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MX-M700N SELF DIAG AND TROUBLE CODE 8 – 19
L4-02
Drum motor lock detection
L4-03
Fusing motor lock detection
L4-04
Developing motor lock detection
L4-06
Transfer belt separation motor trouble
detection
L4-30
Controller fan motor lock detection
L4-31
Paper discharging fan trouble
L6-10
Polygon motor lock detection
L8-01
No full wave signal
Details
The motor lock signal is detected for 1.5sec during
rotation of the drum motor.
When the motor lock signal is detected for 3 times
continuously in the interval of 500ms after 900ms
of rotation start.
Section
Engine
Case 1
Cause
Drum motor trouble
Check and
remedy
Use SIM 25-1 to check the drum motor operation.
Case 2
Cause
Improper connection of the harness between the
PCU PWB and the drum motor
Control circuit trouble
Check and
remedy
Check the harness and the connector of the PCU
PWB, and the drum motor.
Details
When it is detected for 3 times continuously in the
interval of 500ms after ignoring the fusing motor
drive start for 600ms.
Section
Engine
Case 1
Cause
Main motor trouble
Check and
remedy
Use SIM 25-1 to check the fusing motor operation.
Case 2
Cause
Improper connection of the harness between the
PCU PWB and the fusing motor
Control circuit trouble
Check and
remedy
Check connection of the harness and the
connector between the PCU PWB and the fusing
motor.
Details
The motor lock signal is detected for 1.5sec
during rotation of the developing motor.
When the motor lock signal is detected for 3 times
continuously in the interval of 500ms after 900ms
of rotation start.
Section
Engine
Case 1
Cause
Developing motor trouble
Check and
remedy
Use SIM 6-1 to check the developing motor
operation.
Case 2
Cause
Improper connection of the harness between the
PCU PWB and the developing motor.
Control circuit trouble.
Check and
remedy
Check the harness and the connector between
the PCU PWB and the developing motor.
Details
Transfer belt separation motor trouble detection
The transfer belt home position sensor ON/OFF is
not detected within the specified time (4 sec)
during operation of the transfer belt (separation,
contact).
Section
Engine
Case 1
Cause
Transfer belt separation motor trouble
Check and
remedy
Use SIM 6-1 to check the transfer belt motor
operation.
Case 2
Cause
Improper connection of the harness between the
PCU PWB and the transfer belt separation motor.
Control circuit trouble
Check and
remedy
Check connection of the harness and the
connection of the harness between the PCU PWB
and the transfer belt separation motor.
Details
The motor lock signal is detected during rotation of
the controller fan motor.
The motor lock signal is detected during rotation of
the HDD fan motor.
Section
Controller
Case 1
Cause
Fan motor trouble
Check and
remedy
Use SIM 6-2 to check the fan motor operation.
Case 2
Cause
Improper connection of the harness between the
controller PWB and the fan motor.
Control circuit trouble
Check and
remedy
Check the harness and the connector between the
controller PWB and the fan motor.
Details
When the detected value of the temperature
sensor (TH_EX) in the paper exit reverse unit is
greater than the specified level for 2 times
continuously in the interval of 30sec.
When 100°C (value of 235) of the paper exit
thermistor is detected for 3 times continuously.
(In the interval of 100ms)
Section
Engine
Case 1
Cause
Fan motor trouble
Check and
remedy
Use SIM 6-2 to check the fan motor operation.
Case 2
Cause
PCU PWB, harness connection between fan and
motor trouble
PCU circuit trouble
Thermistor (TH_EX) trouble
Check and
remedy
Check the PCU PWB, the harness between fan
and motor, and the connector.
Details
It is judged that the polygon motor lock signal of
the LSU is not outputted.
The polygon motor lock signal is checked in an
interval of 10sec after starting the polygon motor,
and it is found that the olygon motor is not rotating
normally.
Section
Engine
Case 1
Cause
Polygon motor trouble
Check and
remedy
Use SIM 61-1 to check the polygon motor
operation.
Case 2
Cause
Disconnection or breakage of the LSU connector
or the harness in the LSU
Check and
remedy
Check connection of the harness and the
connector.
Replace the LSU.
Details
The full wave signal is not detected.
When the FWS signal is not varied for 120ms when
supplying the power.
Section
Engine
Case 1
Cause
Disconnection or breakage of the PCU
PWB connector or the harness in the power unit
Check and
remedy
Check connection of the harness and the
connector.
Case 2
Cause
PCU PWB trouble
Check and
remedy
Replace the PCU PWB.
Case 3
Cause
12V power source trouble
Check and
remedy
Replace the power unit.
Replace the controller connection mother board.