Causes: Laser optical axis misalignment Reduced laser power, lighting error, laser diode trouble. Disconnection or improper connection of harness and connector between LD PWB and MCU PWB.
Remedy: Use SIM61-1 to check the operation of the LSU. Check connection of the connector and harness between the LD PWB and the MCU PWB. Replace the MCU PWB. Replace the LSU.
Code: EL-
Description: Auto developer adjustment trouble (Over-toner abnormality)
Causes: Toner density sensor trouble, charging voltage/ developing voltage error, toner concentration trouble, developing unit trouble, MCU PWB trouble.
Remedy: Use SIM25-2 to perform the auto developer adjustment.
Code: EU-
Description: Auto developer adjustment trouble (Under-toner abnormality)
Causes: Toner density sensor trouble, charging voltage/ developing voltage error, toner concentration trouble, developing unit trouble, MCU PWB trouble.
Remedy: Use SIM25-2 to perform the auto developer adjustment.
Code: F2-39
Description: Temperature sensor trouble
Causes: Process thermistor trouble. Process thermistor harness connection trouble. MCU PWB trouble.
Remedy: Replace the process thermistor. Check connection of the process thermistor harness and the connector. Replace the MCU PWB.
Code: F2-40
Description: ATC sensor trouble
Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. MCU PWB trouble.
Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the MCU PWB.
Code: F2-64
Description: Toner supply operation trouble
Causes: Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. MCU PWB trouble. Toner cartridge trouble. Developing unit trouble. Toner transport pipe section trouble
Remedy: Replace the toner motor. Replace the toner density sensor. Connector and harness check. Replace the MCU PWB. Replace the toner cartridge. Replace the developing unit. Check the toner transport pipe section.