夏普MX-4140N/5140N/4141N/5141N/4140NA/5141NA复印机维修手册
夏普MX-4140N/5140N/4141N/5141N/4140NA/5141NA彩色复印机英文维修手册F2-24 Discharge lamp trouble (M)
F2-25 Discharge lamp trouble (Y)
F2-39 Process thermistor trouble
F2-40 Toner density sensor trouble (K)
F2-41 Toner density sensor trouble (C)
F2-42 Toner density sensor trouble (M)
F2-43 Toner density sensor trouble (Y)
F2-45 Color image density sensor trouble
F2-49 LSU thermistor trouble
Detail PCU
Cause Contact trouble between the discharge lamp PWB
(M) and the PCU PWB.
Discharge lamp PWB (M) trouble.
PCU PWB trouble.
Check & Remedy Replace the discharge lamp PWB (M).
Check the harness and the connector.
Replace the PCU PWB.
Detail PCU
Cause Contact trouble between the discharge lamp PWB (Y)
and the PCU PWB.
Discharge lamp PWB (Y) trouble.
PCU PWB trouble.
Check & Remedy Replace the discharge lamp PWB (Y).
Check the harness and the connector.
Replace the PCU PWB.
Detail PCU
Cause Process thermistor trouble.
Process thermistor harness connection trouble.
PCU PWB trouble.
Check & Remedy Replace the process thermistor.
Check connection of the process thermistor harness
and the connector.
Replace the PCU PWB.
Detail PCU
Cause Toner density sensor output abnormality.
Sensor connector and harness connection trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Check connection of the sensor connector and the
harness.
Replace the developing unit.
Replace the PCU PWB.
Detail PCU
Cause Toner density sensor output abnormality.
Sensor connector and harness connection trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Check connection of the sensor connector and the
harness.
Replace the developing unit.
Replace the PCU PWB.
Detail PCU
Cause Toner density sensor output abnormality.
Sensor connector and harness connection trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Check connection of the sensor connector and the
harness.
Replace the developing unit.
Replace the PCU PWB.
Detail PCU
Cause Toner density sensor output abnormality.
Sensor connector and harness connection trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Check connection of the sensor connector and the
harness.
Replace the developing unit.
Replace the PCU PWB.
Detail PCU
Cause Color image density sensor sensitivity adjustment
trouble.
Color image density sensor trouble.
Sensor harness and connector connection trouble.
Image density sensor dirt.
Calibration plate dirt.
Transfer unit lift operation trouble
PCU PWB trouble.
Check & Remedy Replace the color image density sensor.
Check connection of the sensor harness and the
connector.
Clean the image density sensor.
Replace the calibration plate.
Repair the transfer unit lift mechanism.
Replace the PCU PWB.
Use SIM44-13 to perform the sensitivity adjustment of
the process control sensor.
Detail PCU
Cause The LSU temperature is outside of -28􀀀C - 78􀀀C.
LSU thermistor trouble.
LSU thermistor harness and connector connection
trouble
PCU PWB trouble.
LSU control PWB trouble.
Check & Remedy Replace the PCU PWB.
Replace the LSU control PWB.
Replace the LSU.
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