Code :

Code: L4-35
Description: Fusing cooling fan trouble
Causes: Fusing cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: Use SIM6-2 to check that the fan is actually rotating. Replace the fusing cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-40
Description: Ozone fan trouble
Causes: Harness/connector trouble between the PCU PWB and the fan motor. PCU PWB trouble. Fan motor trouble. The fan does not rotate because of the other trouble (No power supply to the fan motor)
Remedy: Use SIM6-2 to check the operation of the fan motor. Replace the fan motor / the PCU PWB. Check connection of the connector and the harness.

Code: L4-43
Description: Paper exit cooling fan trouble
Causes: Paper exit cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: Replace the fan. Replace the PCU PWB. Check the connector and the harness. Use SIM6-2 to check that the fan is actually rotating.

Code: L4-70
Description: Toner motor lock trouble
Causes: Toner motor abnormality Improper connection or disconnection of the toner motor and the harness. PCU PWB abnormality
Remedy: Use SIM 10-1 to check the toner motor operations. Check connection of the toner motor harness/ connector. Replace the toner motor. Replace the PCU PWB.

Code: L6-10
Description: Polygon motor trouble
Causes: Polygon motor trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: Use SIM61-1 to check the operation of the polygon motor. Check connection of the connector and the harness. Replace the LSU. Replace the PCU PWB.

Code: L8-02
Description: Full wave signal width abnormality
Causes: PCU PWB trouble. Power unit trouble. Harness trouble
Remedy: Replace the PCU PWB. Replace the power unit. Check connection of the connector and the harness.

Code: L8-20
Description: Power controller communication trouble
Causes: PCU PWB - MFPC PWB connector connection trouble. Broken connector pin of the PCU PWB of the MFPC PWB.
Remedy: Replace the PCU PWB. Check connector connection between the PCU PWB and the MFPC PWB. Check the ground of the main unit.

Code: P1-00
Description: PCI communication error
Causes: Communication error between the MFPC PWB and the PCI. Connection failure of connectors and harness between the MFPC PWB and the PCI. MFPC PWB trouble. PCI control PWB trouble.
Remedy: Check connection of the harness and connectors between the MFPC PWB and the PCI. Check the MFPC PWB, and replace if necessary. (Refer to the necessary procedures after replacement of the MFPC PWB in the Service Manual, and perform the procedures.) Check the PCI control PWB, and replace if necessary.