Xerox Phaser 7700 Service Manual page 128

Streaks parallel with the leading edge
There are dark lines running parallel
with the leading edge of the print,
perpendicular to direction of paper
travel (B-size print shown). The
printer displays no error code.
Note
A-size prints are processed
through the printer with the short
edge of the print parallel to the
direction of the paper path --
making print artifacts parallel to
the long edge of the print.
B-size prints are processed
through the printer with the long
edge of the print parallel to the
paper path -- making artifacts
parallel to the short axis of the
print.
1. Inspect the paper that is loaded in
the paper tray. Is the paper wrinkled, dimpled, or show any signs of having a
high moisture content?
2. Does the band repeat at a specific interval? If so, troubleshoot using the
Repeating Defects topic.
3. Run the Remove Print Smears routine. From the front panel's Support Menu,
select Improve Print-Quality?, then select Remove Print Smears.
4. If the test prints are all okay, but prints from an application are not, replace the
Image Processor Board (RRP 39, on page 7-186).
Banding
1. Print the Repeating Defects pages. From the front panel's Printable Pages
Menu, select Service Pages, then select Print Repeating Defects Pages.
2.
Swap the Print Cartridges. If the defect still appears in the same color, the
problem is the developer. If the banding traveled, it is the print cartridge. All
colors is a problem with the Accumulator Belt.
3. Replace the Accumulator Belt Assembly (RRP 35, on page 7-180).
4. If the banding frequency is high (.5 mm), replace the Laser Unit (RRP 38, on
page 7-184).
Service Quick Reference Guide - Troubleshooting
Leading Edge
3041-43
3041-44
3-105