FTA-750/FTA-550 OperATing MAnuAl
87
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 simply
inserted into the
MIC/SP
jack.
To make proper contacts within the radio, the plug must be pushed all the way
in 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 on 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 to check with the headset manufacturer providing
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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