Lexmark T642 Service Manual - Page 155

4061-xx0 The printer does not recognize the paper size selected FRU 1 Back restraint Side restraint Snap-in plate Autosize slider Autosize finger 2 Switch activate spring Paper size sending board 3 System board ITC cable 4 System board 5 Autocomp cable Action Check all the paper size parts for damage or broken parts. make sure the parts operate correctly. If a problem is found, repair as necessary. If no problem is found, go to step 2. Make sure the switch activate spring is not bent or broken. Replace the spring if damaged. If the spring is not damaged, go to step 3. Set the tray for the paper size that is not recognized and install the tray in the printer. Select the paper size and corresponding paper switch from table, below. Pin Signal J26 1 PSIZE2 2 Ground 3 PSIZE1 4 PSIZE3 5 6 7 8 +3.3 Static tray out (V dc) +3.3 0 +3.3 +3.3 +3.3 Static with paper tray in and set to: (V dc) Letter Legal A4 Exec B5 A5 0 0 +3.3 0 +3.3 0 0 +3.3 +3.3 N/A N/A N/A +3.3 +3.3 0 0 +3.3 +3.3 +3.3 0 0 0 +3.3 0 0 0 +3.3 +3.3 0 +3.3 0 +3.3 +3.3 9 N/A 10 N/A If the voltage on J26 does not change, go to step 4. If the voltage changes, recheck the printer. If Tray 1Missing is still displayed, replace the system board assembly. Ground the appropriate pin on connector J26 on the system board. Tray 1 Missing should not be displayed. If it is not displayed, go to step 5. If it still displays, replace the system board assembly. Check continuity of the autocomp cable. If correct, replace the ITC assembly. If incorrect, replace the autocomp cable. Diagnostic information 2-115