Printhead Assembly Mechanical Adjustment - Lexmark E250D - E B/W Laser Printer Service Manual

Printhead assembly mechanical adjustment

A printhead needs to be correctly positioned after it has been removed. Align it to the frame or use the same
position as the removed printhead. An indicator is located at the front right-hand screw for reference.
Note: Skew is caused by a sheet being fed through the printer while misaligned. The entire image is rotated
relative to the sheet edges. However, a mechanically misaligned printhead causes the horizontal lines to appear
skewed while the vertical lines remain parallel to the vertical edges.
There are no adjustments for skew. Check the pick roll (paper pick assembly) for wear, the paper path for
obstructions, the fuser for proper setting, and the tray paper guides for fit to the media.
To adjust the printhead:
1.
Enter the Diagnostics Menu. See
2.
Press and release
3.
Press and hold to print the first Cont Prt Simplex Tray 1 test page. Press
picks to avoid printing more pages.
4.
Fold the printed test page on the left side so that a few millimeters of grid lines wrap around the outside of
the fold. See photo below.
5.
Fold a second vertical fold near the center so that the left side top edge aligns with the right side top edge.
Printhead
Paper feed
skew
misalignment
"Diagnostics mode selections" on page
to go to Cont Prt Simplex Tray 1. (
4512-220, -230
3-8.
is on.)
immediately after the paper
Diagnostic aids
3-13