• Code: C255C
• Description: TCR sensor adjustment failure
  • TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Remedy: 1 Reinstall developing unit. 3 Reinstall toner bottle. 4 Check the contact of developing unit for proper connection and correct as necessary. 5 Check the connector between TCRSB CN29-relay CN28-PRCB CN24 for proper connection and correct as necessary. 6 Check the connector between M3-PRCB CN8 for proper connection and correct as necessary. 7 Check the connector between M4-relay CN13-PRCB CN8 for proper connection and correct as necessary. 8 M3 operation check. 9 M4 operation check. 10 Change developing unit. 11 Change TCRSB. 12 Change PRCB.

• Code: C2564
• Description: TCR sensor failure
  • Alarm signals for a TCR sensor are detected. This detection is used for detecting disconnection of TCR sensor board (TCRSB) connector.
• Remedy: 1 Reinstall developing unit. 3 Reinstall toner bottle. 4 Check the contact of developing unit for proper connection and correct as necessary. 5 Check the connector between TCRSB CN29-relay CN28-PRCB CN24 for proper connection and correct as necessary. 6 Check the connector between M3-PRCB CN8 for proper connection and correct as necessary. 7 Check the connector between M4-relay CN13-PRCB CN8 for proper connection and correct as necessary. 8 M3 operation check. 9 M4 operation check. 10 Change developing unit. 11 Change TCRSB. 12 Change PRCB.

• Code: C2650
• Description: Main backup media access error
  • When an error is detected at the data reading process. • The machine writes and reads data, and judges that the data has error. Then the machine performs the same process and judges again that the data has error. • When counter values are read, error is detected. • The machine detects that it does not have EEPROM.
• Remedy: 1 Reboot the machine. 2 Check the EEPROM on the PRCB for proper connection and correct as necessary. 3 Change PRCB. 4 Change EEPROM.

• Code: C3421
• Description: Fusing heaters trouble (center)
  • Detected temperature of the heating roller thermistor (TH2; center) does not go up a given range of temperature even after a lapse of given period of time at warm up. • The warm-up is not completed even after the set period of time has elapsed after the warm-up is started.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 4 Change fusing unit. 6 Change PRCB. 7 Change DCPU.

• Code: C3423
• Description: Fusing heaters trouble (edge)
  • Detected temperature of the heating roller thermistor (TH2; edge) does not go up a given range of temperature even after a lapse of given period of time at warm up. • The warm-up is not completed even after the set period of time has elapsed after the warm-up is started.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 4 Change fusing unit. 6 Change PRCB. 7 Change DCPU.

• Code: C3721
• Description: Fusing abnormally high temperature detection (center)
  • Detected temperature of the heating roller thermistor (TH2; center) goes beyond a given temperature for a given period of time consecutively.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change PRCB. 6 Change DCPU.

• Code: C3723
• Description: Fusing abnormally high temperature detection (edge)
  • Detected temperature of the heating roller thermistor (TH2; edge) goes beyond a given temperature for a given period of time consecutively.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change PRCB. 6 Change DCPU.

• Code: C3821
• Description: Fusing abnormally low temperature detection (center)
  • Detected temperature of the heating roller thermistor (TH2; center) goes below a given temperature for a given period of time consecutively after warm up is completed.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change PRCB. 6 Change DCPU.