Sylvania SRT2232S Service Manual page 24

Audio Block Diagram
FROM IF/VIDEO
INPUTSELECT
TU-AUDIO
BLOCK DIAGRAM
MAIN CBA
JK702
A-IN-L
(REAL)
JK703
A-IN-R
(REAL)
JK722
A-IN-L
(FRONT)
JK723
A-IN-R
(FRONT)
JK702
A-OUT-L
JK703
A-OUT-R
Q791 Q792
IC431 MTS/SAP AUDIO SIGNAL PROCESS
STEREO L+R
21 VCA
FILTER DEMOD
L-R
DEMOD
SAP SAP
FILTER DEMOD
24
I2C BUS
CONTROL
27
IC771 INPUT SELECT
TUNER
12
REAR
11 13
FRONT
14
(L-CH)
(R-CH)
TUNER
1
REAR
4 3
FRONT
5
SW CTL
9 10
Q761
AMP
Q751
AMP
Q794
Q793
+8V
6-5
L+R 75uS
FILTER DE-EMPH
L-R
FILTER
fH, 2fH WIDE BAND
(L-R)/SAP
TRAP FILTER FILTER
SW
SAP
FILTER
dBX
DE-EMPH
SPECTRAL
FILTER
IC801 AUDIO AMP
WF6
DC
5
VOL.
MUTE CTL
DC
2
VOL.
6 8
MATRIX
WIDE BAND WIDE BAND OFF SET
RMS DET EXPAND CANCEL
SPECTRAL
EXPAND
TP421
SPECTRAL
R-OUT
RMS DET
CN801
7
SP-L 2
SP-GND 1
CN802
12 SP-R 2
SP-GND 1
VOLUME
A-MUTE-H FROM VIDEO/SYSTEM
CONTROL
INPUT 0
BLOCK DIAGRAM
INPUT 1
SCL
SDA
6-6
AUDIO SIGNAL
L-CH
30
MATRIX
R-CH
29
TP422
L-OUT
SP801
SPEAKER
L-CH
SP802
SPEAKER
R-CH
L6250BLA