LG 26LH1DC1-UB Service Manual page 39

6. AV1, AV2, AV3 Audio signal flow chart
(S-Video) Input
The left/right audio signal of AV1, AV2 and AV3(S-Video) is received by P703 and CN105, and the AV3 uses the
same audio terminal as S-Video.
One stereo signal among the signals received through the audio switch(IC601) to send to the audio process(IC602).
The Audio switch receives the audio input signal of AV1, AV2, AV3(S-Video) and component1, component2,
PC(DVI) to select and output one stereo signal.
The stereo signal selected this way is converted to I
output I 2 S format through audio decoding process.
This signal is converted to stereo signal (L/R) in the digital audio amp(IC708) to send 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.
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Only for training and service purposes
AV2 Input
AV1, AV3
RCA Jack
Speaker
*Composite(AV1, 2, 3(S-Video)) Audio signal flowchart
P703 CN105
Wafer
IC601
Audio Switch
IC602
Audio Processor
I 2 S
IC401
IEC958
DTV Controller
I 2 S
IC708
Digital Audio Amp.
Stereo(L/R)
P706, P707
Audio Output
Connector
2 S format in the audio processor to send to DTV controller for
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P501
SPDIF Output
Connector
LGE Internal Use Only