Lexmark C520 Series Service Manual page 160

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Note: If the right side of the print is missing, the visual alignment was too far off and the left side of the printhead
is too high. Rotate the alignment screw counterclockwise a full revolution and print the Quick Test page. Check
right side of print. Repeat screw rotation and printing of Quick Test page until a complete page prints.
6.
It is important that the top margin is set so that you can see the top left alignment mark. If this mark is not
present, scroll up in the operator panel and select Top Margin. Increase the value (right arrow) if the
alignment mark is off the page, decrease the value (left arrow) if the mark is down on the page. Press the
Select button, scroll down to Quick Test and press Select. Check the top margin alignment and repeat
top margin adjust until the top left alignment mark is close to the top edge of the print.
7.
Using the alignment marks on the top of the page, adjust the printhead alignment screw until you have
proper alignment. Rotate the alignment screw counterclockwise if the top right alignment mark is lower
than the top left alignment mark and clockwise if the top right is higher than the left. In some cases, the top
right mark may be off the page. You will have to repeat print the Quick Test page to see your printhead
adjustment. Continue adjusting the printhead alignment screw and reprinting the Quick Test page until the
skew is corrected. Save the last Quick Test print for use while adjusting black margins.
8.
Tighten the printhead mounting screws in the following order: top middle, lower left and lower right.
Reinstall the paper exit tray and the fuser cable cover.
9.
Scroll in the operator panel until you reach Top Margin. Press Select and adjust the margins until both
top alignment marks are on the top edge of the print. Increasing the value (right arrow) moves the
alignment marks down on the print. Decreasing moves them up. Print the Quick Test page and check the
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