Sharp MX-M550N

MX-M700N SELF DIAG AND TROUBLE CODE 8 – 14
F2-32 Process control trouble
(Drum marking scan trouble)
F2-37 Drum marking sensor gain adjustment
error
F2-39 Process thermistor breakdown
F2-46 Developing thermistor breakdown
F2-47 Room temperature thermistor
breakdown
F2-48 Developing humidity sensor break
down
Details The drum marking size, density, or the number of
units is improper.
Section Engine
Case 1 Cause Drum marking sensor trouble
Check and
remedy
Use SIM 44-02 to perform the process control
sensor gain adjustment.
Case 2 Cause Improper connection of the harness between the
PCU PWB and the drum marking sensor
Check and
remedy
If "Error" is displayed, it may be considered as a
breakdown. Check the sensor and the harness.
Case 3 Cause The drum marking sensor is dirty.
OPC drum cleaning trouble
Check and
remedy
If the adjustment is completed, check the drum
surface conditions.
Details Before starting process control, the drum marking
area surface is read by the sensor to make the
sensor gain adjustment so that the output is fixed
to a certain level. Though the sensor gain is
changed, the output is not fixed to a certain level.
Section Engine
Case 1 Cause Drum marking sensor trouble
Check and
remedy
Use SIM 44-02 to perform the process control
sensor gain adjustment.
Case 2 Cause Improper connection of the harness between the
PCU PWB and the drum marking sensor
Check and
remedy
If "Error" is displayed, it may be considered as a
breakdown.
Check the sensor and the harness.
Case 3 Cause The drum marking sensor is dirty.
OPC drum cleaning trouble
Check and
remedy
If the adjustment is completed, check the drum
surface conditions.
Details When the input value of the process thermistor is
detected as 235 or greater or 22 or smaller for 3
times continuously.
Section Engine
Case 1 Cause Improper connection of the process thermistor
harness.
Check and
remedy
Check connection of the connector and the
harness of the process thermistor.
Case 2 Cause Process thermistor trouble
Check and
remedy
Check the process thermistor.
Case 3 Cause PCU PWB trouble
Check and
remedy
Check the PCU PWB.
Details When the input value of the process thermistor is
detected as 244 or greater or 20 or smaller for 3
times continuously
Section Engine
Case 1 Cause Developing thermistor harness connection trouble
Check and
remedy
Check connection of the connector and the
harness of the developing thermistor.
Case 2 Cause Developing thermistor harness trouble
Check and
remedy
Check the developing thermistor
Case 3 Cause PCU PWB trouble
Check and
remedy
Check the PCU PWB.
Details When the input value of the process thermistor is
detected as 235 or greater or 22 or smaller for 3
times continuously.
Section Engine
Case 1 Cause Improper connection of the room temperature
thermistor harness.
Check and
remedy
Check connection of the connector and the
harness of the process thermistor.
Case 2 Cause Room temperature thermistor trouble
Check and
remedy
Check the room temperature thermistor.
Case 3 Cause PCU PWB trouble
Check and
remedy
Check the PCU PWB.
Details When the output value of the development
humidity sensor is detected as 38 or smaller or
255 or greater.
The output value is the average value of 5
sampling data in the interval of 100ms.
Section Engine
Case 1 Cause Developing humidity sensor harness connection
trouble
Check and
remedy
Check connection of the connector and the
harness of the developing humidity sensor.
Case 2 Cause Developing humidity sensor trouble
Check and
remedy
Check the developing humidity sensor
Case 3 Cause PCU PWB trouble
Check and
remedy
Check the PCU PWB.