Tektronix Phaser 840, Руководство по обслуживанию

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Service Guide 105
X-axis scale adjustment
This adjustment sets the gain or rate-of travel of the printhead’s x-axis movement.
Perform this adjustment:
■
To correct thin, parallel pin stripes running the length of the page,
appearing evenly-spaced across the width of the page (not due to a
weak or missing jet).
■
Anytime the NVRAM chip (Phaser 840 printer) or BootROM/Printer ID
chip (Phaser 850 printer) is replaced
■
Anytime an X-axis component is replaced.
1. Allow the printer to warm up to its idle, “Ready to Print,” state.
2. Enter the “hidden” service menu by scrolling to the
Troubleshooting
menu and pressing Select. Then press and hold the Left arrow button
and, while holding the Left arrow button, press Select.
3.
Scroll to the service menu item
Test Prints
and press Select. Choose
the test print
1: X-axis Motion
and press Select to print it.
4. Interpret the second of the two X-axis motion prints. The print features
four purple columns, each containing a jagged black band. The black
bands should all align horizontally with each other.
5. If an adjustment is needed, scroll to the menu item
Set X-axis Scale
.
Change the displayed value to a new value, if necessary, as indicated by
the test print
6. Select the menu item
Print X-axis calibration pattern
to verify
the adjustment. Repeat the adjustment, if necessary.
Adjusting the x-axis scale adjustment
0388-67
Increase scale
adjust to raise
center bars Correct Decrease scale
adjust to lower
center bars