• Code: 0300
• Display: POLYGON MOT
• Description: Polygon motor malfunction
  • The polygon motor does not rotate evenly even after the lapse of a given period of time after it has been started. • The motor lock signal remains HIGH for a given period of consecutive time while the polygon motor is being rotated.
• Remedy: 1 Check the connector between PH unit- PRCB PJ18 for proper connection and correct as necessary. 2 Change PH unit. 3 Change PRCB.

• Code: 0310
• Display: LASER ERROR
• Description: Laser malfunction
  • The SOS signal is not detected within a given period of time after the output of the laser has been started.
• Remedy: 1 Check the connector between PH unit- PRCB PJ18 for proper connection and correct as necessary. 2 Check the connector between PH unit- MFPB CN15 for proper connection and correct as necessary. 3 Change PH unit. 4 Change PRCB.

• Code: 0500
• Display: FUSER ERROR
• Description: Heating roller warm-up failure
  • The thermistor /1 does not detect the specified temperature and the warm-up cycle is not completed even after the lapse of a given period of time after the cycle has been started.
• Remedy: 1 Check the fuser unit for correct installation (whether it is secured in position). 2 Check the connector between fuser unit- PRCB PJ9 for proper connection and correct as necessary. 3 Check the connector between fuser unit- DCPU CN2 for proper connection and correct as necessary. 4 Change fuser unit. 5 Change PRCB. 6 Change DCPU.

• Code: 0502
• Display: TERMISTOR1
• Description: Thermistor open-circuit failure
  • The temperature detected by the thermistor/1 does not reach a predetermined level even after the lapse of a given period time after the warm-up cycle has been started.
• Remedy: 1 Check the fuser unit for correct installation (whether it is secured in position). 2 Check the connector between fuser unit- PRCB PJ9 for proper connection and correct as necessary. 3 Check the connector between fuser unit- DCPU CN2 for proper connection and correct as necessary. 4 Change fuser unit. 5 Change PRCB. 6 Change DCPU.

• Code: 0503
• Display: TERMISTOR2
• Description: Thermistor resistance failure
  • The difference between the temperature detected by thermistor/1 and that detected by thermistor/2 exceeds a predetermined value.
• Remedy: 1 Check the fuser unit for correct installation (whether it is secured in position). 2 Check the connector between fuser unit- PRCB PJ9 for proper connection and correct as necessary. 3 Check the connector between fuser unit- DCPU CN2 for proper connection and correct as necessary. 4 Change fuser unit. 5 Change PRCB. 6 Change DCPU.

• Code: 0510
• Display: FUSER ERROR
• Description: Abnormally low heating roller temperature
  • The temperature detected by the thermistor /1 remains lower than the specified value for a given period of time or longer.
• Remedy: 1 Check the fuser unit for correct installation (whether it is secured in position). 2 Check the connector between fuser unit- PRCB PJ9 for proper connection and correct as necessary. 3 Check the connector between fuser unit- DCPU CN2 for proper connection and correct as necessary. 4 Change fuser unit. 5 Change PRCB. 6 Change DCPU.

• Code: 0520
• Display: FUSER ERROR
• Description: Abnormally high heating roller temperature
  • The temperature detected by the thermistor /1 remains higher than the specified value for a given period of time or longer. • The heater lamp remains ON for a given period of time or longer.
• Remedy: 1 Check the fuser unit for correct installation (whether it is secured in position). 2 Check the connector between fuser unit- PRCB PJ9 for proper connection and correct as necessary. 3 Check the connector between fuser unit- DCPU CN2 for proper connection and correct as necessary. 4 Change fuser unit. 5 Change PRCB. 6 Change DCPU.

• Code: 0F52
• Display: TE SENSOR Y
• Description: Toner level sensor /Y malfunction
  • An error occurs on the toner level sensor for each color.
• Remedy: 1 Check the connector between each sensor- PRCB PJ21 for proper connection and correct as necessary. 2 Replace the toner level sensor of the corresponding color. 3 Change PRCB.