MX-4100N, MX-4101N, MX-5000N, MX-5001N (serv.man15). Service Manual-Section 7-Self Diag and Trouble Code - Sharp Copying Equipment Service Manual (repair manual). Page 21

MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 21

 

 

 

 

 

 

 

 

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.

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.

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.

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.

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.

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.

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.

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.