Read Sony BM-21 / BM-23 (serv.man3) Service Manual online
14
14
BM-21/23
BM-21/23
4-4. SCHEMATIC DIAGRAM – AUDIO BOARD (2/4) –
•
See page 18 for IC Block Diagrams.
R119
R121
VR101
R125
R132
R126
R144
R145
R161
R160
R151
R124
Q105
R159
TP29
TP51
TP52
TP30
TP39
TP40
TP41
TP42
TP43
TP44
TP45
S101(4/4)
R133
R123
R111
R117
JR101
R135
R136
R171
R169
R140
R138
TP72
R168
TP68
TP63
TP69
TP67
TP71
TP59
TP60
TP70
TP75
JR901
R120
FB902
FB901
R141
R152
C136
R118
R142
R134
R150
C140
C151
C127
C123
C106
C115
C118
C119
C125
C129
C138
C122
C153
C157
C159
C113
C121
C126
C131
C152
C156
C158
C160
R127
Q106
Q104
Q102
Q103
R122
C116
C141
C144
Q107
Q111
Q112
JR151
R139
R130
IC102
C137
C139
IC103
S102
Q109
C150
C146
C147
Q110
J102
SP501
S402
CN102
IC101
S501
R158
R131
C128
330k
470
10K /15A
10k
1k
3.3k
47k
270
100k
10k
4.7k
22
UN5215
180
47k
2.2k
39k
330
0
0
10k
100k
22k
22k
0
22
0
1k
FB
FB
390k
18
0.1
27k
47k
470K
2.2k
22
4V
4V
100
4V
2.2
10V
10V
1
0.01
0.0047
0.001
1
0.001
0.1
0.1
1
0.1
100p
0.1
0.22
35V
22
4V
4.7
10V
10V
47
4V
22
4V
4V
1 10V
0.1
22
4V
4V
2.2
2SB1218A-R-TX
2SB1218A-R-TX
2SD1819A-R-TX
2SD1819A-R-TX
2.2k
22
4V
220
4V
0.01
UN5214-TX
UN5214-TX
UN5214-TX
0
100k
100k
MM3111AWLE
0
1
10V
MM3111AWLE
(POWER)
2SA1362-G-EL
0.001
0.47
220
4V
2SD1819A-R-TX
SPEAKER
(FF/BACK SPACE)
CX
A2500N
-T4
3.3k
3.3k
100
4V
C112
0.01
SUPPLEMENT-2
Page 13
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SUPPLEMENT-2
Page 16
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