Lexmark MX81 Series Service Manual page 285

Install the new printhead with the mounting screws lightly tightened before printing the registration Quick Test Page
to see if adjustment is needed. Before adjustment of the printhead, loosen each of the three mounting screws by a half
turn. This will leave the screws loose enough to allow the printhead to move within its slots as the adjustment screw
is rotated. If the adjustment plate was left alone during the laser printhead replacement, it will retain its position and
should minimize the amount of printhead mechanical registration adjustment needed. When the registration is set,
the three mounting screws should be tightened.
To perform the printhead mechanical registration adjustment:
1
Print a Quick Test Page. See
alignment indicators is greater than 0.5mm (1 dot), then proceed with adjustment. Otherwise, no polygon printhead
adjustment is needed.
2
Raise the paper support located in the top of the standard bin to its upright position to locate the three access holes
as shown in the illustration below.
3
Loosen, by a half turn, each of the three printhead mounting screws securing the printhead to the printer frame.
This will require a 5.5mm hex-socket screwdriver.
"Adjustments" on page 283. If the skew between the bottom left and bottom right
Repair information
285
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