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Page Title:
Section IV. Performance test and Troubleshooting |
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11-5820-919-40-1
SECTION
IV
PERFORMANCE
TEST
AND
TROUBLESHOOTING
GENERAL .
point where first fault indication
occurred.
If a flowchart is extended to
Performance tests and trouble
another sheet, the continuation symbol
shooting of the radio set units and mod-
is used. Caution and warning notes
ules requires a known good radio set as
appear to alert the user to potential
a test bed. The unit (or module) under
equipment or human hazards.
test (UUT) replaces the known good unit
or module of the test bed radio set, and
TEST AND TROUBLESHOOTING REFER-
is connected to the test bed by fabri-
ENCE DATA.
The performance test flow-
cated test cables.
charts are used in conjunction with the
supporting data below.
PERFORMANCE TEST
AND
depicts the arrangement of maintenance
TROUBLESHOOTING.
information contained in each mainte-
nance chapter.
The performance test flowcharts
3-59.
provide the necessary procedures and
Disassembly and Reassembly Pro-
1.
information to completely test the
cedures. These procedures provide
radio, a unit or a module (unit under
the information necessary to
test). The flowcharts also provide
remove and replace a "Unit Under
troubleshooting procedures as an aid in
Test."
fault isolating to a group of components
if the UUT does not pass a performance
Performance Test Setup Diagrams.
2.
test.
The test setup diagrams show what
test equipment is required for the
USE OF FLOWCHARTS (Figure 3-13).
performance test and troubleshoot-
The performance test procedure path on
ing, and how to connect the test
the flowcharts is indicated by a heavy
equipment to the "Unit Under
The procedure begins at the
flow line.
Test."
bubble symbol that reads "Unit Under
Next, the initial setup block
Test."
Alignment Procedures. The align-
3.
references applicable removal disassem-
ment procedures are performed when
bly and reassembly instructions, a test
specified in the troubleshooting
setup diagram, and provides initial
They are usually
procedures.
switch settings required for the test.
required during troubleshooting to
The initial setup block is followed by a
ensure the "Unit Under Test" is
series of procedural blocks, which
properly aligned before determin-
contain actions required to produce a
ing faulty components.
result, and decision blocks, which asks
whether the desired result occurred. If
Functional Block Diagrams.
4.
The
the desired result has occurred, the
functional block diagrams may be
"yes" pathway is followed; if the
used as an aid to troubleshooting
desired result did not occur, the "no"
in conjunction with the
pathway is followed for the trouble-
flowcharts.
The
performance
shooting
procedure.
test is successfully completed when the
Schematic
Diagram.
5.
The schematics
"Test Passed" bubble symbol is reached.
for the, "Unit Under Test" are used
The troubleshooting procedure is com-
to aid in' identifying suspected
pleted when a fault-indication block is
faulty components. For example,
Once the fault is corrected,
reached .
if the fault block on the trouble-
the performance test is resumed at the
shooting flowcharts calls out
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