7-4
Audio Block Diagram
L3821BLA
MAIN CB
A
A
U
DIO SIGNAL
A
UDIO-MUTE
V
OLUME
T
O
SYSTEM
CONTR
OL BLOCK
T
O
SYSTEM
CONTR
OL BLOCK
INPUT0
INPUT1
SCL
SD
A
IC701
(INPUT SELECT)
SW CTL
13
3
11
15
12
5
2
1
9
10
VCA
STEREO
FIL
TER
75uS
DE-EMPH
dBX
DE-EMPH
L+R
FIL
TER
WIDE BAND
FIL
TER
WIDE BAND
RMS DET
WIDE BAND
EXP
AND
SPECTRAL
EXP
AND
SPECTRAL
RMS DET
SPECTRAL
FIL
TER
OFFSET
CANCEL
L-CH
R-CH
MA
TRIX
AG
C
OFFSET
CANCEL
L-R
FIL
TER
(L-R)/SAP
SW
SAP
FIL
TER
I2C
DECORDER
SAP
DEMOD
SAP OUT
FIL
TER
29
30
TO
IF/VIDEO BLOCK
TUNER
LINE1
LINE2
LINE1
COMP
LINE2
(L-CH)
(R-CH)
21
27
24
IC451
(MTS/SAP A
UDIO SIGNAL PR
OCESS)
A
UDIO(L)-IN1
JK711
SIF
INPUT3
A
UDIO(R)-IN1
JK702
A
UDIO(L)-IN2
JK703
A
UDIO(R)-IN2
OFFSET
CANCEL
COMP-
A
UDIO(L)-IN
JK742
COMP-
A
UDIO(R)-IN
4
TUNER
14
COMP
11
IC801
(A
UDIO AMP)
7
V
OLUME
14
AMP
AMP
MUTE
/ST
ANDBY
CONTR
OL
3
8
(R-CH)
(L-CH)
2
12
Q811
+5V
WF11
SP802
SPEAKER
R-CH
CN802
SP-R
1
SP-GND
2
SP801
SPEAKER
L-CH
CN801
CLN801
CLN802
SP-L
1
SP-GND
2
Q61
B
UFFER
T
O
DTV
BLOCK
DTV
-A
UDIO(R)
DTV
-A
UDIO(L)
1
6
Q352
Q351
WF12
(REAR)
(FR
ONT)
(FR
ONT)
(REAR)
(REAR)
(REAR)
A
UDIO-MUTE
T
O
DTV
BLOCK