• 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: 498
• Description: Temperature and humidity sensor error 2
  • The thermistor output of the temperature sensor was not within the prescribed range (0.5V to 4.2V). • The thermistor output of the humidity sensor was not within the prescribed range (0.01V to 2.4V).
• 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.

• Code: 501
• Description: Paper Tray 1 error
  • When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. • When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: • Disconnected or defective paper lift sensor • Disconnected or defective tray lift motor • Defective bottom plate lift mechanism • Too much paper in the tray • Defective IOB
• Remedy: 1. Check if the paper is not loaded too much. 2. Check if the bottom plate smoothly moves up and down manually. 3. Check and / or replace the tray lift motor / paper lift sensor. 4. Replace the IOB.

• Code: 502
• Description: Paper Tray 2 error
  • When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. • When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: • Disconnected or defective paper lift sensor • Disconnected or defective tray lift motor • Defective bottom plate lift mechanism • Too much paper in the tray • Defective IOB
• Remedy: 1. Check if the paper is not loaded too much. 2. Check if the bottom plate smoothly moves up and down manually. 3. Check and / or replace the tray lift motor / paper lift sensor. 4. Replace the IOB.