32LH1DC1 - LG TV Service Manual (repair manual). Page 44

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PC(DVI)

Input

I

2

S

I

2

S

IEC958

IC401

DTV Controller

IC602

Audio Processor

IC601

Audio Switch

P602

Phone Jack

Speaker

Stereo(L/R)

IC708

Digital Audio Amp.

P501

SPDIF Output

Connector

P706, P707

Audio Output

Connector

PC audio signal or DVI audio signal is received in P602 to be sent to the audio switch(IC601).
One stereo signal among the signal received by the audio switch(IC601) is selected and sent to the audio
process(IC602).
Selected stereo signal is converted to I

2

S format by audio processor to be sent to DTV controller and outputted in 

I

2

S format through audio decoding process.

This signal is converted to stereo signal(L/R) by digital audio amp(IC708) and sent to the internal speaker through
audio output connector(P706, P707).
Also the digital audio data in IC401 is outputted as PCM data in SPDIF format through P501.