• Code: 1AH
• Description: Abnormally high heating roller temperature
  • The temperature detected by the thermistor is a predetermined value or higher for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the fusing unit, DCPU1, and PRCB for proper connection and correct as necessary. 3 Check the lever of the safety switch and correct as necessary. 4 Change the fusing unit. 5 Change PRCB. 6 Change DCPU1.

• Code: 1BH
• Description: Faulty thermistor
  • The condition of a temperature rise of less than 1°C extends continuously for a predetermined period of time that begins when the warm-up cycle is started.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the fusing unit, DCPU1, and PRCB for proper connection and correct as necessary. 3 Check the lever of the safety switch and correct as necessary. 4 Change the fusing unit. 5 Change PRCB. 6 Change DCPU1.

• Code: 21H
• Description: Faulty OHP sensor
  • It is determined that the OHP sensor is faulty through a check made at the end of the predrive.
• Remedy: 1 Check the PRCB connector for proper connection and correct as necessary. 2 PS2 sensor check. 3 Change PRCB.

• Code: 23H
• Description: Faulty waste toner near full detection board
  • It is determined that the LED and photo receiver are faulty through a check made when a new drum cartridge is detected.
• Remedy: 1 Check the WTDTB/LED connector for proper connection and correct as necessary. 2 Check the PRCB connector for proper connection and correct as necessary. 3 Change the drum cartridge. 4 Change WTDTB/LED. 5 Change PRCB.

• Code: 24H
• Description: Faulty fusing thermistor resistor
  • The heater lamp remains ON for a predetermined consecutive period of time.
• Remedy:

• Code: 29H, 2AH. 2BH, 2CH
• Description: Trouble related to security
  • Contact the responsible people of KONICA MINOLTA when not returning in power switch OFF/ON.
• Remedy:

• Code: 2DH
• Description: Trouble related to security
  • Re-write the controller firmware.
  • Contact the responsible people of KONICA MINOLTA when not returning in power switch OFF/ON.
• Remedy:

• Code: 31H
• Description: IR cooling fan motor malfunction
  • The fan motor lock signal remains HIGH for a predetermined consecutive period of time while the cooling fan motor remains energized.
• Remedy: 1 Check the FM3 connector for proper connection and correct as necessary. 2 Check FM3 for proper drive coupling and correct as necessary. 3 Check the PRCB connector for proper connection and correct as necessary. 4 FM3 operation check. 5 Change PRCB. 6 Change DCPU2. 7 Change DCPU1.