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Panasonic KX-T7665NE Service Manual page 21

Digital proprietary telephone
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data
Gain adjustment by IC3
PBX.
Receiving signal is inputted from PBX is
by IC3
inputted to IC4 in PCM data
IC4
pin 27 of IC4
pin 3 and 4 of IC4 to speaker.
11. IC DATA
11.1. IC2
inputted to IC2
pin 28 of IC4
21
then sent to
IC2
Gain adjustment
D/A conversion
pin 29 of IC4
pin 24 of
outputted from

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