Code :

Code: L4-34
Description: LSU cooling fan trouble
Causes: When the LSU cooling fan is operated, the fan operation signal is not detected within the specified time. LSU 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 LSU cooling fan. Replace the PCU PWB. Replace the LSUcnt PWB. Check connection of the connector and the harness.

Code: L4-35
Description: Fusing cooling fan trouble
Causes: The fan operation signal is not detected within the specified time in the fusing cooling fan operation. Fusing cooling fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy: Use SIM6-2 to check the rotating operation of the fan. Replace the fusing cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-45
Description: Toner cooling fan trouble (Toner cooling fan 1, 2)
Causes: When the toner cooling fan is operated, the fan operation signal is not detected within the specified time. Toner cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: After turning ON the power, check to confirm that the fan is rotating. Replace the toner cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-50
Description: Process fan trouble
Causes: The fan operation signal is not detected within the specified time in the process fan operation. Process fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy: Check that the fan is rotating after turning ON the power. Replace the process fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-56
Description: Rear cooling fan trouble
Causes: The fan operation signal is not detected within the specified time in the rear cooling fan operation. Rear cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: Check that the fan is rotating after turning ON the power. Replace the rear cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-57
Description: Toner cooling fan trouble (Toner cooling fan 3)
Causes: When the toner cooling fan is operated, the fan operation signal is not detected within the specified time. Toner cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: After turning ON the power, check to confirm that the fan is rotating. Replace the toner cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L4-58
Description: Ozone exhaust fan trouble
Causes: The fan operation signal is not detected within the specified time in the ozone exhaust fan operation. Ozone exhaust fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: Check that the fan is rotating after turning ON the power. Replace the ozone exhaust fan. Replace the PCU PWB. Check connection of the connector and the harness.

Code: L6-10
Description: Polygon motor trouble
Causes: The motor does not reach the specified rpm in 7 sec after starting rotation of the polygon motor. Polygon motor trouble. LSU control 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 polygon motor. Replace the LSU. Replace the LSU control PWB.