Samsung DVD-R129XAA, Service Manual

Page: 127 / 208

Circuit Operating Descriptions
Samsung Electronics 13-13
13-6 Audio
13-6-1 Input Block
This Model has two stereo line input terminals. and internal TV-audio from RF Tuner Block.
These three Analog audio signal source are converted to digital data by Input Block.
Input Block has a Multiplexer (IC203), A/D converter (AIC2).
IC203 change it’s output by selection control signal from IC601 (Front Micom).
13-6-2 Output Block
DVD-R129 has two stereo analog line out terminal, and two digital output terminal.
Decoded signal by DIC1 is inputted to AIC1 (D/A Converter), then filtered and amplified by AIC4 (OP-Amp).
And the digital audio signal (IEC-958) is outputted in Optical/Coaxial (S/PDIF) terminal.
AV IN1
(Rear)
L1-in
R1-in
L2-in
L2-in
AV IN2
(Front)
TV Audio
(from tuner
block)
RF-R
RF-L
IC203
BU4052
Multiplexer
IC601
(micro controller)
AU5
PCM1803
(Audio A/D
Coverter)
SCKI
BCK
LRCK
DOUT
AV OUT
(Rear)
Optical
Out
Coaxial
Out
AIC4
4560 OP-AMP
AU2
PCM1742KE
(Audio D/A
Coverter)
L-out
R-out
SCKI
BCK
LRCK
DOUT
ML
MC
MD
DIC1
S5L3200
A/V Processor
(Dolby AC-3
Encoder/Decoder)
IEC958 DATA
Fig. 13-9