Code :

Code: L4-08
Description: Waste toner motor lock
Causes: The motor lock signal is detected during rotation of the waste toner motor.
Remedy: Case 1 Cause Harness connection trouble between the PCU PWB and the waste toner motor. Check and remedy Check the harness and the connector between the PCU PWB and the waste toner motor. Case 2 Cause Waste toner motor trouble, control circuit trouble Check and remedy Use SIM6-1 to check the operation of the waste toner motor.

Code: L4-09
Description: Resist motor lock
Causes: When the resist motor is rotation, the motor lock signal is detected.
Remedy: Case 1 Cause Harness connection trouble between the PCU PWB and the resist motor Check and remedy Check the harness and the connector between the PCU PWB and the resist motor. Case 2 Cause Resist motor trouble, control circuit trouble Check and remedy Use SIM6-1 to check the operation of the resist motor.

Code: L4-12
Description: Secondary transfer separation trouble
Causes: When the secondary transfer unit is separated, the separation sensor status change is not detected within the specified time.
Remedy: Case 1 Cause Connector and harness connection trouble Check and remedy Check connection of the connector and the harness. Case 2 Cause Separation mechanism trouble, separation motor trouble, separation sensor trouble Check and remedy Check the separation mechanism. Replace the separation motor and the separation sensor. Case 3 Cause PCU PWB trouble Check and remedy Replace the PCU PWB.

Code: L4-13
Description: Fusing external heating separation trouble
Causes: When the fusing external heating unit is separated, the separation sensor status change is not detected within the specified time.
Remedy: Case 1 Cause Connector and harness connection trouble Check and remedy Check connection of the connector and the harness. Case 2 Cause Separation mechanism trouble, separation motor trouble, separation sensor trouble Check and remedy Check the separation mechanism. Replace the separation motor and the separation sensor. Case 3 Cause PCU PWB trouble Check and remedy Replace the PCU PWB.

Code: L4-30
Description: Controller fan motor trouble
Causes: 1) The motor lock signal is detected during rotation of the controller fan motor. 2) The motor lock signal is detected during rotation of the HDD fan motor.
Remedy: Case 1 Cause Fan motor trouble Check and remedy Use SIM6-2 to check the operation of the fan motor. Case 2 Cause Harness connection trouble between the mother PWB and the fan motor. Check and remedy Check the harness and the connector between the mother PWB and the fan motor. Case 3 Cause Control circuit trouble Check and remedy Replace the MFPcnt PWB. Case 4 Cause Mother PWB trouble. Check and remedy Replace the mother PWB.

Code: L4-31
Description: Paper exit cooling fan F lock
Causes: When the paper exit cooling fan F is operated, the fan operation signal is not detected within the specified time.
Remedy: Case 1 Cause Fan connector disconnection Check and remedy Check the harness and the connector between the PCU PWB and the fan. Case 2 Cause Fan does not rotate because of other trouble. Check and remedy Use SIM6-2 to check that the fan is actually rotating.

Code: L4-32
Description: Power cooling fan 1 lock
Causes: When the power cooling fan 1 is operated, the fan operation signal is not detected within the specified time.
Remedy: Case 1 Cause Power cooling fan 1 connector disconnection Check and remedy Check the harness and the connector between the PCU PWB and the fan. Case 2 Cause Fan does not rotate because of other trouble Check and remedy Use SIM6-2 to check that the fan is actually rotating.

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.
Remedy: Case 1 Cause Fan connector disconnection Check and remedy Check the harness and the connector between the LSU PWB and the fan. Case 2 Cause Fan does not rotate because of other trouble Check and remedy Use SIM6-2 to check that the fan is actually rotating. If the trouble is not canceled, replace the LSU fan and the LSU cnt PWB.