Xerox Phaser 7760 Service Manual page 431

Print Laser Check
NOTE: Must have 8 x 11 LEF media in Tray 1 (MPT) when performing this procedure.
Since all of the Laser Diodes are energized, all colors will be printed resulting in a composite
grey image. If the image is not composite grey, one or more of the diodes may be bad. If there
are gaps in the printout or the color is not uniform, the unit may required cleaning, adjustment,
or repair.
Figure 1 Print Laser Check
Revised
Phaser 7760 Color Laser Printer
Print Halftones
NOTE: Must have 8 x 11 LEF media in Tray 1 (MPT) when performing this procedure.
Selecting Print Halftones (Service Diagnostics Menu
tones) causes a group of six pages to print that consist of 80% solid fill on individual pages of
CMYK for primary colors and RG for secondary. Colors should be uniform from top to bottom of
the page with no mottling and the density for each color should be approximately equal.
January 2010
3-7
> Built-in Test Prints > Print Half-
Figure 2 Print Halftones
Engine Test Prints
Image Quality