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 22

MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 22

 

 

 

 

 

 

 

 

Trouble content

Detail

PCU

Cause

When the toner cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Toner cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

After turning ON the power, check to confirm that the 
fan is rotating.
Replace the toner cooling fan.
Replace the PCU 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 process fan operation.
Process fan trouble.
PCU PWB trouble
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the process fan.
Replace the PCU 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 rear cooling fan operation.
Rear cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the rear cooling fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

When the toner cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Toner cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

After turning ON the power, check to confirm that the 
fan is rotating.
Replace the toner cooling fan.
Replace the PCU 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 ozone exhaust fan operation.
Ozone exhaust fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the ozone exhaust fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The motor does not reach the specified rpm in 7 sec 
after starting rotation of the polygon motor.
Polygon motor trouble.
LSU control 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 polygon motor.
Replace the LSU.
Replace the LSU control PWB.

Trouble content

Detail

PCU

Cause

No full wave signal is detected.
PCU PWB trouble
Power unit trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

An abnormality in the full wave signal frequency is 
detected.
(The frequency is detected as 65Hz or above, or 
45Hz or less.)PCU PWB trouble.
Power unit trouble.
Connection trouble of the connector and the 
harness.
Power frequency, waveform abnormality.

Check & Remedy

Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Check the power waveform.