GE Vivid i n Service Manual page 380

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DC Offset Verification

For a description of this test, refer to the information provided in

IMPORTANT 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.

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 DC Offset Verification in the list of tests available for

selection from the Diagnostic Test Tree (see

Verification name is displayed under Execute; the relevant system components to be tested are

highlighted light blue in the Schematic View (PM, 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.

5.) Trackball to the Start button and press Set.

The DC Offset Verification Test commences. While the test proceeds, the name of the test currently

in progress (DC Offset Verification) is displayed in the Execute field and the current Loop # and

specific test are shown below. The messages Init Done and Please Wait are displayed beside the

progress bar in the Status area.

Figure 7-9 DC Offset Verification Test

Section 7-4 - Performing Front End (FE) Diagnostics

IVID I N AND

DC Offset Verification on page 7 -

below) and press Set. The DC Offset