Lexmark T632 Service Manual - Page 111

4060-xxx Double feeding paper Note: If double feeding paper occurs mostly from the bottom of the stack, check for missing or damaged restraint pads in the tray. FRU 1 Paper 2 Autocompensator Action Paper is usually the primary cause of a double feeding paper problem. Flex the paper before placing the paper in the tray. Edgewelded paper is the most common cause of double feeding. Loading the paper in the tray in different locations and directions and using rough paper and short grain paper also causes double feeding. Make sure the counterbalance spring is not missing, loose, or broken at the top of the autocompensator arm assembly. If you find a problem, replace the autocompensator assembly. Multipurpose tray. Paper fails to feed from the multipurpose tray. The pick roll should make one complete revolution and stop with the flat side down. If the pick roll turns but does not pick paper, check the roll for signs of wear, oil or grease on the surface of the pick roll or slick spots. If you find a problem, replace the pick roll assembly. Check to ensure the media that is being fed through the multipurpose tray assembly meets recommended paper specifications. Parallel port service check Run the "Parallel Wrap Test" on page 3-9. Note: The Parallel Wrap Test is designed to check the parallel port hardware by using a wrap plug (P/N 1319128) and invoking the Parallel Diagnostic Test. This test helps isolate the printer from the parallel cable and host. The test provides failure information on the display for approximately three seconds. If the test indicates that a problem is detected, replace the controller board. Diagnostic information 2-77