Lexmark MS71 Series, Руководство по обслуживанию, Страница: 272 / 645

5
Check the Quick Test Page for any sign of misalignment by checking the diamonds at the bottom left and bottom
right of the test page for equal distance from the bottom of the page. If necessary, rotate the printhead adjusting
screw with a 3mm hex wrench either clockwise (to rotate the image clockwise) or counterclockwise (to rotate the
image counterclockwise), and run another Quick Test Page. One full 360-degree turn of the printhead screw will
change the skew on both edges by roughly 0.5mm (1 alignment indicator dot). You may need to repeat this step
two or three times before you get satisfactory bottom skew results.
1 To correct, turn the printhead screw clockwise to rotate both edges clockwise.
2 To correct, turn the printhead screw counterclockwise to rotate both edges counterclockwise.
One full 360
‑
degree turn of the printhead screw will change the skew on both edges by roughly 0.5mm (one alignment
indicator dot).
Warning—Potential Damage: Caution should be taken to not turn the printhead adjustment mechanism more
than a few turns counterclockwise, for the screw will fully back out and will become disassembled. Stop turning
the screw when you stop feeling resistance, you may need to turn it clockwise to re-engage the screw into the
adjustment plate. Turning more than a few turns clockwise will bottom out the screw. If the adjustment screw is
difficult to turn, make sure that the printhead mounting screws are loose.
Warning—Potential Damage: In some cases the adjustment process may take several tightening and loosening
cycles of the printhead mounting screws. Care should be taken to avoid stripping the mounting screw bosses.
Use only a manual hex head screwdriver, for this reason.
6
When you have the correct adjustment, ensure that the printhead mounting screws are properly tightened, and
print a final Quick Test Page for verification.
7
Check the top edge skew and perform the media aligner roller adjustment, if required. See “Media aligner roller
adjustment” on page 269 .
Removal procedures
Keep the following tips in mind as you replace parts:
•
Some removal procedures require removing cable ties. You must replace cable ties during reassembly to avoid
pinching wires, obstructing the paper path, or restricting mechanical movement.
•
Remove the toner cartridges, imaging unit, and media tray before removing other printer parts. The imaging unit
should be carefully set on a clean, smooth, and flat surface. It should also be protected from light while out of the
device.
•
Disconnect all external cables from the printer to prevent possible damage during service.
•
Unless otherwise stated, reinstall the parts in reverse order of removal.
•
When reinstalling a part held with several screws, start all screws before the final tightening.
4063
Repair information
272