Sylvania 6620LCT A - Page 22

7-3
Audio Block Diagram
L3219BLA
MAIN CBA
AUDIO SIGNAL
AUDIO-MUTE
VOLUME
TO SYSTEM CONTROL BLOCK DIAGRAM
INPUT-0(INV) INPUT-1(INV)
SCL SDA
IC852 (INPUT SELECT)
SW CTL
3
11 15 12
4 1
9 10
STEREO FILTER
75uS DE-EMPH
dBX DE-EMPH
L+R FILTER
WIDE BAND FILTER
WIDE BAND RMS DET
WIDE BAND EXPAND
SPECTRAL EXPAND SPECTRAL RMS DET
SPECTRAL FILTER
OFFSET CANCEL
L-CH R-CH
MATRIX AGC
OFFSET CANCEL
L-R FILTER
(L-R)/SAP SW
SAP FILTER
I2C DECORDER
SAP DEMOD
SAP OUT FILTER
29 30
TO IF/VIDEO BLOCK DIAGRAM
TUNER
TUNER
(L-CH) (R-CH)
21 27 24
IC851 (MTS/SAP AUDIO SIGNAL PROCESS)
AUDIO1(L) -IN JK704
SIF
JK705 AUDIO1(R) -IN JK709 AUDIO2(L) -IN JK710 AUDIO2(R) -IN
OFFSET CANCEL
14
IC801 (AUDIO AMP)
7
VOLUME
11
AMP AMP
MUTE /STANDBY CONTROL
6 1
(R-CH) (L-CH)
2
Q802
Q803
JK801 HEADPHONE JACK
SP801 SPEAKER R-CH
CN801
SP-R 1
GND 2
SP802 SPEAKER L-CH
CN802
CLN802 CLN801
SP-L 1
GND 2
+5V
TO IF/VIDEO BLOCK DIAGRAM
13
2
WF6
AUDIO1
AUDIO2
AUDIO1 AUDIO2
SIF/BB SW
INPUT VCA
SIF DEMOD
P-ON-H