Sony KV-28DC20B Service Manual ▷ View online
46
45
C
[ R, G, B DRIVE ]
C BOARD LOCATION
C
[ PRINTED WIRING BOARD ]
143 Vp-p (H)
1
139 Vp-p (H)
WAVEFORMS C BOARD
128 Vp-p (H)
3
2
C
I
1
0
7
C
I
2
-
D
2
0
7
C
I
2
-
A
3
0
7
C
I
1
-
C
R
O
T
S
I
S
N
A
R
T
1
0
7
Q
1
-
C
E
D
O
I
D
1
0
7
D
2
-
B
4
0
7
D
1
-
A
5
0
7
D
1
-
A
7
0
7
D
1
-
A
9
0
7
D
2
-
B
0
1
7
D
2
-
C
1
1
7
D
2
-
D
2
1
7
D
4
-
C
3
1
7
D
1
-
D
4
1
7
D
1
-
D
A
B
C
D
1
2
3
4
D
[ DEFLECTION AND POWER SUPPLY ]
48
47
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
NOTE:
Portions of the circuit marked as shown are high
voltage areas. Use care to prevent electric shock
during inspection or repair.
voltage areas. Use care to prevent electric shock
during inspection or repair.
51 Vp-p (H)
51 Vp-p (V)
1
2.7 Vp-p (H)
2
WAVEFORMS D BOARD
12 Vp-p (H)
3
4
C
I
0
0
6
D
1
-
C
0
0
5
C
I
6
-
I
1
0
6
D
3
-
C
0
0
6
C
I
2
-
D
3
0
6
D
3
-
C
1
0
6
C
I
3
-
C
4
0
6
D
3
-
D
2
0
6
C
I
5
-
F
5
0
6
D
3
-
C
3
0
6
C
I
6
-
C
6
0
6
D
3
-
C
6
0
6
C
I
5
-
C
7
0
6
D
3
-
D
0
0
8
C
I
6
-
H
8
0
6
D
5
-
E
0
0
2
1
C
I
5
-
F
9
0
6
D
5
-
F
1
0
2
1
C
I
5
-
B
1
1
6
D
5
-
C
R
O
T
S
I
S
N
A
R
T
2
1
6
D
5
-
D
1
0
5
Q
6
-
J
3
1
6
D
3
-
E
2
0
5
Q
6
-
I
4
1
6
D
5
-
D
3
0
5
Q
7
-
I
7
1
6
D
5
-
E
1
0
6
Q
2
-
D
8
1
6
D
5
-
G
5
0
6
Q
5
-
E
9
1
6
D
3
-
A
6
0
6
Q
7
-
D
0
2
6
D
4
-
C
7
0
6
Q
4
-
D
2
2
6
D
4
-
C
1
1
6
Q
4
-
B
5
2
6
D
6
-
E
1
0
8
Q
5
-
G
7
3
6
D
4
-
C
2
0
8
Q
1
-
F
8
3
6
D
4
-
C
3
0
8
Q
4
-
G
0
0
8
D
6
-
H
4
0
8
Q
5
-
H
1
0
8
D
6
-
H
5
0
8
Q
5
-
G
2
0
8
D
6
-
H
0
0
9
Q
6
-
A
3
0
8
D
5
-
H
0
0
2
1
Q
6
-
F
7
0
8
D
5
-
G
1
0
2
1
Q
6
-
D
8
0
8
D
3
-
H
2
0
2
1
Q
6
-
B
0
1
8
D
1
-
G
3
0
2
1
Q
5
-
B
1
1
8
D
5
-
G
4
0
2
1
Q
6
-
B
2
1
8
D
2
-
G
E
D
O
I
D
5
1
8
D
3
-
H
0
0
5
D
7
-
H
7
1
8
D
7
-
G
2
0
5
D
4
-
J
2
0
9
D
7
-
B
3
0
5
D
3
-
J
3
0
9
D
7
-
C
4
0
5
D
7
-
I
4
0
9
D
7
-
B
5
0
5
D
7
-
I
5
0
9
D
7
-
B
6
0
5
D
7
-
I
6
0
9
D
7
-
B
7
0
5
D
7
-
I
0
2
9
D
6
-
A
0
1
5
D
5
-
I
1
0
2
1
D
6
-
C
0
7
5
D
5
-
I
2
0
2
1
D
6
-
B
1
7
5
D
6
-
I
D BOARD LOCATION
B
A
C
D
E
F
G
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
H
I
J
K
L
M
N
O
P
Q
R
S
T
21
51
50
49
D
[ DEFLECTION AND POWER SUPPLY ]
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
B
A
C
D
E
19
18
20
21
52
53
54
VM
[ PRINTED WIRING BOARD ]
7.3 Vp-p (H)
WAVEFORMS VM BOARD
1
VM
[ VELOCITY MODULATION AND DYNAMIC CONVERGENCE ]
H
[ PRINTED WIRING BOARD ]
H
[ AV INPUT, SIRCS, FRONT AV, STBY POWER SUPPLY ]
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