• Code: C2271
• Description: Drum position sensor K error
  While the drum rotates two turns, no signal is input to the sensor.
• Causes: Poor contact in the connector terminals.
  Defective drum position sensor K.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC3 on the main front PWB and the connector of the drum unit K, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum position sensor K. Replace the drum unit K.
  Defective PWB. Replace the main front PWB or engine PWB and check for correct operation.

• Code: C2272
• Description: Drum position sensor C error
  While the drum rotates two turns, no signal is input to the sensor.
• Causes: Poor contact in the connector terminals.
  Defective drum position sensor C.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the sub front PWB and the connector of the drum unit C, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum position sensor C. Replace the drum unit C.
  Defective PWB. Replace the sub front PWB or engine PWB and check for correct operation.

• Code: C2273
• Description: Drum position sensor M error
  While the drum rotates two turns, no signal is input to the sensor.
• Causes: Poor contact in the connector terminals.
  Defective drum position sensor M.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC7 on the sub front PWB and the connector of the drum unit M, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum position sensor M. Replace the drum unit M.
  Defective PWB. Replace the sub front PWB or engine PWB and check for correct operation.

• Code: C2274
• Description: Drum position sensor Y error
  While the drum rotates two turns, no signal is input to the sensor.
• Causes: Poor contact in the connector terminals.
  Defective drum position sensor Y.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC3 on the sub front PWB and the connector of the drum unit Y, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum position sensor Y. Replace the drum unit Y.
  Defective PWB. Replace the sub front PWB or engine PWB and check for correct operation.

• Code: C2300
• Description: Fuser motor error
  After the motor drive ON signal is output and 1 s elapses, the rated speed reach signal is not input continuously for 2 s.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective fuser motor.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC25 on the engine PWB and the connector of the fuser motor, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective fuser motor. Run maintenance item U030 and check if the fuser motor operates when YC25-B4 (remote signal) on the engine PWB goes low. If not, replace the fuser motor.
  Defective engine PWB. Run maintenance item U030 and check if YC25-B4 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2351
• Description: Cleaning motor K error
  After the motor drive ON signal is output and 1 s elapses, the rated speed reach signal is not input continuously for 2 s.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective cleaning motor K.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC16 on the engine PWB and the connector of the cleaning motor K, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective cleaning motor K. Run maintenance item U030 and check if the cleaning motor K operates when YC16- B13 (remote signal) on the engine PWB goes low. If not, replace the cleaning motor K.
  Defective engine PWB. Run maintenance item U030 and check if YC16-B13 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2352
• Description: Cleaning motor MCY error
  After the motor drive ON signal is output and 1 s elapses, the rated speed reach signal is not input continuously for 2 s.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective cleaning motor K.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC16 on the engine PWB and the connector of the cleaning motor MCY, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective cleaning motor K. Run maintenance item U030 and check if the cleaning motor MCY operates when YC16-A13 (remote signal) on the engine PWB goes low. If not, replace the cleaning motor MCY.
  Defective engine PWB. Run maintenance item U030 and check if YC16-A13 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2400
• Description: Eject motor error
  After the motor drive ON signal is output and 1 s elapses, the rated speed reach signal is not input continuously for 2 s.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective eject motor.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC25 on the engine PWB and the connector on the eject motor, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective eject motor. Run maintenance item U030 and check if the eject motor operates when YC25-A5 (remote signal) on the engine PWB goes low. If not, replace the eject motor.
  Defective engine PWB. Run maintenance item U030 and check if YC25-A5 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.