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Sharp Manuals
Minidisc Recorder
MD-R3
Service manual
Voltage (Md Main Pwb) - Sharp MD-R3 Service Manual
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:
Operation manual
(48 pages)
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Table of Contents
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MD-R3
Q1801
PIN
NO. VOLTAGE
E
5V
C
5V
B
43V
Q1802
PIN
NO. VOLTAGE
E
0V
C
0V
B
0.15V
Q1803
PIN
NO. VOLTAGE
E
0V
C
0V
B
3.1V
Q1807
PIN
NO. VOLTAGE
E
3.95V
C
3.2V
B
3.3V
Q1820
PIN
NO. VOLTAGE
E
3.2V
C
3.18V
B
2.4V
Q1821
PIN
NO. VOLTAGE
E
0V
C
0V
B
3.08V
Q1822
PIN
NO. VOLTAGE
E
0V
C
0V
B
0.1V
Q1451
PIN
NO. VOLTAGE
E
0V
C
3.18V
B
0.1V
Q1401
PIN
NO. VOLTAGE
E
3.2V
C
3.2V
B
0V
Q1402
PIN
NO. VOLTAGE
E
0V
C
0V
B
2.3V
Q1403
PIN
NO. VOLTAGE
E
3.18V
C
0V
B
3.15V
Q1404
PIN
NO. VOLTAGE
E
0V
C
3.15V
B
2.1V
Q1601
PIN
NO. VOLTAGE
E
5.45V
C
4.4V
B
4.8V
IC1801
PIN
NO. VOLTAGE
1
0V
2
44V
3
3.2V
4
3.1V
5
0V
VOLTAGE (MD MAIN PWB)
IC1907
IC1201
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
1
2.8V
1
1.48V
2
2.6V
2
0V
3
4.9V
3
1.6V
4
2.6V
4
0V
5
1.6V
5
1.36V
6
0V
6
1.77V
7
0V
7
1.6V
8
8
4.9V
1.36V
9
9
0V
1.77V
10
2.2V
10
1.25V
11
11
5V
1.6V
12
5V
12
3.17V
13
13
0V
0V
14
14
3.2V
0V
15
15
3.1V
0V
16
16
5V
0V
17
1.45V
18
1.56V
19
1.62V
20
IC1990
1.7V
21
1.5V
PIN
NO. VOLTAGE
22
1.63V
23
1
1.45V
1.53V
24
2
1.7V
1.8V
25
3
1.45V
1.4V
26
4
1.7V
1.2V
27
5
1.45V
2.5V
6
28
1.7V
0.8V
7
29
0V
1.8V
8
30
1.7V
1.4V
9
31
1.45V
3.2V
10
32
1.37V
1.2V
11
33
1.7V
2.5V
12
34
1.37V
1.3V
13
35
1.7V
1.7V
14
36
3.17V
1.3V
37
2.2V
38
0V
39
2.4V
IC1101
40
1.2V
41
PIN
1.1V
NO. VOLTAGE
42
1.5V
1
0.7V
43
2V
2
0.7V
44
3V
3
0.7V
45
1.1V
4
0.7V
46
1.1V
5
1.6V
47
0V
6
1.6V
48
3V
7
0.7V
49
1.56V
8
1.6V
50
PLAY:0V
9
1.6V
REC:1.5V
10
1.6V
51
58V
11
1.6V
52
0V
12
1.6V
53
0V
13
3.2V
54
58V
14
3.2V
55
0V
15
0V
56
0V
16
Groove:3.2V
57
3.2V
Pit:0V
58
3.2V
17
Low reflection:0V
59
3.2V
High reflection:3.2V
60
3.17V
18
0V
61
0V
19
0V
62
3.17V
20
1.45V
63
0V
21
3.2V
64
1.3V
22
0V
65
1.3V
23
0V
66
DIC input:1.58V
24
3.2V
Other:0V
25
1.78V
67
1.58V
26
1.78V
68
3.17V
27
1.35V
69
0V
28
1.36V
70
1.5V
29
1.6V
71
1.55V
30
1.6V
72
1.5V
31
1.6V
73
0V
32
1.6V
74
1V
33
1.6V
75
1.55V
34
0V
76
1.8V
35
1.6V
77
1.56V
36
1.6V
78
0V
37
0.3V
79
0V
38
1.6V
80
3.16V
39
1.6V
81
0V
40
1.6V
82
0V
41
1.6V
83
0V
42
3.2V
84
1.5V
43
0V
85
1.5V
44
1V
86
3.1V
45
1.6V
87
3.17V
46
1.6V
88
0V
47
0.7V
89
3.17V
48
0.7V
90
0.5V
91
0.6V
92
0.4V
93
0.4V
IC1202
94
0.4V
95
PIN
0.9V
NO. VOLTAGE
96
0.7V
1
1.1V
97
0.8V
2
1.1V
98
3.16V
3
3V
99
3.15V
4
2V
100
0V
5
1.5V
6
1.8V
7
0.8V
8
2.4V
9
1.2V
10
3.2V
11
1.2V
12
2.5V
13
1.3V
14
1.7V
15
1.3V
16
2.2V
17
2.4V
18
1.2V
19
1.1V
20
0V
– 58 –
IC1601
IC1401
PIN
PIN
VOLTAGE
VOLTAGE
NO.
NO.
1
1.25V
1
0V
2
4V
2
0V
3
1.5V
3
0.2V
4
5.5V
4
3.2V
5
5.5V
5
0V
6
6
1.5V
0V
7
5V
7
3.1V
8
8
2.7V
0V
9
9
2.8V
0V
10
0V
10
0V
11
11
0V
0V
12
2.7V
12
3.18V
13
13
2.76V
144V
14
14
1.6V
0V
15
15
1.6V
1.5V
16
16
1.6V
3.2V
17
17
3.15V
3.2V
18
18
3.15V
3.1V
19
0V
19
0V
20
1.6V
20
0V
21
1.6V
21
0V
22
1.6V
22
3.15V
23
1.23V
23
3.2V
24
1.23V
24
0V
25
1.6V
25
3.2V
26
1.6V
26
3.2V
27
1.62V
27
0V
28
2.7V
28
0V
29
2.8V
29
2V
30
2.7V
30
3.2V
31
2.7V
31
0V
32
0V
32
3.2V
33
0V
33
0V
34
3.0V
34
0.8V
35
2.4V
35
2.2V
36
0V
36
0.2V
37
1.64V
37
2.3V
38
5.5V
38
0V
39
5.5V
39
PLAY:3.15V
40
1.64V
REC:0V
41
1.68V
40
0V
42
1.68V
41
0V
42
0V
43
3.2V
44
0V
45
0V
IC1251
46
3.15V
PIN
NO. VOLTAGE
47
0V
48
0V
1
2.6V
49
0V
2
2.6V
50
0V
3
0.1V
51
0V
4
2.6V
52
0V
5
2.6V
53
0V
6
0.1V
54
0V
7
0V
55
0V
8
1.56V
56
0V
9
0.1V
57
0V
10
2.6V
58
0V
11
1.56V
59
3.2V
12
0.1V
60
0V
13
2.6V
61
3.2V
14
5.2V
62
3.2V
63
0V
64
0V
65
Q1251
3.2V
66
PIN
3.2V
NO. VOLTAGE
67
3.2V
68
D
4.4V
0V
69
S
1.4V
0V
70
G
2.6V
3.1V
71
0V
72
3.1V
Q1252
73
97A:0V
PIN
NO. VOLTAGE
97B:3.2V
74
0V
D
4.4V
75
3.2V
S
1.4V
76
3.2V
G
2.6V
77
0V
78
0V
79
Q1253
0V
80
PIN
3.15V
NO. VOLTAGE
81
0V
82
D
15V
0V
83
S
0V
3.2V
84
G
2.6V
3.2V
85
3.2V
86
3.2V
Q1254
87
3.2V
PIN
88
NO. VOLTAGE
3.2V
89
1.7V
D
15V
90
1.8V
S
0V
91
1.8V
G
2.6V
92
1.4V
93
Low reflectio:2.2V
High reflection:0.1V
94
3.2V
95
3.2V
96
0V
97
2V
98
3.2V
99
3.2V
100
0V
IC1916
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
1
1
1.58V
2
2
3.2V
3
3
1.58V
4
4
3.2V
5
5
DIC input:2.2V
Other:0V
6
6
DIC input:1.58V
Other:0V
7
1.55V
8
2.2V
9
9
3.2V
10
10
3.2V
11
11
97A:3.2V
97B:1V
12
97A:3.2V
97A:0.9V
IC1402
PIN
NO. VOLTAGE
1
0V
2
3.2V
3
3.2V
4
3.2V
5
0V
6
0V
7
0V
8
0V
IC1906
PIN
NO. VOLTAGE
1
5.5V
2
1.6V
3
0V
4
2.8V
5
5.5V
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Table of Contents
Troubleshooting
Troubleshooting
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Trouble shooting (cd section)
62
Trouble shooting (md section)
66
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