• Code: C2151
• Description: Secondary transfer roller pressure welding alienation
  • During a retraction operation of the 2nd image transfer roller, the 2nd image transfer welding alienation sensor cannot detect the 2nd image transfer roller at its retracted position within a predetermined period of time after the 2nd image transfer retraction motor starts rotating.
  • During a pressure operation of the 2nd image transfer roller, the 2nd image transfer welding alienation sensor cannot detect the 2nd image transfer roller at its pressed position within a predetermined period of time after the 2nd image transfer retraction motor starts rotating.
• Remedy: 1 Check the M5 connector for proper connection and correct as necessary. 2 Check the connector of M5 for proper drive coupling and correct as necessary. 3 PS36 I/O check, sensor check. 4 Change the right door assy. 5 Change PRCB.

• Code: C2152
• Description: Transfer belt pressure welding alienation
  • During a retraction operation of the transfer belt, the transfer belt retraction sensor cannot detect the transfer belt at its retracted position within a predetermined period of time after the transfer belt retraction clutch is turned ON.
  • During a pressure operation of the transfer belt, the transfer belt retraction sensor cannot detect the transfer belt at its pressed position within a predetermined period of time after the transfer belt clutch is turned ON.
• Remedy: 1 Check the M5 connector for proper connection and correct as necessary. 2 PS6 I/O check, sensor check. 3 CL3 operation check. 4 M2 operation check. 5 Change CL3. 6 Change M2. 7 Change PRCB.

• Code: C2164
• Description: PC charge malfunction
  • When electrostatic charge output is ON, electrostatic charge leak detection system continues to detect leaks for a predetermined period of time.
• Remedy: 1 Check the imaging unit for proper connection and correct as necessary. 2 Check the HV connector for proper connection and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 Change IU. 5 Change HV. 6 Change PRCB.

• Code: C2253
• Description: Color PC 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 M3 connector for proper connection and correct as necessary. 2 Check the M3 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 M3 operation check. 5 Change M2. 6 Change PRCB.

• 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 M3 connector for proper connection and correct as necessary. 2 Check the M3 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 M3 operation check. 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 M4 connector for proper connection and correct as necessary. 2 Check the M4 connector for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 PS19 I/O check, sensor check. 5 M4 operation check. 6 Change M4. 7 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 M6 operation check (At this time, IU must be non-installation.). 4 M7 operation check (At this time, IU must be non-installation.). 5 Change imaging unit. 6 Change PRCB.