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Phaser 7700 Color Laser Printer Service Manual
4-137
Step 3: RegiCon #1 Fine Skew Adjustment
This process uses sensors to examine the RegiCon image on the belt and
report what skew adjustments need to be made. A side effect of this test is
that horizontal and vertical alignments are automatically done (if the test
passed).
The data output presents the skew screw adjustment values (some number of
"clicks" of the screw, either CW or CCW direction). Values less than 5 or so
are "noise" and should not need adjusted.
1.
From the Service Diagnostics menu, highlight the
Adjustments/Calibration menu and press OK.
2.
Highlight Regi Con 685 Setup Cycle and press OK.
3.
At the prompt: Which DC685 procedure?, highlight #1 Fine Skew Setup
and press OK. The front panel now displays: <PostScript will do 685-1>
4.
The printer now reboots and runs the test. Wait for approximately 10
seconds after the motors turn off and the display indicates “Ready To
Print”, then cycle power and enter Service Diagnostics.
5.
Enter Adjustments/Calibration --> Regi Con 685 Results and press OK.
6.
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.
Please refer to section “Streaks in Direction of Paper
Travel” on page 3-111
to
resolve the print-quality
problems before proceeding further with RegiCon.
7.
Press OK to see the second panel data. If an adjustment is needed, adjust
by the smounts displayed on the front panel. Be sure to tap the screw that
was adjusted with a heavy screwdriver to ensure that the adjustment
remains true.
If the Belt Edge Learn procedure fails:
see “If RegiCon Coarse Skew Fails” on
page 4-136.
DC685-1 Passed
A Out Blocks: 24
B Out Blocks: 4
<Press Ok for more Data>
Skew Corr. Y: -7 clicks CCW
Skew Corr. M: 7 clicks CW
Skew Corr. C: -5 clicks CCW
Skew Corr. K: -12 clicks CCW
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