Xerox Phaser 7700 Service Manual page 126

Missing band in direction of paper travel
There are areas of the image that are
extremely light or are missing
entirely. These missing areas form
wide bands that run along the page
from leading edge to trailing edge in
the 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 short edge of the print.
1. Clean the laser windows with the
cleaning wand located in the front
door.
2. Print the solid fill test pages. From
the front panel's Printable Pages
Menu, select Service Pages, then
select Print Solid Fill Pages.
3. If the missing bands only occur in a single primary color, swap the print
cartridge.
4.
Replace the Developer Housing Assembly (RRP 27, on page 7-171).
5. Replace the Laser Unit (RRP 38, on page 7-184).
Service Quick Reference Guide - Troubleshooting
Leading Edge
3041-40
3-103