• Code: C3751
• Description: Abnormal High Temp. (Heater)
  • The temperatures of the Heating Roller Thermistor/1 (TH1) and the Heating Roller Thermistor/ 2 (TH3) are higher than a given level of degree for 1 second or more uninterruptedly. • The Heater Relay is OFF.
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M and PU1 for proper connection and correct or change as necessary. 3 Change Fusing Unit. 4 Change PWB-M. 5 Change PU1.

• Code: C3752
• Description: Abnormal High Temp. (Press)
  • The temperature of the Fusing Pressure Roller Thermistor/1 (TH2) is higher than a given level of degree for 1 second or more uninterruptedly before the Heater temperature control starts. • The temperature of the Fusing Pressure Roller Thermistor/1 (TH2) is higher than a given level of degree for 1 second or more uninterruptedly after the Heater temperature control starts.
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M and PU1 for proper connection and correct or change as necessary. 3 Change Fusing Unit. 4 Change PWB-M. 5 Change PU1.

• Code: C3851
• Description: Abnormal Low Temp. (Heater)
  • The temperature of the Heating Roller Thermistor/1 (TH1) is lower than a given level of degree for 1 second or more uninterruptedly during Ready mode, Low Power mode or printing. • The temperature of the Heating Roller Thermistor/2 (TH3) is lower than a given level of degree for 1 second or more uninterruptedly during Ready mode, Low Power mode or printing.
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M and PU1 for proper connection and correct or change as necessary. 3 Change Fusing Unit. 4 Change PWB-M. 5 Change PU1.

• Code: C3852
• Description: Abnormal Low Temp. (Press)
  • The temperature of the Fusing Pressure Roller Thermistor /1 (TH2) is lower than a given level of degree for 1 second or more uninterruptedly during Ready mode, Low Power mode or printing.
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M and PU1 for proper connection and correct or change as necessary. 3 Change Fusing Unit. 4 Change PWB-M. 5 Change PU1.

• Code: C3A01
• Description: Paper Stuck to Fuser Heater Roller
  • The temperature of the Heating Roller Thermistor /1 (TH1) goes down by a given level of degree compared to the temperature of a given period of time before when the paper passes on the Timing Roller and blocks the Exit Sensor (PC2).
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M for proper connection and correct or change as necessary. 3 PC2 I/O check, Sensor check PWB-M CNTH2-8 (ON) C-13. 4 Change Fusing Unit. 5 Change PWB-M. 6 Change PU1.

• Code: C3A02
• Description: Paper Stuck to Fuser Pressure Roller
  • The temperature of the Fusing Pressure Roller Thermistor /1 (TH2) goes down by a given level of degree compared to the temperature of a given period of time before when the paper passes on the Timing Roller and blocks the Exit Sensor (PC2).
• Remedy: 1 Check the Fusing Unit for correct installation (whether it is secured in position). 2 Check the Fusing Unit, PWB-M for proper connection and correct or change as necessary. 3 PC2 I/O check, Sensor check PWB-M CNTH2-8 (ON) C-13. 4 Change Fusing Unit. 5 Change PWB-M. 6 Change PU1.

• Code: C4151
• Description: Polygon Motor/C failure to turn
  • The Polygon motor fails to turn stably even after the lapse of a given period of time after activating the Polygon motor.
  • Motor Lock signal detects H for a given period time consecutively during the Polygon motor is rotating.
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH Unit. 3 Change PWB-D. 4 Change PWB-M.

• Code: C4152
• Description: Polygon Motor/M failure to turn
• Remedy: 1 Check the connector for proper connection and correct as necessary. 2 Change PH Unit. 3 Change PWB-D. 4 Change PWB-M.