TM 55-1510-215-MTF
K6. UHF Guard receiver noise not audible.
a.
Defective UHF command set.
K7. Cannot establish UHF two-way communications.
a.
Defective audio distribution channels.
b.
Defective antenna or antenna cabling.
c.
Defective UHF command set.
KS. Cannot establish VHF two-way communications.
a.
Defective audio distribution channels.
b.
Defective antenna or antenna cabling.
c.
Defective VHF control panel.
d.
Defective VHF receiver-transmitter.
K9. VHF VOL control does not affect received audio level.
a. Defective VHF control panel.
b. Defective VHF receiver-transmitter.
K10. HF transmitted or received signal or sidetone not clear (CLR
VC mode).
a.
Defective HF.
b.
Defective antenna or cabling.
c.
Defective HF control panel.
d.
Defective audio control panel.
e.
Defective HF/VOW switch.
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