BOSE 250564 Schematic
8
R11
1.000K
C21
330pF
D D
C C
J3
1
2
3
CON3
J4
1
2
3
CON3
+IN1
-IN1
SHLD
+IN2
-IN2
SHLD
R12
1.000K
R13
1.000K
R14
1.000K
C22
330pF
C23
330pF
C24
330pF
3 2
D5
-15
BAV99
3 2
D6
BAV99
-15
3 2
D7
BAV99
-15
3 2
D8
BAV99
-15
7
100pF
100pF
C11
C12
2
25K
25K
3
U11 SSM2141S
2
25K
25K
3
U12 SSM2141S
25K
_
+
25K
25K
_
+
25K
1
+15
1
+15
1
+15
1
+15
6
5
6
1
5
6
1
1000pF
C31
R31
10.0K
R
R33
10.0K
R
1000pF
C32
R32
10.0K
R34
10.0K
R
R
2
U3A
3
+
NJM4565MA
C25
330pF
2
U4A
3
+
NJM4565MA
C26
330pF
5
1
C61
2.2uF
4
+
DATA
VC_CLK
ENABLE
1
C62
2.2uF
13
12
14
21
+
U13
IN1
DATA
CLOCK
STROBE
IN2
4
5
LD1A
DGND3
DGND2
DGND116RGND1
9
11
D
LD1B
R
6
RGND2
18
7
TC9412AF
+15
24
+15
LD2A
3
20
-15
-15
19
LD2B
NC62NC58NC410NC315NC217NC1
23
1
R
OUT1
OUT2
3
22
C63
2.2uF
C64
2.2uF
+
R51
100K
+
R52
100K
2
NJM4565MA
5
+
U3B
-
6
R35
10.0K
R
R21
1.10K
R
NJM4565MA
+
5
U4B
-
6
R36
10.0K
R
R22
1.10K
R
7
C13
100pF
7
C14
100pF
1
AOUT1
AOUT2
160KHz
LPF
ESD RFI
Over-
Voltage
Common
Mode
28KHz
LPF
2.6Hz
HPF
Volume
Control
0.7Hz
HPF
20dB
Gain
AUDIO SIGNAL PATH
12
13
9
U22C
10
81
72
81
72
54
N1C 10K
2
-
U1A
3
+
TL074
N2C 10K
6
-
U1B
5
+
TL074
N2D
63
D1
1
13
12
R
63
7
54
9
10
R
C1
16pF
-
+
-
+
U1D
U1C
TL074
TL074
16pF
14
D3
C2
8
2
3
31
6
5
31
-
U2A
+
-
U2B
+
TL072
TL072
D2
1
31
D4
7
31
PEAK DETECTORS
PEAK1
C41
0.1uF
D
PEAK2
C42
0.1uF
D
+15
C43
C45
C47
0.1uF
0.1uF
0.1uF
C48
C46
C44
D
0.1uF
-15
+5D
0.1uF
D
0.1uF
U14
C55
0.1uF
DECOUPLING VC CLOCK
C49
0.1uF
C50
0.1uF
U91
C56
0.1uF
U12 U13U1 U2 U4 U11
C51
0.1uF
C52
0.1uF
C53
0.1uF
C54
0.1uF
1
2
ID
3
AOUT1
4
AOUT2
5
PEAK1
6
PEAK2
7
8
J2
R
CLOCK
1
DATA
2
ENABLE
3
4
5
6
7
8
9
10
J1
CONNECTORS
+5D
+15
+5A
-15
D
DIGITAL ID
CODE = 046 HEX
+5D
DATA
ENBAR
G33C1 ID INFO:
NOLOAD=0.997V
LOADED=0.907V
CODE=0BA HEX
+5A
R98
N/A
ID
R99
N/A
R
VCC
GND
+5D
16
9
QH
7
QH
8
D
U91
10
SER
11
A
12
B
13
C
14
D
3
E
4
F
5
G
6
H
2
CLK
15
INH
1
SH/LD
R
74HC165
+5D
ENABLE
ENBAR
CLOCK
ID
BOSE ENTERO SE 16 AUDIO PROCESSOR
R
TM
B B
AOUT1
AOUT2
A A
N1B
10K
N2B
10K
N1A
10K
N2A
10K
N1D
SERVICE MANUAL PART NUMBER 256689
1
2
4
5
U22D
U22A
U22B
74HC00
8
74HC00
74HC00
74HC00
VC_CLK
11
3
6
LINE LEVEL INPUT MODULE
PART NUMBER 250564
SHEET 1 OF 1
8
7
6
5
4
3
2
1
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