Xerox Phaser 7700 Service Manual page 127

Streaks in direction of paper travel
There are dark lines running along
the page in the direction of paper
travel from the leading edge to the
trailing edge (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 horizontal print artifacts
parallel to the shot 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 horizontal
artifacts parallel to the long axis
of the print.
1.
Check the end of life for each of
the consumables by printing the
supplies usage page. From the front panel's Printable Pages Menu, select
Print Supplies Page.
2.
Run the solid fill test pages; From the front panel's Printable Pages Menu,
select Service Pages, then select Print Solid Fill Pages. If the missing bands
only occur in a single primary color, replace the print cartridge of the affected
color.
3.
Swap print cartridges and run another test print.
Note
Under some circumstances, streaking may occur in the margin of
SRA3-size paper. This is due to the edges of the paper extending
beyond the end of the imaging components. print-quality in the
margins of SRA3 paper is not guaranteed.
4.
Inspect the Accumulator Belt cleaner; replace the cleaner, if necessary.
5.
Run the Remove Print Smears routine. From the front panel's Support Menu,
select Improve Print-Quality?, then select Remove Print Smears.
6.
Replace the Developer Housing Assembly (RRP 27, on page 7-171).
7.
Remove the print cartridge and (with a flashlight) check for debris along the
edge of the developer housing.
3-104 Phaser 7700 Color Laser Printer
Leading Edge
3041-42