Lexmark MX81 series Service Manual page 282

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Step B
Print a copy of the Quick Test Page, and check the top alignment indicators printed on the test page. The difference in
the print location to the top edge of the paper between the left and right alignment indicators should be 0.5mm (one
dot) or less. Depending on the skew, turn the screw either clockwise or counterclockwise using a 3mm hex wrench,
and print a copy of the Quick Test Page to check the diamonds on the top and bottom margin. Continue adjusting the
screw as you check the results of each adjustment on a new test page until the top image skew is below 0.5mm. One
full 360-degree turn of the aligner screw will change the top edge skew by roughly 1mm (2 alignment indicator dots).
Adjustment is typically 0-2 rotations. More than 3-4 turns, in either direction from the 20.5mm nominal spot, should
not be necessary and may indicate other issues with the tray (such as problems with the back and side restraints), pick
tires, or transfer roll mounting. If the top and bottom skew are below 0.5mm, the alignment process is complete.
Step C
Print a copy of the Quick Test Page, and check the top and bottom alignment indicators printed on the test page. The
goal is to make the skew at the top and bottom of the page parallel. Depending on the skew, turn the screw either
clockwise or counterclockwise using a 3mm hex wrench, and print a copy of the Quick Test Page to check the diamonds
on the top and bottom margin. Continue adjusting the screw as you check the results of each adjustment on a new test
page until you obtain the results you want. One full 360-degree turn of the aligner screw will change the leading edge
skew by roughly 1mm (2 alignment indicator dots).
Go to the polygon printhead mechanical registration adjustment procedure when this step is complete. See "Polygon
printhead mechanical registration adjustment" on page 281.
Repair information
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