Lexmark C77X, Service Manual

Page: 310 / 480

4-78
Service Manual
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e.
Repeat steps 13 through 16 as necessary until the line is within 1 and -1 on both ends.
17.
Remove both printhead alignment assemblies from the printer.
Warning: Leaving the printhead alignment assemblies in the printer can cause damage to the printer.
18.
Press Back ( ) to return to the main Diagnostic Menu.
19.
Perform the electronic alignment(s):
•
If a Black printhead is replaced, perform the “Black printhead electronic alignment” on page 4-78
and then the “Color printhead electronic alignment” on page 4-79 .
•
If a magenta, cyan, or yellow printhead is replaced, perform only the “Color printhead electronic
alignment” on page 4-79 .
Black printhead electronic alignment
After replacing the black printhead:
1.
Select REGISTRATION from the Diagnostic Menu.
2.
Select Quick Test .
3.
Set the top, bottom, left, and right margin in that order. The margins are set when the tip of the triangle
touches the edge of the page.
The print registration range is:
Note: Adjusting the Top and Left margins moves the entire image. Adjusting the Bottom and Right
margins causes the image to expand or compress. It is easier to adjust the Top and Left margins first, then
adjust the Bottom and Right.
4.
Perform the “Color printhead electronic alignment” on page 4-79 for all colors (not black).
Top Margin: -25 to +25 Increasing the value moves the image down the page. Always adjust the
top before the bottom margin.
Bottom Margin: -25 to +25 Increasing the value stretches the image toward the bottom of the page.
Left Margin: -15 to +15 Increasing the value moves the image toward the left margin. Always
adjust the left before the right margin.
Right Margin: -15 to +15 Increasing the value compresses the image to the left on the page.