• Code: C3823
• Description: Fusing abnormally low temperature detection (edge)
  • Detected temperature of the heating roller thermistor (TH2; edge) 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.

• Code: C4101
• Description: Polygon motor rotation trouble
  • The polygon motor (M5) fails to turn stably even after the lapse of a given period of time after activating the polygon motor. • Motor lock signal detects HIGH for a given period time consecutively during the polygon motor (M5) is rotating.
• Remedy: 1 Check the connector between PH unit- PRCB CN19, CN20 for proper connection and correct as necessary. 2 Change PH unit. 3 Change PRCB.

• Code: C4501
• Description: Laser malfunction
  • 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.
• Remedy: 1 Check the connector between PH unit- PRCB CN19, CN20 for proper connection and correct as necessary. 2 Change PH unit. 3 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 connector between M1-PRCB CN3 for proper connection and correct as necessary. 2 Check M1 for proper drive coupling and correct as necessary. 3 M1 operation check. 4 Change M1. 5 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 connector between M1-PRCB CN3 for proper connection and correct as necessary. 2 Check M1 for proper drive coupling and correct as necessary. 3 M1 operation check. 4 Change M1. 5 Change PRCB.

• Code: C5351
• Description: Power supply cooling fan motor’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 connector between FM1-relay CN95-PRCB CN3 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM1 operation check. 4 Change FM1. 5 Change PRCB.

• Code: C5356
• Description: Cooling fan motor’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 connector between FM2-relay CN44-PRCB CN5 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM2 operation check. 4 Change FM2. 5 PRCB ICP6 conduction check. 6 Change PRCB.

• Code: C5370
• Description: MFP control board cooling fan motor’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 connector between FM5-relay CN61-MFPB PJ26 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM5 operation check. 4 Change FM5. 5 Change MFPB.