• Code: 201
• Description: Polygon motor error After the main switch turns on, the polygon motor is not phase-locked in several seconds.
• Causes: • Incorrect cable connection • Defective engine control board
• Remedy: 1. Connect the cable correctly. 2. Replace the engine control board. 3. Replace the laser scanning unit. 4. Check or replace the cable.

• Code: 230
• Description: V-Sync error Subscan signals are not asserted.
• Causes: • Incorrect cable connection • Defective engine control board
• Remedy: 1. Connect the cable correctly. 2. Replace the engine control board. 3. Replace the laser scanning unit. 4. Check or replace the cable.

• Code: 302
• Description: Charge or transfer bias error Charge bias in out of the normal range.
• Causes: • Defective PCU charge terminal • Defective transfer belt unit bias terminal • Defective terminal springs on bias terminal unit • Incorrect cable connection between high voltage supply and engine control board • Defective high voltage board
• Remedy: 1. Replace the PCU. 2. Replace the transfer belt unit. 3. Replace the bias terminal unit. 4. Connect the cable correctly. 5. Replace the high voltage board.

• Code: 440
• Description: PCU BK motor error The drive motor of the black PCU is not locked.
• Causes: • Defective gear • Defective gear on transfer belt unit • Voltage between pins 1 and 13 (CN12 on engine control board) abnormal (not +24V), or pin 11 (CN12 on engine control board) unable to send motor clock • Defective black PCU drive motor
• Remedy: 1. Replace the black PCU. 2. Replace the transfer belt unit. 3. Replace the engine control board. 4. Replace the main drive unit assembly.

• Code: 441
• Description: PCU (CMY) motor error The drive motor of the CMY PCU is not locked.
• Causes: • Defective gear • Voltage between pins 2 and 14 (CN12 on engine control board) abnormal (not +24V), or pin 12 (CN12 on engine control board) unable to send motor clock • Defective CMY PCU drive motor
• Remedy: 1. Replace the CMY PCU. 2. Replace the engine control board. 3. Replace the main drive unit assembly.

• Code: 471
• Description: Belt tension unit cam error Even though the belt tension unit tries to return to its home position several times, the home position sensor is not activated.
• Causes: • Defective transfer belt unit • Pin 3 (CN25 on engine control board) unable to send signal • Defective transfer belt tension unit
• Remedy: 1. Replace the transfer belt unit. 2. Replace the engine control board. 3. Replace the transfer belt tension unit.

• Code: 486
• Description: BK solenoid error The BK solenoid cannot drive the black PCU.
• Causes: • Defective connection between engine control board (CN21) and BK solenoid • Pin 1 (CN21 on engine control board) unable to send solenoid control signal • Defective drive unit
• Remedy: 1. Connect the cable between the engine control board (CN21) and BK solenoid correctly. 2. Replace the engine board. 3. Replace the drive unit.

• Code: 487
• Description: Solenoid error Any of the following solenoids has caused a short circuit: changer solenoid, paper feed solenoid, toner supply solenoid.
• Causes: • Solenoid drive transistor short-circuited
• Remedy: 1. Replace the engine controller board. 2. Replace the defective solenoid.