Panasonic KX-DT543 - Headset Functionality

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KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B
8.7. Headset Does Not Work
8.7.1. Receive
Check the soldering.
Resolder or replace parts as needed.
Related parts: IC410,C577,L462
NO
Confirm the waveform of dial tone at
TP:HESSPOUT when you press the speaker button.
Can you see the waveform of dial tone?
YES
Related parts:
[Ope PCB] JK160
Headset
NO
YES
Can you hear dial tone from headset speaker?
END
Related parts:
[Main PCB] CN400,
[Ope PCB] CN160,C158,C159,C169,C168,
L161,D161
Flat Cable (Between Main PCB and Ope PCB)
NO
Confirm the waveform of dial tone at Pin 5 of JK160
when you press the speaker button.
Can you see the waveform of dial tone?
YES
Insert a headset