Section II. TROUBLESHOOTING

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.

COMPONENT TESTING:

Paragraph 2-6.

Tests for defective diodes, meters,

controlled

rectifiers.

Use with troubleshooting chart.

Use to isolate defective part.

TESTING, TROUBLESHOOTING CIRCUIT CARD ASSEMBLY:

Paragraph 2-7.

VOLTAGE, RESISTANCE DATA:

Paragraph 2-8.

Voltage output,

resistances

for

transformer,

reactors.

ADJUSTING VOLTAGE CONTROL CIRCUITS:

Paragraph 2-9.

Adjustments after removing and replacing parts.

REMOVING AND REPLACING PARTS:

Paragraph 2-11.

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