Code :

Code: F2-39
Description: Process thermistor trouble
Causes: Process thermistor trouble. Process thermistor harness connection trouble. PCU PWB trouble.
Remedy: Replace the process thermistor. Check connection of the process thermistor harness and the connector. Replace the PCU PWB.

Code: F2-40
Description: Toner density sensor trouble (K)
Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. PCU PWB trouble.
Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the PCU PWB.

Code: F2-41
Description: Toner density sensor trouble (C)
Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. PCU PWB trouble.
Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the PCU PWB.

Code: F2-42
Description: Toner density sensor trouble (M)
Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. PCU PWB trouble.
Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the PCU PWB.

Code: F2-43
Description: Toner density sensor trouble (Y)
Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. PCU PWB trouble.
Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the PCU PWB.

Code: F2-45
Description: Color image density sensor trouble
Causes: 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.
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.

Code: F2-49
Description: LSU thermistor trouble
Causes: The LSU temperature is outside of -28C - 78C. LSU thermistor trouble. LSU thermistor harness and connector connection trouble PCU PWB trouble. LSU control PWB trouble.
Remedy: Replace the PCU PWB. Replace the LSU control PWB. Replace the LSU.

Code: F2-50
Description: K drum phase sensor trouble
Causes: Drum phase sensor trouble. Drum phase sensor harness and connector connection trouble Drum drive section trouble. PCU PWB trouble.
Remedy: Use SIM30-1 to check the operation of "DHPD_K". Replace the drum phase sensor. Check connection of the drum phase sensor harness and the connector. Repair the drum drive section. Replace the PCU PWB.