Step 4: Regicon #2 In/Out Skew Adjustment - Xerox 7700DX - Phaser Color Laser Printer Service Manual

Step 4: RegiCon #2 In/Out Skew Adjustment

This test makes "magnification" adjustments for registration. Magnification is
the length of the scan line for the four colors, so that each scan line for each
color is the same length.
The data output can indicate PASSED, or READJUST (PASSED), or FAILED.
If the result is READJUST, the indicated adjustment values for the skew
adjustment should be done. It should not be necessary to rerun the test after
making this adjustment.
1. From the Service Diagnostics menu, highlight Adjustments/Calibration
menu and press OK.
2. Select Regi Con 685 Setup Cycle and press OK.
3. At the prompt: Which DC685 procedure?, select #2 In/Out Skew Setup,
select YES and press OK. The front panel now displays: <PostScript will
do 685-2>.
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. If the display indicates <DC685-2 READJUST (Passed)>, press OK to see
the second panel data. If an adjustment is needed, adjust by the amounts
displayed on the front panel. Be sure to tap the screw that was adjusted
with a heavy screwdriver to ensure the adjustment remains true.
When DC685-1 or DC685-2 Fails
The horizontal alignment error is excessive and a manual adjustment is
required before the diagnostics test routines for fine skew can pass. For
details of the Coarse RegiCon Init procedure, see "Coarse RegiCon
Initialization" on page 4-140.
4-138 Phaser 7700 Color Laser Printer Service Manual
DC685-2 Passed
A Out Blocks: 24
B Out Blocks: 0
<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