Xerox Phaser 6600 Service Manual page 340

Image Quality
Vertical blanks
Vertical White Band
Is the unit under test an MFP?
1 Check the error mode.
Does the error occur when copying or scanning?
2 Check the original.
Is the original color clean?
3 Clean the Scanner document glass and CVT glass
Does this solve your problem?
4 Clean the Laser lenses as described in "Cleaning the Laser Lenses"
on page 6-7.
Does this solve your problem?
5 Check the laser beam path.
Are there any foreign substances between the Laser Unit and the
Y/M/C/K drum?
Particularly, check if any fibers and others are not under around the
development roller bottom cover.
6 Check the paper transfer path.
Are there any smears or foreign substances on the path between
the paper entrance and the paper exit?
When the vertical blanks problem occurs, check if there are
problems such as foreign substances or rib deformation in the
corresponding location.
7 Replace the Imaging Units.
Does this solve your problem?
8 Check the intermediate transfer belt.
Is the Transfer Belt Assembly dirty, damaged, or torn, and does it
work correctly?
9 Check the Transfer Roller.
Is Transfer Roller contaminated, damaged, or worn, and does it
work correctly?
3-14 Phaser 6600 and WorkCentre 6605
Service Manual
Possible causative parts
• Toner Cartridge Y/M/C/K (PL5.1.8/PL5.1.9/PL5.1.10/PL5.1.11)
• Imaging Unit Y/M/C/K (PL8.1.2/PL8.1.3/PL8.1.4/PL8.1.5)
• Laser Unit (PL2.1.1)
• Transfer Roller (PL14.1.99)
• Transfer Belt Assembly (PL6.1.1)
• Scanner Assembly (PL51.1.1)
Action Yes
Go to action 1. Go to action 4.
Go to action 2. Go to action 4.
Go to action 3. Change the
original.
The task is Go to action 4.
complete.
The task is Go to action 5.
complete.
Remove the Go to action 6.
foreign
substance.
Remove the Go to action 7.
foreign
substance.
Replace the
causative part.
The task is Go to action 8.
complete.
Replace the Go to action 9.
Transfer Belt
Assembly.
Replace Contact Xerox
Transfer Roller. Technical
Support.
Xerox Internal Use Only
No