TROUBLESHOOTlNG GUIDE K - COMMUNICATION/NAVIGATION EQUIPMENT

TM 55-1510-218-MTF

TROUBLESHOOTlNG GUIDE K - COMMUNICA-

TION/NAVIGATION EQUIPMENT

Interphone system: No audio signals heard in

K1.

headsets.

a. No power to audio system.

b. Defective microphone, control wheel micro-

phone switch, or foot microphone switch.

c. Defective headset-microphone cord or jack.

d. Defective microphone jack.

e. Defective audio control panel.

Interphone system: Audio signals can be heard

K2.

at other headset stations when transmitter selec-

to switches at audio control panel are at differ-

ent positions.

a. Defective audio control panel.

b. Defective wiring.

UHF VOL control has no effect on receiver

K3.

noise or incoming signal.

a. Defective UHF command set.

UHF channeling tone not heard.

K4.

a. Defective UHF command set.

K5.

UHF squelch switch has no effect on receiver

noise.

a. Defective UHF command set.

b. Defective static wicks.

UHF guard receiver noise not audible.

K6.

a. Defective UHF command set.

Cannot establish UHF two-way communications.

K7.

a. Defective audio distribution channels.

b. Defective antenna or antenna cabling.

Cannot establish VHF two-way communications.

K8.

a. Defective audio distribution channels.

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