Ricoh Aficio SP C440DN Field Service Manual page 572

6. Troubleshooting
No. Type
290 D
No. Type
291 D
570
Details (Symptom, Possible Cause, Troubleshooting Procedures)
LDU shutter: Home position error
The machine does not detect the home position of the LDU shutter.
• Defective LDU shutter motor
• LDU shutter broken
• Overload on the LDU shutter motor
• Defective LDU shutter sensor
• Loose or disconnected harnesses between LDU shutter motor and BCU
• Defective BCU
1. Replace the LDU shutter.
2. Replace the LDU shutter motor.
3. Replace the harnesses between LDU shutter motor and BCU.
4. Replace the BCU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
LDU shutter: Open position error
The machine does not detect the correct open position of the LDU shutter.
• Defective LDU shutter motor
• LDU shutter broken
• Overload on the LDU shutter motor
• Defective LDU shutter sensor
• Loose or disconnected harnesses between LDU shutter motor and BCU
• Defective BCU
1. Replace the LDU shutter.
2. Replace the LDU shutter motor.
3. Replace the harnesses between LDU shutter motor and BCU.
4. Replace the BCU.