Lexmark T520 Service Manual - Page 155

4520-xxx Print Quality Test Pages The purpose of this diagnostic function is to allow printing of the print quality test pages with the toner cartridge lockout function disabled. The print quality test consists of three pages. Page one contains a mixture of graphics and text. Pages two and three only contain graphics. If duplex is turned On, the pages are duplexed, otherwise the pages are printed on one side. The Print Quality Test pages are printed in English and must always be printed on letter, legal or A4 paper. Note: The print quality test pages can also be printed from the Configuration menu, however a cartridge must be installed with a machine class ID matching the machine class ID stored in NVRAM. Some diagnostic information may be printed on the pages when printing from this menu. To run the Print Quality Test Pages: 1. Turn the printer off. 2. Press and hold Select and Return. 3. Turn on the printer. 4. Release the buttons once Performing the Self Test displays. 5. The printer performs its normal POR cycle then print one copy of the Print Quality Test pages. If you want more than one copy, perform these steps again. The following is printed: • Diagnostic EP Setup: - fuser temperature, warm up time, transfer, print contrast and charge roll settings. • Contents of the Diagnostic Error Log. • Printer configuration information: - printer serial number, controller code level, engine code level, operator panel code level, smart option code levels, font versions, and so on. • Values for the Quality Menu settings used to print the pages. Diagnostic Aids 3-23