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Manuals
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Sharp Manuals
MiniDisc Player
MD-R2H
Service manual
Sharp MD-R2H Service Manual page 42
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MD-R2H
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
1
2.8V
1.48V
2
2
2.6V
0V
3
3
4.9V
1.6V
4
4
2.6V
0V
5
5
1.6V
1.36V
6
6
0V
1.77V
7
7
0V
1.6V
8
8
4.9V
1.36V
9
9
0V
1.77V
10
10
2.2V
1.25V
11
5V
11
1.6V
12
12
5V
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
IC1990
20
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
28
6
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
43
0.7V
2V
2
44
0.7V
3V
3
45
0.7V
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
51
1.6V
58V
11
52
1.6V
0V
12
53
1.6V
0V
13
54
3.2V
58V
14
55
3.2V
0V
15
56
0V
0V
16
57
Groove:3.2V
3.2V
58
Pit:0V
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
IC1401
PIN
VOLTAGE
NO.
1
0V
2
0V
3
0.2V
4
3.2V
5
0V
6
0V
7
3.1V
8
0V
9
0V
10
0V
11
0V
12
3.18V
13
144V
14
0V
15
1.5V
16
3.2V
17
3.2V
18
3.1V
19
0V
20
0V
21
0V
22
3.15V
23
3.2V
24
0V
25
3.2V
26
3.2V
27
0V
28
0V
29
2V
30
3.2V
31
0V
32
3.2V
33
0V
34
0.8V
35
2.2V
36
0.2V
37
2.3V
38
0V
39
PLAY:3.15V
REC:0V
40
0V
41
0V
42
0V
43
3.2V
44
0V
45
0V
46
3.15V
47
0V
48
0V
49
0V
50
0V
51
0V
52
0V
53
0V
54
0V
55
0V
56
0V
57
0V
58
0V
59
3.2V
60
0V
61
3.2V
62
3.2V
63
0V
64
0V
65
3.2V
66
3.2V
67
3.2V
68
0V
69
0V
70
3.1V
71
0V
72
3.1V
73
97A:0V
97B:3.2V
74
0V
75
3.2V
76
3.2V
77
0V
78
0V
79
0V
80
3.15V
81
0V
82
0V
83
3.2V
84
3.2V
85
3.2V
86
3.2V
87
3.2V
88
3.2V
89
1.7V
90
1.8V
91
1.8V
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
– 42 –
IC1601
IC1916
PIN
PIN
PIN
VOLTAGE
NO. VOLTAGE
NO. VOLTAGE
NO.
1
1
1
1.25V
1.58V
2
2
2
4V
3.2V
3
3
3
1.5V
1.58V
4
4
4
5.5V
3.2V
5
5
5
5.5V
DIC input:2.2V
6
1.5V
Other:0V
6
6
7
5V
DIC input:1.58V
8
2.7V
Other:0V
9
2.8V
7
1.55V
10
8
0V
2.2V
11
9
9
0V
3.2V
12
10
10
2.7V
3.2V
13
11
11
2.76V
97A:3.2V
14
1.6V
97B:1V
15
12
1.6V
97A:3.2V
16
1.6V
97A:0.9V
17
3.15V
18
3.15V
IC1402
19
0V
20
PIN
1.6V
NO. VOLTAGE
21
1.6V
1
0V
22
1.6V
2
3.2V
23
1.23V
3
24
3.2V
1.23V
4
3.2V
25
1.6V
5
0V
26
1.6V
6
0V
27
1.62V
7
0V
28
2.7V
8
0V
29
2.8V
30
2.7V
31
2.7V
IC1906
32
0V
33
PIN
0V
NO. VOLTAGE
34
3.0V
1
35
5.5V
2.4V
2
36
1.6V
0V
3
37
0V
1.64V
4
38
2.8V
5.5V
5
39
5.5V
5.5V
40
1.64V
41
1.68V
42
1.68V
IC1251
PIN
NO. VOLTAGE
1
2.6V
2
2.6V
3
0.1V
4
2.6V
5
2.6V
6
0.1V
7
0V
8
1.56V
9
0.1V
10
2.6V
11
1.56V
12
0.1V
13
2.6V
14
5.2V
Q1251
PIN
NO. VOLTAGE
D
4.4V
S
1.4V
G
2.6V
Q1252
PIN
NO. VOLTAGE
D
4.4V
S
1.4V
G
2.6V
Q1253
PIN
NO. VOLTAGE
D
15V
S
0V
G
2.6V
Q1254
PIN
NO. VOLTAGE
D
15V
S
0V
G
2.6V
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