Diagnostics Mode - Xerox Phaser 7700 Service Manual

Diagnostics Mode

Laser Check:
This is a gray print with all four colors turned
on at about 25% fill.
Things to look for:
A hue shift that indicates one of the primary
CMYK colors is missing. A missing primary
indicates that the laser is faulty.
S7700-290
9-269
Service Quick Reference Guide - Test Prints