Lexmark 20G0482 - T 644tn B/W Laser Printer Service Manual page 154

4061-xx0
Tray 1 not recognized as being installed; unable to clear
FRU
1 Tray 1
2 Integrated card/
autocompensator cable
3
System board
2-114
Service Manual
Action
Check Tray 1 for damaged or broken autosize fingers. Check for
anything that would prevent the autosize fingers from activating the
paper activate springs and ITC switches.
If a problem is found, repair or replace the tray assembly. If no
problem is found, go to step 2.
Check for correct installation of the cable at J26 on the system board.
If installed correctly, go to step 3. If incorrectly installed, install and
recheck the printer.
Check the continuity between J26-2 on the system board and
ground. It should measure approximately 0 ohms.
message
Tray 1 Missing