Ricoh Aficio SP C440DN Field Service Manual page 571

No. Type
270 D Write ASIC communication error
• Write/read values were checked twice but failed to match.
• Parity error resulted after three attempts.
• Cycle the machine off/on.
• Harness between OPU and BCU loose, broken, defective
• Bridge board defective
• BCU defective
1. Replace the harness between the BCU and bridge board.
2. Replace the bridge board.
3. Replace the BCU.
No. Type
285 D Line position adjustment (MUSIC) error
Line position adjustment fails four consecutive times.
• Pattern sampling error ( insufficient image density )
• Defective ID sensors for the line position adjustment
• Defective image transfer belt unit
• Defective PCDU(s)
• Defective laser unit
1. Check and reinstall the image transfer belt unit and PCDU(s).
2. Check if each toner bottle has enough toner.
3. Replace the ID sensor.
4. Replace the image transfer belt unit.
5. Replace the PCDU(s).
6. Replace the laser unit.
Details (Symptom, Possible Cause, Troubleshooting)
Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC Tables
569