7-2
L0171BLIF
IF/Video Block Diagram
CF31
T
O
A
UDIO
BLOCK DIA
GRAM
CN103A
TO
LCD BLOCK
DIA
GRAM
CN113B
CVBS
11
S-VIDEO-C
7
S-VIDEO-Y
9
IC11
(IF SIGNAL PR
OCESS)
INPUT
-0(INV)
INPUT
-1(INV)
SA
W
FIL
TER
VIF
AMP
VIDEO
DET
4.5MHz
FIL
TER
RF
AG
C
LPF
4.5MHz
TRAP
16
17
4
TU1
SF11
IF
AG
C
SD
A
SCL
1
11
5
4
14
SIF
MAIN CB
A
VIDEO SIGNAL
A
UDIO SIGNAL
T
O
A
UDIO BLOCK
DIA
GRAM
JK722
VIDEO1
IN
IF
A
G
C
DET
EQ
AMP
SIF
AMP
2
1
7
8
B
UFFER
Q709
SD
A
TO
SYSTEM
CONTR
OL
BLOCK
DIA
GRAM
SCL
S-SW
CY
CN103A
TO
LCD BLOCK
DIA
GRAM
CN113B
VIDEO-Y
5
VIDEO-Pb
3
VIDEO-Pr
1
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
Q704
Q705
Q706
(TUNER UNIT)
B
UFFER
B
UFFER
B
UFFER
B
UFFER
B
UFFER
B
UFFER
SWITCHING
Q31
CF32
6
VCO
APC
WF7
WF8
WF9
JK721
S-VIDEO
IN
JK726
VIDEO-Y
IN
JK727
VIDEO-Pb
IN
JK728
VIDEO-Pr
IN
WF 6
WF5
WF4
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.