LG TCH-M550 Service Manual page 28

IC601 PT2313L
LIN1
LIN1 15
LIN2
LIN2
14
LIN3
LIN3
13
Input
Selector
RIN3
& Gain
RIN3 9
RIN2
Control
RIN2
10
RIN1
RIN1
11
Supply
2 3
VDD AGND
LOUT LIN LOUD_L BOUT_L
17 16 12 19
Voume &
Loudness
Serial Bus Decoder & Latches
Voume
&
Loudness
1 7 6 8 21
REF ROUT RIN LOUD BOUT_R
- 2-23 -
BIN_L TREB_L
18
4
RB
Bass Treble
Bass Treble
RB
20 5
BIN_R TREB_R
Speaker
ATT
25 LFOUT
Mute
Speaker
ATT
23 LROUT
Mute
28 CLK
DATA
27
DGND
26
Speaker
ATT
24 RFOUT
Mute
Speaker
ATT
22 RROUT
Mute