7 (REM) PRCB CN10PRCB-9 (LOCK) K-5. 4 Change FM7. 5 Change PRCB.

• Code: C2353
• Description: IU cooling fan 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 FM15 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM15 operation check REYB PH CN5REYB PH-1 (REM) REYB PH CN5REYB PH-3 (LOCK) B-7. 4 Change FM15. 5 Change REYB/PH. 6 Change PRCB.

• Code: C2354
• Description: Rear side cooling fan 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 FM16 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM16 operation check PRCB CN26PRCB-2 (REM) PRCB CN26PRCB-3 (LOCK) C-16. 4 Change FM16. 5 Change PRCB.

• Code: C2451
• Description: Release new transfer belt unit
  • A new installation is not detected when a new transfer cleaner unit (image transfer belt unit) is installed.
• Remedy: 1 Reinstall unit. 2 Check there is a short circuit in the fuse of the transfer belt unit. 3 Check the PRCB connector for proper connection and correct as necessary. 4 Change PRCB.

• Code: C2551
• Description: Abnormally low toner density detected cyan TCR sensor
  • When sampling data is determined in TC ratio calculation control, TCR sensor output is higher than a predetermined value for a predetermined number of times in a row even though there is toner in the sub hopper.
• Remedy: 1 Perform image troubleshooting procedure if image density is low. 2 Clean the TCR sensor window on the underside of the imaging unit if dirty 3 Reinstall imaging unit. 4 Reinstall toner cartridge. 5 M9, M10, M11 operation check (At this time, IU must be non-installation.) M9: PRCB CN16PRCB-1 to 4 M10: PRCB CN16PRCB-5 to 8 M11: PRCB CN16PRCB-9 to 12 C-22 to 23. 6 M13, M14 operation check M13: PRCB CN17PRCB-5 to 8 M14: PRCB CN17PRCB-9 to 12 K-1. 7 If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them. 8 Change imaging unit. 9 Change PRCB.

• Code: C2552
• Description: Abnormally high toner density detected cyan TCR sensor
  • TC ratio in the developing unit which is determined by Toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively.
• Remedy: 1 Clean the TCR sensor window on the underside of the imaging unit if dirty. 2 Reinstall imaging unit. 3 Reinstall toner cartridge. 4 Change imaging unit. 5 Change PRCB. 6 Change sub hopper unit.