Lexmark X746de Service Manual page 229

Sensor Tests
Tests to evaluate the scanner sensors in the ADF and the flatbed (FB).
To view the sensor states:
Touch SCANNER TESTS from the Diagnostics Menu.
1.
Touch Sensor Test.
2.
A screen similar to the one below will display.
ADF Paper Present
FB Cover Open
Home Sensor
Skew Sensor
ADF Cover Sensor
ADF Exit Sensor
Scan Sensor
Jam Sensor
Paper FB Short
Paper FB Medium
Paper FB Long
Paper ADFF Short
Paper ADF Width 1
Paper ADF Width 2
The meaning of the states is listed in the table below:
Sensor Test descriptions (under Scanner Tests)
Sensor State
ADF Paper Present 0
1
FB Cover Open 0
1
Home Sensor 0
1
Skew Sensor 0
1
ADF Cover Open 0
1
ADF Exit Sensor 0
1
Scan Sensor 0
1
Jam Sensor1 0
1
Paper FB Short 0
1
Paper FB Medium 0
1
0
0
1
0
0
0
0
1
0
0
0
0
0
0
Description
Paper not present in ADF
Paper present in ADF
Flatbed cover closed
Flatbed cover open
Scanner carriage not positioned over home sensor
Scanner carriage positioned over home sensor
Paper not positioned over the ADF interval sensor
Paper positioned over the ADF interval sensor
ADF cover closed
ADF cover open
Paper not positioned over the ADF exit sensor
Paper positioned over the ADF exit sensor
Paper is not present above this sensor
Paper is being fed from the ADF, and the top edge passes over this sensor
Paper is not present above this sensor
Paper is being fed from the ADF, and the top edge passes over this sensor
Executive paper is not present on the flatbed or the scanner cover is not
closed
Executive paper is present on the flatbed, is covering the first length sensor,
and the scanner cover is closed
Letter paper is not present on the flatbed or the scanner cover is not closed
Letter paper is present on the flatbed, is covering the second length sensor,
and the scanner cover is closed
7526
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