• Code: C2254
• Description: Color PC 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 M2 connector for proper connection and correct as necessary. 2 Check the M2 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 M2 operation check PRCB CN35PRCB-4 (REM) PRCB CN35PRCB-7 (LOCK) D-22. 5 Change M2. 6 Change PRCB.

• Code: C225D
• Description: Color dev. unit engagement/disengagement failure
  • The gears remain disengaged after the lapse of a predetermined period of time after the engagement operation is started by the color dev. unit engaged motor. • The gears remain engaged after the lapse of a predetermined period of time after the disengagement operation is started by the color dev. unit engaged motor.
• Remedy: 1 Check the M10 connector for proper connection and correct as necessary. 2 Check the M10 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 PS26 I/O check PRCB CN39PRCB-18 (ON) D-24. 5 M10 operation check PRCB CN39PRCB-12 (REM) D-24. 6 Change M10. 7 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 FM3 connector for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM3 operation check PRCB CN30PRCB-7 (ON) PRCB CN30PRCB-9 (LOCK) K-7 to 8. 4 Change FM3. 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
  • TC ratio in the developing machine, which is determined by toner replenishing amount control mechanism, is 4 % or less for a given number of times consecutively.
• Remedy: 1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 M3, M4 operation check (At this time, IU must be non-installation.) PRCB CN39PRCB-1 to 4 (M3) PRCB CN39PRCB-5 to 8 (M4) D-23. 4 Change imaging unit. 5 Change PRCB.

• Code: C2552
• Description: Abnormally high toner density detected cyan TCR sensor
  • TC ratio in the developing machine, which is determined by Toner replenishing amount control mechanism, is 11 % or more for a given number of times consecutively.
• Remedy: 1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 Change imaging unit. 4 Change PRCB.

• Code: C2553
• Description: Abnormally low toner density detected magenta TCR sensor
  • TC ratio in the developing machine, which is determined by toner replenishing amount control mechanism, is 4 % or less for a given number of times consecutively.
• Remedy: 1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 M3, M4 operation check (At this time, IU must be non-installation.) PRCB CN39PRCB-1 to 4 (M3) PRCB CN39PRCB-5 to 8 (M4) D-23. 4 Change imaging unit. 5 Change PRCB.

• Code: C2554
• Description: Abnormally high toner density detected magenta TCR sensor
  • TC ratio in the developing machine, which is determined by toner replenishing amount control mechanism, is 11 % or more for a given number of times consecutively. • When the connector of the TCR sensor is disconnected.
• Remedy: 1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 Change imaging unit. 4 Change PRCB.