TESTING AND TROUBLESHOOTING CIRCUIT CARD ASSEMBLY PC101 (A1)

TM 11-5820-765-34

2 - 7 . TESTING AND TROUBLESHOOTING CIRCUIT CARD ASSEMBLY PC101 (A1)

CAPACITORS CARRY A CHARGE AFTER POWER SUPPLY IS SHUT OFF.

B E F O R E PERFORMING TESTS:

SHUT OFF POWER SUPPLY.

D I S C O N N E C T FROM AC POWER SOURCE.

DISCHARGE CAPACITORS BY SHORTING OUT WITH SHORTING ROD.

General Instructions

Test equipment: Multimeter TS-352B/U

Remove top panel (para 2-10).

Make visual check for overheated components or circuits. If there is visual evidence, check

suspected

circuit

card

component

with

multi

meter.

If there is no evidence of overheating, remove PC101 (A1) from power supply (para 2-11). Make

resistance checks on following page with multi meter.

NOTE

Measure

both

forward

and

reverse

conductivity.

Set

test

meter

select

switch at RX 1000.