GE
P
ART NUMBER FN091065, REVISION 2 VS5 N AND VS6 N SERVICE MANUAL
Chapter 4 - Functional Checks 4-25
PRELIMINARY
4-3-1-8 Front End Tests
Table 4-12 Front End Tests
Step Task Expected Result(s)
1
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.
2Press Alt + Config to enter Diagnostics Mode
3
From the Diagnostic Test tree, select Front End Test,
then proceed to perform the tests described below.
For each test, as the testing sequence progresses, the
progress bar will advance to reflect the test progress.
Status indicators in the Data Flow map corresponding
to the various system components will be highlighted in
the appropriate color to indicate the current test status,
as follows:
Green: All recommended tests for these
components have been completed and no
problems were identified.
Red: Problems were identified in these
components during the performance of the
test.
Yellow: The tests executed so far on these
components have passed, but not all
recommended tests have been performed.
Note: When performing Front End tests, if the system
must be re-booted, do so. Continue testing from the
point at which you were required to reboot. If a failure
occurs, re-boot the system and test again to verify the
outcome of the test
DC OFFSET CALIBRATION TEST
1 Trackball to DC Offset Calibration and press Set.
2
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.
5 Trackball to the Start button and press Set
The test commences.
When the DC Offset Calibration Test sequence is
complete, the View Test Log window opens
automatically, listing the test performed and showing
whether it passed or failed - see the example in Figure
7-9 on page 7-29
6
Use the scroll arrows at the bottom of the Reports
window to scroll through the channels and view the
corresponding results.
7 When done, trackball to the Close button and press Set
DC OFFSET VERIFICATION TEST
1 Trackball to DC Offset Verification and press Set.
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