Emerson 20" Color Television 6420FE - Manual (Page 24)

6-3
Audio Block Diagram
L2401BLA
MAIN CB
A
A
UDIO SIGNAL
A-MUTE V
OLUME
TO SYSTEM CONTR
OL
BLOCK
INPUT 0 INPUT 1 SCL SD
A
IC771
(INPUT SELECT)
SW CTL
11 15 12 4 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 REAR FR
ONT
TUNER REAR FR
ONT
(L-CH) (R-CH)
21 27 24
IC431
(MTS/SAP A
UDIO SIGNAL PR
OCESS)
A
UDIO-IN(L)
(REAR) JK711
SIF
JK711 A
UDIO-IN(R)
(REAR) JK702 A
UDIO-IN(L)
(FR
ONT)
JK703 A
UDIO-IN(R)
(FR
ONT)
OFFSET CANCEL
JK801 HEADPHONE JA
C
K SP802 SPEAKER R-CH
CN802
SP-R
1
SP-GND
2
SP801 SPEAKER L-CH
CN801
CLN801 CLN802
SP-L
1
SP-GND
2
11
IC801
(A
UDIO AMP)
7
V
OLUME
14
AMP AMP
MUTE /ST
ANDBY
CONTR
OL
3 8
2
Q811
RF
Q801
5 RF
TO PO
WER
SUPPL
Y
BLOCK
WF6
3 13
(L-CH) (R-CH)