Lexmark C520 Series, Service Manual

Page: 157 / 259

Repair information
4-3
5022- xxx
Printer adjustments
Printhead alignment
Overview
When reinstalling the printhead, it is important to keep in mind that the printhead mounting screws should be
initially tightened just enough to hold the printhead in the printer. This allows the pages to be printed that will be
used to align the black plane to the printer frame and also allows skew adjustment with the printhead alignment
screw. Once black skew is adjusted, the mounting screws will be fully tightened.
There is one printhead that houses the four color planes. The black plane is aligned to the printer and the color
planes are internally aligned to black. Electrical alignment is done to fine tune the alignment of the color planes
to the black plane once the printhead is installed.
The first step in aligning the printhead is to set the skew for black. The following illustration shows proper skew
versus improper skew.
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