Description: Abnormal image transfer voltage
The image transfer voltage remains more than 100 V for a continuous 0.1-sec. period or more while the PC Drum remains stationary (except while an F2 operation is being run).
Remedy: 1 The voltage across CN11-1 on the side of Power Supply Unit and GND is DC24 V. The voltage across CN11-2 on the side of Power Supply Unit and GND is DC5 V. NO Change Power Supply Unit. 2 The voltage across CN17-12 on the side of Master Board and GND remains DC1.2 V or less while the malfunction code is being displayed. YES Change Master Board. 3 The voltage across CN17-15 on the side of Master Board and GND remains DC0.9 V or more while the malfunction code is being displayed. YES Change Master Board. NO Change High Voltage Unit.
Code: C0500
Description: Warming-up failure
The temperature of the Fusing Rollers does not reach the required level even after the lapse of a given period of time during a warm-up cycle. • From room temperature to 100 °C: Within 65 sec. • From 100 °C to 140 °C: Within 30 sec. • From 140 °C to 170 °C: Within 20 sec. • From 170 °C to the completion of warming-up: Within 22 sec.
Remedy: 1 Fusing Roller Heater Lamp turns ON when the Side Cover is opened and closed. NO Check step 3 and onward. 2 The resistance of Fusing Roller Thermistor (across CN25-2 and 3 on the Fusing Unit end) is infinity. YES Change Fusing Roller Thermistor. NO Change Master Board. 3 There is continuity across CN3-1 and 2 on the Fusing Unit end. YES Check step 7. 4 Fusing Roller Heater Lamp is conducting. NO Change Fusing Roller Heater Lamp. 5 Fusing Roller Thermostat is conducting. NO Change Fusing Roller Thermostat. 6 Fusing Roller Heater Lamp Fuse is conducting. NO Change Fusing Roller Heater Lamp Fuse. 7 There is continuity across 1A and 1B, and across 2A and 2B, when Side Cover Interlock Switch 2 is actuated. YES Change Power Supply Unit. Change Master Board. NO Change Side Cover Interlock Switch 2.
Code: C0510
Description: Abnormally low fusing temperature
• The fusing temperature remains 105 °C or less for a continuous 0.1-sec. period or more during the standby state or printing. • The fusing temperature remains a level lower than the following temperature for a continuous 2-min. period or more during the low-temperature standby state. 35-cpm copier: 105 °C 25-cpm copier: 80 °C 20-cpm copier (U.S.A. and Canada only): 80 °C
Remedy: 1 Fusing Roller Heater Lamp turns ON when the Side Cover is opened and closed. NO Check step 3 and onward. 2 The resistance of Fusing Roller Thermistor (across CN25-2 and 3 on the Fusing Unit end) is infinity. YES Change Fusing Roller Thermistor. NO Change Master Board. 3 There is continuity across CN3-1 and 2 on the Fusing Unit end. YES Check step 7. 4 Fusing Roller Heater Lamp is conducting. NO Change Fusing Roller Heater Lamp. 5 Fusing Roller Thermostat is conducting. NO Change Fusing Roller Thermostat. 6 Fusing Roller Heater Lamp Fuse is conducting. NO Change Fusing Roller Heater Lamp Fuse. 7 There is continuity across 1A and 1B, and across 2A and 2B, when Side Cover Interlock Switch 2 is actuated. YES Change Power Supply Unit. Change Master Board. NO Change Side Cover Interlock Switch 2.
Code: C0520
Description: Abnormally high fusing temperature
The fusing temperature remains 230 °C or more for a continuous 0.1-sec. period or more.
Remedy: 1 Fusing Roller Thermistor is dirty. YES Clean. 2 The circuit across CN25-2 and -3 on the Fusing Unit end is shorted. YES Change Fusing Roller Thermistor. NO Change Master Board.
Code: C0650
Description: Faulty Scanner Home Position Sensor 1
<The Power Switch is turned ON, Original Cover lowered, or Start key pressed when the Scanner is at its home position> • The Scanner Home Position Sensor 1 is not unblocked (H) even when the Scanner moves 10 mm to the left. • The Scanner Home Position Sensor 1 is not blocked (L) even when the Scanner moves 4 mm to the right after the Scanner Home Position Sensor 1 has been unblocked (H). <The Power Switch is turned ON, Original Cover lowered, or Start key pressed when the Scanner is at any position other than home> • The Scanner Home Position Sensor 1 is not blocked (L) even when the Scanner moves 469.5 mm to the right.
Remedy: 1 Scanner Motor operation check: Select functions in the following order: Tech. Rep. Mode - Movement Check - Scanner; set +1000 in Relative Position?h and touch Set?h; the Scanner moves at this time. YES Check step 3 and onward. 2 The Scanner can be moved manually. YES Change Scanner Motor. Change BCR Board. Change MFB2 Board. Change Master Board. NO Correct drive coupling. 3 C0651 is displayed. YES Check step 7 and onward. 4 Scanner Home Position Sensor 1 operation check through I/O check YES Check to see if Scanner Home Position Sensor 1 is blocked as the Scanner is moved. If it is checked okay, change Master Board. 5 Scanner Home Position Sensor 1 operation check: the voltage across CN11BCR-1 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. NO Change Scanner Home Position Sensor 1. 6 Scanner Home Position Sensor 1 operation check: the voltage across CN1BCR-26 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. YES Change BCR Board. NO Change MFB2 Board. Change Master Board. 7 Scanner Home Position Sensor 2 operation check through I/O check YES Check to see if Scanner Home Position Sensor 2 is blocked as the Scanner is moved. If it is checked okay, change Master Board. 8 Scanner Home Position Sensor 2 operation check: the voltage across CN12BCR-1 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. NO Change Scanner Home Position Sensor 2. 9 Scanner Home Position Sensor 2 operation check: the voltage across CN1BCR-27 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. YES Change BCR Board. NO Change MFB2 Board. Change Master Board.
Code: C0651
Description: Faulty Scanner Home Position Sensor 2
When the Start key is pressed with a document loaded in the Document Feed Tray of the ADF, Scanner Home Position Sensor 2 is not blocked (L) even when the Scanner moves 463 mm to the left after the sensor has been unblocked (H).
Remedy: 1 Scanner Motor operation check: Select functions in the following order: Tech. Rep. Mode - Movement Check - Scanner; set +1000 in Relative Position?h and touch Set?h; the Scanner moves at this time. YES Check step 3 and onward. 2 The Scanner can be moved manually. YES Change Scanner Motor. Change BCR Board. Change MFB2 Board. Change Master Board. NO Correct drive coupling. 3 C0651 is displayed. YES Check step 7 and onward. 4 Scanner Home Position Sensor 1 operation check through I/O check YES Check to see if Scanner Home Position Sensor 1 is blocked as the Scanner is moved. If it is checked okay, change Master Board. 5 Scanner Home Position Sensor 1 operation check: the voltage across CN11BCR-1 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. NO Change Scanner Home Position Sensor 1. 6 Scanner Home Position Sensor 1 operation check: the voltage across CN1BCR-26 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. YES Change BCR Board. NO Change MFB2 Board. Change Master Board. 7 Scanner Home Position Sensor 2 operation check through I/O check YES Check to see if Scanner Home Position Sensor 2 is blocked as the Scanner is moved. If it is checked okay, change Master Board. 8 Scanner Home Position Sensor 2 operation check: the voltage across CN12BCR-1 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. NO Change Scanner Home Position Sensor 2. 9 Scanner Home Position Sensor 2 operation check: the voltage across CN1BCR-27 on BCR Board and GND is DC0 V when the sensor is blocked and DC5 V when the sensor is unblocked. YES Change BCR Board. NO Change MFB2 Board. Change Master Board.