GE
P
ART NUMBER FN091065, REVISION 2 VS5 N AND VS6 N SERVICE MANUAL
7-30 Section 7-4 - Performing Front End (FE) Diagnostics
PRELIMINARY
11.)Trackball to the Exit button and press Set to close the View Test Log dialog box.
12.)Press the <Esc> button on the keyboard to close the Diagnostic Test Window.
7-4-2-2 DC Offset Verification
NOTE: For a description of this test, refer to the information provided in • "DC Offset Verification" on page 7-12.
NOTE: When performing this test, no probe should be connected to the system and nothing should be touching
the probe connectors!
1.) In the Diagnostic Test window, trackball to CD Offset Verification in the list of tests available for
selection from the Diagnostic Test Tree (see Figure 7-10 "CD Offset Verification Test" on page 7-
30) and press Set. The CD Offset Verification name is displayed under Execute; the relevant
system components to be tested are highlighted light blue in the Schematic View (PIB, PSB, TR32
and RFI boards), as shown below:
2.) As indicated in the Special Instructions area, disconnect any probes currently connected to the
system and make sure that nothing is touching the probe connectors.
3.) Under the Special Instructions area, activate the Loops checkbox
and select the required number of Loops from the combo box.
4.) Adjacent to On Fail, select either Stop or Continue, as required.
Stopping on failure enables you to review a failed test, the moment
it fails. Alternatively, you may prefer testing to continue on failure and later you may review the
report.
In order to access an individual board test, it is necessary to insert the service dongle from system boot-
up and enter the Service Password.
Figure 7-10 CD Offset Verification Test
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