Lexmark T642 Service Manual - Page 153

4061-xx0 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. Paper size sensing service check Before proceeding, check for the correct paper size loaded in the tray and that the tray has been set to accept the size paper loaded in the tray. SW2 SW1 SW0 CN1 1 Paper size sensing switch chart ITC CN1 pin Signal 1 PSIZE2 2 Ground 3 PSIZE1 4 PSIZE3 ITC switch SW1 Ground SW0 SW2 Paper tray size selection (X is activated) Letter Legal A4 X X Exec B5 X X X X X X A5 X System board J34 pin 1 2 3 4 Diagnostic information 2-113