BBK MA-970S Service Manual
R128
10K
R170
G100
4M
4.7K
C
P_LRM
P_SCM
N100
1
RST/Vpp
2
(RXD)P3.0
3
(TXD)P3.1
4
XTAL2
5
XTAL1
6
(INT0)P3.2
7
(INT1)P3.3
8
(T0)P3.4
(T1)P3.5
GND
P1.1(AIN1)
P1.0(AIN0)
AT89C2051
9
10
Vcc
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P3.7
20
19
18
17
16
15
R117
R119
14
R118
13
R120
12
11
R178
4.7K
+5V
100
+9V
D
10K
R129
+5V
R103
18K
3.3V
VD116
R102
C109
22K
R115
R116
4.7K
4.7K
100
4.7u/50V
R114
4.7K
V100
103
9014
C123
R169
10K
C124
30P
C125
30P
F
4-Oct-2005
张广胜
设 计审 核批 准
更 改更 改 单 号签 名日 期
FL100
T6.3AL 250V
123456
数 量
XS100
CON2
2
1
VD100 1N5404
VD101
VD102
VD103
VD111
1N4004
1N5404
1N5404
1N5404
C168
22u/50V
C100
标 准 化
X103
1
2
CON2
X102
1
2
X101
CON2
FL101
T2AL 250V
C126
2
1
472
E
R100
270/3W
270/1W
R101
C101
104/100V
4700u/35V
VD112 1N4148
R107
22K
R106
2.7K/0.25W
C169
1u/16V
+5V
+9V+22V
VD104
9.1V
C102
220u
C103
473
VD105
5.1V
C108
100u
C104
473
+22V
R138
R167
10K
R140
V105
S8050
MUTE1
270
C172
4.7u/50V
R127 100
R130
C186
C185
C184
C183 333
R131
102
102
102
L100
L
VD109
5.1V
R165
47K
47K
V106
9014C
CON2
42
R121
R104
R122
MA-970S 功放板
第 张共 张版次：
1
东莞市步步高视听电子有限公司
BBK
XS106
CON7
L
7
R
6
SL
5
GND
4
SR
3
C
2
SW
1
R105
R123
R108
R125
R110
R124
R109
R126
R113
1
4.7K
22K
4.7K
22K
4.7K
22K
4.7K
22K
4.7K
22K
4.7K
22K
100K
R149100K
R150
R163
100K
C166
10u/16V
C165
103
R151 100K
C110
10u/16V
C111
10u/16V
C112
10u/16V
C116
10u/16V
C117
10u/16V
C164
10u/16V
Vr
R164
100K
L
R
SL
SR
C
SW
2
3
C177 473
C176 473
C175
C118
10u/16V
C127 103
R154
8 4
+9V
47K
N105A
IC4558
C178
682
1U/50V
1
44
1
OUT1
2
TRE1
3
BASS11
4
BASS12
5
BASS13
6
SELL
7
FLIN
8
NC
9
FLOUT
10
FROUT
11
COUT
39
35
40
CE
VSS
LC75347E
36
37
38
DI
CL
TIM
VDD
MUTE
BASS23
BASS22
BASS23
OUT343OUT2
41
OUT4
RLO12RRO13SBWO14NC15SBW16NC17RR18NC19RL20NC21C
34
FLT
TRE2
SELR
FRIN
VREF
22
FRT
22K
N103
682
33
C182
32
31
30
C181 473
29
28
C180
FL
NC
FR
473
27
26
25
24
C179
23
1U/50V
C122
22u/16V
VD110
VD113
1N4148
1N4148
R153
47K
C167
R155
C151
223
100K
10u/16V
SW
R177
4.7K
R156 150K
6
5
C113
L
10u/16V
C114
R
10u/16V
C115
SL
10u/16V
C119
SR
10u/16V
C120
C
10u/16V
C121
1u/16V
C152 182
IC4558
P_LRM LRM
C131
104
R141
R168
R147
100K
100K
R166
100K
R148
100K
R152
100K
R112
100K
N105B
C136 1u
R144
7
R172
100K
1K
Vr
V109 2N5401
R171
P_LRM
0
C130
10U/16V
R146
10K
V110
S8050
R143
100K
R175
V107
9014
1K
R142
1K
R139
1K
R111
1K
R145
1K
LRM
VD108
1N4148
C137 0.47u
C145 100u/25V
C163
22u/16V
C140
+22V
C138
472
C170
472
C139
472
C142
472
472
VD114
MUTE1
1N4148
C132
P_SCM
C134 0.1u
C135
C150 22u
C173
0.1u
C107
473
C149 47u/35V
N102
9
VCC
8
OUT1+
7
MODE
6
SVR
5
GND
4
IN1+
3
CIV
2
OUT2-
1
IN2+
TFA9843J
C129
0.1u
0.1u
0.1u
4.7K
4.7K
4.7K
4.7K
R132
R157
1/1W
C128
104
V108
C133
104
SR
SL
C
10
V101
9015
R176 22K
9014
XS104
1
2
CON2
B
V102
9015
C146
22u/25V
A
+5V
XS105
1
+5V
2
CON12
VD107
3
4
5
6
7
8
9
10
11
12
+22V
RE
P_SCAN
GND
+22VOUT/R
C105
473
C147
100u/35V
C106
473
100u/35V
C148
C174 1u/16V
C144 100u/25V
1N4148
R134
330
R133
330
330
R135
330
R136
V103
9015
VD106
1N4148
C143100u/25V
R
L
1N4148
VD115
R174
10K
1
2
3
4
5
6
7
8
9
V104
9015
N106
OUT+
GND1
VCC1
OUT2MODE2
IN2+
SGND
IN1+
IN3+
TDA8947J
R173
OUT/L
MUTE1
OUT4+
VCC2
GND2
OUT3-
CIV
IN4+
SVR
MODE1
10K
N101
9
VCC
8
OUT1+
7
MODE
6
SVR
5
GND
4
IN1+
3
CIV
2
OUT2-
1
IN2+
TFA9843J
OUT/SL
17
OUT/C
16
15
14
13
12
11
10
OUT/SR
104
OUT/R
OUT/L
OUT/SL
OUT/SR
OUT/C
C153
220u/25V
C154
220u/25V
C155
220u/25V
C156
220u/25V
C157
220u/25V
R158
1/0.5W
R159
1/0.5W
R160
1/0.5W
R161
1/0.5W
R162
1/0.5W
C160
C158
104
C159
104
C161 104
C162
104
XS107
1
2
3
4
5
6
7
CON7
R
L
SL
SR
C
GND
123456
0.0
F
E
D
C
B
A
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