Send - Panasonic KX-DT543-B Service Manual

KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B
8.7.2.

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Insert a headset
Confirm the voltage between either end of
C443 (MICBIAS).
Is it about 2.5V?
YES
Confirm the voltage between TP:HESMIN and
TP:UART_GND.
Is it about 2.4V?
YES
Confirm the waveform of sending sound from
heaset microphone between TP:HESMIN and
TP:UART_GND during a call.
Can you see the waveform of sending sound?
YES
END
Check the soldering.
Resolder or replace parts as needed.
NO
Related parts: IC410,C442,R238,C443
Related parts:
NO
[Main PCB] CN400,L461,C576,R566,R569,
[Ope PCB]
Flat Cable (Between Main PCB and Ope PCB)
NO
Related parts:
[Main PCB] R570,C581,IC410
Headset
32
C571,C580
CN160,C166,L160,D162,C165