Chapter 5 REPAIR OF AC-DC CONVERTER

TM 5-6675-250-34

REPAIR OF AC-DC CONVERTER

r e p l a c i n g defective components.

5-1. General

P e r f o r m resistance checks specified in table 5-1 to

Repair of the ac-dc converter at the direct and

isolate

defective

components.

general support maintenance levels consists of

Table 5-1. AC-DC Converter Resistance Check

Points of Measurement

Required Indication

Component

NOTE

Perform resistance checks with an ohmmeter and with power removed from the converter.

Less than 1 ohm

T1-1 to T1-2

Less than 1 ohm

T1-3 to T1-4

Less than 1 ohm

T1-5 to T1-4

10K ohms 10%

E3 to E4

Resistor R1

Approximately 50 ohms with meter

Meter pos lead to diode pos term;

Diode CR1 and CR2

on Xl scale.

meter neg lead to bus bar.

Capacitor C1

(C1 checked in ripple voltage test,

Less than 1 ohm

Filter FL1

T1-1 to T1-3

Less than 1 ohm

T1-2 to T1-5

5-2. Disassembly (fig. 5-1)

a. Removal.

(1) Remove six screws and lift the cover from

the case.

5-1