REPAIR OR REPLACEMENT.

TM 11-5820-670-12

3-12.

OPERATIONAL CHECK. (CONT)

ACTION

RESULT

TEST METER should indicate 50 10 on scale

Set mode control switch on

control unit to T/R, set

indicating 10 watts foward power. If not, see

TEST SWITCH to position 4,

troubleshooting (para 3-9) item 4.

depress XMTR TEST push-

button, and observe TEST

METER.

Set TEST SWITCH to position

TEST METER should not indicate more than 25. An in-

5, depress XMTR TEST push-

dication greater than 25 indicates high reflected

button, and observe TEST

power. If this is the case, see troubleshooting

METER.

(para 3-9) items 4 and 15.

TEST METER should indicate 0, position 6 disconnects

Set TEST SWITCH to position

6 and observe TEST METER.

meter from all circuits. If any indication on TEST

METER, see troubleshooting (para 3-9) item 4.

All frequencies shall be squelch disabled. If not,

Set SQUELCH mode selector

switch to DIS.

see troubleshooting (para 3-9) item 10.

Perform two-way voice com-

Trouble-free two-way voice communication should be

made. If there are any discrepancies, see trouble-

munications in accordance

with paragraph 2-4.

shooting (para 3-9) items 5 through 15.

Perform retransmission in

m . Trouble-free retransmission should be made. if radio

accordance with paragraph

set does not operate, see troubleshooting (para 3-9)

2-4. (Can only be performed

item 16. If radio set oscillates, see troubleshooting

if two radio sets have been

(para 3-9) item 17.

set up as a relay station.)

Perform homing in accordance

Aircraft homing indicator should indicate aircraft

with paragraph 2-4.

heading in relationship with homing signal transmitter.

If radio set does not home, see troubleshooting (para

3-9) item 18.

3-13.

REPAIR OR REPLACEMENT.

Repair of the radio set, at organizational maintenance, is limited to replacement of faulty components

or piece parts as follows: Receiver-Transmitter RT/ARC-131, Radio Set Control C-7088/ARC-131,

control unit knobs, control unit dial mask, Mounting MT-3664/ARC-131, and connector plate.

Resources required are not listed unless they apply to the procedure. Tool Kit, Electronic Equipment

TK-101/G is needed for all procedures, and tools will not be listed unless they are not contained in the

kit. Personnel are listed only if the task requires more than one technician. If Personnel Required is

not listed, one technician can do the task. The normal standard equipment condition to start a

maintenance task is power off. Equipment Condition is not listed unless some other condition is

required.

3-25