TM 11-5820-765-34
Section II. TROUBLESHOOTING
2-3.
PROCEDURES
Definition
T r o u b l e s h o o t i n g i s a t w o - s t e p p r o c e s s -- localization and isolation.
Localization means tracing the fault to a defective circuit or assembly.
Isolation means pinpointing the specific part causing trouble.
Procedures
SENSE
the
trouble:
Check meter readings and other visual signs to localize trouble;
Check
for dirt, dust, or moisture;
Smell
for burned-out resistors and other parts;
Listen
for arcing transformer or reactors;
Check
for loose screws and nuts.
You can
localize and isolate trouble this way and reduce repair time.
OPERATE the unit:
An operational test can often help isolate the exact cause of trouble.
USE the CHART:
The troubleshooting chart lists common symptoms, troubles and corrective measures.
Not all trouble symptoms are listed in the chart, so use it as a guide for analyzing symptoms
not listed.
Tests for defective diodes, meters,
controlled
rectifiers.
Use with troubleshooting chart.
Use to isolate defective part.
TESTING, TROUBLESHOOTING CIRCUIT CARD ASSEMBLY:
VOLTAGE, RESISTANCE DATA:
Voltage output,
dc
for
reactors.
ADJUSTING VOLTAGE CONTROL CIRCUITS:
Adjustments after removing and replacing parts.
REMOVING AND REPLACING PARTS:
