MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 23
L4-04 Developing motor trouble (BLACK)
L4-05 Developing motor trouble (COLOR)
L4-06 Transfer belt separation position sen-
sor trouble
L4-11 Shift motor trouble
L4-30 Controller fan/HDD fan motor trouble
L4-31 Paper exit cooling fan trouble
Trouble content The motor lock signal is detected during rotation of the
developing motor.
Section PCU
Case 1 Cause Harness connection trouble between the PCU PWB
and the developing motor.
Check
and
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
Case 2 Cause Developing motor trouble, control circuit trouble
Check
and
remedy
Use SIM25-1 to check the operation of the developing
motor.
Trouble content The motor lock signal is detected during rotation of the
developing motor.
Section PCU
Case 1 Cause Harness connection trouble between the PCU PWB
and the developing motor.
Check
and
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
Case 2 Cause Developing motor trouble, control circuit trouble
Check
and
remedy
Use SIM25-1 to check the operation of the 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.
Section PCU
Case 1 Cause Harness connection trouble between the PCU PWB
and the separation position sensor
Check
and
remedy
Check the harness between the PCU PWB and the
separation position sensor.
Case 2 Cause The belt position sensor is not interrupted or it is
always interrupted. Belt separation clutch operation
trouble
Check
and
remedy
Use SIM6-3 to check the belt separation operation.
Case 3 Cause The primary transfer belt unit is not installed.
Check
and
remedy
Install the primary transfer belt.
Trouble content When the shift motor is initialized, no characteristics
change of the shifter home position sensor is not
detected within the specified time.
Section PCU
Case 1 Cause Shift motor trouble
Check
and
remedy
Use SIM6-1 to check the operation of the shift motor.
Case 2 Cause Harness connection trouble between the PCU PWB
and the shift motor, control circuit trouble
Check
and
remedy
Use SIM30-1 to check the shifter home position
sensor. Check the harness and the connector
between the PCU PWB and the shift motor.
Case 3 Cause When the finisher is installed with the finisher
connector disconnected and when the finisher
communication trouble occurs.
Check
and
remedy
Connect the finisher connector.
When the communication trouble occurs between the
PCU and the finisher, refer to the content of F1-00.
Trouble content 1) The motor lock signal is detected during rotation
of the controller fan motor.
2) The motor lock signal is detected during rotation
of the HDD fan motor.
Section MFP
Case 1 Cause Fan motor trouble
Check
and
remedy
Use SIM6-2 to check the operation of the fan motor.
Case 2 Cause Harness connection trouble between the mother PWB
and the fan motor.
Check
and
remedy
Check the harness and the connector between the
mother PWB and the fan motor.
Case 3 Cause Control circuit trouble
Check
and
remedy
Replace the controller PWB.
Case 4 Cause Mother PWB trouble.
Check
and
remedy
Replace the mother PWB.
Trouble content When the paper exit cooling fan is operated, the fan
operation signal is not detected within the specified
time.
Section PCU
Case 1 Cause Fan connector disconnection
Check
and
remedy
Check the harness and the connector between the
PCU PWB and the fan.
Case 2 Cause Fan does not rotate because of other trouble.
Check
and
remedy
Use SIM6-2 to check that the fan is rotation actually.
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