• Code: C2000
• Description: Image formation motor problem • LOCK ALM signal remains high for 1 s, 1 s after the image formation motor has turned on.
• Causes: Poor contact in the image formation motor connector terminals. Defective image formation motor rotation control circuit. Defective drive transmission system.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the image formation motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

• Code: C2500
• Description:

  Paper feed motor problem• LOCK DRIVE signal remains high for1 s, 1 s after the paper feed motorhas turned on.

• Causes: Poor contact inthe paper feedmotor connectorterminals.Defective paperfeed motor rotationcontrol circuit.Defective drivetransmission system.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the paper feed motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

• Code: C2550
• Description:

  Drive motor problem• LOCK ALM signal remains high for 1s, 1 s after the drive motor has turnedon.

• Causes: Poor contact in the drive motor connector terminals. Defective drive motor rotation control circuit. Defective drive transmission system.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

• Code: C2640
• Description: Side deck drive motor problem • SDDM ALM signal remains high for 1 s, 1 s after the side deck drive motor has turned on.
• Causes: Poor contact in the side deck drive motor connector terminals. Defective side deck drive motor rotation control circuit. Defective drive transmission system.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the side deck drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

• Code: C3100
• Description: Scanner carriage problem • The home position is not correct when the power is turned on or copying the document placed on the contact glass.
• Causes: Poor contact of the connector terminals. Defective scanner home position switch. Defective engine PCB or scanner motor PCB. Defective scanner motor.
• Remedy: Check the connection of connector CN21 on the engine PCB and the continuity across the connector terminals. Repair or replace if necessary. Replace the scanner home position switch. Replace the engine PCB or scanner motor PCB and check for correct operation. Replace the scanner motor.

• Code: C3300
• Description: Optical system (AGC) problem • After AGC, correct input is not obtained at CCD.
• Causes: Insufficient exposure lamp luminosity. Defective main PCB. Incorrect shading position. CCD PCB output problem.
• Remedy: Replace the exposure lamp or inverter PCB. Replace the main PCB and check for correct operation. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position sensor. Replace the ISU.

• Code: C4000
• Description: Polygon motor synchronization problem • The polygon motor does not reach the stable speed within 10 s of the START signal turning on.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power source PCB. Defective junction B PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Check if 24 V DC is supplied to CN1-4 on the main PCB. If not, replace the power source PCB. Check if 24 V DC is output from CN5-7 on the junction B PCB. If not, replace the junction B PCB.

• Code: C4010
• Description: Polygon motor steady-state problem • The polygon motor rotation is not stable for 600 ms after the polygon motor rotation has been stabilized.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power source PCB. Defective junction B PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Check if 24 V DC is supplied to CN1-4 on the main PCB. If not, replace the power source PCB. Check if 24 V DC is output from CN5-7 on the junction B PCB. If not, replace the junction B PCB.