Description: Ventilation Fan Motor’s failure to turn
• The Lock signal remains HIGH for a continuous 12sec. or more period while the motor is energized (turning at high speed) when the Power Switch is turned ON. • The Lock signal remains HIGH for a continuous 3sec. or more period while the motor is energized (turning at high speed) during a copy cycle.
Remedy: 1 Ventilation Fan Motor operation: the voltage across PJ20A-1 on the Master Board and GND is DC24V during high-speed rotation and DC12V during low-speed rotation after the malfunction has been reset. NO Change Master Board. 2 The voltage across PJ20A-3 on the Master Board and GND is DC0V after the malfunction has been reset. YES Change Master Board. NO Change motor.
Code: C004E
Description: Power Supply Unit Cooling Fan Motor’s failure to turn
The Lock signal remains HIGH for a continuous 1-sec. or more period 5sec. after the motor is energized (turning at high speed).
Remedy: 1 Power Supply Unit Cooling Fan Motor operation: the voltage across PJ36A-11 on the Master Board and GND is DC15V during low-speed rotation and DC24V during high-speed rotation when the Start key is pressed. NO Change Master Board. 2 The voltage across PJ36A-9 on the Master Board and GND is DC0V (motor energized) when the Start key is pressed. YES Change Master Board. NO Change motor.
Code: C0070
Description: Toner Replenishing Motor’s failure to turn
• The Toner Bottle Home Position Sensor does not go from LOW to HIGH within 12 sec. after the motor has been energized. • The Toner Bottle Home Position Sensor does not go LOW within 12 sec. after the motor has been energized and the sensor has gone HIGH.
Remedy: 1 Toner Bottle turns when the Toner Bottle is turned a half turn and the Front Door is closed NO Correct drive coupling. 2 Toner Bottle Home Position Sensor operation: the voltage across PJ13A-9B on the Master Board and GND is DC0V (Toner Bottle at home position) and DC5V (Toner Bottle at a position other than home) when step 1 is performed. YES Change Master Board. NO Change sensor. 3 Toner Replenishing Motor operation: the voltage across PJ13A-9A on the Master Board and GND is DC0V (Toner Bottle at a stop) and DC24V (Toner Bottle turning) when step 1 is performed. YES Change motor. NO Change Master Board.
Code: C0071
Description: Toner Replenishing Motor turning at abnormal timing
The Toner Bottle Home Position Sensor is HIGH after the lapse of 2 sec. after the motor has been deenergized.
Remedy: 1 Toner Bottle turns abnormally after the malfunction has been reset YES Change Master Board.
Code: C0420
Description: Exposure Lamp turning ON at abnormal timing
The average value of one line exceeds a predetermined level during clamp adjustment
Remedy: 1 Exposure Lamp turns ON at abnormal timing. NO Change CCD Assy and Master Board. 2 Inverter Board operation: the voltage across PJ11A-10 on the Master Board and GND is 24V after the malfunction has been reset. YES Change Inverter Board. NO Change Master Board.
Code: C0500
Description: Warming-up failure
The surface temperature of the Upper Fusing Roller does not reach a given level even after the lapse of a given period of time during warming-up as detailed below: • From room temperature to 50°C: Within 20 sec. • From 50°C to 90°C: Within 20 sec. • From 90°C to 150°C: Within 20 sec. The copier fails to complete its warm-up cycle within 15 sec. after the temperature has reached 150°C.
Remedy: 1 Heater Lamp turns ON when the Power Switch is turned ON YES Correct Thermistor for mounting position and/or clean. NO Make checks from step 3 onward. 2 Thermistor operation: resistance across CN14- 2 and 3 on Fusing Unit side is infinite, as measured with CN14 (4P) disconnected. YES Change Thermistor. NO Change Master Board. 3 Fusing Thermoswitch and Heater Lamp operation: have continuity across CN5-1 and 2 on the Fusing Unit side with CN5 (2P) disconnected YES Change DC Power Supply 2. NO Change Fusing Thermoswitch and Heater Lamp. 4 The voltage across PJ7A-1 on the Master Board and GND is DC0V (Heater Lamp ON) and DC24V (Heater Lamp OFF) when the Power Switch is turned ON. YES Change Master Board. 5 The voltage across PJ4PU2-4 on DC Power Supply 2 and GND is DC0V (Heater Lamp ON) and DC24V (Heater Lamp OFF) when the Power Switch is turned ON. YES Change DC Power Supply 2. NO Plug in CN27 and CN14.