Sharp MS722 - MiniDisc Recorder - Metallic Service Manual page 33

IC101
PIN PIN
VOLTAGE VOLTAGE
NO. NO.
1 1
0.7V 1V
2 2
0.7V 2.5V
3 3
0.7V 1.27V
4 4
0.7V 0V
5 5
1.29V 1.27V
6 6
1.26V 1.27V
7 7
0.7V
1.27V
8 8
1.26V 1.27V
9 9
1.26V 126V
10 10
1.26V 2.2V
11 11
1.26V 1.43V
12 12
1.26V 2V
13 2.52V 13
0V
14 14
2.52V
0V
15 15
0.18V 0V
16 16
2.52V 0V
17 17
2.52V 1V
18 18
0V 0V
19 19
0V 0V
20 1.46V 20
0V
21 2.34V 21
0V
22 22
0V 0V
23 23
0V 0V
24 24
2.51V 0V
25 25
1.26V 0V
26 1.26V 26
1.58V
27 1.26V 27
0.87V
28 1.26V 28
0.87V
29 1.26V 29 1.73V
30 1.6V 30 1.1V
31 31
1.26V 2.5V
32 1.26V 32
0.6V
33 1.26V 33
0.8V
34 NC 34
1.9V
35 1.26V 35
0.9V
36 1.26V 36 1.29V
37 0V 37 1.8V
1.26V
38 38 0V
1.26V
39 39 1.9V
40 1.26V 40
1.6V
41 1.26V 41
1.64V
42 2.52V 42
1.1V
43 0V 43 1.7V
0V
44 44 2.5V
1.26V
45 45 1.6V
1.26V
46 46 0V
1.26V
47 47 0V
48 0V 48
1.93V
49
1V
50 0.9V
IC202
PIN
VOLTAGE
IC351
NO.
1
PIN
2.5V
VOLTAGE
NO.
2
1.23V
3 1
1.35V
0V
4 2
2.37V 0V
5 3
1.71V 2.35V
6 4
NC 0V
7 5
0.9V 0V
8 6
1.76V 2.35V
9 7
0.9V
0V
10 8
0.9V 0.91V
11 9
0.58V 2.5V
12 10
2.5V 0V
13 11
0V 0.91V
14 12
0.5V 2.35V
15 0.79V 13 0V
16 1.93V 14 4.54V
17
0.93V
18
1.26V
19
1.1V
IC402
20 1.78V
21 2.05V
PIN
VOLTAGE
NO.
22 1.63V
23 1.65V 1
2.35V
24 0V 2
0V
3
–
4
–
5
0V
6
0V
7
0V
8
2.35V
• The numbers 1 to 18
7
IC200
PIN PIN
VOLTAGE VOLTAGE
NO. NO.
51 1
1V
52 2
0V
53 3
0V
54 4
0V
55 5
0V
56 6
2V
57 7
0V
58 8
0V
59 9
0V
60 10
0V
61 11
0.8V
62 12
2V
63 13
0V
64 14
0.9V
65 15
0.79V
66 16
1.46V
67 17
1V
68 18
2V
69 19
0V
70 20
1V
71 21
1V
72 22
0V
73 23
0V
74 24
0V
75 25
1V
76 26
1V
77 27
1V
78 28
2V
79 0V 29
80 2V 30
81 31
1V
82 32
2V
83 33
0V
84 34
0V
85 35
1V
86 2V 36
87 2V 37
88 0V 38
89
2.33V 39
90 40
1.24V
91 41
1.46V
92 42
0V
93 0.1V 43
94 0.35V 44
95 0V 45
96 1.56V 46
97 0.25V 47
98 48
2.28V
99 49
2.34V
100 0V 50
Preform the measurement on
the IC401 pin 37 in the TEST
mode with GND short-circuited.
(LCD is in "TEST" state.)
IC404
PIN
VOLTAGE
NO.
1
2
3
4
5
IC431
PIN
VOLTAGE
NO.
1
2
3
4
IC871
PIN
VOLTAGE
NO.
1
2
3
4
5
are waveform numbers shown in page 40.
8 9
Figure 33 SCHEMATIC DIAGRAM (4/4)
IC401
PIN PIN
VOLTAGE
NO. NO.
51 1
0V 2.35V
52 2
2.48V 0V
53 3
0V 2.35V
54 4
2.33V 0V
55 5
NC 2.33V
56 6
0V 0V
57 7
0V 2.35V
58 8
0V 2.35V
59 9
0V 0.3V
60 10
2.35V 2.35V
61 11
0V 2.35V
62 12
2.35V 2.27V
63 13
2.35V 2.35V
64 14
2.35V 2.35V
65 15
– 2.35V
66 16
0V 1.1V
67 17
2.35V 1.1V
68 18
0V 0V
69 19
2.35V 2.34V
70 20
0V 0V
71 21
2.35V 0V
72 22
2.35V 2.24V
73 23
0V 2.24V
74 24
– –
75
– 2.35V
76
– 2V
77
– 2.35V
78
– 2.35V
– 79 0V
PIN
NO.
– 80 1.55V
81 1
0V 1.48V
82 2
0V 2.12V
83 3
2.14V 2.34V
84 4
2.5V 2.34V
85 5
2.5V 1.47V
0V 86 0V 6
0V 87 0V 7
2.35V 88 0V 8
89
2.35V 0V 9
90 10
2.35V 0V
91 11
0V 0V
92 12
2V 2.34V
0V 93 0V 13
0V 94 2V 14
0V 95 2.35V 15
2.35V 96 0V 16
0V 97 0V 17
98 18
2V 2.25V
99 19
0V 2.35V
0V 100 2.35V 20
21
22
23
24
25
26
27
28
29
30
0.22V 31
0.22V
32
0V
33
2.33V
34
2.5V
35
36
PIN
2.35V NO.
2.35V
1
0V 2
0V 3
4
5
6
7
8
9
0V
10
0V
0V
4.5V
6.1V
10
– 33 –
MD-MS722/C/W/MS721W
IC501 IC701
PIN
VOLTAGE VOLTAGE
NO.
1
2.5V 0V
2
2.5V 0V
3
0V 0V
4
0V 0V
5
0V 0V
6
0V 0V
7
0V 0V
8
0V 0V
9
1V 0V
10
1V 0V
11
1V 0V
12
0V 0V
0V 13 0V
14
2.5V 0V
15
0V 0V
16
0V 0V
17
0V –2.65V
18
0V 0V
19
0V 0V
0V 20 2.51V
0V 21 0.8V
22
0V 0V
23
2.5V 0V
24
2.5V 0V
IC601 IC703
PIN
VOLTAGE VOLTAGE
NO.
1
0V 0V
2
1V 0V
3
2.34V 0V
4
0V 0V
5
4.86V 0V
6
0V 0V
7
0V 0V
8
0V 0.95V
9
4.86V 0V
10
4.86V 0V
11
0V 0V
12
0V 0V
13
0V 2.35V
14
4.86V 0V
15
0V 0V
0V 16 0V
0V 17 –2.65V
18
0V 0V
19
0V 0V
20
0V 2.51V
21
0V 0.83V
0V 22 0V
4.86V 23 0V
0V 24 0V
0V
0V
4.86V
IC771
4.86V
0V
PIN
VOLTAGE
NO.
0V
0V 1
1.26V
4.86V 2
0V
0V
3
0V
0V
4
2.5V
2.5V
5
2.8V
10.3V
IC801
IC651
PIN
VOLTAGE
NO.
VOLTAGE
1
0V
2
2.8V 0.24V
3
0V 0V
4
0V 0V
5
0V 0.73V
6
0V 0.73V
0V
–
0V
0V
0V
11
IC820
PIN
VOLTAGE
NO.
1
1.25V
2
1.2V
3
0.96V
4
1V
5
0.95V
6
0V
7
3.55V
8
4.8V
9
2.47V
10
0.4V
11
1V
12
1V
IC841
PIN
VOLTAGE
NO.
1
0V
2
4.96V
3
4.92V
4
0V
5
2.35V
IC842
PIN
VOLTAGE
NO.
1
4.88V
2
4.88V
3
4.93V
4
0V
5
0V
6
0V
7
4.5V
8
4.93V
IC850
PIN
VOLTAGE
NO.
1
1.25V
2
0.9V
3
1.22V
4
1.2V
5
1.17V
6
0V
7
0.64V
8
4.8V
9
0V
10
0.4V
11
1V
12
1V
IC901
PIN
VOLTAGE
NO.
1
0V
2
0V
3
0V
4
0V
5
0V
6
0V
7
1V
8
2V
9
2V
10
0V
11
2.5V
12
0.67V
13
0V
14 2.34V
15
0V
16
2.5V
17
0.57V
18
0V
19 0V
20 0V
12