Audio Path - Rx Audio (See Fig. 25) - Panasonic KX-TCD725RUM Service Manual

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7.1.7 AUDIO PATH - RX AUDIO (SEE Fig. 25)

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Audio from the receiver RXDA enters the BBIC on pin 10 as GAP standard DECT frames. It passes
through the decoding section burst mode controller where it separates out the frame information and
performs de-encryption and de-scrambling as required.It then goes to the DSP where it is turned back
into analogue audio. This is amplified by the analogue front end and emerges at pin 40 and 41. The
telephone speaker is driven directly from the BBIC output ports.
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm. When the handset is not
in hands-free mode the HF_AM1 amplifier is deactivated by the SP_CTR control signal at pin 93 from
the BBIC.
The earpiece speaker LS1 is driven directly from the HON and HOP output lines, pins 40 and 41,
without any amplification.
A 2.5mm jack J6 is provided for connecting a headset.
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http://202.224.189.179/view_new/OT/KX-TCD725RUM/SVC/s0701070000.html13.10.2007 10:17:04