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MX-M264U TROUBLESHOOTING 7 – 15
L4-01
Main motor lock trouble
L4-11
Shift motor trouble
L4-30
MFP fan motor trouble
L4-31
Paper exit cooling fan trouble
L4-32
Power source cooling fan trouble
L4-35
Fusing cooling fan trouble
L4-43
Paper exit cooling fan 2 trouble
L4-44
Power cooling fan 2 trouble
L4-56
Fusing cooling fan 2 trouble
L6-10
Polygon motor trouble
Trouble content
The motor lock signal is detected during rotation of
the main motor.
Detail
PCU
Cause
Main motor lock trouble
Harness and connector connection trouble
PCU PWB trouble
Check & Remedy
Use SIM6-1 to check the operation of the main motor
lock.
Replace the main motor.
Check connection of the connectors and the harness.
Replace the PCU PWB.
Trouble content
No change in the shifter home position sensor signal
is detected in the operation of the shifter initializing.
Detail
PCU
Cause
Shift motor trouble.
PCU PWB trouble.
Connection trouble of the connector and the harness.
Shifter home position sensor trouble.
Check & Remedy
Use SIM6-1 to check the shift operation.
Use SIM30-1 to check the operation of the shifter
home position sensor.
Replace the shift motor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the shifter home position sensor.
Trouble content
The motor lock signal is detected during rotation of
the MFP fan motor.
Detail
MFP
Cause
Fan motor trouble.
Harness connection trouble between the MFPC PWB
and the fan motor.
MFP circuit trouble.
Check & Remedy
Use SIM6-2 to check the rotating operation of the fan.
Check the harness and the connector between the
MFPC PWB and the fan motor.
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
Paper exit cooling fan trouble.
PCU PWB trouble
Connection trouble of the connector and the harness.
Check & Remedy
Check connection of the connectors and the harness.
Use SIM6-2 to check the rotating operation of the fan.
Replace the paper exit cooling fan.
Replace the PCU PWB.
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
Power cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the harness.
Check & Remedy
Use SIM6-2 to check that the fan is actually rotating.
Replace the power cooling fan.
Replace the PCU PWB.
Check connection of the connectors and the harness.
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
Fusing cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the harness.
Check & 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.
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
Paper exit cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the harness.
Check & 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.
Trouble content
The lock signal is detected while the power cooling
fan is operating.
Detail
PCU
Cause
Power cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the harness.
Check & Remedy
Use SIM6-2 to check that the fan is actually rotating.
Replace the power cooling fan.
Replace the PCU PWB.
Check the connector and the harness.
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
Fusing cooling fan 2 trouble
PCU PWB trouble.
Connection trouble of the connector and the harness.
Check & Remedy
Use SIM6-2 to check that the fan is actually rotating.
Replace the fusing cooling fan.
Replace the PCU PWB.
Check the connector and the harness.
Trouble content
The polygon motor does not reach the specified RPM
within the specified time after starting rotation of the
polygon motor.
Detail
PCU
Cause
Polygon motor trouble.
LSU mother PWB trouble.
Connection trouble of the connector and the harness.
Check & 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 LSU mother PWB.