![WATSON VR-3780 Service Manual Download Page 18](http://html1.mh-extra.com/html/watson/vr-3780/vr-3780_service-manual_4524584018.webp)
17
CIRCUIT INFORMATION
A/V
MODE
LOC.
PIN
EE
PLAY
REC.
IC301
1
5.09
0.1
0.78
2
0.03
0.03
0.84
3
2.29
2.28
2.55
4
0.33
0.17
0.62
5
2.28
2.27
2.49
6
2.29
2.28
2.27
7
2.28
2.28
2.28
8
2.28
2.28
2.28
9
2.28
2.28
2.25
10
2.29
2.28
2.28
11
2.4
2.4
2.4
12
0.02
0.02
0.02
13
2.29
2.28
2.27
14
0.05
0.04
0.04
15
2.29
2.28
2.27
16
5.16
0.18
5.15
17
2.29
2.28
2.27
18
5.15
5.121
5.14
19
4.21
4.16
4.13
20
0.02
0.02
0.02
21
3.32
1.99
3.32
22
3.2
3.17
3.2
23
3.2
3.2
3.2
24
5.16
5.13
5.16
25
0.16
3.3
0.15
26
1.42
1.67
1.42
27
2.1
2.1
2.04
28
4.2
4.16
4.17
29
2.79
2.74
2.81
30
0.02
0
0.02
32
5.07
4.91
4.97
33
2.12
2.03
2.11
34
1.57
1.57
1.57
35
2.1
2.09
2.1
36
3.48
3.45
3.59
37
1.69
1.66
1.72
38
2.04
2.01
2.08
39
9.5
9.47
9.48
40
0.02
0.02
0.02
41
0.02
0.02
0.02
42
5.16
5.13
5.15
43
2.23
2.44
2.23
44
0.06
4.21
0.04
45
2.27
2.28
2.29
46
2.42
2.67
2.43
47
4.15
4.15
4.16
48
1.89
1.89
1.88
49
2.94
3.16
2.94
50
1.95
1.95
1.93
51
0.02
0.02
0.02
52
1.94
1.95
1.92
53
1.35
2.34
2.18
54
1.94
1.95
1.92
55
5.17
5.17
5.14
56
2.17
2.31
2.16
57
2
2.15
2
58
1.98
1.98
1.98
59
2.93
2.95
2.92
60
1.43
1.58
1.43
61
1.57
1.86
1.58
62
0
0.07
0.07
A/V
MODE
LOC.
PIN
EE
PLAY
REC.
63
1.19
1.02
1.21
64
0.02
0.02
0.02
65
0.85
1.92
0.86
66
0.06
1.45
0.07
67
4.49
0.35
4.49
68
5.05
5.07
5.05
69
5
5.01
5.01
70
0.01
2.61
2.6
71
1.73
1.68
1.67
72
5.12
5.1
5.11
73
2.2
2.06
2.2
74
2.3
2.6
2.31
75
2.22
0.69
2.23
76
2.22
0.76
2.23
77
1.7
1.52
1.6
78
2.66
3.37
2.67
79
2.02
1.96
2.52
80
0.95
0.96
4.53
81
1.15
1.14
1.15
82
0.02
0.02
0.02
83
0.45
1.35
1.28
84
1.39
2.26
1.13
85
0.39
0.02
0.66
86
0.2
0.27
1.63
87
1.93
1.96
4.35
88
1.93
1.95
4.33
89
1.93
1.95
4.33
90
1.93
1.96
4.35
91
5.14
5.12
5.12
92
0.02
0.02
0.02
93
1.94
0.74
0.73
94
1.94
0.74
0.73
95
1.94
0.74
0.73
96
1.95
0.74
0.73
97
0
0.02
0.02
98
2.29
2.29
2.43
99
2.29
2.29
2.43
100
2.29
2.29
2.56
A/V
MODE
LOC.
PIN
EE
PLAY
REC.
Q201
E
0.02
0.02
0.02
B
0.03
0.03
0.84
C
5.11
0.1
0.77
Q203
E
3.51
0.1
0.89
B
3.43
0.04
1.64
C
5.04
0.04
4.83
Q204
E
0
0.02
-14.24
B
0
0.7
-19.43
C
5.11
0.03
1.05
Q205
E
0.14
0.02
-14.15
B
0
0.71
-18.87
C
0.02
0.02
0.02
Q206
E
5.16
5.16
5.16
B
5.16
4.46
5.15
C
1.81
5.12
-19.1
Q207
E
5.97
5.97
5.91
B
5.96
5.96
5.11
C
5.34
0.02
5.07
Q208
E
0
0
0
B
0
0
0.68
C
5.96
5.96
0.02
Q301
E
2.14
2.13
2.15
B
2.78
2.76
2.76
C
5.16
5.15
5.15
Q305
E
1.4
1.32
1.4
B
2.03
2.3
2.06
C
5.17
5.17
5.16
Q330
E
2.73
2.01
2.73
B
2.05
2.67
2.05
C
0
0.12
0
Q331
E
2.06
2.32
2.06
B
2.73
2.98
2.72
C
5.17
5.17
5.16
SECAM COLOR
MODE
LOC.
PIN
EE
PLAY
REC.
IC361
1
2.58
2.58
2.55
2
2.39
2.4
2.4
3
3.6
3.59
3.63
4
2.67
2.66
2.64
5
0.02
0
0.01
6
0.38
3.72
0.49
7
0.02
0.02
0.03
8
0.02
0.02
0.03
9
3.13
3.13
3.12
10
4.83
4.83
4.79
11
1.96
1.95
2
12
2.2
1.99
2.28
13
3.98
3.98
3.99
14
2.61
2.61
2.58
15
3.1
2.6
3.13
16
3.18
3.18
3.19
17
0
5.23
0
18
0.14
2.1
0.15
19
2.27
2.27
2.3
20
1.9
2.95
1.93
21
2.04
2.32
2.03
22
0.9
0
0.01
23
5.15
5.14
5.13
24
5.15
5.14
5.13
25
2.26
2.21
2.27
26
2.26
2.21
2.24
27
4.85
4.9
4.84
28
4.66
4.65
4.64
29
0.39
0.35
0.39
30
1.83
1.83
1.83
1. IC301 PIN78 X: 0.1V DIV
RECY-FM Y : 10uS DIV
2. IC301 PIN21 X: 0.1V DIV
REC COLOR(PAL) Y:20uS DIV
5. IC301 PIN21 X: 0.1V DIV
PB COLOR(SCM) Y : 20uS DIV
8. IC301 PIN50 X: 0.2V DIV
VIDEO INPUT(REC) Y : 20uS DIV
3. IC301 PIN25 X: 0.1V DIV
PB COLOR(PAL) Y: 20uS DIV
4. IC301 PIN25 X: 0.1V DIV
REC COLOR (SCM)Y :20uS DIV
6. IC301 PIN3 X : 1V DIV
C.SYNC Y : 20uS DIV
7. IC301 PIN58 X: 0.2V DIV
REC SECAM Y: 20uS DIV
9. IC301 PIN79 X : 0.1V DIV
PB ENVE Y : 2mS DIV
10. IC301 PIN43 X : 0.1V DIV
Y-DLY OUT(PB) Y 20uS DIV
11. IC301 PIN43 X: 0.1V DIV
Y-DLY OUT(REC) Y : 20us DIV
12. IC301 PIN74 X: 0.1V DIV
DEEMPHA OUT (PB) Y:20uS DIV
13. IC301 PIN65 X: 0.5V DIV
VIDEO OUT(REC) Y : 20uS DIV
Summary of Contents for VR-3780
Page 1: ...SERVICE MANUAL WATSON VR 3780 MODEL...
Page 10: ...9 CIRCUIT INFORMATION 1 INTERCONNECT WIRING DIAGRAM...
Page 11: ...10 CIRCUIT INFORMATION 2 POWER CIRCUIT DIAGRAM...
Page 13: ...12 CIRCUIT INFORMATION 3 POWER BLOCK DIAGRAM...
Page 14: ...13 CIRCUIT INFORMATION 4 SYSCON CIRCUIT DIAGRAM...
Page 16: ...15 CIRCUIT INFORMATION 5 SERVO SYSCON BLOCK DIAGRAM...
Page 17: ...16 CIRCUIT INFORMATION 6 AV SECAM COLOR CIRCUIT DIAGRAM...
Page 19: ...18 CIRCUIT INFORMATION 7 1 VIDEO PLAYBACK PATH FOR PAL 7 2 VIDEO RECORD PATH FOR PAL...
Page 20: ...19 CIRCUIT INFORMATION 8 HIFI SW CIRCUIT DIAGRAM...
Page 22: ...21 CIRCUIT INFORMATION 9 PIF CIRCUIT DIAGRAM...
Page 24: ...23 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW PCB MAIN...
Page 25: ...24 DISASSEMBLY 1 PACKING ASS Y...
Page 26: ...25 DISASSEMBLY 2 FRONT PANEL ASSEMBLY DVST7J3 SERIES DVST7C3 SERIES...
Page 27: ...26 DISASSEMBLY DVST7D3 SERIES DVST7L3 SERIES...
Page 28: ...27 DISASSEMBLY DVST7B3 SERIES DVST7E3 SERIES...
Page 29: ...28 DISASSEMBLY DVST7M3 SERIES...
Page 30: ...29 DISASSEMBLY 3 INSTRUMENT DISASSEMBLY 3 1 SET TOTAL...