Code :

Code: F2-45
Description: Color exclusive image density sensor trouble (Calibration plate surface reflection ratio abnormality)
Causes: Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, calibration plate dirt, calibration plate solenoid operation trouble
Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor and the harness operation for any trouble. If the adjustment is completed, check the calibration plate solenoid operation.

Code: F2-49
Description: LSU thermistor trouble
Causes: The detection temperature is out of the range of -28°C to 78°C.
Remedy: Case 1 Cause LSU thermistor harness connection trouble Check and remedy Check the connection of the LSU thermistor harness and connector. Case 2 Cause LSU thermistor trouble, PCU PWB trouble Check and remedy Replace the LSU thermistor. Replace the PCU PWB.

Code: F2-50
Description: K phase sensor sensing trouble
Causes: Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the BK drum phase. The detection signal cannot be acquired and phase control cannot be made.
Remedy: Case 1 Cause Sensor connector connection trouble Check and remedy Check the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedy Check for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedy If there is no trouble in the rib, replace the sensor. (Use SIM30-1 "DHPD_K" to check interruption or transmission of light.)

Code: F2-51
Description: CL phase sensor sensing trouble (C)
Causes: Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the color drum (C) phase. The detection signal cannot be acquired and phase control cannot be made.
Remedy: Case 1 Cause Sensor connector connection trouble Check and remedy Check the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedy Check for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedy If there is no trouble in the rib, replace the sensor. (Use SIM30-1 "DHPD_C" to check interruption or transmission of light.)

Code: F2-52
Description: CL phase sensor sensing trouble (M)
Causes: Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the color drum (M) phase. The detection signal cannot be acquired and phase control cannot be made.
Remedy: Case 1 Cause Sensor connector connection trouble Check and remedy Check the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedy Check for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedy If there is no trouble in the rib, replace the sensor. (Use SIM30-1 "DHPD_M" to check interruption or transmission of light.)

Code: F2-53
Description: CL phase sensor sensing trouble (Y)
Causes: Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the color drum (Y) phase. The detection signal cannot be acquired and phase control cannot be made.
Remedy: Case 1 Cause Sensor connector connection trouble Check and remedy Check the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedy Check for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedy If there is no trouble in the rib, replace the sensor. (Use SIM30-1 "DHPD_Y" to check interruption or transmission of light.)

Code: F2-58
Description: Process humidity sensor trouble
Causes: Process humidity sensor open
Remedy: Case 1 Cause Process humidity sensor harness connection trouble Check and remedy Check the harness and connector connection of the process humidity sensor. Case 2 Cause Process humidity sensor trouble Check and remedy Check the process humidity sensor. Case 3 Cause PCU PWB trouble Check and remedy Check the PCU PWB.

Code: F2-64
Description: Toner supply abnormality (K)
Causes: Toner end with the remaining quantity of 25% or more. The toner supply time exceeds 5 times as much as the specified time.
Remedy: Case 1 Cause Toner motor section connector harness trouble Check and remedy Check the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble. Piezoelectric sensor abnormality Check and remedy 1) Check the toner density sensor output. (SIM25-1) 2) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. Intermediate hopper replacement 3) If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit.