Xerox WorkCentre Pro 423 Service Manual page 267

Residual image (ghost)
C - 21
Copy sample
Symptom
Residual image (ghost)
(Toner images incompletely cleaned from drum or heat roller and reproduced on next
copy.)
Cause
Drum (At 94mm intervals)
• Poor cleaning of Drum
Drum (At 94mm intervals)
• Contamination, quality change
and deterioration of Drum
Fuser (At 94mm intervals)
• Contamination, quality change
and deterioration of
Heat/Pressure Roller
Fuser (At 94mm intervals)
• Faulty setting of Fuser
temperature
Toner (At 55mm intervals)
• Mag Roller failure
WorkCentre Pro 423/428
j0hn3024
Corrective action
• Replace CRU.
• Replace CRU.
• Clean or replace Heat/Pressure Roller.
• Check NVM setup data.
(Diag: [20-100 to 106])
• Replace CRU.
Finger Mark
C - 22
Copy sample
Symptom
Finger Mark
(Represents copies with toner spilled on the lead and trail edges.)
Cause
Faulty DTS
Deterioration of Toner
3-23 CHAPTER 3 IMAGE QUALITY TROUBLESHOOTING
j0hn3025
Corrective action
• Replace DTS.
• Replace HVPS.
• Replace CRU.
3.3 Image Quality Troubleshooting