TM 55-1510-219-MTF
PROCEDURE TROUBLESHOOTING REFERENCE
F.
AVIONICS FLIGHT CHECKS (CONT)
(2)
ICS switch - NORM.
(3)
Transmitter selector switches on pilot's and copilot's
audio control panel - INTPH. This will allow the pilot to
talk to the copilot by pressing a microphone switch and
speaking into microphone or visa-versa from copilot's
position.
(4)
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.
(5)
ICS switch - HOT MIC. Crew should be able to
converse on intercom without depressing microphone
switches.
(6)
Volume control - Check for function.
b.
Receiver and transmitter facilities - Check as follows:
(1)
Receiver
volume
controls
-
Turn
all
fully
counterclockwise.
(2)
Receiver switches (audio control panel) - Push on one
at a time and turn clockwise to increase volume and
increase volume
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