Xerox Phaser 7700 Service Manual page 130

Repetitive mark appears on each print
An identical mark or image appears on each, or every other, printed image.
1.
From the front panel's Support Menu, select Improve Print-Quality?, then
select Remove Print Smears. This function passes several blank sheets of
paper through the printer to clean the fuser rollers.
2. From the front panel's Printable Pages Menu, select Service Pages, then select
Repeating Defects page. The Repeating Defects page contains rulers to help
determine the source of the repeating defects.
84 mm (3.3 in.) Fuser
94 mm (3.7 in.) Fuser (mark in all colors) or print cartridge (mark in single
color)
88 mm (3.5 in.) Transfer roller (2nd bias)
44 mm (1.7 in.) Print cartridge
28.3 mm (1.1 in.) Developer housing roller
Service Quick Reference Guide - Troubleshooting
3041-48
3-107