• Code: C026
• Description: Memory copy PCB 1 communication problem • There is no reply after five retries at transmitting. • There is no reply after five retries at receiving.
• Causes: Poor contact of the connector terminals. Defective main PCB or memory copy PCB 1.
• Remedy: Check the connection of connector CN2 on the main PCB and the connector on memory copy PCB 1. Repair or replace if necessary. Replace the main PCB or memory copy PCB 1 and check for correct operation.

• Code: C032
• Description: Large paper deck communication problem 1 • Communication errors from the communication microcomputer (IC56) on the main PCB: No communication: there is no replay after 3 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact of the connector terminals. Defective engine PCB. Defective main PCB. Defective deck main PCB.
• Remedy: Check the connection of connector CN17 on the engine PCB and the connector CN9 on the deck main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the engine PCB and check for correct operation. Replace the main PCB and check for correct operation. Replace the deck main PCB and check for correct operation.

• Code: C032
• Description: Paper feed desk communication problem 3 • An error code from the paper feed desk is detected eight times in succession. No communication: there is no reply after 3 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact of the connector
  terminals. Defective engine PCB.
  Defective main PCB. Defective desk main PCB.
• Remedy: Check the connection of connectors CN17 on the engine PCB and CN2 on the desk main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the engine PCB and check for correct operation. Replace the main PCB and check for correct operation. Replace the desk main PCB and check for correct operation.

• Code: C034
• Description: Finisher communication problem 2 • Communication errors from the communication microcomputer (IC56) on the main PCB: No communication: there is no reply after 3 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact of the connector terminals. Defective engine PCB. Defective main PCB. Defective finisher main PCB.
• Remedy: Check the connection of connectors CN21 on the engine PCB and CN2 on the finisher main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the engine PCB and check for correct operation. Replace the main PCB and check for correct operation. Replace the finisher main PCB and check for correct operation.

• Code: C036
• Description: Memory copy PCB 2 communication problem 1 • There is no reply after five retries at transmitting. • There is no reply after five retries at receiving.
• Causes: Poor contact of the connector terminals.
• Remedy: Check the connection of connector CN3 on the main PCB and the connector on memory copy PCB 2. Repair or replace if necessary.

• Code: C037
• Description: Communication microcomputer problem • A problem is detected with the communication microcomputer (IC56) on the main PCB.
• Causes: Defective main PCB or memory copy PCB 2. Defective main PCB.
• Remedy: Replace the main PCB or memory copy PCB 2 and check for correct operation. Replace the main PCB and check for correct operation.

• Code: C104
• Description: Optical system problem • After AGC, correct input is not obtained at CCD.
• Causes: Insufficient exposure lamp luminosity. Defective mainPCB. Incorrect shading position. CCD PCB output problem.
• Remedy: Replace the exposure lamp or inverter PCB. Replace the mainPCB. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch. Replace the ISU.

• Code: C200
• Description: Drive motor problem • DM LOCK signal remains high for 1 s, 1 s after the drive motor has turned on.
• Causes: Poor contact of 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.