Removal Procedures; Front Side Removals - Lexmark M5150 Service Manual

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
adjustment" on page

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.

Front side removals

•
"Duplex exit diverter removal" on page 381
•
"Front door removal" on page 383
•
"Inner guide deflector removal" on page 384
• "Laser printhead removal" on page 386
•
"Left inner cover removal" on page 390
•
"Media aligner roller removal" on page 392
• "Media turn guide removal" on page 394
•
"Media vertical guide removal" on page 395
•
"MPF feeder lift plate removal" on page 397
•
"MPF pick roller removal" on page 400
• "MPF solenoid removal" on page 402
•
"MPF tray removal" on page 404
•
"Right inner cover removal" on page 406
• "Sensor (input) removal" on page 407
•
"Sensor (toner density) removal" on page 408
376.
Repair information
380
4063
"Media aligner roller