Pioneer XR-A550MD Service Manual page 24

XR-A550MD
QQ
3 7 63 1515 0
Voltages of PWB-A (MD MAIN ASSY)
Q1801 IC1907
PIN PIN PIN
NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE
E 1 1
5V 2.8V
C 2 2
5V 2.6V
B 3 3
43V 4.9V
4 4
2.6V
Q1802
5 5
1.6V
PIN 6 6
0V
NO. VOLTAGE
7 7
0V
E
0V
8 8
4.9V
C
0V
9 9
0V
B
0.15V
10 10
2.2V
11 11
5V
Q1803
12 12
5V
PIN
NO. VOLTAGE 13 13
0V
14 14
3.2V
E
0V
15 15
3.1V
C
0V
16 16
5V
B
3.1V
17
Q1807
IC1990
PIN
NO. VOLTAGE
PIN
NO. VOLTAGE
E
3.95V
1
1.45V 18
C
3.2V
2 19
1.7V
B
3.3V
3
1.45V 20
4
Q1820 1.7V 21
5
1.45V 22
PIN
NO. VOLTAGE
6
1.7V 23
7 24
E 0V
3.2V
8
C 1.7V 25
3.18V
9
B 1.45V 26
2.4V
10
1.37V 27
Q1821
11
1.7V 28
PIN
12 29
1.37V
NO. VOLTAGE
13
1.7V 30
E
0V
14
3.17V 31
C
0V
32
B
3.08V
33
34
Q1822
35
PIN
NO. VOLTAGE
36
37
E
0V
TE
L 13942296513 38
C
0V
39
B
0.1V
40
41
Q1451
42
PIN
NO. VOLTAGE
43
44
E
0V IC1202
45
C
3.18V
PIN
NO. VOLTAGE
46
B
0.1V
47
1
1.1V
Q1401
48
2
1.1V
PIN
3
3V
NO. VOLTAGE
4
2V
E
3.2V
5
1.5V
C
3.2V
6
1.8V
B
0V
7
0.8V
8
2.4V
Q1402
9
1.2V
PIN PIN
NO. VOLTAGE
NO. VOLTAGE
10
3.2V
11
1.2V
E E
0V
12
2.5V
C
0V C
13
1.3V
B
2.3V B
14
1.7V
Q1403 15
1.3V
16
2.2V
PIN PIN
NO. VOLTAGE
NO. VOLTAGE
17
2.4V
18
E E
3.18V 1.2V
C 19 C
0V 1.1V
B 20 B
3.15V 0V
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IC1101 IC1201
PIN PIN
NO. VOLTAGE NO. VOLTAGE
1 51
0.7V 1.48V 58V
2 52
0.7V 0V 0V
3 53
0.7V 1.6V 0V
4 54
0.7V 0V 58V
5 55
1.6V 1.36V 0V
6 56
1.6V 1.77V 0V
7 57
0.7V 1.6V 3.2V
8 58
1.6V 1.36V 3.2V
9 59
1.6V 1.77V 3.2V
10 60
1.6V 1.25V 3.17V
11 61
1.6V 1.6V 0V
12 62
1.6V
3.17V 3.17V
13 63
3.2V 0V 0V
14 64
3.2V 0V 1.3V
15 65
0V 0V 1.3V
16 66
Groove:3.2V 0V DIC input:1.58V
17
Pit:0V
1.45V Other:0V
18 67
Low-reflectance: 1.56V 1.58V
19 68
0V 1.62V 3.17V
20 69
High-reflectance: 1.7V 0V
21 70
3.2V
1.5V 1.5V
22 71
0V
1.63V 1.55V
23 72
0V 1.53V 1.5V
24 73
1.45V 1.8V 0V
25 74
3.2V 1.4V 1V
26 75
0V
1.2V 1.55V
27 76
0V
2.5V 1.8V
28 77
3.2V 0.8V 1.56V
29 78
1.78V 1.8V 0V
30 79
1.78V
1.4V 0V
31 80
1.35V
3.2V 3.16V
32 81
1.36V
1.2V 0V
33 82
1.6V 2.5V 0V
34 83
1.6V 1.3V 0V
35 84
1.6V
1.7V 1.5V
36 85
1.6V
1.3V 1.5V
37 86
1.6V
2.2V 3.1V
38 87
0V 0V 3.17V
39 88
1.6V 2.4V 0V
40 89
1.6V
1.2V 3.17V
41 90
0.3V
1.1V 0.5V
42 91
1.6V
1.5V 0.6V
43 92
1.6V 2V 0.4V
44 93
1.6V
3V 0.4V
45 94
1.6V
1.1V 0.4V
46 95
3.2V
1.1V 0.9V
47 96
0V
0V 0.7V
48 97
1V 3V 0.8V
49 98
1.6V
1.56V 3.16V
1.6V 50 99
PLAY:0V 3.15V
0.7V
REC:1.5V 100 0V
0.7V
IC1801
PIN
NO. VOLTAGE
1
0V
2
44V
Q1404
3
3.2V
4
3.1V
5
0V
0V
3.15V
IC1901
2.1V
PIN
NO. VOLTAGE
Q1601
1
5.5V
2
1.6V
3
0V
5.45V
4
4.4V 2.8V
5
4.8V 5.5V
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IC1401
PIN PIN
NO. VOLTAGE NO. VOLTAGE
1 51
0V 0V
2 52
0V 0V
3 53
0.2V 0V
4 54
3.2V 0V
5 55
0V 0V
6 56
0V 0V
7 57
3.1V 0V
8 58
0V 0V
9 59
0V 3.2V
10 60
0V 0V
11 61
0V 3.2V
12 62
3.18V 3.2V
13 63
144V 0V
14 64
0V 0V
15 65
1.5V 3.2V
16 66
3.2V 3.2V
17 67
3.2V 3.2V
18 68
3.1V 0V
19 69
0V 0V
20 70
0V 3.1V
21 71
0V 0V
22 72
3.15V 3.1V
23 73
3.2V 97A:0V
24
0V 97B:3.2V
25 74
3.2V 0V
26 75
3.2V 3.2V
27 76
0V 3.2V
28 77
0V 0V
29 78
2V 0V
30 79
3.2V 0V
31 80
0V 3.15V
32 81
3.2V 0V
33 82
0V 0V
34 83
0.8V 3.2V
35 84
2.2V 3.2V
36 85
0.2V 3.2V
37 86
2.3V 3.2V
38 87
0V 3.2V
39 88
PLAY:3.15V 3.2V
89
REC:0V 1.7V
40 90
0V 1.8V
Q Q
41 3 91 6 7 1 3
0V 1.8V
42 92
0V 1.4V
43 93
3.2V Low-reflectance:
44
0V 2.2V
45
0V High-reflectance:
46
3.15V 0.1V
47 94
0V 3.2V
48 95
0V 3.2V
49 96
0V 0V
50
0V 97 2V
98 3.2V
99
3.2V
100
0V
NOTES FOR SCHEMATIC DIAGRAMS
• Resistance values unless otherwise specified are in Ω.
"K" means 1000Ω, and "M" means 1000kΩ.
• Capacitors unless otherwise specified are in µF.
"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 (
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.
2 9 9 4 2 8
Q1251
IC1601
PIN PIN PIN
PIN
NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE
VOLTAGE
NO.
D
4.4V
1
1.25V
S
1.4V
2
4V
G
2.6V
3
1.5V
4
5.5V
5
5.5V
Q1252
6
1.5V
PIN
NO. VOLTAGE
7
5V
8
2.7V
D
4.4V
9
2.8V
S
1.4V
10
0V
G
2.6V
11
0V
12
2.7V
Q1253
13
2.76V
14 PIN
1.6V
NO. VOLTAGE
15
1.6V
D
15V
16
1.6V
S 0V
17
3.15V
G
18 2.6V
3.15V
19 PIN
0V
NO. VOLTAGE
20
1.6V
Q1254
21
1.6V
PIN
NO. VOLTAGE
22
1.6V
23
1.23V
D
15V
24
1.23V
S
0V
25
1.6V
G
2.6V
26
1.6V
PIN
NO. VOLTAGE
27
1.62V
28
2.7V
29
2.8V
30
2.7V
31
2.7V
32
0V
IC1701
33
0V
PIN
PIN
NO. VOLTAGE
NO. VOLTAGE
34
3.0V
35
2.4V
1
0V
36
0V
2
3.2V
37
1.64V
3
1.4V
38
5.5V
4
1.5V
39
5.5V
5 1.4V
40
1.64V
6
0V
PIN
41
1.68V NO. VOLTAGE
7
3.2V
1 5 0 5 8 2 9 9 4
42
1.68V
8
0V
9
0V
10 3.2V
11
0V
12
IC1251 1.5V
13
3.17V
PIN
NO. VOLTAGE
14
3.17V
1 15 3.17V
2.6V
2 16
2.6V 1.55V
17
3 3.17V
0.1V
18
4 0V
2.6V
19
5 1V
2.6V
6 20
0.1V 0V
7 21
0V 0V
22
8 0V
1.56V
23
9 3.2V
0.1V
24
10 1.57V
2.6V
11 25
1.56V 3.2V
12 26
1.57V
0.1V
27
13 0V
2.6V
28
14 1.6V
5.2V
mark) are
m
co
9 9
IC1916
1 1
1.58V
2 2
3.2V
3 3
1.58V
4 4
3.2V
5 5
DIG input:2.2V
Other:0V
6 6
DIG input:1.58V
Other:0V
7
1.55V
8
2.2V
9 9
3.2V
10 10
3.2V
11 11
97A:3.2V
97B:1V
12
97A:3.2V
97A:0.9V
Q1804
E 5.4V
C
5.4V
B
4.8V
Q1805
E
0V
C
0.7V
B
3.1V
Q1701
E
3.2V
C
5.4V
B
3.85V
IC1802
2 8 9 9
1
2.46V
2
0V
3
3.85V
IC1402
PIN
NO. VOLTAGE
1 0V
2
3.2V
3
3.2V
4
3.2V
5
0V
6
0V
7
0V
8
0V