4-2 Service Manual
4500
Adjustment
Printhead assembly
The printhead may need to be adjusted after it has been reinstalled.
Tighten the four screws just enough to still move the printhead
frame.
Note: Always check the printhead alignment after replacing the
operator panel assembly. Settings on the original card may
not be the same as on the new operator panel card. Only a
skew adjustment can be made; margins cannot be adjusted.
Contact the next level of support or call Lexmark
(800) 539–6275 for assistance with margins.
To perform the registration check and adjustment:
1. Open the front door.
2. Press and hold Cancel while turning the printer on.
3. Hold Cancel until the lights have cycled on and off.
4. Close the door when the Error light comes on. Wait for the four
top lights to stay on.
5. Press and release Cancel once and wait for Ready/Data to
come on.
6. Press and release Cancel again and wait for Toner Low light.
7. Press and release Cancel again and wait for both Ready/Data
and Toner Low lights.
8. Press and hold Continue until lights cycle.
9. Once the printer starts to print, press Cancel or the same sheet
prints continuously.
Check margins and skew (top or bottom lines relative to edge of
paper). See Note above.
10. Adjust the printhead as necessary.
This adjustment can only correct for skew. Adjust the left side of
the printhead until the top (or bottom) line is parallel to the paper
edge.
11. After obtaining a proper adjustment, tighten all four screws.
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