Sharp LC-20AV7U Service Manual - Page 29

IF/Video Block Diagram

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A7144BLIF 8-2 NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. TU61 (TUNER UNIT) IF 7 SF11 SAW FILTER IC31 (IF SIGNAL PROCESS) 16 VIF 17 AMP VIDEO DET CF31 4 4.5MHz FILTER 7 TO SYSTEM CONTROL BLOCK DIAGRAM FSC S-SW IF-MUTE RF AGC 11 AMP VCO IF AGC DET AFT SIF TRAP EQ AMP DEFEAT 2 1 SIF AMP 8 18 13 JK703 VIDEO -IN1 JK701 S-VIDEO IN CY JK706 VIDEO-Y IN JK707 VIDEO-Pb IN JK708 VIDEO-Pr IN TO SYSTEM CONTROL BLOCK DIAGRAM INPUT-0 INPUT-1 INPUT-2 Q707 Q708 Q709 VIDEO SIGNAL AUDIO SIGNAL MAIN CBA SIF TO AUDIO BLOCK DIAGRAM AFT-IN TO SYSTEM CONTROL BLOCK DIAGRAM RF-CVBS S-VIDEO-C TO LCD BLOCK DIAGRAM S-VIDEO-Y INPUT-0(INV) INPUT-1(INV) INPUT-2(INV) TO AUDIO BLOCK DIAGRAM VIDEO-Y VIDEO-Pb VIDEO-Pr VIDEO-IN1 TO LCD BLOCK DIAGRAM IF/Video Block Diagram

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8-2
A7144BLIF
IF/Video Block Diagram
TO AUDIO
BLOCK DIAGRAM
TO
LCD BLOCK
DIAGRAM
TO
LCD BLOCK
DIAGRAM
INPUT-0(INV)
INPUT-1(INV)
SAW
FILTER
TU61
SF11
IF
7
SIF
MAIN CBA
TO AUDIO
BLOCK
DIAGRAM
JK706
VIDEO-Y
IN
JK707
VIDEO-Pb
IN
JK708
VIDEO-Pr
IN
JK703
VIDEO
-IN1
JK701
S-VIDEO
IN
TO
SYSTEM
CONTROL
BLOCK
DIAGRAM
S-SW
IF-MUTE
C
Y
INPUT-0
INPUT-1
INPUT-2
TO SYSTEM CONTROL
BLOCK DIAGRAM
Q707
Q708
INPUT-2(INV)
Q709
(TUNER UNIT)
CF31
IC31
(IF SIGNAL PROCESS)
VIF
AMP
VIDEO
DET
VCO
4.5MHz
FILTER
RF
AGC
AMP
SIF
AMP
16
13
18
17
4
7
8
1
TO SYSTEM CONTROL
BLOCK DIAGRAM
AFT-IN
SIF
TRAP
11
FSC
IF AGC DET
AFT
EQ
AMP
2
DEFEAT
RF-CVBS
S-VIDEO-C
S-VIDEO-Y
VIDEO-Y
VIDEO-Pb
VIDEO-Pr
VIDEO-IN1
VIDEO SIGNAL
AUDIO SIGNAL
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.