• 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 ASIC
  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.

• Code: C4000
• Description: Polygon motor synchronization problem
  The rated speed achievement signal won’t turn to L in 48 s since the polygon motor is activated.
• Causes: Poor contact in the connector terminals.
  Defective polygon motor.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective polygon motor. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4010
• Description: Polygon motor steady-state problem
  The rated speed achievement signal turns to H every other 24 s after the polygon motor is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective polygon motor.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC13 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective polygon motor. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.