TM 55-1510-219-MTF
TROUBLESHOOTING GUIDE K - COMMUNICATION/NAVIGATION
EQUIPMENT
CONDITION
PROBABLE CAUSE
K1.
Interphone system: No audio signals heard in headsets.
a.
No power to audio system.
b.
Defective microphone or microphone switch.
c.
Defective headset-microphone cord or jack.
d.
Defective microphone jack.
e.
Defective audio control panel.
K2.
Interphone system: Audio signals can be heard at other
headset stations when transmitter selector switches at
audio control panels are at different positions.
a.
Defective audio control panel.
b.
Defective wiring.
K3.
UHF VOL control has no effect on receiver noise or
incoming signal.
a.
Defective UHF command set.
K4.
UHF channeling tone not heard.
a.
Defective UHF command set.
K5.
UHF squelch switch has no effect on receiver noise.
a.
Defective UHF command set.
b.
Defective static wicks.
K6.
UHF guard receiver noise not audible.
a.
Defective UHF command set.
K7.
Cannot establish UHF two-way communications.
a.
Defective audio distribution channels.
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