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Speaker System
MD-X7H
Service manual
Voltage - Sharp MD-X7H Service Manual
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:
Operation manual
(64 pages)
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Contents
Table of Contents
Troubleshooting
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MD-X8H
Q1801
PIN
PIN
NO. VOLTAGE
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
PIN
NO. VOLTAGE
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
PIN
NO. VOLTAGE
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
IC1901
PIN
NO. VOLTAGE
1
5.5V
2
1.6V
3
0V
4
2.8V
5
5.5V
VOLTAGE (MD MAIN PWB)
IC1201
IC1907
PIN
NO. VOLTAGE
1
1.48V
1
2.8V
2
2
0V
2.6V
3
1.6V
3
4.9V
4
4
0V
2.6V
5
1.36V
5
1.6V
6
1.77V
6
0V
7
7
1.6V
0V
8
1.36V
8
4.9V
9
1.77V
9
0V
10
10
1.25V
2.2V
11
1.6V
11
5V
12
3.17V
12
5V
13
13
0V
0V
14
0V
14
3.2V
15
15
0V
3.1V
16
16
0V
5V
17
1.45V
IC1990
18
1.56V
19
1.62V
20
1.7V
1
1.45V
21
1.5V
2
1.7V
22
1.63V
3
1.45V
23
1.53V
4
1.7V
24
1.8V
5
1.45V
25
1.4V
6
1.7V
26
1.2V
7
0V
27
2.5V
8
1.7V
28
0.8V
9
29
1.45V
1.8V
10
1.37V
30
1.4V
11
1.7V
31
3.2V
12
1.37V
32
1.2V
13
1.7V
33
2.5V
14
3.17V
34
1.3V
35
1.7V
IC1101
36
1.3V
37
2.2V
38
0V
1
0.7V
39
2.4V
2
0.7V
40
1.2V
3
0.7V
41
1.1V
4
0.7V
42
1.5V
5
1.6V
43
2V
6
1.6V
44
3V
7
0.7V
45
1.1V
8
1.6V
46
1.1V
9
1.6V
47
0V
10
1.6V
48
3V
11
1.6V
49
1.56V
12
1.6V
50
PLAY:0V
13
3.2V
REC:1.5V
14
3.2V
51
58V
15
0V
52
0V
16
Groove:3.2V
53
0V
Pit:0V
54
58V
17
Low reflection:0V
55
0V
High reflection :3.2V
56
0V
18
0V
57
3.2V
19
0V
58
3.2V
20
1.45V
59
3.2V
21
3.2V
60
3.17V
22
0V
61
0V
23
0V
62
3.17V
24
3.2V
63
0V
25
1.78V
64
1.3V
26
1.78V
65
1.3V
27
1.35V
66
Digital input:1.58V
28
1.36V
Others:0V
29
1.6V
67
1.58V
30
1.6V
68
3.17V
31
1.6V
69
0V
32
1.6V
70
1.5V
33
1.6V
71
1.55V
34
0V
72
1.5V
35
1.6V
73
0V
36
1.6V
74
1V
37
0.3V
75
1.55V
38
1.6V
76
1.8V
39
1.6V
77
1.56V
40
1.6V
78
0V
41
1.6V
79
0V
42
3.2V
80
3.16V
43
0V
81
0V
44
1V
82
0V
45
1.6V
83
0V
46
1.6V
84
1.5V
47
0.7V
85
1.5V
48
0.7V
86
3.1V
87
3.17V
88
0V
89
3.17V
90
0.5V
91
0.6V
92
0.4V
93
0.4V
94
0.4V
95
0.9V
96
0.7V
97
0.8V
98
3.16V
99
3.15V
100
0V
IC1401
IC1601
PIN
PIN
NO. VOLTAGE
VOLTAGE
NO.
1
1
0V
1.25V
2
2
0V
4V
3
3
0.2V
1.5V
4
4
3.2V
5.5V
5
5
0V
5.5V
6
6
0V
1.5V
7
7
3.1V
5V
8
8
0V
2.7V
9
9
0V
2.8V
10
10
0V
0V
11
11
0V
0V
12
12
3.18V
2.7V
13
13
144V
2.76V
14
14
0V
1.6V
15
15
1.5V
1.6V
16
16
3.2V
1.6V
17
17
3.2V
3.15V
18
18
3.1V
3.15V
19
19
0V
0V
20
20
0V
1.6V
21
21
0V
1.6V
22
22
3.15V
1.6V
23
23
3.2V
1.23V
24
24
0V
1.23V
25
25
3.2V
1.6V
26
26
3.2V
1.6V
27
27
0V
1.62V
28
28
0V
2.7V
29
29
2V
2.8V
30
30
3.2V
2.7V
31
31
0V
2.7V
32
32
3.2V
0V
33
33
0V
0V
34
0.8V
34
3.0V
35
35
2.2V
2.4V
36
36
0.2V
0V
37
37
2.3V
1.64V
38
38
0V
5.5V
39
39
PLAY:3.15V
5.5V
40
REC:0V
1.64V
40
41
0V
1.68V
41
0V
42
1.68V
42
0V
43
IC1251
3.2V
44
0V
PIN
NO. VOLTAGE
45
0V
46
1
3.15V
2.6V
47
0V
2
2.6V
48
3
0V
0.1V
49
0V
4
2.6V
50
0V
5
2.6V
51
6
0V
0.1V
52
0V
7
0V
53
8
0V
1.56V
54
9
0V
0.1V
55
0V
10
2.6V
56
11
0V
1.56V
57
0V
12
0.1V
58
0V
13
2.6V
59
14
3.2V
5.2V
60
0V
61
Q1251
3.2V
62
3.2V
PIN
NO. VOLTAGE
63
0V
64
D
0V
4.4V
65
3.2V
S
1.4V
66
G
3.2V
2.6V
67
3.2V
68
0V
Q1252
69
0V
PIN
NO. VOLTAGE
70
3.1V
71
0V
D
4.4V
72
3.1V
S
1.4V
73
97A:0V
G
2.6V
97B:3.2V
74
Q1253
0V
75
3.2V
PIN
NO. VOLTAGE
76
3.2V
77
D
0V
15V
78
0V
S
0V
79
G
0V
2.6V
80
3.15V
81
Q1254
0V
82
0V
PIN
NO. VOLTAGE
83
3.2V
84
D
3.2V
15V
85
S
3.2V
0V
86
G
3.2V
2.6V
87
3.2V
88
3.2V
89
1.7V
90
1.8V
91
1.8V
92
1.4V
93
Low reflection:2.2V
High reflection:0.1V
94
3.2V
95
3.2V
96
0V
97
2V
98
3.2V
99
3.2V
100
0V
– 68 –
IC1916
IC1202
PIN
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
NO. VOLTAGE
1
1
1.58V
1
1.1V
2
2
3.2V
2
1.1V
3
3
3
1.58V
3V
4
4
3.2V
4
2V
5
5
Digital input:2.2V
5
1.5V
Others:0V
6
1.8V
6
6
Digital input:1.58V
7
0.8V
8
Others:0V
2.4V
7
1.55V
9
1.2V
8
2.2V
10
3.2V
9
9
11
3.2V
1.2V
10
10
3.2V
12
2.5V
11
11
97A:3.2V
13
1.3V
14
97B:1V
1.7V
12
97A:3.2V
15
1.3V
97A:0.9V
16
2.2V
17
2.4V
Q1804
18
1.2V
PIN
19
1.1V
NO. VOLTAGE
20
0V
E
5.4V
C
5.4V
B
4.8V
Q1805
PIN
NO. VOLTAGE
E
0V
C
0.7V
B
3.1V
Q1701
PIN
NO. VOLTAGE
E
3.2V
C
5.4V
B
3.85V
IC1802
PIN
NO. VOLTAGE
1
2.46V
2
0V
3
3.85V
IC1701
PIN
NO. VOLTAGE
1
0V
2
3.2V
3
1.4V
4
1.5V
5
1.4V
6
0V
7
3.2V
8
0V
9
0V
10
3.2V
11
0V
12
1.5V
13
3.17V
14
3.17V
15
3.17V
16
1.55V
17
3.17V
18
0V
19
1V
20
0V
21
0V
22
0V
23
3.2V
24
1.57V
25
3.2V
26
1.57V
27
0V
28
1.6V
IC1402
PIN
NO. VOLTAGE
1
0V
2
3.2V
3
3.2V
4
3.2V
5
0V
6
0V
7
0V
8
0V
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Table of Contents
Troubleshooting
TROUBLESHOOTING (CD SECTION)
108
TROUBLESHOOTING (MD SECTION)
112
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