• Code: 399
• Description: Drum/Development motor error: Y
  The machine detects a High signal from the drum/development motor for 2 seconds after the drum/development motor turned on.
• Causes: • Overload on the drum/development motor • Defective drum/development motor • Defective harness • Shorted 24 V fuse on the PSU • Defective interlock system
• Remedy: 1. Check or replace the harness. 2. Replace the drum/development motor. 3. Replace the 24V fuse on the PSU.

• Code: 400
• Description: ID sensor adjustment error
  When the Vsg error counter reaches "3", the machine detects "SC400". The Vsg error counter counts "1" when the Vsg detected by ID sensor is more than the value (default: 4.5V) specified with SP3324-005 or less than the value (default: 3.5V) specified with SP3324-006.
• Causes: • Dirty or defective ID sensor • Defective ID sensor shutter
• Remedy: 1. Check the harness of the ID sensor. 2. Clean or replace the ID sensor. • After replacing the ID sensor, input the ID sensor correction coefficient with SP3362-013 to -018. For details, refer to "ID sensor board" in the Replacement and Adjustment section. 3. Replace the IOB. 4. Replace the image transfer belt unit.

• Code: 441
• Description: Image transfer unit motor error
  The motor LOCK signal is not detected for more than two seconds while the motor START signal is on.
• Causes: • Motor overload • Defective image transfer unit motor
• Remedy: 1. Replace the image transfer belt unit. 2. Replace the IOB.

• Code: 442
• Description: Image transfer belt contact motor error
  The image transfer belt contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.
• Causes: • Dirty image transfer belt contact sensor • Defective image transfer belt contact motor • Disconnected connector of image transfer belt contact sensor or motor • Disconnected cable
• Remedy: 1. Replace the image transfer belt contact sensor. 2. Replace the image transfer belt contact motor.

• Code: 443
• Description: Image transfer belt 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 belt unit is correctly set. 2. Replace the image transfer belt unit motor. 3. Replace the image transfer belt 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: High voltage power: Separation bias output error
  The status of the power pack is checked every 20 ms. This SC is issued if the EGB 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.