Chapter 14 617
Analyzer Messages
Interpreting Analyzer Messages
Before removing the A16 processor/video assembly, check all assemblies
that are identified in Table 14-1.
1. Turn the instrument power off and remove each assembly, one at a
time.
2. Turn the instrument on.
• If the ADC ground fault remains, the instrument preset at
power-up displays the error message.
• If the error message goes away, the last assembly removed is the
cause of the problem.
• If the error message remains after the removal of all related
assemblies, suspect the A16 processor/video assembly.
An ADC ground failure can also be checked manually, using the service
diagnostic. Press CAL, More 1 of 4, More 2 of 4, Service Diag, More 1, GND
REF DETECTOR.
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