Lexmark C520 Service Manual - Page 81

5022-xxx Registration Print registration makes sure the black printing is properly aligned on the page. This is one of the steps in aligning a new printhead. See "Printhead alignment" on page 4-3. It is also the first step in aligning the duplex registration. See "Quick Test (duplex)" on page 3-12. The settings available are: Top Margin Bottom Margin Left Margin Right Margin Skew Quick Test To set print registration: 1. Select REGISTRATION from the DIAGNOSTICS menu. 2. Select Quick Test, and press . To print the Quick Test page: a. Press until the appears next to Quick Test. b. Press . The message Quick Test Printing... appears on the display. Retain this page to determine the changes you need to make to the margin settings. 3. Use 4. Use or to select the margin setting you need to change, and press . to decrease or to increase the offset values, and press to confirm the value. The message Submitting selection displays, and the original REGISTRATION screen appears with the beside the previously selected margin setting. The print registration range is: Description Bottom margin Top margin Left margin Right margin Skew Value -20 to +20 Each increment causes approximately 0.55 mm shift in the bottom margin. -25 to +25 Each increment corresponds to 8 scans at a 600 dpi scan rate (0.0133 inches or 0.339 mm). -25 to +25 Each increment corresponds to 4 pels at 600 dpi (0.00666 in. or 0.1693 mm). -10 to +10 Each increment corresponds to an approximate shift of 4 pels at 600 dpi. Each increment corresponds to 1/1200 of an inch. Direction of change A positive offset moves text up the page and widens the bottom margin, while a negative offset moves text down the page and narrows the bottom margin. A positive change moves the image down the page and increases the top margin. A negative change moves the image up and decreases the top margin. A positive change moves the image to the left, and a negative change moves the image to the right. No compression occurs. A positive change moves the image to the right, and a negative change moves the image to the left. A positive value causes the right end of the scan line to move down the page. A negative value causes the right end of the scan line to move up the page. The left end stays fixed. 3-4 Service Manual