Symphonic WF15L5, Service Manual

Page: 4 / 19

1-3
Audio Block Diagram
L3120BLA
MAIN CB
A
A
U
DIO SIGNAL
A
UDIO-MUTE
V
O
LUME
T
O
SYSTEM
CONTR
OL BLOCK
INPUT
-0(INV)
INPUT
-1(INV)
SCL SD
A
IC852
(INPUT SELECT)
SW CTL
3
11 15 12
4 1
9
10
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 DIA
GRAM
TUNER
TUNER
(L-CH) (R-CH)
21 27 24
IC851
(MTS/SAP A
UDIO SIGNAL PR
OCESS)
A
UDIO1(L)
-IN JK704
SIF
JK705 A
UDIO1(R)
-IN
OFFSET CANCEL
14
IC801
(A
UDIO AMP)
7
V
O
LUME
11
AMP AMP
MUTE /ST
ANDBY
CONTR
OL
6 1
(R-CH) (L-CH)
2
Q802
Q803
5
RF
JK801 HEADPHONE JA
C
K SP801 SPEAKER R-CH
CN801
SP-R
1
GND
2
SP802 SPEAKER L-CH
CN802
CLN802 CLN801
SP-L
1
GND
2
+5V
T
O
IF/VIDEO
BLOCK DIA
GRAM
13
2
WF6
A
UDIO1
A
UDIO1 SIF/BB SW
INPUT VCA
SIF DEMOD
14
5
P-ON-H
14