Lexmark X642e Service Manual page 181

displays when there is paper in the high-capacity feeder input tray
Tray x Empty
FRU
1 Paper out sensor flag
2 Paper out sensor
(on option system board)
The elevator tray fails to stop at the correct position and continues to drive into the
bottom frame
FRU
1 Lower limit switch
Lower limit switch cable
2
High-capacity feeder
control board
The elevator tray down button does not operate. The tray moves to the upper position
Service tip: Open the high-capacity feeder front door and check the black rubber bumper attached to the door
switch spring. Be sure the rubber button is centered and not touching the sides of the hole or the switch will not
function properly.
FRU
1 Lower limit switch
Lower limit switch cable
High-capacity feeder
control board
Paper from the high-capacity feeder input tray does not reach the pass thru sensor
Service tip: Be sure the paper in tray is within specifications.
FRU
1 Autocompensator
assembly
2 Wear strips
Action
Check the paper out sensor flag for correct operation and installation.
If correct, replace the high-capacity feeder system board. (The paper
out sensor is mounted on the high-capacity feeder system board.)
Action
Check continuity of the lower limit switch. If incorrect, replace the
switch. If correct, check the switch cable. If incorrect, replace the
cable. If correct, replace the high-capacity feeder option control
board.
Disconnect the lower limit switch cable and check the voltage at J2-1
(orange). The voltage measures approximately +5 V dc. If incorrect,
replace the high-capacity feeder option control board.
Action
Check the lower limit switch to make sure it is not closed (normally
open). If incorrect, replace the switch. Check the lower limit switch
cable for a short between pins 1 and 2. If incorrect, replace the cable.
If correct, replace the high-capacity feeder control board.
Action
Check the autocompensator pick arm rollers for sign of glazing, toner
or other buildup. Replace as necessary.
Check the wear strips for glazing or contamination. Replace as
required. It is advisable to replace all four wear strips at the same
time.
7002-xxx
2-143
Diagnostic information