LG FFH-185A Service Manual page 30

I LC72131, 72131M
XIN
XOUT
FMIN
AMIN
CE
DI
CL
D0
VDD
VSS
I TDA7440D
4
L-IN1
5
L-IN2
6
L-IN3
7
L-IN4
3
R-IN1
2
R-IN2
1
R-IN3
28
R-IN4
REFERENCE
DIVIDER
1
SWALLOW COUNTER
2
1/16. 1/17 4bits
12bits PROGRAMMABLE
DIVIDER
CCB
DATA SHIFT REGISTER
LATCH
I/F
POWER
ON
RESET
B01 B02 B03
MUXOUTL
8
100K
100K
G
100K
100K
0/30dB
2dB STEP
100K
100K
G
100K
INPUT MULTIPLEXER
+GAIN
100K
10
MUXOUTR INR
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
B04 I01 I02
INL TREBLE(L) BIN(L) BOUT(L)
9 18 14
R
B
VOLUME TREBLE BASS
2
I CBUS DECODER + LATCHES
VOLUME TREBLE BASS
R
B
11 19 12
TREBLE(R) BIN(R) BOUT(R) CREF
- 2-34 -
PD
AIN
AOUT
IFIN
15
27
SPKR ATT
LOUT
LEFT
21
SCL
22
SDA
20
DIG_GND
26
SPKR ATT
ROUT
RIGHT
V
REF
24
V
S
SUPPLY 25
AGND
13 23
D98AU883