FTA-450L OperATing MAnuAL
62
trouBleshootIng for headset ConneCtIon
Question Answer
When connecting the
SCU-15
headset adapter
cable between the radio and a headset, the “
TX
”
icon appears on the display and the radio cannot
be operated.
This happens when the plug on the
SCU-15
headset adapter cable is not
properly inserted into the
MIC/SP
jack.
To make proper contact within the radio, the plug must be pushed all the way
into the
MIC/SP
jack and be fixed with the two screws.
Can I purchase the optional PTT Switch from
Yaesu?
Contact your Aviation dealer for details regarding purchasing an aftermarket
Push-To-Talk switch.
Will my headset work with this radio? The
SCU-15
headset adapter cable is made to operate with most headsets;
however to be concretely sure check with the headset manufacturer using the
wiring shown below. Please confirm the connections and connector sizes are
correct.
3.5mm plug
SCU-15
Speaker
PJ-055
(accepts 0.25” phone plug)
Microphone
PJ-068
(accepts 0.206” phone plug)
Speaker
PTT
Microphone
Ground
Headset specication requirements for SCU-15
Earphone (speaker) impedance: 8 Ω or above
Microphone impedance: 150 Ω ±20%
PTT pressed: Ground
PTT not pressed: Open
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