LG FLATRON 568LM LM568E-CA Service Manual page 29

TDA7449 SGS-THOMOSN TONE CONTROL DIGITALLY CONT. AUDIO PROCESSOR
DIP20
ORDERING NUMBER: TDA7449
BLOCK DIAGRAM
8
L-IN1
100K
9
L-IN2
100K
7
R-IN1
100K
6
R-IN2
100K
MUXOUTL
10
G VOLUME
0/30dB
2dB STEP
G VOLUME
INPUT MULTIPLEXER
+ GAIN
11
MUXOUTR
- 29 -
Pin Configuration
PIN CONNECTION
CREF 1
V
2
S
PGND 3
ROUT 4
LOUT 5
R_IN2 6
7
R_IN1
L_IN1 8
9
L_IN2
MUXOUT(L) 10
D98AU848
TREBLE(L) BIN(L) BOUT(L)
16 15 14
R
B
SPKR ATT
TREBLE BASS
LEFT
2
I CBUS DECODER + LATCHES
SPKR ATT
TREBLE BASS
RIGHT
V
REF
SUPPLY
R
B
17 12 13
TREBLE(R) BIN(R) BOUT(R) CREF
20 SDA
19 SCL
18 DIG_GND
17 TREBLE(R)
16 TREBLE(L)
15
BIN(L)
14 BOUT(L)
13
BOUT(R)
12 BIN(R)
11 MUXOUT(R)
5
LOUT
19
SCL
20
SDA
18
DIG_GND
4
ROUT
2
V
S
3
AGND
1
D98AU847A