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Model
SA-PM250EB SA-PM250EC SA-PM250EE SA-PM250EF SA-PM250EG (serv.man2)
Pages
74
Size
4.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / CD STEREO SYSTEM
File
sa-pm250eb-sa-pm250ec-sa-pm250ee-sa-pm250ef-sa-pm2.pdf
Date
PREV: Panasonic SA-PM250EB / SA-PM250EC / SA-PM250EE / SA-PM250EF / SA-PM250EG Service Manual / Supplement

Panasonic SA-PM250EB / SA-PM250EC / SA-PM250EE / SA-PM250EF / SA-PM250EG (serv.man2) Service Manual ▷ View online

61
15 Voltage and Waveform Measurement
15.1. Voltage Measurement
Note:
• Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
• Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point because it
may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
15.1.1.
Main P.C.B.  (1/3)
REF NO.
MODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CD PLAY
3.3
0
1.7
1.7
0.9
0
3.3
3.3
3.3
3.3
0
1.5
3.3
0
0
1.4
1.4
0
1.1
3.3
STANDBY
3.3
0
1.7
1.7
0.9
0
3.3
3.3
3.3
3.3
0
1.5
3.3
0
0
1.4
1.4
0
1.1
3.3
REF NO.
MODE
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
CD PLAY
0
3.3
3.3
13.3
8.4
16.7
0
0
13.3
8.4
8.4
13.3
0
0
16.7
8.4
13.3
5.6
0
0
STANDBY
0
3.3
3.3
13.3
8.4
16.7
0
0
13.3
8.4
8.4
13.3
0
0
16.7
8.4
13.3
5.6
0
0
REF NO.
MODE
41
42
43
44
45
46
47
48
CD PLAY
0
0
3.3
3.3
3.3
3.3
1.7
1.7
STANDBY
0
0
3.3
3.3
3.3
3.3
1.7
1.7
REF NO.
MODE
1
2
3
4
5
6
7
8
POWER
5
5
3.3
1
0
0
0
0
STANDBY
5
5
3.3
1
0
0
0
0
REF NO.
MODE
1
2
3
POWER
0
3.3
5.3
STANDBY
0
3.3
5.3
REF NO.
MODE
1
2
3
4
5
POWER
9.3
0
16.7
2.5
2.9
STANDBY
9.3
0
16.7
2.5
2.9
REF NO.
MODE
1
2
3
4
POWER
3
0
1.6
3
STANDBY
3
0
1.6
3
REF NO.
MODE
1
2
3
POWER
16.7
0
5.0
STANDBY
16.7
0
5.0
REF NO.
MODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CD PLAY
1.7
5.2
2.9
1.7
2.9
0
0
5.3
0
0
2.8
2.6
2.5
2.8
2.7
2.6
3.2
2.1
5.2
2.9
STANDBY
1.7
5.2
2.9
1.7
2.9
0
0
5.3
0
0
2.8
2.6
2.5
2.8
2.7
2.6
3.2
2.1
5.2
2.9
REF NO.
MODE
21
22
23
24
25
26
27
28
29
30
CD PLAY
1.5
0
1.8
5.2
5.2
1.7
1.7
3.3
0
0
STANDBY
1.5
0
1.8
5.2
5.2
1.7
1.7
3.3
0
0
IC400
IC400
IC5001
IC1108
IC1106
IC400
IC1102
SA-PM250EG/EC/EF/EB/EE MAIN P.C.B.
IC1103
IC1104
IC5001
62
15.1.2.
MAIN P.C.B. (2/3)
REF NO.
MODE
1
2
3
4
5
USB PLAY
3.2
0
3.3
5.3
5.3
STANDBY
3.2
0
3.3
5.3
5.3
REF NO.
MODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
POWER
3.3
0
3.3
3.3
3.3
0
3.3
3.3
3.3
3.2
3.3
0
3.3
3.3
3.3
0
3.3
1.6
0
0
STANDBY
3.3
0
3.3
3.3
3.3
0
3.3
3.3
3.3
3.2
3.3
0
3.3
3.3
3.3
0
3.3
1.6
0
0
REF NO.
MODE
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
POWER
2.7
0
0
3.2
3.3
3.3
3.3
3.3
0
0
3.3
3.3
1.6
1.6
1.5
0.9
1.6
1.3
0.7
1.2
STANDBY
2.7
0
0
3.2
3.3
3.3
3.3
3.3
0
0
3.3
3.3
1.6
1.6
1.5
0.9
1.6
1.3
0.7
1.2
REF NO.
MODE
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
POWER
0.4
0
1.7
1.7
1.7
2
0
0
3.3
1.8
1.8
1.7
0
1.7
1.7
0.2
2.1
1.7
1.7
1.7
STANDBY
0.4
0
1.7
1.7
1.7
2
0
0
3.3
1.8
1.8
1.7
0
1.7
1.7
0.2
2.1
1.7
1.7
1.7
REF NO.
MODE
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
POWER
1.8
1.7
1.7
2.1
1.7
0
1.7
1.7
1.7
1.7
0
0
3.3
0
0
0
3.2
3.3
3.3
0
STANDBY
1.8
1.7
1.7
2.1
1.7
0
1.7
1.7
1.7
1.7
0
0
3.3
0
0
0
3.2
3.3
3.3
0
REF NO.
MODE
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
POWER
0.8
1.7
1.7
3.2
0
3.3
1.7
3.3
3.3
0
0
1.6
0
3.3
1.5
3.3
0
0
0
0
STANDBY
0.8
1.7
1.7
3.2
0
3.3
1.7
3.3
3.3
0
0
1.6
0
3.3
1.5
3.3
0
0
0
0
REF NO.
MODE
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
POWER
1.7
3.3
0
0
3.2
3.3
3.2
3.3
0
0
3.2
3.3
0
0
0
0
0
3.3
3.3
3.3
STANDBY
1.7
3.3
0
0
3.2
3.3
3.2
3.3
0
0
3.2
3.3
0
0
0
0
0
3.3
3.3
3.3
REF NO.
MODE
121
122
123
124
125
126
127
128
POWER
0
0
0
1.7
1.5
1.9
1.4
1.4
STANDBY
0
0
0
1.7
1.5
1.9
1.4
1.4
REF NO.
MODE
1
2
3
4
5
POWER
3.3
3.3
0
0
1.8
STANDBY
3.3
3.3
0
0
1.8
REF NO.
MODE
1
2
3
4
5
6
7
8
POWER
3.3
1.7
3.3
0
0
0
3.3
3.3
STANDBY
3.3
1.7
3.3
0
0
0
3.3
3.3
REF NO.
MODE
1
2
3
4
5
6
7
8
POWER
0
0
0
0
3.3
3.3
0
3.3
STANDBY
REF NO.
MODE
1
2
3
4
POWER
3.1
0
4.6
5
STANDBY
3.1
0
4.6
5
SA-PM250EG/EC/EF/EB/EE MAIN P.C.B.
IC8001
IC8001
IC8003
IC8004
IC8100
IC6003
IC8001
IC8002
IC8001
IC8001
IC8001
IC8001
63
15.1.3.
MAIN P.C.B. (3/3), Panel P.C.B. & SMPS P.C.B.
REF NO.
MODE
1
2
3
4
5
6
7
8
E
C
B
E
C
B
E
C
B
POWER
19.0
19.0
19.0
3.6
19.0
19.0
19.0
19.0
8.4
16.5
8.4
8.4
16.5
8.4
16.7
0
16.6
STANDBY
19.0
19.0
19.0
3.6
19.0
19.0
19.0
19.0
8.4
16.5
8.4
8.4
16.5
8.4
16.7
0
16.6
REF NO.
MODE
E
C
B
E
C
B
1
2
3
4
5
6
E
C
B
POWER
0
3.3
0
2.9
1.9
2.2
0
0.5
3.3
3.3
2.7
0
0
0
3.2
STANDBY
0
3.3
0
2.9
1.9
2.2
0
0.5
3.3
3.3
2.7
0
0
0
3.2
REF NO.
MODE
E
C
B
POWER
0
3.2
0
STANDBY
0
3.2
0
REF NO.
MODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
POWER
2.7
3.3
0
3.2
0
2.9
3.3
0
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
STANDBY
2.7
3.3
0
3.2
0
2.9
3.3
0
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
REF NO.
MODE
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
POWER
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
STANDBY
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
REF NO.
MODE
41
42
43
44
POWER
1.5
1.5
1.5
1.5
STANDBY
1.5
1.5
1.5
1.5
REF NO.
MODE
E
C
B
POWER
0
0.1
3.3
STANDBY
0
0.1
3.3
REF NO.
MODE
1
2
3
4
5
6
7
8
POWER
0
22.3
0
1.1
320
320
320
320
STANDBY
0
22.3
0
1.1
320
320
320
320
REF NO.
MODE
1
2
3
4
POWER
0
0
14.6
2.5
STANDBY
0
0
14.6
2.5
REF NO.
MODE
1
2
3
4
5
6
7
8
POWER
10.5
16.7
5.3
0
0.9
0
3.2
0
STANDBY
10.5
16.7
5.3
0
0.9
0
3.2
0
REF NO.
MODE
E
C
B
E
C
B
E
C
B
POWER
0
0
0.6
14.6
0
14.7
0
14.5
0
STANDBY
0
0
0.6
14.6
0
14.7
0
14.5
0
IC1700
SA-PM250EG/EC/EF/EB/EE PANEL P.C.B.
IC900
SA-PM250EG/EC/EF/EB/EE MAIN P.C.B.
IC900
Q900
IC900
QR1102
Q1100
Q400
Q401
Q402
Q8000
QR1101
Q403
Q5002
SA-PM250EG/EC/EF/EB/EE SMPS P.C.B.
IC1701
IC1702
Q1700
Q1701
QR1700
64
15.2. Waveform Chart
WF No. IC400-25,30,31,36 (PLAY)
30Vp-p(1usec/div)
WF No. IC8001-124 (PLAY)
4Vp-p(10msec/div)
WF No. IC8001-125 (PLAY)
3.2Vp-p(20usec/div)
WF No. IC8001-128 (PLAY)
3.2Vp-p(50nsec/div)
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