Step 4: Regicon #2 In/Out Skew Adjustment - Xerox Phaser 7700 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:
DC685-2 Passed
A Out Blocks: 24
B Out Blocks: 0
<Press Ok for more Data>
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 3-104 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.
Skew Corr. Y: -7 clicks CCW
Skew Corr. M: 7 clicks CW
Skew Corr. C: -5 clicks CCW
Skew Corr. K: -12 clicks CCW
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 4-125
Service Quick Reference Guide - Adjustments & Calibration
4-123