TM 1-1510-224-MTF
K6.
UHF guard receiver noise not audible.
Defective UHF command set.
K7.
Cannot establish UFH two-way communications.
a. Defective audio distribution channels.
b. Defective antenna or antenna cabling.
c. Defective UHF command set.
K8.
Cannot establish VHF two-way communications.
a. Defective audio distribution channels.
b. Defective antenna or cabling.
c. Defective VHF command set.
K9.
VHF volume control does not affect received audio level.
a. Defective VHF control panel.
b. Defective antenna or antenna cabling.
K10.
HF transmitted or received signal or sidetone not clear.
a. Defective HF receiver-transmitter.
b. Defective antenna cabling.
c. Defective HF control panel.
d. Defective audio control panel.
K11.
No VOR audio tone heard in headset.
a.
Defective VOR receiver.
b.
Defective VOR control panel.
c.
Defective audio control panel.
K12.
VOR receiver inoperative.
a. No power to equipment.
b. Defective VOR control panel.
c. Defective VOR receiver.
K13.
Marker beacon signals not heard in headset.
a. Defective audio control panel.
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