BBK MA-900S Schematics 4MA900S3-1
F
E
D
C
B
A
更 改数 量 更改单号 签 名日 期
1
23
设 计审 核
From Trans.
XS1
3PIN
1
2
3
VD110
1N4004
C100
224
C101
224
FL100
T4AL250V
FL101
T4AL250V
VD109
1N4004
Vs
标 准 化
+5DV
3.3V
V100
C145
R107
4.7K
R106
4.7K
R188
4.7K
R187
10K
R104
4.7K
9014
103
C113
C143
C146
102
R184
330
G100
30P
4M
30P
R109
220
220
R108
C114
102
批 准
R103
22K
VD111
R105
18K
TC107
4.7u/50V
+5DV
MA-900S3
P_SM
功放板原理图
4
XP106
P_IN
P_IN
11
-5V
10
+5V
9
GND
8
L
7
R
6
SL
CON11
5
GND
4
SR
3
C
2
SW
1
第 张共 张
广东步步高电子工业有限公司
BBK
5
版次：
6
-5V
+5V
R122
R123
100K
R124
100K
R125
100K
R126
100K
R127
100K
100K
R129
68K
R130
68K
C102
103
C104
103
C106
103
TC108
10u/16V
TC109
10u/16V
TC110
10u/16V
TC111
10u/16V
TC112
10u/16V
TC113
10u/16V
R128
68K
VD100
RL254
VD102
RL254
VD104
RL254
VD101
RL254
VD103
RL254
VD105
RL254
C103
103
C105
103
C107
103
TC100
4700u/25V
TC101
4700u/25V
TC104
4700u/25V
C109
104
C110
104
C108
104
A+18V
A-18V
B+18V
R111
220/0.5W
R186
220/0.5W
1
R100
220/0.5W
VD106
R101
220/0.5W
Vin
5.1V
VD107
5.1V
2
GND
Vout
TC102
470u/16V
TC103
470u/16V
N1007809
3
+5DV
R185
330
220
C117
103
330
330
10K
N102
PT2322
C122
103
R110
10
C154
104
P_IN
+5DV
R133
6.2K
C118
333
RCBAS1_FR
RCBAS2_FR
GND
SDA
SCL
OUT_FR
OUT_SR
OUT_SUB
VCC
OUT_CT
OUT_SL
OUT_FL
RCBAS2_FL
C123
333
R135
6.2K
TC115
22u/25V
C119
333
C124
333
R136
100K
R112
R113
R114
R115
R180 4.7K
+9V1
28
27
26
25
24
23
22
21
20
+9V1
19
18
17
16
15
R137
51K
C126
103
+5DV
R119
4.7K
P_A
P_B
P_STBY
P_X
DGND
L100
100uH
P_RE
MUTE1
330
330
330
330
L
R
SL
SR
C
SW
R138
150K
C127
R139
6
100K
5
C147
223
RST/Vpp
(RXD)P3.0
(TXD)P3.1
XTAL2
XTAL1
(INT0)P3.2
(INT1)P3.3
(T0)P3.4
(T1)P3.5
GND
AT89C2051
C125
103
R131
51K
2
3
8 4
N101
P1.1(AIN1)
P1.0(AIN0)
C115
222
TC114
47u/25V
-5V
N103A
4558
+5V
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P3.7
C120
222
20
Vcc
19
18
17
16
15
R116
R117
14
13
12
11
R132
3.3K
C116
103
1
RCMID2
2
RCMID1
3
CTRE_FR
4
IN_FR
5
IN_SR
6
IN_SUB
7
VREF
8
GND
9
IN_CT
10
IN_SL
11
IN_FL
12
CTRE_FL
13
RCMID1_FL
RCMID2_FL14RCBAS1_FL
R134
3.3K
1
R120
R121
C121
103
1
2
3
4
5
6
7
8
9
10
L
R
SL
SR
C
SW
TC105
220u/16V
XS105
CON11
TC116
10u/16V
TC117
10u/16V
TC118
10u/16V
TC119
10u/16V
TC120
10u/16V
TC121
1u/16V
152
+9V
C111
473
C112
473
+5V
-5V
C144
473
+9V1
R102
75/0.5W
VD108
5.1V
TC122
10u/16V
N106
47K
R162
47K
TDA7377 TDA7370、
C132
224
C133
224
C134
224
C135
224
TC123
47u/16V
4
5
12
11
6
R155
L
220
R156
SR
+5DV+9V
TC106
47u/25V
220
R157
R
220
R158
SL
220
R159
47K
R160
47K
R161
R163
100K
7
S-B
IN1
IN2
IN3
IN4
SVR
PG8SG9CD
A+18V
3
Vcc13Vcc
OUT1
OUT2
OUT3
OUT4
1
2
15
14
C136
473
TC124
330u/25V
TC125
330u/25V
TC126
330u/25V
TC127
330u/25V
P_SM
XP5
1
2
3
4
5
6
7
8
9
10
CON10
P_SM
GND
C
SR
To Sub-AMP Board
L
R
SL
1
2
10
1
2
3
4
5
6
7
8
9
10
11
N103B
4558
P_SCAN
R141
100K
R149
100K
7
R146
100K
R152
100K
R142
R143
10K
R145
1K
1K
R147
9.1K
R150
12K
R153
12K
R140
220
R164
C
22K
N104B
5
4558
R144
84
R148
R154
8 4
15K
12K
R151
33K
33K
C128
+5V
-5V
C129
47P
C130
47P
C131
47P
-5V
+5V
47P
N104A
4558
N105B
4558
N105A
4558
7
1
7
1
6
3
2
6
5
2
3
MUTE2
MUTE1
TC138
10u/16V
C137
151
R181
10K
R118
1K
2N5401
V101
R165
39K
MUTE2
TC132
2.2u/16V
R166
22K
V104
S8050
R182
R172
1.5K
1K
R171
22K
R173
22K
R176
22K
TC128
2.2u/16V
C148
151
C149
151
TC133
22u/25V
TC131
22u/25V
R178
1.5K
N107
TDA2003
1
2
TC129
470u/16V
1
2
1
2
B+18V
+
-
+
-
R174
22K
+
-
53
R167
47
53
53
R177
22K
C139
N108
TDA2050
N109
TDA2050
C138
473
R169
TC130
330u/25V
R168
R170
220/1W
2.2
C140
104
10/0.5W
4
33P
3
45
A+18V
TC134
C150
R179
VS
100u/25V
TC136
100u/25V
TC135
100u/25V
TC137
100u/25V
A-18V
XP7
1
2
3
4
CON4
A+18V
A-18V
473
C152
473
To Sub-AMP Board
Vs
GND
C151
473
C153
473
6
4
R175
2.2/0.5W
C141
105
4
2.2/0.5W
C142
105
F
E
D
C
B
A
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