Code :

Code: L3-00
Description: Mirror return trouble. Mirror return is not completed within the specified time
Causes: Mirror unit trouble. The mirror wire is disengaged. Circuit trouble.
Remedy: Use Sim. 1-1 to check the operation of the mirror. Check the mirror motor related circuits (SCN-Mother PWB, SCNCNT PWB, MHP sensor PWB).

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: Drum motor lock trouble. When warming up, the paper feed motor is rotated when canceling a jam, the lock signal is not detected within 1sec.
Causes: Paper feed motor trouble. Harness connection trouble between the PCU PWB and the paper feed motor. Control circuit trouble.
Remedy: Check the paper feed motor operation with Sim. 6-1. Check connection of the connector and the harness between the PCU PWB and the 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. Harness connection trouble between the PCU PWB and the developing motor. Control circuit trouble.
Remedy: Check the fusing motor operation with Sim. 6-1. Check connection of the harness and the connector between the PCU PWB and the developing motor.

Code: L4-04
Description: Developing motor trouble. The motor lock signal is detected during rotation of the developing motor
Causes: Developing motor trouble. Harness connection trouble between the PCU PWB and the developing motor. Control circuit trouble.
Remedy: Check the developing motor operation with Sim. 25-1. Check connection of the connector and the harness between the PCU PWB and the developing motor.

Code: L4-08
Description: Waste toner transport pipe lock. Waste toner lock is detected during rotation of the drum motor.
Causes: Waste toner transport pipe lock. (clogging) Waste toner lock sensor trouble. Waste toner lock detection mechanism trouble.
Remedy: Use Sim. 6-1 to check the operations of the drum motor. Check for clogging in the waste toner transport pipe. Check the waste toner lock sensor.

Code: L4-14
Description: Toner cartridge motor lock trouble. Though the toner cartridge motor is rotated for a certain time, the toner cartridge motor rotation sensor count value does not exceed the threshold value
Causes: Toner cartridge motor trouble. Toner cartridge motor rotation sensor trouble. Harness connection trouble between the PCU PWB and the toner cartridge motor. Harness trouble between the PCU PWB and the toner cartridge motor rotation sensor. Toner cartridge trouble.
Remedy: Use Sim. 10-1 to check the operation of the toner cartridge motor. Use Sim. 10-3 to check the operation of the toner cartridge motor rotation sensor. Check the harness and the connector between the PCU PWB and the toner cartridge motor. Check the harness and the connector between the PCU PWB and the toner cartridge motor rotation sensor. Replace the toner cartridge.

Code: L4-15
Description: Fusing front PG control error. FPGHP is not changed over during the initializing operation of the fusing front PG motor
Causes: Fusing front PG motor trouble. FPGHP sensor trouble. PCU PWB trouble. Harness connection trouble between the PCU PWB and the fusing front PG motor. Harness connection trouble between the PCU PWB and the FPGHP.
Remedy: Use Sim. 6-1 to check the operation of the fusing front PG motor. Use Sim. 30-1 to check the FPGHP sensor. Check the harness and the connector between the PCU PWB and the fusing front PG motor. Check the harness and the connector between the PCU PWB and the FPGHP.