TM 55-1510-215-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
*12 Audio control panel (C-10414/ ARC) and interphone system -
Check each unit as follows:
a. Interphone functional check:
(1)
RADIO
MON/NAV switches - As required.
(2) Transmitter - interphone
K1, K2
selector switch (on pilot's and copilot's
audio control panel) - PVT. This
activates hot mike feature. Pilot and
copilot should be able to converse
without
pressing
microphone
switches.
(3) Transmitter - interphone selector
switches (on pilot's and copilot's
audio control panel) - ICS. This will
allow the pilot to talk to the copilot by
pressing a microphone switch and
speaking into microphone or vice-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.
2-45