Sharp MX-4100N Service Manual page 308

L4-06 Transfer unit lift trouble
Trouble content When separating the primary transfer belt unit,
change in the separation position sensor
characteristics is not detected within the specified
time.
Detail PCU
Cause Transfer unit position sensor trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Transfer unit separation clutch operation trouble.
Primary transfer belt unit is not installed.
Check & Remedy Use SIM6-3 to check the separating operation of the
transfer unit.
Install the primary transfer belt unit.
Replace the transfer unit position sensor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the transfer unit separation clutch.
L4-11 Shift motor trouble
Trouble content
Detail PCU
Cause No change in the shifter home position sensor signal
is detected in the operation of the shifter initializing.
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.
L4-16 Fusing pressure release trouble
Trouble content
Detail PCU
Cause No change in the fusing pressure release sensor
signal is detected within the specified time after
turning ON the fusing pressure release motor.
Fusing pressure release sensor trouble.
Fusing pressure release motor trouble.
Fusing pressure release level F, R trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Check & Remedy Replace the fusing pressure release sensor.
Replace the fusing pressure release motor.
Replace the fusing pressure release lever F, R.
Replace the PCU PWB.
Check connection of the connector and the harness.
L4-30 MFP fan motor trouble
Trouble content
Detail MFP
Cause Fan motor trouble.
MFP PWB trouble.Harness and connector
connection trouble.
PCU PWB trouble
Check & Remedy Use SIM6-2 to check the operation of the fan motor.
Replace the fan motor.
Replace the MFP PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.
MX-5001N SELF DIAG AND TROUBLE CODE 7 – 22
L4-31 Paper exit cooling fan trouble
Trouble content
Detail PCU
Cause The fan operation signal is not detected within the
specified time in the paper exit cooling fan operation.
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.
L4-32 Power source cooling fan trouble
Trouble content
Detail PCU
Cause The fan operation signal is not detected within the
specified time in the power cooling fan operation.
Power cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Check & Remedy Use SIM6-2 to check the rotating operation of the
fan.
Replace the power cooling fan.
Replace the PCU PWB.
Check/replace the connector or the harness.
L4-34 LSU cooling fan trouble
Trouble content
Detail PCU
Cause 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.
Check & 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.
L4-35 Fusing cooling fan trouble
Trouble content
Detail PCU
Cause 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.
Check & 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.