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TM 11-5820-890-30-5
17-12. EXPLANATION OF SYMBOLS AND NOTES.
SYMBOL
EXPLANATION
Test Procedure Start: (Rectangle with rounded sides)
Indicates start of the test procedure and contains a brief
description of the symptom of trouble.
Test Procedure Flow Line: (Heavy line) Indicates direction
of the procedure flow.
Test Procedure Instruction: (Rectangle) Provides test
setup or instructions for doing a specific test.
Decision: (Diamond) Indicates that a decision must be
made (YES or NO) in answer to question about the
previous test. Path taken depends on the answer
(YES or NO).
Connector: (Circle) Directs user to an entry point of
another chart. Contains an entry number that is the same
as entry number of other chart and a sheet number
(Sh. No.) that indicates the number of follow-on pages,
Notes Column: Presents additional information, such
as: more specific instructions about how to do a test,
cautions and warnings that must be observed when doing
a test, and additional information about what to do after
doing a test. Also provides reference to appropriate
circuit diagrams.
17-13. TROUBLESHOOTING FLOWCHARTS.
The following charts are included:
Chart
Symptom
1
DS1 lamp does not light.
2
ON/OFF switch (CB1) trips.
3
DMM does not read 26 to 29 V dc.
4
No tone is heard over speaker.
5
No RCV audio is at handset
6
400-Hz tone is not heard.
7
3-kHz tone is not heard.
8
Tone is heard over speaker
9
Tone is heard over speaker
10
No MIC audio.
connector.
with PTT applied.
with VOL control pushed in.
17-9
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