Troubleshooting For Headset Connection - Yaesu FTA-750 SPIRIT Operating Manual

t
rouBleshootIng For
Question
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.
Can I purchase the optional PTT Switch from
Yaesu?
Will my headset work with this radio?
3.5mm plug
Microphone
Headset specification requirements for SCU-15
Earphone (speaker) impedance: 8 Ω or above
Microphone impedance: 150 Ω ±20%
PTT pressed: Ground
PTT not pressed: Open
FTA-750/FTA-550 O
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.
Contact your Aviation dealer for details on purchasing an aftermarket Push-To-
Talk switch.
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.
Speaker
PTT
Ground
SCU-15
M
perATing AnuAl
h c
eadset onnectIon
Answer
Speaker
PJ-055
(accepts 0.25" phone plug)
Microphone
PJ-068
(accepts 0.206" phone plug)
87