Agilent Technologies 89410A Service Manual page 71

3
Step 3. Run the functional tests in loop mode.
a
Set the power switch to on ( l ).
b When the power-up tests are completed, press the following keys:
]
[
System Utility
[auto cal
]
off
]
[ more cal setup
[
]
auto zero cal off
]
[
Return
[more]
[ ]
diagnostics
[
service functions
1125
[ ]
enter
[ ]
test log
[ ]
clear test log
]
[ Return
[ ]
loop mode setup
[ ]
until failure
[ ]
Return
[ ]
functional tests
[ ]
ALL
The analyzer runs the functional tests until a failure occurs, then
writes the failure message in the test log and stops.
c If a failure message occurs, go to ''To perform self tests'' on page
page 1-32 to compare the error message to the ''Self-Test
Troubleshooting Guide.''
4
Determine the probable faulty assembly or next test by comparing the
fault log entries to the following table.
a Press the following keys:
]
[
Preset
[ Return ]
]
[ fault log
Pressing [
Preset
self test to abort. This should not be counted as a failure.
b
Compare the fault log entries to the following table.
The order that the messages are listed in the table is not
significant. If fault log messages match more than one entry in
the table, all assemblies listed for each message should be
suspected and the assembly common to each fault log message is
most likely the faulty assembly. Assemblies are listed in order of
probable failure when more than one assembly can cause the
]
] while a functional test is running will cause the
Troubleshooting the Analyzer
To troubleshoot intermittent failures
1-53