TM 1-1510-225-MTF
K2.
h. Headset-oxygen mask switch set in wrong posi-
tion.
Interphone system: Audio signals can be heard at
other headset stations when transmitter selector
switches at audio control panels are at different
positions and receiver monitor switches are pulled
out.
K3.
K4.
K5.
K6.
K7.
a. Defective audio control panel.
b. Defective wiring.
Deleted.
Deleted.
Deleted.
Deleted.
Cannot establish AM/FM (VHF/UHF) two-way
communications.
a. Defective audio distribution channels.
b. Defective antenna or antenna cabling.
c. Defective VHF/UHF transceiver set.
K8.
K9.
Cannot establish VHF two-way communications.
a. Defective audio distribution channels.
b. Defective antenna or cabling.
c. Defective VHF command set.
VHF volume control does not affect received
audio level.
a. Defective VHF control panel.
b. Defective antenna or antenna cabling.
3-26
C1
