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.
Code: C0904
Description: 3rd Drawer Lift-Up Motor malfunction
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.
Remedy: 1 4th Drawer Lift-Up Motor turns when the 4th Drawer is slid out and then back in NO Correct drive coupling. 2 4th Drawer Lift-Up Motor operation: the voltage across PJ10A-1 on the Master Board and GND is DC0V (motor deenergized) and DC24V (motor energized) after the 4th Drawer has been slid in position. YES Change motor. NO Change Master Board. 3 4th Drawer Lift-Up Motor Pulse Sensor operation: the voltage across PJ9A-9 on the Master Board and GND varies in the range between DC0V and DC5V while the 4th Drawer Lift-Up Motor is energized. YES Change Master Board. NO Change pulse disk and gear. Change sensor. 4 4th Drawer Lift-Up Sensor operation: the voltage across PJ9A-2 on the Master Board and GND is DC5V (sensor unblocked) and DC0V (sensor blocked). YES Change Master Board. NO Correct retraction mechanism. Change sensor.