• Code: C3722
• Description: Fusing abnormally high temperature detection (Edge of the heating roller)
  • The heating roller temperature sensor/3 continues to detect a temperature higher than a predetermined one for a predetermined period of time. • The signal is turned ON to activate the hard ratchet at the edges of the heating side.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, MFPB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1, TEMS2 or TEMS3 - - 5 Change fusing unit - - 6 Change IHPU - - 7 Change PRCB - - 8 Change REDB

• Code: C3724
• Description: Fusing abnormally high temperature detection (soaking side)
  • The soaking roller thermistor/1 continues to detect a temperature higher than a predetermined one for a predetermined period of time. • The signal is turned ON to activate the hard ratchet on the soaking side.
• Causes: Fusing unit IH power supply (IHPU) DC power supply (DCPU) 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, IHPU, MFPB and DCPU for proper connection and correct or change as necessary. - - 4 Change fusing unit - - 5 Change IHPU - - 6 Change PRCB - - 7 Change DCPU

• Code: C3725
• Description: Fusing abnormally high temperature detection (NS sensor)
  • The heating roller temperature sensor/1 continues to detect a temperature higher than a predetermined one for a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, MFPB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1, TEMS2 or TEMS3 - - 5 Change fusing unit - - 6 Change IHPU - - 7 Change PRCB - - 8 Change REDB

• Code: C3822
• Description: Fusing abnormally low temperature detection (Edge of the heating roller)
  • The heating roller thermistor/2 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, PRCB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1 (C3825) - - 5 Change fusing unit - - 6 Change IHPU - - 7 PRCB ICP17 conduction check - - 8 Change PRCB - - 9 Change REDB -

• Code: C3824
• Description: Fusing abnormally low temperature detection (soaking side)
  • The soaking roller thermistor/1 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: Fusing unit IH power supply (IHPU) DC power supply (DCPU) 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, IHPU, PRCB and DCPU for proper connection and correct or change as necessary. - - 4 Change fusing unit - - 5 Change IHPU - - 6 Change PRCB - - 7 Change DCPU

• Code: C3825
• Description: Fusing abnormally low temperature detection (NC sensor)
  • The heating roller temperature sensor/1 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, PRCB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1 (C3825) - - 5 Change fusing unit - - 6 Change IHPU - - 7 PRCB ICP17 conduction check - - 8 Change PRCB - - 9 Change REDB -

• Code: C3921
• Description: Fusing sensor wire breaks detection (Center of the heating roller)
  • At the warm-up stage, the heating roller temperature sensor/2 voltage does not decrease by predetermined steps (temperature rise) within a predetermined time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, PRCB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1, TEMS2 or TEMS3 - - 5 Change fusing unit - - 6 Change IHPU - - 7 PRCB ICP17 conduction check - - 8 Change PRCB - - 9 Change REDB

• Code: C3922
• Description: Fusing sensor wire breaks detection (Edge of the heating roller)
  • At the warm-up stage, the heating roller temperature sensor/3 voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, IHPU, PRCB and REDB for proper connection and correct or change as necessary. - - 4 Change TEMS1, TEMS2 or TEMS3 - - 5 Change fusing unit - - 6 Change IHPU - - 7 PRCB ICP17 conduction check - - 8 Change PRCB - - 9 Change REDB