Lexmark X543 Service Manual page 152

7525-xxx
Sensor 1 test
This test verifies the functionality of scan sensor 1. To test this sensor. perform the following steps:
1.
In the sensor test menu, press
2.
press Select (
3.
Lift the ADF top cover, and close the ADF cover sensor by pressing down on the ADF sensor actuator (A)
with a small flat blade screwdriver.
4. press the Sensor 1 actuator (B) located in the ADF paper path. Sensor 1: Open should display if the sensor
is working properly.
5.
press Back (
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Service Manual
or to scroll to the Sensor1 test.
). Starting Test displays. Sensor 1: Closed displays.
) to exit the test and return to the Scanner sensor tests.
A
B