Lexmark Optra C Service Manual - Page 82

5045-001 Print Quality Before you perform the following service checks, do the following: • Be sure the paper or transparencies are the recommended finish and weight. If the paper weight is incorrect (too stiff), it may not provide 100% adhesion to the transfer drum. The trailing edge will not be attracted to the drum and will "flap" on each revolution causing blurs and smears at the bottom of the page. This may eventually transfer stray toner on to the back or front of the paper. • Be sure the printer and supplies are used in the proper environmental range. • If in doubt about a printer driver or other customer application, use the test prints described in the diagnostic aids. • Use the following start of call test to determine where the symptom exists. Cartridge End-of-Life When printing a large number of pages with a low percentage of color coverage, it is possible for the cartridge to wear out before using all the toner. Regardless of the amount of toner used, the internal rollers must make the same number of revolutions. Maximum cartridge life is approximately 5500 pages. Depending on color usage, it is possible to exceed this limit and still have a large quantity of toner remaining in the cartridge. This condition will lead to streaking and background, which will be covered elsewhere in this service check. Print Quality Start Of Call Refer to the Density Adjustment Panel (DAP) section, see "Density Adjustment Panel" on page 3-12. Run the following three tests described on page 3-12. Each test will isolate different print quality conditions as described. Before starting, be sure all color density settings on the DAP are set to nominal. 2-50