TRANSFORMER, RECTIFIER, COMPACTORS, AND HARNESS

TM5-4120-384-14

4 - 3 1 . TRANSFORMER, RECTIFIER, COMPACTORS, AND HARNESS. - Continued

NOTE

When rectifier CR1 is replaced

capacitors

and

should also be replaced.

(3)

Capacitors.

(a)

Disconnect

one

lead

capacitor

from

circuit.

(b) Using an ohmmeter set to read high resistance, place

Place

the positive (+) probe on disconnected capacitor lead.

negative (-) probe of ohmmeter on the other lead of capacitor while

watching ohmmeter needle.

If needle moves quickly to top of the scale and

not at all.

remains there, capacitor contains a short circuit and must be

replaced.

NOTE

The ohmmeter test does not show the behavior of a

Such testing requires special

capacitor under load.

equipment which is not economically practical for

If breakdown under load is

testing small capacitors.

suspected, replace the capacitor.

Replace.

(1)

Transformer.

Tag

and

disconnect wire

leads.

(a)

Remove four

screws and lock washers and pull

(b)

transformer from unit.

Attach

transformer to

unit

with

four

screws

and

lock

washers.

Slip

heat

shrinkable

insulation

tubing

ends

wires

(d)

soldered.

(e) See wiring diagram

figure

4-4

and