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213 Service
CHECK AND
ADJUST RMS
CONVERTER
@
SET RMS
PUSH BUTTON
OUT
CONNECT A DCV
INPUT AND
SET
INPUT
COUPLING
TO DC
NO
NO
CHECK Ql85
CHECK Ql88
CHECK Q206
CHECK Ql56,
Ql58, Ql59,
AND
Ql62
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LEGEND
LOGIC DECISION STEP:
A performance check
that results in a logic decision to determine the
next step in the troubleshooting process.
ACTION STEP:
A step involving setting of con-
trols;
component or part checks;
voltage,
waveform, or resistance checks;
repair;
and
recalibration.
To use this chart, begin at START and perform any instrument
perfor-
mance checks necessary to answer the question in the Logic Decision
Step on the top horizontal flow line of the chart. Whenever
a
negative
logic decision
(No)
is reached, perform each Logic Decision Step
and
Action Step in the sub-flow lines of
the
chart until the original logic
decision (No) is corrected to a positive decision (Yes).
Then continue
through the chart until the END is reached, at which time the instrument
Performance Check should be performed and the instrument calibrated
as
required.
Fig. 9-24 (cont). Troubleshooting chart.
SET RMS
PUSH BUTTON
IN
SET INPUT
COUPLING
TO GNO
CHECK Q204,
U250,
AND
Q256
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