• Code: C2950
• Description: Motor control PWB communication error
  A communication error from motor control PWB is detected 10 times in succession.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC14 and YC15 on the engine PWB and the connector of the motor control PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the motor control PWB or engine PWB and check for correct operation.

• Code: C4000
• Description: Polygon motor synchronization problem
  The rated speed achievement signal won’t turn to L in 48 s since the polygon motor is activated.
• Causes: Poor contact in the connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective polygon motor. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4010
• Description: Polygon motor steady-state problem
  The rated speed achievement signal turns to H every other 24 s after the polygon motor is stabilized.
• Causes: Poor contact in the connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective polygon motor. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4100
• Description: BD initialization problem
  When power is turned on, ASIC of engine PWB detects a BD error for 1 s after the polygon motor is activated.
• Causes: Poor contact in the connector terminals. Defective laser scanner unit. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective laser scanner unit. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4200
• Description: BD steady-state problem
• Causes: Poor contact in the connector terminals. Defective laser scanner unit. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective laser scanner unit. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C5101
• Description: Main high-voltage K error
  Abnormality of charger roller K is detected when Vpp adjustment.
• Causes: Installation defectiveness on charger roller unit K. Defective charger roller unit K.
• Remedy: Installation defectiveness on charger roller unit K. Check the mounting state of the charger roller unit K. If any problem is found, repair or replace the unit.
  Defective charger roller unit K. Replace the charger roller unit K.

• Code: C5102
• Description: Main high-voltage C error
  Abnormality of charger roller C is detected when Vpp adjustment.
• Causes: Installation defectiveness on charger roller unit C. Defective charger roller unit C.
• Remedy: Installation defectiveness on charger roller unit C. Check the mounting state of the charger roller unit C. If any problem is found, repair or replace the unit.
  Defective charger roller unit C. Replace the charger roller unit C.

• Code: C5103
• Description: Main high-voltage M error
  Abnormality of charger roller M is detected when Vpp adjustment.
• Causes: Installation defectiveness on charger roller unit M. Defective charger roller unit M.
• Remedy: Installation defectiveness on charger roller unit M. Check the mounting state of the charger roller unit M. If any problem is found, repair or replace the unit.
  Defective charger roller unit M. Replace the charger roller unit M.