Read Sharp MX-6201N / MX-7001N (serv.man20) Service Manual online
MX-7001N SELF DIAG AND TROUBLE CODE 8 – 27
L4-02
Paper feed motor lock trouble
L4-03
Fusing motor lock trouble
L4-04
Developing motor trouble (BK)
L4-05
Developing motor trouble (CL)
L4-06
Transfer belt separation position
sensor trouble
sensor trouble
L4-08
Waste toner motor lock
L4-09
Resist motor lock
L4-12
Secondary transfer separation trouble
Trouble content
When the paper feed motor is rotated in warming
up or in canceling a jam and the lock signal is not
detected within 1sec.
up or in canceling a jam and the lock signal is not
detected within 1sec.
Section
PCU
Case 1
Cause
Paper feed motor trouble, harness connection
trouble between PCU PWB and paper feed motor,
control circuit trouble
trouble between PCU PWB and paper feed motor,
control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the paper feed motor
operation. Check the harness and the connector
between the PCU PWB and the paper feed motor.
operation. Check the harness and the connector
between the PCU PWB and the paper feed motor.
Trouble content
The motor lock signal is detected during rotation of
the fusing motor.
the fusing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the fusing motor.
PWB and the fusing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fusing motor.
PCU PWB and the fusing motor.
Case 2
Cause
Fusing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the fusing
motor.
motor.
Trouble content
The motor lock signal is detected during rotation of
the developing motor.
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the developing motor.
PWB and the developing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM25-1 to check the operation of the
developing motor.
developing motor.
Trouble content
The motor lock signal is detected during rotation of
the developing motor.
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the developing motor.
PWB and the developing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM25-1 to check the operation of the
developing motor.
developing motor.
Trouble content
When separating the primary transfer belt unit,
change in the separation position sensor
characteristics is not detected within the specified
time.
change in the separation position sensor
characteristics is not detected within the specified
time.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the separation position sensor
PWB and the separation position sensor
Check and
remedy
remedy
Check the harness between the PCU PWB and the
separation position sensor.
separation position sensor.
Case 2
Cause
The belt position sensor is not interrupted or it is
always interrupted. Belt separation clutch
operation trouble
always interrupted. Belt separation clutch
operation trouble
Check and
remedy
remedy
Use SIM6-3 to check the belt separation operation.
Check to insure that the sensor is interrupted from
lighting when the belt is separated.
Check to insure that the sensor is interrupted from
lighting when the belt is separated.
Case 3
Cause
The primary transfer belt unit is not installed.
Check and
remedy
remedy
Install the primary transfer belt unit.
Trouble content
The motor lock signal is detected during rotation of
the waste toner motor.
the waste toner motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the waste toner motor.
PWB and the waste toner motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the waste toner motor.
PCU PWB and the waste toner motor.
Case 2
Cause
Waste toner motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the waste
toner motor.
toner motor.
Trouble content
When the resist motor is rotation, the motor lock
signal is detected.
signal is detected.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the resist motor
PWB and the resist motor
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the resist motor.
PCU PWB and the resist motor.
Case 2
Cause
Resist motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the resist
motor.
motor.
Trouble content
When the secondary transfer unit is separated, the
separation sensor status change is not detected
within the specified time.
separation sensor status change is not detected
within the specified time.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Separation mechanism trouble, separation motor
trouble, separation sensor trouble
trouble, separation sensor trouble
Check and
remedy
remedy
Check the separation mechanism. Replace the
separation motor and the separation sensor.
separation motor and the separation sensor.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
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