GE FQ000040, Руководство по обслуживанию

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GE
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FQ091019, R
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2 V
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N S
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M
ANUAL
Chapter 7 - Diagnostics/Troubleshooting 7-61
7-4-5 Probe and MUX Diagnostic Tests
7-4-5-1 Accessing the Probe and MUX Diagnostic Test Options
• Access the Diagnostic Test window, as described in the Accessing the Front End Diagnostic
Options section, on page 7-25.
7-4-5-2 ACW Test
7-4-5-2-1 ACW IQ Symmetry Test
NOTE: For a description of this test, refer to the information in "ACW IQ Symmetry Test" on page 7-13 .
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 ACW IQ Symmetry Test in the list of ACW tests
available for selection from the Diagnostic Test Tree (see Figure 7-32 below ) and press Set . The
ACW IQ Symmetry Test name is displayed under Execute; the relevant system components to be
tested are highlighted light blue in the Schematic View (P&M), 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.
It is necessary to disable the Loop option where it should not be used.
After performing this test, you must re-boot the system and perform the DC Offset Calibration procedure
as described in
"DC Offset Calibration" on page 7-25 .
Figure 7-35 ACW IQ Symmetry Test