SC4xx: Image Processing
SM 6-31 D0CA/D0C9/D0C8/D0CB
6.5 SC4XX: IMAGE PROCESSING
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC442-00 D ITB Lift Motor Error
ITB Lift HP Sensor (S33) cannot detect the sensor feeler condition within a
specified time even when the ITB Lift Motor (M14) rotates.
• Contact/Release: 5 sec.
• Homing: 10 sec.
• Sampling interval: 0.01 sec.
• Broken harness or defective connectors
• Disconnected connector of ITB Lift HP Sensor (S33) or motor
• Defective ITB Lift Motor (M14)
• ITB unit not installed
1. Set the ITB unit firmly.
2. Replace the ITB unit.
3. Clean the ITB Lift HP Sensor (S33).
4. Check the harnesses.
5. Replace the ITB Lift HP Sensor (S33).
6. Replace the ITB Lift Motor (M14)
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC491-00 C High Voltage Power: Charge/Development Bias Output Error
Incorrect PWM signal is detected 10 times for consecutive 0.02 sec.
Hardware related causes:
• Contact failure
• Loose connector (Controller side)
• Grounding, open-circuit in the high voltage route
• Arc discharge due to lack of space
• Shorted harness (Controller side)
• BiCU malfunction (Signal error)
• High-Voltage Power Supply (Development) failure
Load related causes:
• Short-circuit
• Arc discharge due to lack of space
• Deteriorated drum (overcurrent)
• Condensated drum (overcurrent)
• Incorrect gap between drum and charge roller (incorrect PCDU)
• PCDU not installed firmly
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