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L4-01
Main motor lock 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.
L4-11
Shift motor trouble
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.
L4-34
LSU cooling fan trouble
Trouble content
The fan operation signal is not detected.
Detail
PCU
Cause
LSU 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 LSU cooling fan.
Replace the PCU PWB.
L4-32
Power source cooling fan trouble
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.
L4-35
Fusing cooling fan trouble
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.
L4-40
Trouble content
Check & Remedy
L4-43
Trouble content
Check & Remedy
L6-10
Trouble content
Check & Remedy
L4-70
Trouble content
Check & Remedy
L8-02
Trouble content
Check & Remedy
MX-M316N TROUBLESHOOTING 7 – 15
Ozone fan trouble
The fan operation signal is not detected.
Detail
PCU
Cause
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)
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.
Paper exit cooling fan trouble
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.
Replace the fan.
Replace the PCU PWB.
Check the connector and the harness.
Use SIM6-2 to check that the fan is actually rotating.
Polygon motor trouble
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.
PCU PWB trouble.
Connection trouble of the connector and the harness.
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.
Toner motor lock trouble
Detail
PCU
Cause
Toner motor abnormality
Improper connection or disconnection of the toner
motor and the harness.
PCU PWB abnormality
Use SIM 10-1 to check the toner motor operations.
Check connection of the toner motor harness/
connector.
Replace the toner motor.
PCU PWB.
Full wave signal width abnormality
The full wave signal frequency is judged as abnormal.
(The detected frequency is over 65Hz or below
45Hz.)
Detail
PCU
Cause
PCU PWB trouble.
Power unit trouble.
Harness trouble.
Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Replace the
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