• 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: Defective scanner PWB. Defective scanner home position switch. Defective scanner motor. Poor contact in the connector terminals. The mirror frame, exposure lamp, or scanner wire is defective.
• Remedy: Defective scanner PWB. Replace the scanner PWB and check for correct operation. Defective scanner home position switch. Replace the scanner home position switch. Defective scanner motor. Replace the scanner motor. Poor contact in the connector terminals. Check the connection of connector YC4 on the scanner PWB and the connector on the scanner home position switch, and the connection of connector YC9 on the scanner PWB and the connector on the scanner motor and the continuity across the connector terminals. Repair or replace if necessary. 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.

• Code: C3200
• Description: Exposure lamp problem The exposure lamp is not turned on when starting the copy.
• Causes: Poor contact in the connector terminals. Defective scanner PWB. Defective CCD PWB. Defective exposure lamp or inverter PWB. Incorrect shading position.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the scanner PWB and the connector on the inverter PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective scanner PWB. Replace the scanner PWB and check for correct operation. Defective CCD PWB. Replace the CCD PWB and check for correct operation. 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.

• 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. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the scanner PWB and the connector on the inverter PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective exposure lamp. Replace the exposure lamp or inverter PWB. Defective PWB. Replace the SHD PWB or CCD 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 YC3 on the scanner PWB and the connector YC4 on the SHD PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the SHD PWB or CCD PWB and check for correct operation.

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

• Code: C3910
• Description: Backup memory data problem (scanner PWB) Data in the specified area of the backup memory does not match the specified values.
• Causes: Problem with the backup memory data. Defective scanner PWB.
• Remedy: Problem with the backup memory data. Run maintenance item U020 to initialize the backup memory data. Defective scanner PWB. If the C3910 is displayed after initializing the backup memory, replace the scanner PWB and check for correct operation.

• Code: C4000
• Description: Polygon motor synchronization problem The rated speed achievement signal won’t turn to L in 20 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 YC16 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 5 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 YC16 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.