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.
Code: C0510
Description: Abnormally low fusing temperature
The surface temperature of the Upper Fusing Roller remains less than 135°C for a continuous 1-sec. or more period after the copier has completed warming up.
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.
Code: C0520
Description: Abnormally high fusing temperature
The surface temperature of the Upper Fusing Roller remains 230°C or more for a continuous 1-sec. or more period after the copier has completed warming up.
Remedy: 1 The Heater Lamp remains lit after the copier has warmed up. YES Make checks from step 2 onward. NO Make checks from step 3 onward. 2 The voltage across PJ7A-1 and GND remains DC0V after the copier has warmed up. YES Change Master Board. NO Change DC Power Supply 2. 3 The circuit across CN14-2 and 3 on the Fusing Unit side is shorted with CN14 (4P) disconnected. YES Change Thermistor. NO Change Master Board.
Code: C0600
Description: Scanner Motor malfunction
• When the Scanner is at a position other than home, the Scanner Home Sensor does not go from HIGH to LOW even after the lapse of 20 sec. after the Power Switch has been turned ON. • When the Scanner is at the home position, the Scanner Home Sensor does not go from LOW to HIGH even after the lapse of 10 sec. after the Scanner has started its scan motion. • The Scanner Home Sensor does not go from HIGH to LOW even after the lapse of 40 sec. after the Scanner has started its scan motion.
Remedy: 1 Have Scanner motion when it is moved manually. NO Correct drive coupling. Rewind cables. 2 Connectors on the SCP Board properly connected NO Connect. 3 The voltage across PJ11A-12 on the Master Board and GND is DC5V after the malfunction has been reset. NO Change Master Board. 4 The voltage across PJ2F-1 on the SCP Board and GND is DC24V YES Change Scanner Motor and SCP Board. 5 Scanner Home Sensor operation: the voltage across PJ5A-6A on the Master Board and GND is DC0V (sensor blocked) and DC5V (sensor unblocked). YES Change Master Board. NO Change sensor.
Remedy: 1 3rd Drawer Lift-Up Motor turns when the 3rd Drawer is slid out and then back in NO Correct drive coupling. 2 3rd Drawer Lift-Up Motor operation: the voltage across PJ10A-3 on the Master Board and GND is DC0V (motor deenergized) and DC24V (motor energized) after the 3rd Drawer has been slid in position. YES Change motor. NO Change Master Board. 3 3rd Drawer Lift-Up Motor Pulse Sensor operation: the voltage across PJ8A-5B on the Master Board and GND varies in the range between DC0V and DC5V while the 3rd Drawer Lift-Up is energized. YES Change Master Board. NO Change pulse disk and gear. Change sensor. 4 3rd Drawer Lift-Up Sensor operation: the voltage across PJ8A-12B on the Master Board and GND is DC5V (sensor unblocked) and DC0V (sensor blocked). YES Change Master Board. NO Correct retraction mechanism. Change sensor.