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 TM 55-1510-218-MTF
TROUBLESHOOTING
PROCEDURE
REFERENCE
visa-versa from copilot's
position.
(3) Microphone switches -
Actuate one at a time and
speak into appropriate
microphone. Side tone
should be heard and
speech should be heard in
other headset.
(4) Volume control - Check
for function.
b. Receiver and transmitter fa-
cilities - Check as follows:
(1) Receiver volume controls
- Turn all fully counter-
clockwise.
(2) Receiver switches (audio
control panel) - Turn on
(up) one at a time and in-
crease volume of appro-
priate receiver, listening
for either radio reception
or background noise.
(a) Cycle - propeller deice
switch from Off to
AUTO and return to
OFF.
(b) Cycle electric standby
fuel pumps.
(3) Return each receiver
switch (on audio control
panel) to the off (down)
position and each receiver
control
fully
volume
counterclockwise.
4-15
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