• Code: L1-00
• Description: Scanner feed trouble
• Causes: Scanner feed is not completed within the specified time. Scanner unit trouble. MFPC 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 MFPC PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.

• Code: L3-00
• Description: Scanner return trouble
• Causes: Scanner return is not completed within the specified time. Scanner unit trouble. MFP 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 MFP PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.

• Code: L4-02
• Description: Paper feed motor trouble
  A lock signal is not detected within the specified time in ON operation of the paper feed motor after warming-up or canceling a jam.
• Causes: Paper feed motor trouble Paper feed motor harness and connector connection trouble MFPC PWB trouble
• Remedy: Use SIM6-1 to check the operation of the paper feed motor. Replace the paper feed motor. Check connection of the paper feed motor harness and the connector. Replace theMFPC PWB.

• Code: L4-03
• Description: Fusing motor lock trouble
• Causes: The motor lock signal is detected during rotation of the fusing motor. Fusing motor trouble. MFPC PWB trouble. Connection trouble of the connector and the harness.
• Remedy: Use Sim6-1 to check the operation of the fusing motor. Replace the fusing motor. Replace the MFPC PWB. Check connection of the connector and the harness.

• Code: L4-04
• Description: Developing motor trouble (BLACK)
• Causes: The motor lock signal is detected during rotation of the developing motor. Developing motor trouble. Harness and connector connection trouble. MFPC PWB trouble Developing unit trouble.
• Remedy: Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the connectors and the harness. Replace the MFPC PWB. Replace the developing motor. Replace the developing unit.

• Code: L4-06
• Description: Transfer unit lift trouble
• Causes: Transfer unit position sensor trouble. MFPC PWB trouble. Connection trouble of the connector and the harness. Transfer unit separation clutch operation trouble. Primary transfer belt unit is not installed.
• Remedy: Use SIM6-3 to check the separating operation of the transfer unit. Install the primary transfer belt unit. Replace the transfer unit position sensor. Replace the MFPC PWB. Harness and connector connection trouble. Replace the transfer unit separation clutch.

• Code: L4-17
• Description: Drum motor lock trouble
• Causes: Drum motor trouble Connection trouble of the connector and the harness between MFPC PWB and the drum motor MFPC PWB trouble
• Remedy: Check the operation of the drum motor with SIM 25-01 Check the connection of the connector and the harness between MFPC PWB and the drum motor Replace the drum motor Replace the MFPC PWB

• Code: L4-32
• Description: Power source cooling fan trouble
• Causes: The fan operation signal is not detected within the specified time in the power cooling fan operation. Power cooling fan trouble. MFPC PWB trouble. Connection trouble of the connector and the harness.
• Remedy: Use SIM6-2 to check the rotating operation of the fan. Replace the power cooling fan. Replace the MFPC PWB. Check/replace the connector or the harness.