Adjustments; Printhead Assembly Adjustment - Lexmark T420 Service Manual

4048–00x

Adjustments

Printhead Assembly Adjustment

The printhead needs to be adjusted after it has been removed.
When reinstalling the (new) printhead, tighten the four screws
enough to contact the printhead frame. An adjustment is required
before tightening the screws.
Note:
– Adjust the printhead so that its body is parallel to the cross
brace of the printer frame. Further adjustment may not be
needed.
– Always check the printhead alignment after replacing the
RIP card assembly. Settings on the original RIP card may
not be the same as on the new card. Only a horizontal line
adjustment can be made; margins cannot be adjusted.
Contact the next support level or call Lexmark 1–800–539–
6275 for assistance.
To perform the registration check and adjustment:
1. Turn the printer off.
2. Open the front door.
3. Press and hold Cancel while turning the printer on.
4. Hold Cancel until the lights have cycled on and off
(approximately nine seconds).
5. Close the door when the Error light comes on.
Wait for the four top lights to stay on.
6. Press and release Cancel once and wait for the lights to change
to Ready/Data.
7. Press and release Cancel again and wait for Toner Low light.
8. Press and release Cancel again and wait for both Ready/Data
and Toner Low lights.
9. Press and hold Continue until lights cycle.
10. Once the printer starts, press Cancel.
These sheets continuously print if not canceled.
Use the sheets to check the margins and alignment.
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Service Manual