Read Panasonic KX-TCA175RU Service Manual online
11
KX-TCA175RU
4.2.6.
RX Audio Path
Receiver
Burst data is input from RF Module to pin 26 (RXDA) of IC3.
In IC3, the burst data is converted to ADPCM, then to analog signal, and sent from pin 110 (LSR+) and pin 111 (LSR-) to the
receiver.
In IC3, the burst data is converted to ADPCM, then to analog signal, and sent from pin 110 (LSR+) and pin 111 (LSR-) to the
receiver.
Headset
When the headset is inserted, a signal to the receiver is cut off and audio signal from pin 110 (LSR+) of IC3 is input to the
headset.
headset.
Speakerphone
In Speakerphone mode, the BBIC (IC3) makes pin 1 of IC5 from Low to High.
And an audio signal from pin 112 (LSR_HS) of IC3 is sent to a monitor speaker through speaker Amplifier IC (IC605).
And an audio signal from pin 112 (LSR_HS) of IC3 is sent to a monitor speaker through speaker Amplifier IC (IC605).
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