Lexmark Optra C Service Manual - Page 104

5045-001 Vertical Lines Service Check Note: Also see "Vertical Streaks" on page 2-59. FRU Action 1 Toner cartridge In which colors do the vertical lines appear? Replace the cartridges of the colors affected. Note: This can occur when cartridges are used at very low color coverage percentages, for extended (greater than 4K page) intervals. See "Low Color Coverage or Usage" on page 2-56. 2 Separation corona Do you see improvement after cleaning the separation wire corona wire? 3 Photoconductor Remove the photoconductor. Is the circumference of See * below the photoconductor flawed? Replace the photoconductor, only if it is damaged. 4 Fuser unit Is toner collected near the fuser entrance guide? Replace the fuser entrance guide. 5 Fuser unit 6 Fuser unit Is the circumference of the fuser upper roller flawed? After eliminating the cause of the flaw, replace the roller. Is the cleaning belt winding mechanism operating abnormally? Check whether the oil applying mechanism is abnormal. * It is possible to damage the photoconductor by running large quantities of the same image, containing dense vertical or horizontal lines. This is similar to how a CRT is "burned", by the same screen, over time. Normally, the output changes sufficiently to prevent this. 2-72