TM 11-5820-922-40-1
e. There is no binding, sticking,
2.
Remove all corrosion and fungus
or looseness of moving mechanical parts.
with a cloth and/or brush moistened in
cleaning solvent.
f. All electrical/electronic parts
3.
Repaint all treated areas imme-
are correctly oriented for clearances
diately upon removal of corrosion to
and lead shortness. Printed circuit
alleviate the reoccurrence of corrosion
boards are not under strain due to
build-up.
incorrect mounting.
EXAMINATION.
g. Detection of blackened, over-
GENERAL . Examination of the
heated, broken, or missing electrical/
amplifier-converter includes a visual
electronic components and parts.
inspection, troubleshooting, and a per-
formance test , all of which should be
performed when a fault has occurred or
h. Detection of missing or broken
repair work has been made on an
hardware, loose mountings, and missing
amplifier-converter.
mechanical parts.
Visual Inspection. Visual
inspection of the amplifier-converter
i. No short circuits or grounds are
is separated into two distinct areas:
caused by module case or cover.
completely assembled and unassembled.
1.
Completely Assembled Visual
Troubleshooting Inspection. The
Inspection. This inspection is made to
objective of troubleshooting is to
ensure that all external hardware is
locate the site of a malfunction, after
present and correct.
which repair can be carried out. Thus,
troubleshooting is an inspection process
2.
Unassembled Visual Inspection.
which determines how a malfunctioning
The unassembled visual inspection
item of equipment can be made service-
includes the following:
able. However, in many cases, this proc-
ess may require disassembly, and the
a. Observance of critical posi-
repair may actually be carried out dur-
tioning or adjustment of all mechanical
ing troubleshooting (to prove the cor-
and electrical/electronic parts.
rectness of the troubleshooting diag-
nosis). In this way, troubleshooting
b. All required hardware is used
inspection also identifies the replace-
and correct.
ment time. The flowcharts provided in
the maintenance chapters include per-
c. All required parts are used and
formance tests and troubleshooting
correct.
techniques.
d. All required wiring, soldering,
and sleeving is correct. This includes
Performance Test. A perform-
correct "dressing" arrangement of wire
ance test for the complete amplifier-
harnesses and cables, etc. Detection of
converter and for the individual circuit
frayed, burned, shorted, or broken cables,
cards is included in the appropriate
wiring, and dry-jointed, shorted, or
chapters.
grounded solder connections.
