• Code: 3826
• Description: Fusing abnormally low temperature (Center of the heating roller)
  The fusing temperature sensor/1 (TEM1: center of the heating side) continues to detect a temperature lower than a predetermined one for a predetermined period of time after warm-up is complete.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). - - 2 Check the open/close operation of the upper right door. - - 3 Check the fusing unit -PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. - - 4 Replace the fusing unit - - 5 Replace DCPS - - 6 Replace PRCB

• Code: 3921
• Description: Fusing sensor wire breaks abnormality (Center of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/1 (TEM1: main of the heating side) voltage does not increase by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: main of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). - - 2 Check the open/close operation of the upper right door. - - 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. - - 4 Replace the fusing unit - - 5 Replace DCPS - - 6 Replace PRCB

• Code: 3922
• Description: Fusing sensor wire breaks abnormality (Edge of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/2 (TEM2) voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Fusing temperature sensor/2 (TEM2) • DC power supply (DCPS) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). - - 2 Check the open/close operation of the upper right door. - - 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. - - 4 Replace the fusing unit - - 5 Replace DCPS - - 6 Replace PRCB

• Code: 3926
• Description: Fusing sensor wire breaks abnormality (Middle of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/1 (TEM1: center of the heating side) voltage does not decrease by predetermined steps (temperature rise) within a predetermined time.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). - - 2 Check the open/close operation of the upper right door. - - 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. - - 4 Replace the fusing unit - - 5 Replace DCPS - - 6 Replace PRCB

• Code: 4002
• Description: LD control communication error
  When the LD control board (PHRYB) is receiving data, a communication error is detected.
• Causes: • PH unit • LD control board (LDCB) • Printer control board (PRCB)ly (
• Remedy: 1 Check the connector between PH unit-relay CN73- PRCB CN5 for proper connection and correct as necessary. - - 2 Replace the PH unit - - 3 Replace PRCB

• Code: 4091
• Description: Engine communication error
  • The engine resends the maximum number of retries (five times) after a retry sequence has occurred. • Communication with the CTL is interrupted for one min. or longer during a stabilization sequence.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Remedy: 1 Reboot the machine. - - 2 Check the flat cable between MFPB CN16C-PRCB CN4 for proper connection and correct as necessary. - - 3 Check the connected portion of the flat cable for any curled pattern or any scratches, and replace it if necessary. - - 4 Replace MFPB - - 5 Replace PRCB

• Code: 4092
• Description: I/F communication error (CNT detection)
  The communication between the MFPB and PRCB can not be completed even when elapsed a given period of time.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)ntrol
• Remedy: 1 Reboot the machine. - - 2 Check the flat cable between MFPB CN16C-PRCB CN4 for proper connection and correct as necessary. - - 3 Check the connected portion of the flat cable for any curled pattern or any scratches, and replace it if necessary. - - 4 Replace MFPB 5 Replace PRCB

• Code: 4101
• Description: Polygon motor malfunction
  • The polygon motor fails to turn stably even after the lapse of a given period of time after activating and changing rotation speed the polygon motor. • Motor lock signal detects HIGH for a given period time consecutively during the polygon motor is rotating.
• Causes: • PH unit • Printer control board (PRCB)
• Remedy: 1 Check the connector between PH unit- relay CN72- PRCB CN6 for proper connection and correct as necessary. - - 2 Replace the PH unit - - 3 PRCB F3 conduction check - - 4 Replace PRCB