Lexmark X543 Service Manual page 264

7525-xxx
12.
Remove the sensor retaining plate (G), and then pinch the latches together to remove the tray present
sensor.
Installation notes:
1.
Clean the contact surface where you removed the sensor retaining plate, or where you need to install the
new one.
2.
Install the sensor.
Note: Make sure the clips on the posts latch to the frame.
3.
Remove the backing from the new plate, and place the plate on the surface between the sensor mounting
posts.
4.
Connect the cable to the tray present sensor.
5.
Replace the spring.
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Service Manual