Read Sharp MX-M850 (serv.man38) Service Manual online
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 24
L2-10
CCD cooling fan motor trouble
(SCU detection)
(SCU detection)
L2-11
Lamp cooling fan motor trouble
(SCU detection)
(SCU detection)
L3-00
Mirror return trouble
L4-01
Main motor lock trouble
L4-02
Drum motor lock trouble
L4-03
Fusing motor lock trouble
L4-04
Developing motor trouble
L4-08
Waste toner transport pipe lock
L4-14
Toner cartridge motor lock trouble
Detail
The lock signal is detected during rotation of the fan /
The non-lock state is detected when the motor is not
rotated in booting
The non-lock state is detected when the motor is not
rotated in booting
Section
SCU
Cause
Fan motor trouble, fan motor related harness and circuit
trouble.
trouble.
Check &
Remedy
Remedy
Check the fan motor related circuits (SCN-Mother PWB,
SCNCNT PWB) and their harness and connector.
SCNCNT PWB) and their harness and connector.
Detail
The lock signal is detected during rotation of the fan /
The non-lock state is detected when the motor is not
rotated in booting
The non-lock state is detected when the motor is not
rotated in booting
Section
SCU
Cause
Fan motor trouble, fan motor related harness and circuit
trouble.
trouble.
Check &
Remedy
Remedy
Check the fan motor related circuits (SCN-Mother PWB,
SCNCNT PWB) and their harness and connector.
SCNCNT PWB) and their harness and connector.
Detail
Mirror return is not completed within the specified time
Section
SCU
Cause
Mirror unit trouble. The mirror wire is disengaged.
Circuit trouble.
Circuit trouble.
Check &
Remedy
Remedy
Use Sim. 1-1 to check the operation of the mirror.
Check the mirror motor related circuits (SCN-Mother
PWB, SCNCNT PWB, MHP sensor PWB).
Check the mirror motor related circuits (SCN-Mother
PWB, SCNCNT PWB, MHP sensor PWB).
Detail
The motor lock signal is detected during rotation of the
main motor (MM/MM2)
main motor (MM/MM2)
Section
PCU
Cause
Main motor (MM/MM2) lock trouble.
Connection failure or disconnection of the connector
and the harness.
Control circuit trouble.
Connection failure or disconnection of the connector
and the harness.
Control circuit trouble.
Check &
Remedy
Remedy
Use Sim. 6-1 to check the operation of the main motor
(MM/MM2) lock.
Check the harness and the connector. (between the
PCU PWB and the motor, between the HL PWB and the
motor)
(MM/MM2) lock.
Check the harness and the connector. (between the
PCU PWB and the motor, between the HL PWB and the
motor)
Detail
When warming up, the paper feed motor is rotated
when canceling a jam, the lock signal is not detected
within 1sec.
when canceling a jam, the lock signal is not detected
within 1sec.
Section
PCU
Cause
Paper feed motor trouble.
Harness connection trouble between the PCU PWB and
the paper feed motor.
Control circuit trouble.
Harness connection trouble between the PCU PWB and
the paper feed motor.
Control circuit trouble.
Check &
Remedy
Remedy
Check the paper feed motor operation with Sim. 6-1.
Check connection of the connector and the harness
between the PCU PWB and the paper feed motor.
Check connection of the connector and the harness
between the PCU PWB and the paper feed motor.
Detail
The motor lock signal is detected during rotation of the
fusing motor
fusing motor
Section
PCU
Cause
Fusing motor trouble.
Harness connection trouble between the PCU PWB and
the developing motor.
Control circuit trouble.
Harness connection trouble between the PCU PWB and
the developing motor.
Control circuit trouble.
Check &
Remedy
Remedy
Check the fusing motor operation with Sim. 6-1.
Check connection of the harness and the connector
between the PCU PWB and the developing motor.
Check connection of the harness and the connector
between the PCU PWB and the developing motor.
Detail
The motor lock signal is detected during rotation of the
developing motor
developing motor
Section
PCU
Cause
Developing motor trouble.
Harness connection trouble between the PCU PWB and
the developing motor.
Control circuit trouble.
Harness connection trouble between the PCU PWB and
the developing motor.
Control circuit trouble.
Check &
Remedy
Remedy
Check the developing motor operation with Sim. 25-1.
Check connection of the connector and the harness
between the PCU PWB and the developing motor.
Check connection of the connector and the harness
between the PCU PWB and the developing motor.
Detail
Waste toner lock is detected during rotation of the drum
motor.
motor.
Section
PCU
Cause
Waste toner transport pipe lock. (clogging)
Waste toner lock sensor trouble.
Waste toner lock detection mechanism trouble.
Waste toner lock sensor trouble.
Waste toner lock detection mechanism trouble.
Check &
Remedy
Remedy
Use Sim. 6-1 to check the operations of the drum motor.
Check for clogging in the waste toner transport pipe.
Check the waste toner lock sensor.
Check for clogging in the waste toner transport pipe.
Check the waste toner lock sensor.
Detail
Though the toner cartridge motor is rotated for a certain
time, the toner cartridge motor rotation sensor count
value does not exceed the threshold value
time, the toner cartridge motor rotation sensor count
value does not exceed the threshold value
Section
PCU
Cause
Toner cartridge motor trouble.
Toner cartridge motor rotation sensor trouble.
Harness connection trouble between the PCU PWB and
the toner cartridge motor.
Harness trouble between the PCU PWB and the toner
cartridge motor rotation sensor.
Toner cartridge trouble.
Toner cartridge motor rotation sensor trouble.
Harness connection trouble between the PCU PWB and
the toner cartridge motor.
Harness trouble between the PCU PWB and the toner
cartridge motor rotation sensor.
Toner cartridge trouble.
Check &
Remedy
Remedy
Use Sim. 10-1 to check the operation of the toner
cartridge motor.
Use Sim. 10-3 to check the operation of the toner
cartridge motor rotation sensor.
Check the harness and the connector between the PCU
PWB and the toner cartridge motor.
Check the harness and the connector between the PCU
PWB and the toner cartridge motor rotation sensor.
Replace the toner cartridge.
cartridge motor.
Use Sim. 10-3 to check the operation of the toner
cartridge motor rotation sensor.
Check the harness and the connector between the PCU
PWB and the toner cartridge motor.
Check the harness and the connector between the PCU
PWB and the toner cartridge motor rotation sensor.
Replace the toner cartridge.
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