Lexmark C750 Service Manual - Page 442

5060-00x Partial Print Test Diagnostic procedure for missing or faded planes 1. 2. 3. 4. 5. 6. 7. Turn the printer off. Remove all cartridges and the ITU. Inspect the bellcranks. Enter the Configuration Menu. See "Entering CONFIG MENU" on page 3-7. Select Prt Quality Pgs and press Select. Open the vacuum transport belt (VTB) jam access door and watch the test pages pass from left to right over the VTB. There is a delay between the first and second page. Once the pages are printed, examine the pages for to confirm the color plane is not printing. Note: The third page is particularly important since it is the image on the belt when the test printed. 8. Select Prt Quality Pgs and press Select. Open the VTB through the access door and, once again, watch the test pages pass over the VTB. 9. When the top half of the second page passes over the VTB, quickly open the front cover. The printing stops. Approximate final stopping place 10. Remove all four toner cartridges and set them face down. A-16 Service Manual