• Code: H4-30
• Description: Thermistor differential input trouble (TH_UM)
  TH_UM_AD1 and TH_UM_AD2 do not exceed the specified level (50 count with the AD value) within 1minute after HL_UM is turned on.
• Causes: HL_UM does not turn on. Thermistor trouble, harness trouble, PCU PWB trouble
• Remedy: 1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the PCU PWB thermistor input circuit section. 3) If it is not lighted, check for the heater lamp disconnection and the thermostat breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.

• Code: H5-01
• Description: 5 continuous detection of POD1 notreached jam
  5 continuous detection of POD1 not-reached jam
• Causes: The fusing jam is not removed completely. (Jam paper remains.) POD1 sensor trouble or harness connection trouble Fusing unit installation trouble
• Remedy: Case 1 Cause The fusing jam is not removed completely. (Jam paper remains.) Check and remedy Check the fusing section for jam paper. (winding, etc.) Case 2 Cause POD1 sensor trouble or harness connection trouble Check and remedy Check the POD1 sensor harness. Use SIM14 to cancel the trouble. Case 3 Cause Fusing unit installation trouble Check and remedy Check the fusing unit installation.

• Code: L1-00
• Description: Mirror feed trouble
  Mirror feed is not completed within the specified time.
• Causes: Mirror unit trouble, mirror wire disengagement
• Remedy: Use SIM1-1 to check the mirror operation.

• Code: L3-00
• Description: Mirror return trouble
  Mirror return is not completed within the specified time.
• Causes: Mirror unit trouble, mirror wire disengagement
• Remedy: Use SIM1-1 to check the mirror operation.

• Code: L4-02
• Description: Paper feed motor lock trouble
  When the paper feed motor is rotated in warming up or in canceling a jam and the lock signal is not detected within 1sec.
• Causes: Paper feed motor trouble, harness connection trouble between PCU PWB and paper feed motor, control circuit trouble
• Remedy: Use SIM6-1 to check the paper feed motor operation. Check the harness and the connector between the PCU PWB and the paper feed motor.

• Code: L4-04
• Description: Developing motor trouble (BLACK)
  The motor lock signal is detected during rotation of the developing motor.
• Causes: Harness connection trouble between the PCU PWB and the developing motor. Developing motor trouble, control circuit trouble
• Remedy: Case 1 Cause Harness connection trouble between the PCU PWB and the developing motor. Check and remedy Check the harness and the connector between the PCU PWB and the developing motor. Case 2 Cause Developing motor trouble, control circuit trouble Check and remedy Use SIM25-1 to check the operation of the developing motor.

• Code: L4-05
• Description: Developing motor trouble (COLOR)
  The motor lock signal is detected during rotation of the developing motor.
• Causes: Harness connection trouble between the PCU PWB and the developing motor. Developing motor trouble, control circuit trouble
• Remedy: Case 1 Cause Harness connection trouble between the PCU PWB and the developing motor. Check and remedy Check the harness and the connector between the PCU PWB and the developing motor. Case 2 Cause Developing motor trouble, control circuit trouble Check and remedy Use SIM25-1 to check the operation of the developing motor.

• Code: L4-06
• Description: Transfer belt separation position sensor trouble
  When separating the primary transfer belt unit, change in the separation position sensor characteristics is not detected within the specified time.
• Causes: Harness connection trouble between the PCU PWB and the separation position sensor The belt position sensor is not interrupted or it is always interrupted. Belt separation clutch operation trouble The primary transfer belt unit is not installed.
• Remedy: Case 1 Cause Harness connection trouble between the PCU PWB and the separation position sensor Check and remedy Check the harness between the PCU PWB and the separation position sensor. Case 2 Cause The belt position sensor is not interrupted or it is always interrupted. Belt separation clutch operation trouble Check and remedy Use SIM6-3 to check the belt separation operation. Case 3 Cause The primary transfer belt unit is not installed. Check and remedy Install the primary transfer belt.