• Code: H7-10
• Description: Recovery error from low fuser temp. (TH_UM_AD2)
  The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature.
• Causes: Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. HL control PWB trouble. Power unit trouble.
• Remedy: Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the HL control PWB. Replace the power unit. Use SIM5-2 to check the flashing operation of the heater lamp.

• Code: H7-12
• Description: Recovery error from low fuser temp. (TH_US)
  The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature.
• Causes: Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. HL control PWB trouble. Power unit trouble.
• Remedy: Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the HL control PWB. Replace the power unit. Use SIM5-2 to check the flashing operation of the heater lamp.

• Code: L1-00
• Description: Scanner feed trouble
  Scanner feed is not completed within the specified time.
• Causes: Scanner unit trouble. SCU PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
• Remedy: Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.

• Code: L2-10
• Description: CCD cooling fan motor trouble
  The lock signal is detected during rotation of the fan / The non-lock state is detected when the motor is not rotated in booting
• Causes: Fan motor trouble, fan motor related harness and circuit trouble.
• Remedy: Check the fan motor related circuits (SCNcnt PWB) and their harness and connector.

• Code: L3-00
• Description: Scanner return trouble
  Scanner return is not completed within the specified time.
• Causes: Scanner unit trouble SCU PWB trouble Harness and connector connection trouble Scanner home position sensor trouble Scanner motor trouble
• Remedy: Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.

• Code: L4-01
• Description: Main motor lock trouble
  The motor lock signal is detected during rotation of the main motor (MM/MM2)
• Causes: Main motor (MM/MM2) lock trouble. Connection failure or disconnection of the connector and the harness. Control circuit trouble.
• Remedy: Use Sim. 6-1 to check the operation of the main motor (MM/MM2) lock. Check the harness and the connector. (between the PCU PWB and the motor, between the HL PWB and the motor)

• Code: L4-02
• Description: Main motor 2 lock trouble
  The lock signal is not detected within 1 sec when the paper feed motor is rotated in warming up or in canceling a paper jam.
• Causes: Paper feed motor trouble. Harness connection trouble between the PCU PWB and the paper feed motor. Control circuit trouble.
• Remedy: Use SIM6-1 to check the operation of the paper feed motor. Check connection of the connector and the harness between the PCU PWB and the toner paper feed motor

• Code: L4-03
• Description: Fusing motor lock trouble
  The motor lock signal is detected during rotation of the fusing motor.
• Causes: Fusing motor trouble Fusing motor harness and connector connection trouble PCU PWB trouble
• Remedy: Use SIM6-1 to check the operation of the fusing motor. Replace the Fusing motor. Check connection of the fusing motor harness and the connection. Replace the PCU PWB.