• 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 PCB. Defective engine PCB. Incorrect shading position.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the exposure lamp or inverter PCB. Replace the engine PCB and check for correct operation. 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 PCB. Incorrect shading position. Defective CCD PCB.
• Remedy: Replace the exposure lamp or inverter PCB. Replace the engine PCB and check for correct operation. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch. Replace the ISU.

• Code: C4000
• Description: Polygon motor synchronization problem
  • The polygon motor does not reach the stable speed within 15 s of the START signal turning on.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective engine PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Replace the engine PCB 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 PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Replace the engine PCB and check for correct operation.

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

• Code: C6000
• Description: Broken fixing heater wire
  • In fixing warm-up, the time to reach 50C/122F exceeds 13.5 s, the time to reach 100C/212F exceeds 10 s, the time to reach the primary stabilization exceeds 10 s or the time to reach the secondary stabilization exceeds 24 s.
• Causes: Poor contact in the thermistor connector terminals. Fixing thermistor installed incorrectly. Fixing thermostat triggered.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Check and reinstall if necessary. Check for continuity. If none, replace the fixing thermostat. Check and reinstall if necessary. Check for continuity. If none, replace the fixing heater M or S.

• Code: C6020
• Description: Abnormally high fixing unit thermistor temperature
  • The fixing temperature exceeds 230C/446F for 40 ms.
• Causes: Shorted thermistor. Broken heater control circuit on the power supply PCB.
• Remedy: Measure the resistance. If it is 0 Ω, replace the thermistor. Replace the power supply PCB and check for correct operation.

• Code: C6050
• Description: Abnormally low fixing unit thermistor temperature
  • The fixing temperature remains below 90C/194F for 1 s.
• Causes: Poor contact in the thermistor connector terminals. Broken fixing thermistor wire. Fixing thermistor installed incorrectly. Fixing thermostat triggered. Fixing heater M or S installed incorrectly. Broken fixing heater M or S wire.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Measure the resistance. If it is ∞Ω, replace the fixing thermistor. Check and reinstall if necessary. Check for continuity. If none, replace the fixing thermostat. Check and reinstall if necessary. Check for continuity. If none, replace the fixing heater M or S.