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Sharp Manuals
Stereo Receiver
CD-PC672
Service manual
Sharp CD-PC672 Service Manual page 37
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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CD-PC672
IC1
IC2
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
1
1
2.4V
0V
2
2
2.4V
0V
3
3
2.5V
0V
4
4
2.5V
0V
5
5
2.4V
1.9V
6
6
2.5V
4.8V
7
7
2.5V
0V
8
8
2.5V
0V
9
9
2.5V
2.5V
10
2.5V
10
2.5V
11
11
2.5V
0V
12
12
2.5V
0V
13
13
2.5V
0V
14
14
2.5V
4.8V
15
15
2.5V
0V
16
16
2.5V
0V
17
17
2.5V
4.8V
18
18
2.5V
4.8V
19
19
2.5V
0V
20
20
2.4V
0V
21
21
2.5V
2.5V
22
22
0V
0V
23
23
2.5V
4.8V
24
24
2.5V
0V
25
25
2.5V
0V
26
26
2.5V
0V
27
27
2.5V
0V
28
28
2.5V
0V
29
29
2.5V
0V
30
30
2.2V
4.8V
31
31
2.2V
2.5V
32
0V
32
0V
33
33
0V
0V
34
34
4.8V
0V
35
35
4.8V
4.8V
36
36
0V
4.5V
37
37
0V
2.0V
38
38
4.8V
0V
39
39
0V
0V
40
40
0V
2.0V
41
41
1.5V
4.5V
42
42
2.4V
4.8V
43
43
2.5V
4.8V
44
44
2.4V
2.2V
45
45
0V
2.1V
46
46
2.5V
0V
47
47
2.5V
0V
48
48
0V
2.2V
49
49
0V
0V
50
50
2.4V
2.4V
51
51
4V
0V
52
52
4V
2.4V
53
53
0V
0V
54
54
0V
0V
55
55
4.8V
0V
56
56
4.8V
4.0V
57
57
2.5V
4.0V
58
58
2.5V
4.0V
59
59
1.0V
0V
60
60
1.0V
2.5V
61
61
2.2V
2.4V
62
62
4.2V
0V
63
63
0V
0V
64
64
4.8V
0V
IC901
IC901
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
1
0V
1
26.8V
2
0V
2
24.9V
3
-27.5V
3
0V
4
-27.5V
4
0V
5
-27.5V
5
25.0V
6
0V
6
26.8V
7
0V
7
29.2V
8
0V
8
24.7V
9
0V
9
24.1V
10
-25.8V
10
26.4V
11
26.0V
11
0V
12
-0.15V
12
25.0V
13
-0.15V
13
24.1V
14
-24.6V
14
24.7V
15
-0.1V
16
-0.1V
17
-0.1V
18
-0.1V
19
-27.5V
20
0V
VOLTAGE
IC3
IC301
PIN
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
NO. VOLTAGE
1
1
2.5V
0.9V (0V)
2
2.6V
2
1.6V (0V)
3
3
2.9V
6.0V (0.4V)
4
4
3.3V
1.6V (0V)
5
5
3.3V
0V (0V)
6
3.3V
6
6.0V (0.3V)
7
7
3.3V
5.2V (0.2V)
8
8
0V
5.9V (0.3V)
9
9
0V
6.0V (0.3V)
10
0V
IC650
11
0V
12
0V
PIN
NO. VOLTAGE
13
0V
1
14
0.12V
0V
15
2
3.3V
0.1V
16
3
3.3V
0.13V
17
4
3.0V
–11.2V
5
18
0.1V
7.2V
19
6
5.0V
0.1V
20
7
2.5V
0.1V
21
8
0V
6.2V
22
0V
23
0V
IC651
24
7.2V
PIN
25
NO. VOLTAGE
2.5V
26
3.3V
PIN
1
NO. VOLTAGE
0.2V
27
3.3V
2
0.2V
28
11.2V
3
0.2V
29
0V
4
–9.8V
30
0V
5
0.2V
31
0V
6
0.2V
32
0V
7
0.2V
33
0V
8
6.2V
34
0V
35
0V
IC702
36
5.3V
37
PIN
5.3V
NO. VOLTAGE
38
3.3V
1
39
0V
3.3V
40
2
7.2V
0V
3
41
0.2V
0.1V
4
42
0V
0.1V
5
9.8V
6
9.8V
IC101
7
9.8V
PIN
8
9.9V
NO. VOLTAGE
9
9.8V
1
0V (0V)
10
9.8V
2
0V (0V)
11
9.8V
3
0.5V (0.5V)
12
0.5V
4
4.3V (4.3V)
13
0.5V
5
0.2V (0.3V)
14
0.5V
6
1.3V (1.3V)
15
9.8V
7
0V (0V)
16
9.8V
8
0.6V (0.6V)
17
0V
9
4.1V (4.1V)
18
5.0V
10
4.0V (4.0V)
11
IC703
0V (0V)
12
0V (0V)
PIN
NO. VOLTAGE
13
8.1V (8.1V)
14
1
4.8V (4.8V)
0V
15
0V (0V)
2
0V
16
4.1V (4.1V)
3
0.2V
17
0.6V (0.6V)
4
0V
18
5
0V (0V)
9.8V
19
2.5V (2.6V)
6
9.8V
20
0.2V (0.3V)
7
9.8V
21
4.3V (4.3V)
8
9.9V
22
9
0.5V (0.5V)
9.8V
23
0V (0V)
10
9.8V
24
0V (0V)
11
9.8V
12
0.5V
IC471
13
0.5V
14
0.5V
PIN
NO. VOLTAGE
15
9.8V
16
1
5.6V
9.8V
2
17
5.6V
0V
18
3
5.0V
5.5V
4
0V
5
5.6V
6
5.6V
7
5.6V
8
11.1V
IC601
PIN
NO. VOLTAGE
1
5.6V
2
5.6V
3
5.5V
4
0V
5
5.5V
6
5.6V
7
5.6V
8
11.1V
– 40 –
IC302
IC303
PIN
PIN
NO. VOLTAGE
NO.
1
1
2.5V (2.5V)
1.6V (1.6V)
2
2
0V (0V)
1.6V (1.6V)
3
3
0V (0V)
7.1V (8.1V)
4
4
0V (0V)
0.2V (0.6V)
5
5
4.5V (4.5V)
1.6V (1.6V)
6
6
4.5V (4.5V)
0V (0V)
7
7
0.2V (11.9V)
5.1V (5.1V)
8
8
0V (0V)
0V (0V)
9
9
0V (0V)
2.3V (2.3V)
10
10
10
0V (0V)
2.3V (2.3V)
11
11
11
5.1V (5.1V)
6.4V (8.1V)
12
12
12
0V (0V)
0.9V (0.9V)
13
13
13
0V (0V)
1.1V (2.1V)
14
14
14
0V (0V)
1.8V (1.6V)
15
15
15
0V (2.5V)
2.2V (1.3V)
16
16
16
2.5V (0V)
1.7V (1.7V)
17
17
17
5.1V (5.1V)
1.6V (1.7V)
18
18
18
0.9V (0.9V)
1.6V (1.6V)
19
19
19
0.9V (0.9V)
0.4V (0.5V)
20
20
20
1.3V (1.1V)
7.1V (8.1V)
21
21
21
0V (0V)
7.1V (8.1V)
22
22
22
2.5V (2.5V)
1.7V (1.7V)
23
23
1.7V (1.7V)
24
24
1.7V (1.7V)
IC401
25
26
IC501
27
PIN
1
28
5.0V
NO. VOLTAGE
2
5.0V
29
1
4.7V
3
4.9V
30
2
4.7V
4
31
4.8V
3
4.7V
5
32
5.0V
4
4.7V
6
4.9V
33
5
4.7V
7
34
4.8V
6
4.7V
8
35
5.0V
7
4.7V
9
4.8V
36
8
9.4V
10
4.8V
37
9
4.7V
11
38
5.0V
10
4.7V
12
39
4.9V
11
4.7V
13
4.8V
40
12
4.7V
14
5.0V
41
13
4.7V
15
4.9V
42
14
4.7V
16
5.0V
43
15
4.7V
17
5.0V
44
16
4.7V
18
4.9V
45
17
0V
19
5.0V
46
18
9.4V
20
5.0V
47
19
2.5V
21
5.0V
48
20
0.6V
22
5.0V
49
21
-0.1V
23
4.0V
50
22
4.7V
24
-0.1V
23
4.7V
25
-0.1V
24
4.7V
26
0V
25
4.7V
27
5.0V
PIN
NO. VOLTAGE
26
4.7V
28
5.0V
27
4.7V
29
5.0V
28
4.7V
30
4.9V
29
4.7V
31
5.0V
30
4.7V
32
5.0V
31
5.0V
33
4.9V
32
2.3V
34
5.0V
PIN
33
NO. VOLTAGE
-0.1V
35
4.8V
34
4.0V
36
4.9V
35
-0.1V
37
5.0V
36
3.6V
38
4.8V
37
-0.1V
39
4.9V
38
4.0V
40
5.0V
39
0V
41
4.8V
40
4.7V
42
4.9V
41
4.8V
43
5.0V
42
0V
44
4.8V
43
4.7V
45
4.9V
44
4.7V
46
5.0V
45
4.7V
47
5.0V
46
4.7V
48
4.9V
47
4.7V
49
5.0V
48
4.7V
50
5.0V
49
4.7V
51
5.0V
50
4.7V
52
5.0V
51
5.4V
53
5.0V
52
4.7V
54
5.0V
53
5.4V
55
5.0V
54
4.6V
56
10.0V
55
4.6V
57
5.0V
56
4.6V
58
5.0V
57
3.7V
59
5.0V
58
3.5V
60
5.0V
59
3.4V
61
5.0V
60
5.4V
62
5.0V
61
4.8V
63
5.0V
62
5.4V
64
4.9V
63
4.7V
64
4.7V
IC701
PIN VOLTAGE
VOLTAGE
NO.
1
51
4.7V
4.7V
2
52
4.7V
0V
3
53
0V
4.6V
4
54
0V
4.7V
5
55
0V
0V
6
56
0V
0V
7
57
0V
4.6V
8
58
0V
4.6V
9
59
0V
4.6V
60
4.7V
4.6V
61
2.2V
0V
62
2.0V
4.7V
63
0V
4.7V
64
4.6V
5.0V
65
0V
4.9V
66
4.7V
–27.0V
67
0V
–27.0V
68
4.7V
–27.0V
69
0V
–27.0V
70
4.7V
–27.0V
71
4.7V
–27.0V
72
0V
–27.0V
73
0V
0V
74
0V
0V
0V
75
-26.0V
76
0V
–22.0V
77
0V
–24.0V
78
0V
0V
79
0V
–27.0V
80
0.9V
–24.0V
81
4.9V
–24.0V
4.9V
82
–24.0V
83
4.9V
0V
84
4.7V
0V
85
4.9V
–21.0V
86
4.6V
0V
87
4.6V
0V
88
4.9V
0V
89
4.9V
0V
90
0V
–24.0V
91
0V
0V
92
4.6V
–24.0V
93
3.5V
0V
94
11.9V
–24.0V
95
11.9V
0V
96
4.4V
–24.0V
97
4.6V
–24.0V
0V
98
–24.0V
99
4.6V
–24.0V
100
0V
–24.0V
IC805
IC803
PIN
NO. VOLTAGE
1
1
17.0V
7.1V
2
2
1.3V
0.6V
3
3
7.3V
5.5V
IC804
IC806
PIN
NO. VOLTAGE
1
17.0V
1
12.0V
2
0V
2
1.3V
3
12.0V
3
4.9V
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