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Troubleshooting the Analyzer
To troubleshoot two channel analyzer failures
isolate the failure symptom. Once the exact failure symptom is
known, do the following steps but substitute the failure symptom for
the self tests.
2 Exchange the assemblies in channel 1 with the assemblies in channel
2, then check for failing tests.
a Set the power switch to off ( O ).
b Remove the top cover.
c Exchange the A21 A/D Converter assembly and A10 Analog Input
assembly in channel 1 with the A21 A/D Converter assembly and
A10 Analog Input assembly in channel 2.
d Reconnect the cables as follows:
Channel 1: A10 J2 to A21 J4
A10 J3 to A36 J2
A21 J1 to A60 J3
Channel 2: A10 J2 to A21 J4
A10 J3 to A36 J5
A21 J1 to A60 J2
e Set the power switch to on ( l ).
f 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]
[
Return]
[
functional tests]
[
ADC]
(wait for test to finish)
[
more]
[
input]
(wait for test to finish)
[
calibration]
g If the channel that failed before the exchange still fails, go to Step
4.
The noise floor may appear higher than usual even if a channel is
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