Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 43
L4-48
ADU transport co oling fan motor F
trouble
L4-49
ADU transport cooling fan motor R
trouble
L4-57
Toner bottle cooling fan motor trouble
L4-60
Fusing pressure roller co oling fan
motor F trouble
L4-61
Fusing pressure roller cooling
fan
motor R trouble
L6-10
Polygon motor trouble
L8-01
Full wave signal detection error
L8-02
Full wave signal error
Trouble content
The lock signal is detected during rotation of the ADU
transport cooling fan motor F.
transport cooling fan motor F.
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)
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)
Check & Remedy
Use SIM6-2 to check the operation of the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Trouble content
The lock signal is detected during rotation of the ADU
transport cooling fan motor R.
transport cooling fan motor R.
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)
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)
Check & Remedy
Use SIM6-2 to check the operation of the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Trouble content
The fan operation signal is not detected within the
specified time in the toner bottle cooling fan
operation.
specified time in the toner bottle cooling fan
operation.
Detail
PCU
Cause
The fan does not rotate because of disconnection of
the fan connector or other trouble.
the fan connector or other trouble.
Check & Remedy
Check the harness and the connector between the
PCU PWB and the fan motor.
Check that the fan is rotating after turning ON the
power.
PCU PWB and the fan motor.
Check that the fan is rotating after turning ON the
power.
Trouble content
When the fan is operated, the fan operation signal is
not detected within the specified time.
not detected within the specified time.
Detail
PCU
Cause
Harness connection 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)
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)
Check & Remedy
Use SIM6-2 to check the operation of the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Trouble content
When the fan is operated, the fan operation signal is
not detected within the specified time.
not detected within the specified time.
Detail
PCU
Cause
Harness connection 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)
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)
Check & Remedy
Use SIM6-2 to check the operation of the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Check the harness and the connector between the
PCU PWB and the fan motor.
Replace the PCU PWB.
Replace the fan motor.
Trouble content
The polygon motor does not reach the specified RPM
within the specified time after starting rotation of the
polygon motor.
within the specified time after starting rotation of the
polygon motor.
Detail
PCU
Cause
Polygon motor trouble.
LSU control PWB trouble.
Connection trouble of the connector and the harness.
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 LSU.
Replace the LSU control PWB.
motor.
Check connection of the connector and the harness.
Replace the LSU.
Replace the LSU control PWB.
Trouble content
The full wave signal is not detected.
Detail
PCU
Cause
PCU PWB trouble.
Power unit trouble.
Connection trouble of the connector and the harness.
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.
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.
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.
Replace the power unit.
Check connection of the connector and the harness.
Check the power waveform.
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