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OPERATIONAL CHECK-continued
Up
TM-11-5820-670-12 Radio Set AN/ARC-131(NSN
Next
RECEIVER-TRANSMITTER RT-823/ARC-131 REPLACEMENT.


TM 11-5820-670-12
3-12.
OPERATIONAL CHECK. (CONT)
ACTION
RESULT
h.
TEST METER should indicate 50 10 on scale
h.
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
i.
TEST METER should not indicate more than 25. An in-
i.
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
j.
j.
6 and observe TEST METER.
meter from all circuits. If any indication on TEST
METER, see troubleshooting (para 3-9) item 4.
k.
All frequencies shall be squelch disabled. If not,
Set SQUELCH mode selector
k.
switch to DIS.
see troubleshooting (para 3-9) item 10.
Perform two-way voice com-
I.
Trouble-free two-way voice communication should be
I.
made. If there are any discrepancies, see trouble-
munications in accordance
shooting (para 3-9) items 5 through 15.
Perform retransmission in
m . Trouble-free retransmission should be made. if radio
m
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
n.
n.
Aircraft homing indicator should indicate aircraft
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


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