HP 750 - Manual (Page 168)

8-50 Troubleshooting C4705-90000
29. Media Sensor
The purpose of this test is to verify the operation of the media sensor with or without media.
Perform the media sensor test as follows:
Remove any loaded media before performing this test.
1 In the Service Tests submenu, scroll to 29 Media Sensor" and press Enter.
SERVICE TESTS
29 Media sensor
2 If media is not loaded then the Media Absent / Stop..." message is displayed on the
frontĆpanel. Press the Down Arrow button to stop the test.
3 Insert a sheet of A4 media into the entry platen. The Media Present / Stop..." message is
displayed on the frontĆpanel. Press the Down Arrow button to stop the test.
If media was present when the Media Absent / Stop..." message is displayed on the
frontĆpanel, then the test has failed.
If media was not present when the Media Present / Stop..." message is displayed on
the frontĆpanel, then the test has failed.
If the test fails, try
replacing one of the following components:
1 Media sensor ' page 6Ć22.
2 Main PCA ' page 6Ć9.
Only replace one component at a time and perform the “Media Sensor” test again before
replacing another component. Using this procedure you will be able to determine exactly which
component failed.