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Phaser 840 Color Printer
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 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.
Increasing the scale value raises the two center black bars. Decreasing
the scale value lowers the two center black bars.
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
Summary of Contents for Phaser 840
Page 46: ...36 Phaser 840 Color Printer ...
Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...
Page 96: ...86 Phaser 840 Color Printer ...
Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...
Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...
Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...
Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...
Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
Page 142: ...132 Phaser 840 Color Printer ...
Page 154: ...144 Phaser 840 Color Printer ...