Xerox Phaser 7750DXF, Service Manual

Page: 199 / 505

Adjustments and Calibrations 6-11
4. Wait until the test results are displayed as follows:
Note
If the block counts are not the same number as presented here, the printer has
a print-quality problem. See "Streaks in Direction of Paper Travel" on
page 5-17
to resolve the print-quality problems before proceeding further
with RegiCon.
If RegiCon Coarse Skew Fails
This indicates that the horizontal alignment is so far out of adjustment that a manual
adjustment is required before the diagnostics test routines for fine skew can pass.
Other possible problems; a Mark-On-Belt Sensor failure, Developer, Developer Bias
Voltage, Imaging Unit, or Engine Control Board Failure.
■
Perform the "Coarse RegiCon Initialization" on page 6-12. This adjusts the
horizontal alignment closer and allows RegiCon #4 to pass.
■
After Coarse RegiCon Initialization is complete, perform RegiCon #4
(Coarse Skew Adjustment) again. Make the required adjustments.
Adjustments should be made only if the skew correction indicated is greater than five
clicks.
Adjustment screws are located behind the waste cartridge, which must be removed
for access. From left to right, the adjustment screws are: K, C, M, and Y.
Course Skew Setup
Black 46 Clicks CW
Cyan 47 Clicks CW
Magenta 47 Clicks CW
Yellow 40 Click CW
Min B Blocks: 4
Min A Blocks: 0
Passed