• 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.
  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.

• Code: C3210
• Description: CIS lamp problem
  When input value at the time of CIS illumination does not exceed the threshold value between 5 s.
• Causes: Poor contact in the connector terminals.
  Defective DP driver PWB.
  Defective DP inverter PWB.
  Defective CIS.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the ISM PWB and the connector on the DP driver PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective DP driver PWB. Replace the DP driver PWB and check for correct operation.
  Defective DP inverter PWB. Replace the DP inverter PWB and check for correct operation.
  Defective CIS. Replace the CIS and check for correct operation.

• Code: C3300
• Description: Optical system (AGC) problem
  After AGC, correct input is not obtained at CCD.
• Causes: Poor contact in the connector terminals.
  Defective exposure lamp or inverter PWB.
  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.
  Defective PWB. Replace the ISM PWB, ISC PWB or CCD PWB and check for correct operation.

• Code: C3310
• Description: CIS AGC problem
  After AGC, correct input is not obtained at CIS.
• Causes: Defective DP driver PWB.
  CIS output problem.
  Defective DP inverter PWB.
• Remedy: Defective DP driver PWB. Replace the DP driver PWB and check for correct operation.
  CIS output problem. Replace the CIS and check for correct operation.
  Defective DP inverter PWB. Replace the DP inverter PWB and check for correct operation.

• Code: C3500
• Description: Communication error between scanner and SHD
  An error code is detected.
• Causes: Poor contact in the connector terminals.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the CCD PWB and the connector YC2 on the ISC PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the CCD PWB or ISC PWB and check for correct operation.

• Code: C3900
• Description: Backup memory read/write problem (ISC PWB)
  Read and write data does not match.
• Causes: Defective backup RAM or PWB.
• Remedy: Replace the ISC PWB or ISM PWB and check for correct operation.

• Code: C3910
• Description: Backup memory data problem (ISC PWB)
  Data in the specified area of the backup memory does not match the specified values.
• Causes: Defective backup RAM or PWB.
• Remedy: Replace the ISC PWB or ISM PWB and check for correct operation.