Vertical Bands, Voids, Or Streaks (In Paper Feed Direction) - Xerox Phaser 7100 Service Manual

IQ-4 Vertical Bands, Voids, or Streaks (In Paper Feed Direction)
There are extremely light or completely white streaks in the paper feed direction on the image.
Initial Action
• Check the paper transfer path is free of paper dust and debris.
Troubleshooting Reference
Applicable Parts
• Transfer Roller (2nd BTR), PL 4.3.18
• Imaging Unit (Y/ M/ C), PL 6.1.1
• Imaging Unit (K), PL 6.1.4
• ROS Assembly (Laser Unit), PL 7.1.1
• Developer Housing Assembly (Y/ M/ C/ K), PL 8.1.5 - PL 8.1.8
• IBT Unit, PL 9.1.99
• MCU PWB, PL 12.1.15
Troubleshooting Procedure
Step Actions and Questions
1. Check for the color that is causing the problem.
Obtain a sample for the color problem or perform
color print.
Is the problem only with a particular color?
2. Remove the Imaging Units (Y/ M/ C/ K)
Imaging Unit (Y/ M/ C/ K)
Check the Laser Unit window.
Is the Laser Unit window of a particular color (Y/
M/ C/ K) contaminated?
3. Check the Laser beam path.
Is there any obstruction between the Laser Unit
and the Imaging Units (Y/ M/ C/ K)?
Check the vicinity of the Developer Housing
Assembly (Y/ M/ C/ K) Developer Roller Bottom
Cover for stuck items such as fibers, etc.
Xerox Internal Use Only
(REP 6.0
on page 4-121).
Example Print
Yes
Go to step 2.
Take action only for
the applicable color.
Clean the Laser Unit
window for the
applicable color.
Remove the
obstruction.
Phaser 7100 Service Manual
Image Quality
Vertical Blank Lines
No
Go to step 2.
Take action without
color restriction.
Go to step 3.
Go to step 4.
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