Polygon Printhead Mechanical Registration Adjustment - Lexmark MX81 Series Service Manual

7463
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 284.

Polygon printhead mechanical registration adjustment

Complete the printhead mechanical registration adjustment procedure when you remove or replace the printhead, or
loosen the mounting screws.
Repair information
284