Lexmark C520 Service Manual - Page 230

5022-xxx 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. Printhead mechanical alignment Skew (black) 1. During installation of the printhead, the printhead's lower right corner slot (as seen when looking through the rear of the printer) and the hole in the frame (A) should have been visually aligned. Repair information 4-3