Lexmark T522 Service Manual - Page 122

4520-xxx Print Quality - Background Service Tip: Some background problems can be caused by rough papers, non-Lexmark toner cartridges or if the media texture is set to the rough setting. Some slick or coated papers may also cause background. Some problems occur with printers that run a large amount of graphics in a humid environment. The customer may try to improve the print quality by increasing the transfer setting. Check the charge roll to make sure it is not at the end of life. FRU 1 Printhead 2 Transfer Roll Assembly 3 High Voltage Contacts Action The printhead on the Lexmark T printers cannot be cleaned. Try another printhead if all other attempts fail to correct a background problem. Check the high voltage contact from the HVPS to the transfer roll. Check the transfer arm assembly right side bearing for any signs of contamination, pitting or a loose cable to the bearing. If any problems are found, replace the defective part. Check the transfer roll shaft for any signs of contamination, wear or pitting on the ends of the shaft that go into the bearings. If a problem is found, clean the ends of the shaft or replace the transfer roll assembly. Check the high voltage contacts on the right side frame to ensure they are clean and not bent, deformed, or pitted. If incorrect, replace the contact. 2-94 Service Manual