Xerox 7700DX - Phaser Color Laser Printer Service Manual page 322

Grid 1-dot
This print is especially useful in the
manual process of registration when
the automatic process consistently fails
due to excessive process and lateral
margin adjustment. There are some
printer/laser positioning situations
where the intrinsic error in lateral
margin offset is too great for the
DC685-1 test to automatically
compensate for, and a manual
adjustment is required. The
Adjustments/Calibrations Menu:
Coarse RegiCon Init Test is required to
make these adjustments manually
before the DC685-1 test can pass.
When the YMK vertical lines are within
1-2 mm of the cyan line, DC685-1
should pass.
It is recommended that after doing the
Coarse RegiCon Init adjustments of the
lateral margin offsets, make another
grid 1-dot print. There have been some
printers that corrupt the NVRAM and
the lines do not end up where you
intended them to go. You may have to
experiment with a different order of
moving two or more lines to get the
S7700-293
desired results: all four colors within a
1-2 mm vertical "line."
Things to look for:
Mis-registration
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