Lexmark C520 Service Manual - Page 303

5022-xxx Installation notes: Do not install the printhead mounting screws in the rear of the printer. 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 the black skew is adjusted, the mounting screws will be fully tightened. 1. When installing the printhead, do a rough alignment by visually centering the hole in the frame (C) with the slot on the bottom of the printhead. Do not fully tighten printhead mounting screws until skew has been adjusted. C 2. Align the printhead. See "Printhead alignment" on page 4-3. 4-76 Service Manual