• Code: C2000
• Description: Drive motor problem LOCK ALM signal remains high for 1 s, 1 s after the drive motor has turned on.
• Causes: Poor contact of the connector terminals. Defective drive motor rotation control circuit. Defective drive transmission system.
• Remedy: Poor contact of the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective drive motor rotation control circuit. Replace the drive motor. Defective drive transmission system. 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 copying the document placed on the contact glass.
• Causes: Poor contact of the connector terminals. Defective scanner home position switch. Defective engine PWB. Defective scanner motor.
• Remedy: Poor contact of the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective scanner home position switch. Replace the scanner home position switch. Defective engine PWB. Replace the engine PWB and check for correct operation. Defective scanner motor. Replace the scanner motor.

• Code: C3200
• Description: Exposure lamp problem Non-lighting of the exposure lamp is detected at the beginning of copying.
• Causes: Poor contact of the connector terminals. Defective exposure lamp or inverter PWB. Defective engine PWB. Incorrect shading position.
• Remedy: Poor contact of the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective exposure lamp or inverter PWB. Replace the exposure lamp or inverter PWB. Defective engine PWB. Replace the engine PWB and check for correct operation. 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: Insufficient exposure lamp luminosity. Defective engine PWB. Incorrect shading position. Defective CCD PWB.
• Remedy: Insufficient exposure lamp luminosity. Replace the exposure lamp or inverter PWB. Defective engine PWB. Replace the engine PWB and check for correct operation. Incorrect shading position. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch. Defective CCD PWB. Replace the ISU.

• Code: C4000
• Description: Polygon motor synchronization problem The polygon motor does not reach the stable speed within 20 s of the START signal turning on.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the polygon motor connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective polygon motor. Replace the LSU. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4010
• Description: Polygon motor steady-state problem The polygon motor rotation is not stable for 5 s after the polygon motor rotation has been stabilized.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective engine PWB.
• Remedy: Poor contact in the polygon motor connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective polygon motor. Replace the LSU. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C4200
• Description: BD steady-state problem The MIC detects a BD error for 600 ms after the polygon motor rotation has been stabilized.
• Causes: Defective laser diode. Defective polygon motor. Defective main PWB. Defective engine PWB.
• Remedy: Defective laser diode. Replace the LSU. Defective polygon motor. Replace the LSU. Defective main PWB. Replace the main PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C6000
• Description: Broken fuser heater wire The temperature does not become 100C/212F even if 30 s pass before secondary stabilization. When there is no 1C/1.8F rise in 5 s before secondary stabilization.
• Causes: Poor contact in the thermistor connector terminals. Fuser thermistor installed incorrectly. Fuser thermostat triggered. Fuser heater M or S installed incorrectly. Broken fuser heater M or S wire.
• Remedy: Poor contact in the thermistor connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Fuser thermistor installed incorrectly. Check and reinstall if necessary. Fuser thermostat triggered. Check for continuity. If none, replace the fuser thermostat. Fuser heater M or S installed incorrectly. Check and reinstall if necessary. Broken fuser heater M or S wire. Check for continuity. If none, replace the heater lamp.