• Code: 381
• Description: Drum gear position sensor error: M
  The machine does not detect the drum position signal for 3 seconds at the drum phase adjustment.
• Causes: • Dirty or defective drum gear position sensor
• Remedy: 1. Check the harnesses. 2. Clean or replace the drum gear position sensor. 3. Replace the PCDU.

• Code: 382
• Description: Drum gear position sensor error: C
  The machine does not detect the drum position signal for 3 seconds at the drum phase adjustment.
• Causes: • Dirty or defective drum gear position sensor
• Remedy: 1. Check the harnesses. 2. Clean or replace the drum gear position sensor. 3. Replace the PCDU.

• Code: 383
• Description: Drum gear position sensor error: Y
  The machine does not detect the drum position signal for 3 seconds at the drum phase adjustment.
• Causes: • Dirty or defective drum gear position sensor
• Remedy: 1. Check the harnesses. 2. Clean or replace the drum gear position sensor. 3. Replace the PCDU.

• Code: 396
• Description: Drum/Development motor error: K
  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. Check if torque output value for drum/development motor is proper if not replace the unit. 3. Replace the drum/development motor: K. 4. Replace the 24V fuse on the PSU.

• Code: 397
• Description: Drum motor error: CMY
  The machine detects a High signal from the drum motor: CMY for 2 seconds after the drum motor: CMY turned on.
• Causes: • Overload on the drum motor: CMY • Defective drum motor: CMY • Defective harness • Shorted 24 V fuse on the PSU • Defective interlock system
• Remedy: 1. Check or replace the harness. 2. Check if torque output value for drum motor is proper if not replace the unit. 3. Replace the drum motor: CMY. 4. 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 and -016. For details, refer to "ID sensor board" in the Replacement and Adjustment section. 3. Check the spring at the PTR unit contact lever. (See “PTR Unit Contact Motor” in the chapter “Replacement and Adjustment”.) 4. Replace the BCU. 5. Replace the ITB 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: Check the operation of the ITB unit motor with SP5804-051. No operation: 1. Check the harness of the ITB unit motor. 2. Check if the cleaning blade of the ITB cleaning unit is rolled up. 3. Replace the ITB unit motor. 4. Replace the ITB unit.

• 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: Check the operation of the ITB unit motor with SP5804-077. No operation: 1. Check the harness connection of the ITB contact motor. 2. Replace the ITB contact motor. Operation: 1. Check the harness connection of the ITB contact sensor. 2. Replace the ITB contact sensor.