FUNAI LCD-A2006 - Page 21

7-3
Audio Block Diagram
L4620BLA
MAIN CBA
AUDIO SIGNAL
VOLUME
TO SYSTEM CONTROL BLOCK
INPUT-0(INV) INPUT-1(INV)
SCL
SDA
IC871 (INPUT SELECT)
SW CTL
13
4 2 1
11 12
9 10
dBX/MNR PANDA1
FM/AM PRESCALE
I2C READ REGISTER
AUTOMATIC SOUND SELECT
NICAM PRESCALE
L-CH R-CH
AGC
DEMODULATOR
A/D CONVERTER
I2C DECORDER
TO IF/VIDEO BLOCK DIAGRAM
TUNER
AUDIO1
AUDIO2
TUNER AUDIO1 AUDIO2
(L-CH) (R-CH)
2
12 13
IC831 (SOUND PROCESSOR)
AUDIO1(L) -IN JK723
SIF
JK724 AUDIO1(R) -IN
14
IC801 (AUDIO AMP)
7
VOLUME
11
AMP AMP
MUTE /STANDBY CONTROL
6 1
(R-CH) (L-CH)
2
JK801 HEADPHONE JACK
CN801
SP-R 1
GND 2
TO IF/VIDEO BLOCK DIAGRAM
3
15
WF1
CLN801
SP801 SPEAKER R-CH
TO SYSTEM CONTROL BLOCK DIAGRAM
NICAM-RESET
43 22
AUDIO
RESET
6
INH
JK751
1
3
AUDIO2(L) -OUT AUDIO2(R) -OUT
6
AUDIO2(L) -IN
2
AUDIO2(R) -IN
Q732
Q733
Q741
Q742
INSEL-MUTE
S/C-JACK-MUTE SP-MUTE
DEEMPHASIS
SOUND SELECT
D/A CONVERTER
VOLUME
SCART1 OUTPUT SELECT
SCART1 CHANNEL MATRIX
30 31
STANDERD AND SOUND DETECTION
BUFFER
BUFFER
SP802 SPEAKER L-CH
CN310
CN304
CN404
CLN310
SP-L 1
GND 2
INVERTER CBA
SP-L22
GND11