Image Quality
Xerox Internal Use Only Phaser 7100 Service Manual 3-35
IQ-11 Background Contamination
There is toner contamination on all or most of the page.
Initial Action
• Check the paper transfer path is free of paper dust and debris.
Troubleshooting Reference
Applicable Parts Example Print
• Imaging Unit (Y/ M/ C), PL 6.1.1
• Imaging Unit (K), PL 6.1.4
• Developer Housing Assembly (Y/ M/ C/ K), PL 8.1.5 - PL 8.1.8
• CTD Sensor Assembly, PL 9.1.10
• HVPS1 PWB, PL 12.2.15
Troubleshooting Procedure
Step Actions and Questions Yes No
1. Print 30 pages for each image type.
Does the error persist?
Go to step 2. Troubleshooting
complete.
2. Check the Imaging Unit installation.
Remove the Imaging Units (Y/ M/ C/ K) (REP 6.0
Imaging Unit (Y/ M/ C/ K) on page 4-121).
Is the Imaging Unit (Y/ M/ C/ K) installed
properly, with no deformation and
contamination at the contact points and it is in
contact with the left and right Guides?
Go to step 3. Inspect and clean the
contact points.
Reinstall the Imaging
Units (Y/ M/ C/ K) (REP
6.0 Imaging Unit (Y/
M/ C/ K) on
page 4-121).
3. Check the Charge Roller surface.
Is each Charge Roller surface of the Imaging
Unit (Y/ M/ C/ K) normal, with no contamination
or damage?
Go to step 4. Replace the Imaging
Unit for the applicable
color (REP 6.0 Imaging
Unit (Y/ M/ C/ K) on
page 4-121).