Lexmark E250D Service Manual - Page 91
Printhead assembly mechanical adjustment, to go to Cont Prt Simplex Tray 1.
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4512-220, -230 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. Paper feed skew Printhead misalignment 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 "Diagnostics mode selections" on page 3-8. 2. Press and release to go to Cont Prt Simplex Tray 1. ( is on.) 3. Press and hold to print the first Cont Prt Simplex Tray 1 test page. Press immediately after the paper 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. Diagnostic aids 3-13