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[ AV PWB(COMB FILTER) CIRCUIT DIAGRAM ]
A
B
8
7
6
5
4
3
2
1
A
B
C
COMB FILTER SCHEMATIC DIAGRAM
C758
C765
27P CH
50V
0.47
KA
2.2
BUFFER
Q753
0
2SA1037AK
0
2.3
2.9
2.3
1.2
0
0
1
2
3
4
5
6
7
A.VSS
VRB
VRT
BIAS1
TEST
1H LINE
BPF
MEMORY
CLAMP ADC
BPF
BPF
DYNAMIC
COMB FILTER
COLOR
KILLER
DAC
PLL
SYSTEM CLOCK
DAC
1/2
A.VDD
BIAS2
BIAS3
V.FIL
16
15
14
13
12
11
10
5.1
2.3
1.5
3.9
3.5
2.2
2.3
L753
C793
15uH
0.1 B
C766
22P CH
5.2
BUFFER
4.8
Q751
2SC2412K
4.8
1.6
2.0
1.4
R757
680
NOTE:
THE DC VOLTAGE AT EACH PART WAS MEASURED
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
C
No.51821
AV-20FD22
AV-20FD22
D
E
(AV PCB)
FROM/TO AV SW
49
R762
W858
MONITOR_V
1.6
100
FROM/TO POWER
P.CON+9V
L755
P.CON+A5V
100uH 0305
GND
5.1
8
W831
W863
D.VCC
C785
6.3V
220
YK
D.VSS
9
0
C779
C786
0.1 B
0.01 B
C774
100P CH
FROM/TO
VIF/SIF/CHROMA
5.2
2.6
FSC
50
1.9
C790
W829
W832
COMB_C_OUT
BUFFER
0.1 B
Q754
COMB_Y_OUT
2SC2412K
51
BUFFER
Q752
2SA1037AK
R760
C783
W830
1K1/4W
50V
2.2
KA
D
E
2-31
2-32
F
G
PCB350
TMA503
RECORD COLOR SIGNAL
RECORD LUMINANCE SIGNAL
TUNER VIDEO SIGNAL
PLAYBACK VIDEO SIGNAL
F
G
No.51821
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