• Code: 443
• Description: Image transfer unit error
  The machine detects the encoder sensor error.
• Causes: • Defective encoder sensor • Image transfer unit installation error • Defective image transfer unit motor
• Remedy: 1. Check if the image transfer unit is correctly set. 2. Replace the image transfer unit motor. 3. Replace the image transfer unit.

• Code: 452
• Description: Paper transfer unit contact error
  The paper transfer unit contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.
• Causes: • Defective paper transfer unit contact sensor • Defective paper transfer unit contact motor • Broken +24V fuse on PSU • Defective IOB
• Remedy: 1. Check the connection between the paper transfer unit and PSU. 2. Replace the paper transfer unit contact sensor. 3. Replace the paper transfer unit contact motor. 4. Replace the +24V fuse on the PSU. 5. Replace the IOB.

• Code: 460
• Description: Separation power pack output error
  An interrupt checks the status of the power pack every 20 ms. This SC is issued if the BICU detects a short in the power pack 10 times at D(ac).
• Causes: • Damaged insulation on the high-voltage supply cable • Damaged insulation around the high-voltage power supply.
• Remedy: 1. Replace the high-voltage supply cable. 2. Replace the high-voltage power supply unit. 3. Replace the IOB.

• Code: 490
• Description: Toner transport motor error
  The LOCK signal is not detected for 2 seconds when the transport motor turns on.
• Causes: • Toner transport motor overload • Disconnected or broken harness • Defective toner transport motor • Opened +24V fuse on the PSU • Defective interlock switch
• Remedy: 1. Check or replace the harness. 2. Replace the toner transport motor. 3. Replace the +24V fuse on the PSU. 4. Replace the interlock switch.

• Code: 491
• Description: High voltage power: Drum/ development bias output error
  An error signal is detected for 0.2 seconds when charging the drum or development.
• Causes: • High voltage leak • Broken harness • Defective drum unit or development unit • Defective high voltage supply unit
• Remedy: 1. Check or replace the harness. 2. Replace the drum unit or paper transfer unit. 3. Replace the high voltage supply unit.

• Code: 492
• Description: High voltage power: Image transfer/ paper transfer bias output error
  An error signal is detected for 0.2 seconds when charging the separation, image transfer bet or paper transfer roller.
• Causes: • High voltage leak • Broken harness • Defective image transfer belt unit or paper transfer unit • Defective high voltage supply unit
• Remedy: 1. Check or replace the harness. 2. Replace the image transfer belt unit or paper transfer unit. 3. Replace the high voltage supply unit.

• Code: 497
• Description: Temperature sensor error
  The thermistor output of the temperature sensor was not within the prescribed range (more than 0.5 V to less than 3.0 V).
• Causes:
• Remedy: 1. Turn the power switch off and on.

• Code: 498
• Description: Temperature and humidity sensor error 2
  • The thermistor output of the temperature sensor was not within the prescribed range (more than 0.5 V to less than 3.0 V). • The thermistor output of the humidity sensor was not within the prescribed range (less than 2.4 V).
• Causes: • Temperature and humidity sensor harness disconnected, loose, defective • Temperature and humidity sensor defective
• Remedy: 1. Check the connector and harness. 2. Replace the temperature/humidity sensor.