• Code: 903, 904
• Display: Power off/on 903: Error, 904: Error
• Description: The belt thermistor detected abnormal (too high or too low) temperature.
• Remedy: Is the belt thermistor cable connected properly? Does this error recur?
  Re-connect the cable properly and restore the power. Replace the belt thermistor, after a lapse of 30 minutes, turn on the power.

• Code: 918
• Display: Power off/on 918: Error
• Description: Duplex FAN error
• Remedy: Does this error recur after power restoration? Does this error recur after power restoration? Does this error recur after power restoration?
  Check if the duplex unit is installed properly. Check if the FAN is connected properly. Replace the FAN.

• Code: 923
• Display: Power off/on 923: Error
• Description: The ID motor is not running normally.
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Check if the image drum is installed properly. Replace the image drum unit. Replace the ID motor.

• Code: 928
• Display: Power off/on 928: Error
• Description: The fuser motor is not running normally.
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Check if the fuser is installed properly. Replace the fuser. Replace the fuser motor.

• Code: 931
• Display: Power off/on 931: Error
• Description: Duplex unit CPU clock frequency error
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Replace the unit. Replace the CU/ PU board.

• Code: 933
• Display: Power off/on 933: Error
• Description: Tray 2 CPU clock frequency error
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Replace the unit. Replace the CU/ PU board.

• Code: 934
• Display: Power off/on 934: Error
• Description: Tray 3 CPU clock frequency error
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Replace the unit. Replace the CU/ PU board.

• Code: 935
• Display: Power off/on 935: Error
• Description: Tray 4 CPU clock frequency error
• Remedy: Does this error message reappear after power restoration? Does this error message reappear after power restoration?
  Replace the unit. Replace the CU/ PU board.