TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
on appropriate 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)
Pull each receiver switch (on audio
control panel) out to the off position
and each receiver volume control
fully counterclockwise.
(4)
Transmitter selector switches (pilot's
and copilot's audio control panels) -
INTPH.
(5)
Audio control panel volume control
(pilot’s) - Turn fully clockwise.
Listen for excessive noise.
(6)
Repeat for other audio control panel.
c.
Receiver/transmitter selectors - Check as
follows:
(1)
Transmit and receive on each radio
using all microphone switches one
at a time.
(2)
Repeat entire procedure for each
audio control panel.
4-23
