• Code: 381
• Description: Drum gear position sensor error: M, C, Y. The machine does not detect a change signal (H L or L H) for 2.4 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: K for 2 seconds after the drum/development motor: K turned on.
• Causes: • Overload on the drum/development motor: K • Defective drum/development motor: K • 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 • ID sensor detection surface dirty
• Remedy: 1. Check the harness of the ID sensor. 2. Clean with a damp cloth. • Do not clean with a dry cloth or a cloth containing alcohol. 3. Replace the ID sensor. • After replacing the ID sensor, input the ID sensor correction coefficient with SP3362-013 and -018. For details, refer to "ID sensor board" in the Replacement and Adjustment section. 4. Check the spring at the PTR unit contact lever. 5. Replace the BCU. 6. Replace the ITB unit.

• Code: 442
• Description: ITB contact motor error The ITB contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.
• Causes: • Dirty ITB contact sensor • ITB contact motor overload. • Defective ITB contact motor • Disconnected connector of ITB contact sensor or motor • Shorted 24 V fuse on the PSU. • Disconnected cable
• Remedy: Check the operation of the ITB unit motor with SP5804-083 or 084. 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.

• Code: 443
• Description: ITB unit error The machine detects the encoder sensor error.
• Causes: • Disconnect or defective harness • Defective ITB rotation sensor • ITB unit installation error • Defective ITB unit motor • ITB unit motor overload
• Remedy: 1. Check the harness connection of the ITB rotation sensor. 2. Check the trash or scratch on the encoder disc surface of the ITB rotation sensor. 3. Check if the ITB unit is correctly set. 4. Replace the ITB unit motor. 5. Replace the ITB unit.

• Code: 452
• Description: PTR (Paper Transfer Roller) contact error The PTR contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.
• Causes: • Defective PTR contact sensor • Defective PTR contact motor • PTR contact motor overload • Broken +24V fuse on PSU • Defective or disconnected harness. • Defective BCU
• Remedy: Check the operation of the PTR contact motor with SP5804-085 or 086. No operation: 1. Check the harness connection of the PTR contact motor. 2. Replace the PTR contact motor. Operation: 1. Replace the PTR contact sensor.

• 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 BCU 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 BCU.