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AV-21U4
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JVC AV-21U4 Service Manual page 35
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Instructions manual
(16 pages)
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VOLTAGE CHARTS
<MAIN PWB>
<CRT SOCKET PWB>
MODE
MODE
MODE
MODE
DC (V)
DC (V)
DC (V)
DC (V)
PIN NO.
PIN NO.
PIN NO.
PIN NO.
IC401
79
1.3
5
3.0
IC351
1
2.9
80
1.2
6
0
1
2.1
2
25.7
81
0
7
3.2
2
2.1
3
1.7
82
4.8
Q101
3
2.2
4
0
83
3.5
E
2.2
4
0
5
13.0
84
3.7
C
11.6
5
5.0
6
26.0
85
2.1
B
3.0
6
185.7
7
2.9
86
2.1
Q521
7
114.6
IC601
87
2.0
E
0
8
118.4
1
18.5
88
3.2
C
8.9
9
121.3
2
0
89
0
B
0
3
0.1
90
3.2
Q522
4
0
91
1.6
E
0
5
9.1
92
0
C
112.0
6
2.1
93
1.8
B
-0.1
7
0
94
3.2
Q571
8
19.6
95
0
E
115.3
9
13.4
96
1.7
C
0
IC701
97
3.2
B
114.8
1
0
98
0.1
Q572
2
0
99
0
E
0
3
1.8
100
1.8
C
3.2
4
3.2
101
0
B
0
5
3.2
102
3.2
Q601
6
0
103
3.2
E
8.1
7
0
104
0
C
0.2
8
0
105
0
B
8.2
9
3.3
106
0.2
Q602
10
1.5
107
0
E
0.2
11
1.5
108
3.6
C
-0.2
12
0
109
3.6
B
0
13
0
110
3.2
Q605
14
2.9
111
0
E
0
15
4.9
112
3.2
C
2.3
16
1.9
113
2.9
B
-0.2
17
2.3
114
3.2
Q607
18
0
115
0
E
0
19
2.3
116
0
C
0
20
2.3
117
1.8
B
0.6
21
0
118
1.9
Q608
22
2.4
119
3.2
E
0
23
2.0
120
0.6
C
14.6
24
1.9
121
0
B
0
25
0
122
0.5
Q703
26
2.4
123
0
E
3.2
27
1.9
124
1.7
C
0
28
0
125
0
B
3.2
29
1.9
126
3.2
Q801
30
1.9
127
3.2
E
2.0
31
2.1
128
3.2
C
0
32
3.3
IC702
B
1.3
33
0.1
1
0
Q803
34
2.2
2
0
E
0
35
2.2
3
0
C
0
36
3.5
4
0
B
-1.0
37
3.5
5
3.2
Q805
38
2.2
6
3.2
E
0.2
39
2.5
7
0
C
-1.0
40
0
8
3.2
B
0
41
2.0
IC801
Q980
42
1.8
1
3.1
E
14.2
43
2.2
2
3.1
C
6.4
44
0.4
3
0.1
B
14.2
45
8.2
IC921
Q981
46
1.6
1
288.4
E
0
47
4.8
3
0
C
14.2
48
1.3
4
0
B
0
49
2.2
5
31.8
Q982
50
2.1
6
3.6
E
0
51
1.4
7
0.9
C
0
52
1.5
IC972
B
0.7
53
2.1
1
1.3
TU001
54
2.2
2
0
1
2.2
55
1.4
3
3.3
2
3.7
56
2.2
IC973
3
0
57
2.2
1
14.2
4
3.5
58
1.4
2
11.9
5
3.5
59
1.4
3
0
6
4.8
60
7.4
4
3.2
7
4.8
61
7.4
IC974
8
0
62
3.6
1
1.8
9
34.6
63
3.5
2
0
10
0
64
0
3
0
11
0
65
2.0
4
0.5
66
0.3
5
2.9
67
1.6
6
0
68
0
7
3.2
69
4.9
IC975
70
1.3
1
5.2
71
1.3
2
5.0
72
1.3
3
0
73
1.9
4
3.3
74
1.7
IC976
75
0.1
1
1.8
76
0
2
0
77
3.3
3
0
78
1.3
4
0.5
WAVEFORMS
-MAIN PWB-
IC401-1
IC401-3
[V]
0.8Vp-p
IC701-10
IC701-11
[0.2us/div]
2.4Vp-p
IC701-66
IC701-67
[H]
5.0Vp-p
T522-2
T522-3
[H]
3.0Vp-p
Q521-B
Q521-C
[H]
1.4Vp-p
-CRT SOCKET PWB-
IC351-7
IC351-8
[H]
110Vp-p
(No.YA252)2-13
2-14(No.YA252)
IC401-5
IC401-6
[V]
[V]
[V]
25Vp-p
48Vp-p
27Vp-p
IC701-22
IC701-23
IC701-48
[0.2us/div]
[V]
[V]
3.0Vp-p
1.9Vp-p
2.6Vp-p
IC701-74
IC701-85
IC701-86
[H]
[H]
[H]
3.0Vp-p
0.3Vp-p
2.0Vp-p
T522-4
T522-5
T522-7
[H]
[H]
[H]
50Vp-p
4.5Vp-p
230Vp-p
Q522-B
Q522-C
[H]
[H]
[H]
34Vp-p
9.0Vp-p
960Vp-p
IC351-9
[H]
[H]
150Vp-p
160Vp-p
[H]
2.0Vp-p
IC701-87
[H]
[H]
1.5Vp-p
2.3Vp-p
T522-9
[H]
[H]
30Vp-p
200Vp-p
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