Section III. TROUBLESHOOTING TEST SET, RADIO TS-1962/ARC-51X

TM 11-6625-564-45

Figure 2-22. Radio set simulator, transient blanker 1A4, wiring diagram.

Section III. TROUBLESHOOTING TEST SET,

RADIO T S - 1 9 6 2 / A R C - 5 1 X

a. Disconnect all cables from the test unit.

2-7. Resistance and Continuity

Measurements

b. Remove the dust cover from the test unit.

Make the resistance and continuity meas-

c. Set the switch, or switches, shown in the

urements indicated below. If results other

Switch column of the chart (c below) to the

than those indicated are obtained, isolate the

position shown in the Position column. Con-

faulty part by resistance measurements before

nect the dc voltmeter between the terminals in

making tests or applying power.

the Terminals column. Refer to figure 4-

Cautions :

10, test unit schematic diagram, and figure 4-

1. This equipment is partially transistor-

15, test unit wiring diagram, and to the figures

ized. Observe all precautions to prevent trans-

referenced in the Figure column for terminal

istor damage. Make resistance measurements

and component location. All resistance read-

in the test unit only as specified.

ings should be within 10 percent of those

2. Do not attempt removal or replacement

shown in the Resistance column. These meas-

of parts before reading the instructions given

urements are to be made before applying

in paragraph 3-1.

power to the unit to insure complete chassis

Note: Unless otherwise indicated, references to test

wiring continuity and to localize the trouble

points, jacks, connectors, and switches apply to the

test unit.

before detailed troubleshooting is performed.