XR-A550MD
24
5V
5V
43V
B
C
E
PIN
NO. VOLTAGE
Q1801
0V
0V
0.15V
B
C
E
PIN
NO. VOLTAGE
Q1802
0V
0V
3.1V
B
C
E
PIN
NO. VOLTAGE
Q1803
3.95V
3.2V
3.3V
B
C
E
PIN
NO. VOLTAGE
Q1807
3.2V
3.18V
2.4V
B
C
E
PIN
NO. VOLTAGE
Q1820
0V
0V
3.08V
B
C
E
PIN
NO. VOLTAGE
Q1821
0V
0V
0.1V
B
C
E
PIN
NO. VOLTAGE
Q1822
0V
3.18V
0.1V
B
C
E
PIN
NO. VOLTAGE
Q1451
3.2V
3.2V
0V
B
C
E
PIN
NO. VOLTAGE
Q1401
PIN
NO. VOLTAGE
Q1402
PIN
NO. VOLTAGE
Q1404
5.5V
1.6V
0V
2.8V
5.5V
5
4
3
2
1
PIN
NO. VOLTAGE
IC1901
0V
44V
3.2V
3.1V
0V
5
4
3
2
1
PIN
NO. VOLTAGE
IC1801
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC1907
2.8V
2.6V
4.9V
2.6V
1.6V
0V
0V
4.9V
0V
2.2V
5V
5V
0V
3.2V
3.1V
5V
9
8
7
6
5
4
3
2
1
14
13
12
11
10
PIN
NO. VOLTAGE
IC1990
1.45V
1.7V
1.45V
1.7V
1.45V
1.7V
0V
1.7V
1.45V
1.37V
1.7V
1.37V
1.7V
3.17V
0.7V
0.7V
0.7V
0.7V
1.6V
1.6V
0.7V
1.6V
1.6V
1.6V
1.6V
1.6V
3.2V
3.2V
0V
Groove:3.2V
Pit:0V
Low-reflectance:
0V
High-reflectance:
3.2V
0V
0V
1.45V
3.2V
0V
0V
3.2V
1.78V
1.78V
1.35V
1.36V
1.6V
1.6V
1.6V
1.6V
1.6V
0V
1.6V
1.6V
0.3V
1.6V
1.6V
1.6V
1.6V
3.2V
0V
1V
1.6V
1.6V
0.7V
0.7V
9
8
7
6
5
4
3
2
1
17
16
15
14
13
12
11
10
48
47
PIN
NO. VOLTAGE
IC1101
29
28
27
26
25
24
23
22
21
20
19
18
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
1.48V
0V
1.6V
0V
1.36V
1.77V
1.6V
1.36V
1.77V
1.25V
1.6V
3.17V
0V
0V
0V
0V
1.45V
1.56V
1.62V
1.7V
1.5V
1.63V
1.53V
1.8V
1.4V
1.2V
2.5V
0.8V
1.8V
1.4V
3.2V
1.2V
2.5V
1.3V
1.7V
1.3V
2.2V
0V
2.4V
1.2V
1.1V
1.5V
2V
3V
1.1V
1.1V
0V
3V
1.56V
PLAY:0V
REC:1.5V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
PIN
NO. VOLTAGE
50
IC1201
58V
0V
0V
58V
0V
0V
3.2V
3.2V
3.2V
3.17V
0V
3.17V
0V
1.3V
1.3V
DIC input:1.58V
Other:0V
1.58V
3.17V
0V
1.5V
1.55V
1.5V
0V
1V
1.55V
1.8V
1.56V
0V
0V
3.16V
0V
0V
0V
1.5V
1.5V
3.1V
3.17V
0V
3.17V
0.5V
0.6V
0.4V
0.4V
0.4V
0.9V
0.7V
0.8V
3.16V
3.15V
0V
59
58
57
56
55
54
53
52
51
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
PIN
NO. VOLTAGE
99
100
9
8
7
6
5
4
3
2
1
10
PIN
NO. VOLTAGE
IC1202
1.1V
1.1V
3V
2V
1.5V
1.8V
0.8V
2.4V
1.2V
3.2V
30
29
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
9
8
7
6
5
4
3
2
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC1401
0V
0V
0.2V
3.2V
0V
0V
3.1V
0V
0V
0V
0V
3.18V
144V
0V
1.5V
3.2V
3.2V
3.1V
0V
0V
0V
3.15V
3.2V
0V
3.2V
3.2V
0V
0V
2V
3.2V
0V
3.2V
0V
0.8V
2.2V
0.2V
2.3V
0V
PLAY:3.15V
REC:0V
0V
0V
0V
3.2V
0V
0V
3.15V
0V
0V
0V
0V
79
78
99
98
97
96
95
94
93
92
91
90
88
87
86
85
84
83
82
81
80
100
89
59
58
57
56
55
54
53
52
51
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
PIN
NO. VOLTAGE
0V
0V
0V
0V
0V
0V
0V
0V
3.2V
0V
3.2V
3.2V
0V
0V
3.2V
3.2V
3.2V
0V
0V
3.1V
0V
3.1V
97A:0V
97B:3.2V
0V
3.2V
3.2V
0V
0V
0V
3.15V
0V
0V
3.2V
3.2V
3.2V
3.2V
3.2V
3.2V
1.7V
1.8V
1.8V
1.4V
Low-reflectance:
2.2V
High-reflectance:
0.1V
3.2V
3.2V
0V
2V
3.2V
3.2V
0V
1.25V
4V
1.5V
5.5V
5.5V
1.5V
5V
2.7V
2.8V
0V
0V
2.7V
2.76V
1.6V
1.6V
1.6V
3.15V
3.15V
0V
1.6V
1.6V
1.6V
1.23V
1.23V
1.6V
1.6V
1.62V
2.7V
2.8V
2.7V
2.7V
0V
0V
3.0V
2.4V
0V
1.64V
5.5V
5.5V
1.64V
1.68V
1.68V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
42
41
40
39
38
37
36
35
34
33
32
31
VOLTAGE
IC1601
PIN
NO.
4.4V
1.4V
2.6V
G
S
D
PIN
NO. VOLTAGE
Q1251
9
8
7
6
5
4
3
2
1
14
13
12
11
10
PIN
NO. VOLTAGE
IC1251
2.6V
2.6V
0.1V
2.6V
2.6V
0.1V
0V
1.56V
0.1V
2.6V
1.56V
0.1V
2.6V
5.2V
4.4V
1.4V
2.6V
G
S
D
PIN
NO. VOLTAGE
Q1252
15V
0V
2.6V
G
S
D
PIN
NO. VOLTAGE
Q1253
15V
0V
2.6V
G
S
D
PIN
NO. VOLTAGE
Q1254
5.4V
5.4V
4.8V
B
C
E
PIN
NO. VOLTAGE
Q1804
0V
0.7V
3.1V
B
C
E
PIN
NO. VOLTAGE
Q1805
3.2V
5.4V
3.85V
B
C
E
PIN
NO. VOLTAGE
Q1701
9
8
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC1916
1.58V
3.2V
1.58V
3.2V
DIG input:2.2V
Other:0V
DIG input:1.58V
Other:0V
1.55V
2.2V
3.2V
3.2V
97A:3.2V
97B:1V
97A:3.2V
97A:0.9V
9
7
6
5
4
3
2
1
11
10
PIN
NO. VOLTAGE
2.46V
0V
3.85V
3
2
1
PIN
NO. VOLTAGE
IC1802
0V
3.2V
1.4V
1.5V
1.4V
0V
3.2V
0V
0V
3.2V
0V
1.5V
3.17V
3.17V
3.17V
1.55V
3.17V
0V
1V
0V
0V
0V
3.2V
1.57V
3.2V
1.57V
0V
1.6V
9
8
7
6
5
4
3
2
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC1701
0V
3.2V
3.2V
3.2V
0V
0V
0V
0V
8
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC1402
Voltages of PWB-A (MD MAIN ASSY)
NOTES FOR SCHEMATIC DIAGRAMS
•
Resistance values unless otherwise specified are in
Ω
.
"K" means 1000
Ω
, and "M" means 1000k
Ω
.
•
Capacitors unless otherwise specified are in
µ
F.
"P" is an abbreviation for pF.
•
Capacitors indicated as (CH), (RH), (TH), (UJ), (CK),
etc. are ceramic tempetature compensation types.
Capacitors indicated as (ML) are Mylar type.
•
For electrolytic capacitors, indication is in the order of
capacity and voltage resistance.
•
Parts indicated with the mark ( mark) are
important for safety reasons. Be sure to use the
designated parts for replacement in order to ensure
safety and performance.
•
Voltage value indicated in each part is without signal,
as measured with a digital multimeter.
•
The schematic and PCB diagrams are subject to
change for improved performance. Thus, they may be
slightly different, depending on the set.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299