Xerox WorkCentre Pro 423 Service Manual page 266

WorkCentre Pro 423/428
Magnification failure Copy sample
C - 19
Symptom
l Magnification failure
l Vertical magnification failure of DADF Use Diag Code [21-80] to [21-87] for adjustment.
Cause
Faulty IPS PWB (Horizontal
magnification failure)
Full/Half Rate Carriage Installation
Position failure
Installation failure of CCD Assy
Application/Driver failure (when
using printer)
j0hn3022
Corrective action
• Replace IIT/IPS PWB.
• Install Carriage correctly.
• Replace CCD Assy.
• Replace Application/Driver.
3-22 CHAPTER 3 IMAGE QUALITY TROUBLESHOOTING
Poor resolution
C - 20
Copy sample
Symptom: Poor resolution
(Copies of unsharp images throughout entire area)
Cause
Quality change of Drum
Full/Half Rate Carriage installation
position failure
Loose ROS Assy/Internal failure
Faulty setting of Control board
IIT/IPS
3.3 Image Quality Troubleshooting
j0hn3023
Corrective action
• Replace CRU.
• Install Carriage correctly.
• Reinstall or replace ROS Assy.
• Check NVM setup data.