• Code: C2500
• Description: MP 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 MP motor.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC24 on the engine PWB and the connector on the MP 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 MP motor. Run maintenance item U030 and check if the MP motor operates when YC24-2 (remote signal) on the engine PWB goes low. If not, replace the MP motor.
  Defective engine PWB. Run maintenance item U030 and check if YC24-3 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2550
• Description: Paper conveying 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 paper conveying motor.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the feed PWB and the connector on the paper conveying 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 paper conveying motor. Run maintenance item U030 and check if the motor operates. If not, replace the paper conveying motor.
  Defective PWB. Replace the feed PWB or engine PWB and check for correct operation.

• Code: C2600
• Description: PF paper conveying motor error (optional paper feeder)
  The lock signal of the motor is detected above 450 ms.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective paper PF conveying motor.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC27 on the engine PWB and the connector on the PF main PWB, 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 paper PF paper conveying motor. Replace the PF paper conveying motor.
  Defective PWB. Replace the PF main PWB or engine PWB and check for correct operation.

• Code: C2700
• Description: Color release motor error
  After driving of the color release motor starts, the error signal is not at the H level for 4 s continuously. After driving of the color release motor starts, the release signal does not turn to the L level within 5 s.
• Causes: Poor contact in the connector terminals.
  Defective color release motor
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC28 on the engine PWB and the connector of the color release motor, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective color release motor. Replace the color release motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation

• Code: C2810
• Description: Waste toner motor error
  After driving of the waste toner motor starts, the error signal is not at the H level for 2 s continuously.
• Causes: Poor contact in the connector terminals
  Defective drive transmission system.
  Defective waste toner motor.
  Defective engine PWB
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC12 on the engine PWB and the connector of the waste toner 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 waste toner motor. Replace the waste toner motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• 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: C3100
• Description: Scanner carriage problem
  The home position is not correct when the power is turned on or at the start of copying using the table.
• Causes: Poor contact in the connector terminals.
  Defective home position switch.
  Defective scanner motor.
  The mirror frame, exposure lamp, or scanner wire is defective.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the ISM PWB and the connector of the home position switch, and the connection of connector YC7 on the ISM PWB and the connector on the scanner motor and the continuity across the connector terminals. Repair or replace if necessary.
  Defective home position switch. Replace the scanner home position switch.
  Defective scanner motor. Replace the scanner motor.
  The mirror frame, exposure lamp, or scanner wire is defective. Check if the mirror flames and exposure lamp are on the rail. And check the scanner wire winds correctly.
  Defective PWB. Replace the ISM PWB or ISC PWB and check for correct operation.

• Code: C3200
• Description: Exposure lamp problem
  When input value at the time of exposure lamp illumination does not exceed the threshold value between 5 s.
• Causes: Poor contact in the connector terminals.
  Defective exposure lamp or inverter PWB.
  Incorrect shading position.
  Defective PWB
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the ISM PWB and the connector on the inverter PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective exposure lamp or inverter PWB. Replace the exposure lamp or inverter PWB.
  Incorrect shading position. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch.
  Defective PWB. Replace the ISM PWB, ISC PWB or CCD PWB and check for correct operation.