Description: Cannot detect the synchronized signal of the polygon motor for the laser unit (first time).
Remedy: 1 Connection failure of the laser unit flat cable. Reconnect the laser unit flat cable. 2 Laser unit flat cable failure. Replace the laser unit flat cable. 3 Laser unit failure. Replace the laser unit. 4 Main PCB failure. Replace the main PCB ASSY.
Code: 0501
Description: The center thermistor of the fuser unit has not reached the specified temperature within the specified time.
Remedy: <User Check> • Turn OFF the power switch. After several seconds, turn ON the power again and check that this error is reset. 1 Connection failure of the center or side thermistor harness of the fuser unit. Reconnect the center or side thermistor harness of the fuser unit. 2 Connection failure of the fuser unit heater harness. Reconnect the fuser unit heater harness. 3 Connection failure of the eject sensor harness. Reconnect the eject sensor harness. 4 Connection failure of the lowvoltage power supply harness. Reconnect the low-voltage power supply harness. 5 Eject sensor PCB failure. Replace the eject sensor PCB ASSY. 6 Fuser unit failure. Replace the fuser unit. 7 Low-voltage power supply PCB failure. Replace the low-voltage power supply PCB ASSY. 8 Main PCB failure. Replace the main PCB ASSY.
Code: 0502
Description: The center thermistor of the fuser unit has not reached the specified temperature within the specified time after it was heated normally to the certain level.
Remedy: <User Check> • Turn OFF the power switch. After several seconds, turn ON the power again and check that this error is reset. 1 Connection failure of the center or side thermistor harness of the fuser unit. Reconnect the center or side thermistor harness of the fuser unit. 2 Connection failure of the fuser unit heater harness. Reconnect the fuser unit heater harness. 3 Connection failure of the eject sensor harness. Reconnect the eject sensor harness. 4 Connection failure of the lowvoltage power supply harness. Reconnect the low-voltage power supply harness. 5 Eject sensor PCB failure. Replace the eject sensor PCB ASSY. 6 Fuser unit failure. Replace the fuser unit. 7 Low-voltage power supply PCB failure. Replace the low-voltage power supply PCB ASSY. 8 Main PCB failure. Replace the main PCB ASSY.
Code: 0503
Description: The center thermistor of the fuser unit detected a temperature higher than the specified value.
Remedy: <User Check> • Turn OFF the power switch. After several seconds, turn ON the power again and check that this error is reset. 1 Connection failure of the center or side thermistor harness of the fuser unit. Reconnect the center or side thermistor harness of the fuser unit. 2 Connection failure of the fuser unit heater harness. Reconnect the fuser unit heater harness. 3 Connection failure of the eject sensor harness. Reconnect the eject sensor harness. 4 Connection failure of the lowvoltage power supply harness. Reconnect the low-voltage power supply harness. 5 Eject sensor PCB failure. Replace the eject sensor PCB ASSY. 6 Fuser unit failure. Replace the fuser unit. 7 Low-voltage power supply PCB failure. Replace the low-voltage power supply PCB ASSY. 8 Main PCB failure. Replace the main PCB ASSY.
Code: 0504
Description: After the heat unit was heated normally, the center thermistor of the fuser unit detected a temperature lower than the specified value.
Remedy: <User Check> • Turn OFF the power switch. After several seconds, turn ON the power again and check that this error is reset. 1 Connection failure of the center or side thermistor harness of the fuser unit. Reconnect the center or side thermistor harness of the fuser unit. 2 Connection failure of the fuser unit heater harness. Reconnect the fuser unit heater harness. 3 Connection failure of the eject sensor harness. Reconnect the eject sensor harness. 4 Connection failure of the lowvoltage power supply harness. Reconnect the low-voltage power supply harness. 5 Eject sensor PCB failure. Replace the eject sensor PCB ASSY. 6 Fuser unit failure. Replace the fuser unit. 7 Low-voltage power supply PCB failure. Replace the low-voltage power supply PCB ASSY. 8 Main PCB failure. Replace the main PCB ASSY.
Code: 0505
Description: The center thermistor of the fuser unit detected a temperature rise greater than the specified value within the specified time.
Remedy: <User Check> • Turn OFF the power switch. After several seconds, turn ON the power again and check that this error is reset. 1 Connection failure of the center or side thermistor harness of the fuser unit. Reconnect the center or side thermistor harness of the fuser unit. 2 Connection failure of the fuser unit heater harness. Reconnect the fuser unit heater harness. 3 Connection failure of the eject sensor harness. Reconnect the eject sensor harness. 4 Connection failure of the lowvoltage power supply harness. Reconnect the low-voltage power supply harness. 5 Eject sensor PCB failure. Replace the eject sensor PCB ASSY. 6 Fuser unit failure. Replace the fuser unit. 7 Low-voltage power supply PCB failure. Replace the low-voltage power supply PCB ASSY. 8 Main PCB failure. Replace the main PCB ASSY.