• Code: C0620
• Description: Memory input interface problem
  • Reading-in of an image does not complete within 10 s of the start of image transmission.
• Causes: Defective main board
• Remedy: Replace the main board (KP-5060) and check for correct operation.

• Code: C0630
• Description: DMA problem
  • DMA transmission of compressed, decompressed, rotated, relocated or blanked-out image data does not complete within the specified period of time.
• Causes: Defective main board
• Remedy: Replace the main board (KP-5060) and check for correct operation.

• Code: C0800
• Description: Image processing problem
  • JAM05 is detected twice.
• Causes: Defective engine board
• Remedy: Replace the engine board (KP-5061) and check for correct operation.

• Code: C2000
• Description: Main motor problem
  • LOCK ALM signal remains high for 1 s, 1 s after the main motor has turned on.
• Causes: Poor contact in the main motor connector termi-nals. Defective main motor rotation control circuit. Defective drive transmission sys-tem.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the main 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 copy-ing the document placed on the con-tact glass.
• Causes: Poor contact of the connector ter-minals. Defective scanner home position sensor. Defective engine board (KP-5061) or scanner board (KP-5063). Defective scanner motor.
• Remedy: Check the connection of connectors YC10, 11 on the engine board (KP-5061) and the continuity across the connector terminals. Repair or replace if necessary. Replace the scanner home position sensor. Replace the engine board (KP-5061) or scanner board (KP-5063) and check for correct operation. Replace the scanner motor.

• Code: C3200
• Description: Exposure lamp problem
  • In indicator check before starting copying, the average value in scanning of the shading plate with the CCD is 128 or more.
• Causes: Defective scanner board (KP-5063). Defective exposure lamp or inverter board. Incorrect shading position. Poor contact of the connector terminals.
• Remedy: Replace the scanner board (KP-5063) and check for correct operation. Replace the exposure lamp or inverter board. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position sensor. Check the connection of connector YC-6 on the scanner board (KP-5063), and the continuity across the connector terminals. Repair or replace if necessary.

• Code: C3300
• Description: Optical system (AGC) problem
  • After AGC, correct input is not obtained at CCD.
• Causes: Insufficient exposure lamp luminosity. Defective scanner board (KP-5063). Incorrect shading position.
• Remedy: Replace the exposure lamp or inverter board. Replace the scanner board (KP-5063) 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.

• Code: C4000
• Description: Polygon motor synchronization problem • The polygon motor does not reach the stable speed within 15 s of the START signal turning on.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective engine board (KP-5061).
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Replace the engine board (KP-5061) and check for correct operation.