Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 42
L4-34
LSU cooling fan trouble
L4-35
Paper exit exhaust fan trouble
L4-36
Fusing cooling fan trouble
L4-39
Machine ventilation fan (R)
L4-40
Ozone fan motor 1 trouble
L4-41
Ozone fan motor 2 trouble
L4-42
Ozone fan motor 3 trouble
L4-43
Paper exit cooling fan R trouble
L4-44
Power source cooling fan 2 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 fan trouble.
Harness, connector trouble.
LSU control PWB trouble.
operation signal is not detected within the specified
time.
LSU fan trouble.
Harness, connector trouble.
LSU control PWB trouble.
Check & Remedy
Use SIM6-2 to check the fan operation.
Check the LSU fan, and replace if necessary.
Check the harness/connector, and replace if
necessary.
Check the LSU control PWB, and replace if
necessary.
Check the LSU fan, and replace if necessary.
Check the harness/connector, and replace if
necessary.
Check the LSU control PWB, and replace if
necessary.
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
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.
Use SIM6-2 to check that the fan is actually rotating.
PCU PWB and the fan.
Use SIM6-2 to check that the fan is actually rotating.
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
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.
Use SIM6-2 to check that the fan is actually rotating.
PCU PWB and the fan.
Use SIM6-2 to check that the fan is actually rotating.
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
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.
Use SIM6-2 to check that the fan is actually rotating.
PCU PWB and the fan.
Use SIM6-2 to check that the fan is actually rotating.
Trouble content
The lock signal is detected during rotation of the
ozone fan motor 1.
ozone fan motor 1.
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
ozone fan motor 2.
ozone fan motor 2.
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
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
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.
Use SIM6-2 to check that the fan is actually rotating.
PCU PWB and the fan.
Use SIM6-2 to check that the fan is actually rotating.
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
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.
Use SIM6-2 to check that the fan is actually rotating.
PCU PWB and the fan.
Use SIM6-2 to check that the fan is actually rotating.
Trouble content
The lock signal is detected during rotation of the
power source cooling fan 2.
power source cooling fan 2.
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.
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