Sony BM-21 Service Manual page 40

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