Send - Panasonic KX-DT543-B Service Manual

KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B
8.6.2.

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Confirm the voltage between Pin 6 of
Is it about 2.3V?
YES
Confirm the voltage between either end of
C443 (MICBIAS).
Is it about 2.5V?
YES
Confirm the voltage between TP:HSMIP and
TP:UART_GND.
Is it about 2.0V?
YES
Confirm the waveform of sending sound from
handset microphone between TP:HSMIP and
TP:HSMIN during a call.
Can you see the waveform of sending sound?
YES
END
NO
IC150 and AG.
NO
NO
NO
30
Check the soldering.
Resolder or replace parts as needed.
Related parts: IC150,R161,L163,D163,JK160
Related parts: IC410,C442,R238,C443
Related parts: C513,R517,R564,R519,C518,
C570,L463,JK501
Related parts: Handset,Curl cord,JK501,L463,
L464,R520,R517,R518,C513,
C514,R515,R516,IC410