Troubleshooting For Headset Connection - Yaesu FTA-450L Operating Manual

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?
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
62
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rouBleshootIng for
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.
Contact your Aviation dealer for details regarding 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 check with the headset manufacturer using the
wiring shown below. Please confirm the connections and connector sizes are
correct.
3.5mm plug
Speaker
PTT
Microphone
Ground
SCU-15
h C
eadset onneCtIon
Answer
Speaker
PJ-055
(accepts 0.25" phone plug)
Microphone
PJ-068
(accepts 0.206" phone plug)
FTA-450L O M
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