Symphonic WF15L5, Service Manual

Page: 3 / 19

1-2 L3120BLIF
IF/Video Block Diagram
T
O
A
UDIO
BLOCK DIA
GRAM
CN103A
TO LCD BLOCK DIA
GRAM
CN103B
CVBS
11
S-VIDEO-C
7 S-VIDEO-Y
9
INPUT
-0(INV)
INPUT
-1(INV)
SA
W
FIL
TER
TU1
SF11
IF
AG
C
SD
A
SCL
1 7 3 2
SIF
MAIN CB
A
VIDEO SIGNAL
A
UDIO SIGNAL
T
O
A
UDIO BLOCK
DIA
GRAM
JK703 VIDEO1 -IN JK701 S-VIDEO IN
B
UFFER
Q32
SD
A
TO SYSTEM CONTR
OL
BLOCK DIA
GRAM
SCL S-SW
CY
3
IC781
(INPUT SELECT)
5
Q703
4
13 12
Q702
14
1 2
Q701
15
SW CONTR
OL
10
9
11
INPUT
-0
INPUT
-1
T
O
SYSTEM CONTR
OL
BLOCK DIA
GRAM
Q707 Q708
(TUNER UNIT)
B
UFFER
B
UFFER
B
UFFER
WF7
WF8
WF9
CF31
IC31
(IF SIGNAL PR
OCESS)
VIF AMP
VIDEO DET
VCO
4.5MHz FIL
TER
RF AG
C
AMP
SIF AMP
16
13 18
17
4
7
8
1
XT
AL-IN
14
T
O
SYSTEM CONTR
OL
BLOCK DIA
GRAM
AFT
-IN
5
SIF TRAP
11
FSC
IF A
GC DET
AFT
EQ AMP
2
DEFEA
T