HP 750c Service Manual - Page 169

Window Sensor

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30. Window Sensor The purpose of this test is to verify the operation of the window sensor. Perform the window sensor test as follows: 1 In the Service Tests submenu, scroll to 30 Window Sensor" and press Enter. SERVICE TESTS 30 Window sensor 2 If the window is lowered then the Cover Down / Stop..." message is displayed on the frontĆpanel. Press the Down Arrow button to stop the test. 3 If the window is raised then the Cover Up / Stop..." message is displayed on the frontĆpanel. Press the Down Arrow button to stop the test. If the window is raised when the Cover Down / Stop..." message is displayed on the frontĆpanel, then the test has failed. If the window is lowered when the Cover Up / Stop..." message is displayed on the frontĆpanel, then the test has failed. If the test fails, try replacing the following components: 1 Window sensor ' page 6Ć20. 2 FrontĆpanel assembly ' page 6Ć18. 3 Main PCA ' page 6Ć9. Only replace one component at a time and perform the "Window Sensor" test again before replacing another component. Using this procedure you will be able to determine exactly which component failed. C4705-90000 Troubleshooting 8-51

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Troubleshooting
C4705-90000
8-51
30. Window Sensor
The purpose of this test is to verify the operation of the window sensor.
Perform the window sensor test as follows:
1
In the Service Tests submenu, scroll to ±30 Window Sensor" and press
Enter
.
SERVICE TESTS
30 Window sensor
2
If the window is lowered then the ±Cover Down / Stop..." message is displayed on the
frontĆpanel. Press the
Down Arrow
button to stop the test.
3
If the window is raised then the ±Cover Up / Stop..." message is displayed on the
frontĆpanel. Press the
Down Arrow
button to stop the test.
If the window is
raised
when the ±Cover Down / Stop..." message is displayed on the
frontĆpanel, then the test has failed.
If the window is
lowered
when the ±Cover Up / Stop..." message is displayed on the
frontĆpanel, then the test has failed.
If the test fails, try
replacing the following components:
1
Window sensor
'
page 6Ć20.
2
FrontĆpanel assembly
'
page 6Ć18.
3
Main PCA
'
page 6Ć9.
Only replace one component at a time and perform the “Window Sensor” test again before
replacing another component. Using this procedure you will be able to determine exactly which
component failed.