BOSE 250570 Schematic
8
7
6
5
4
3
2
1
[-----------From Card Edge----------]
+
AIN1
R91
1.00M
D D
R
AIN2
R92
1.00M
R
3
TL074
1
U2A
-
2
+
5
TL074
U2B
-
6
HPF_IN_1
7
HPF_IN_2
AUDIO BUFFERS
CLOCK
1
DATA
2
ENABLE
3
C C
4
5
6
7
8
9
10
J1
+5D
+15
+5A
-5A
-15
D
AIN1 HPF_IN_1
1
AIN2 HPF1_1
2
ID HPF2_1
3
AOUT1 HPF3_1
4
AOUT2 LPF_IN_1
5
PEAK1 LPF1_1
6
PEAK2 LPF2_1
7
8
J2
R
[----------------To Card Edge---------------]
OUT_1
C71
1.0uF
OUT_2
C72
1.0uF
1
2
3
4
5
6
7
LPF3_1
8
J3
CONNECTORS
J4
R81
100K
R82
100K
1
2
3
4
5
6
7
8
9
R
R
EQ_IN_1
EQ_OUT_1
ID_1
SW1
+5A
+15
-15
U1A
U1D
U1B
U1C
TL074
D1
TL074
TL074
D3
TL074
63
N1C
10K
16pF
63
N2C
10K
16pF
31
1
C1
31
14
7
C2
31
8
2
3
6
5
D2
U3A
+
TL072
N1D 10K
D4
U3B
+
TL072
N2D 10K
1
54
31
7
54
PEAK
J6
+5D
1
2
3
4
5
6
7
8
9
4
U22B
5
74HC00
9
U22C
10
74HC00
12
U22D
13
74HC00
SPARES
EQ_IN_2
EQ_OUT_2
ID_2
SW2
+5A
+15
-15
N1A
10K
81
6
8
11
R
DD
AOUT1
AOUT2
N1B
10K
R
N2A
10K
N2B
10K
R
2
-
3
72
81
72
+
13
-
12
+
6
-
5
+
9
-
10
+
+
12
13
10
TL074
14
U2D
-
+
TL074
U2C
-
9
R
AOUT1
8
AOUT2
[------To Second Submodule-----][------To First Submodule------][--------To Card Edge--------]
HPF_IN_2
1
HPF1_2
2
HPF2_2
3
HPF3_2
4
LPF_IN_2
5
LPF1_2
6
LPF2_2
7
LPF3_2
8
J5
PK1X
C41
0.1uF
D
PEAK2
C42
0.1uF
D
DETECTORS
49.9K
6
R42
R41
49.9K
R83
100K
R84
100K
U1
+15
U11 NJM2120
1
2
3
7
6
R
R
U12 NJM2120
1
2
3
7
6
5
1
0
1
0
If NO submodule present,
audio out = audio in.
If submodule IS present,
audio out = submodule out.
8
+15
4
-15
5
OUT_1
-15
PCB1 PT195570AA
LABEL1 LASER LABEL
R98 N/A
+5A
8
+15
4
-15
5
OUT_2
4
ANALOG ID
BOSE ENTERO SE 16 AUDIO PROCESSOR
U2 U31
U3
C45
C43
0.1uF
0.1uF
C46
C44
0.1uF
0.1uF
ID
SERVICE MANUAL PART NUMBER 256689
FIXED EQ CARRIER MODULE
3
U11
+5D
U12
1
2
C51
0.1uF
D
U22A
74HC00
C47
0.1uF
C48
0.1uF
ENABLE
C49
0.1uF
C50
0.1uF
TMR
PART NUMBER 250570
SHEET 1 OF 1
U21
U22
+5D
DATA
3
D
2
U21 74HC165
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
CODE=042 HEX
DIGITAL ID
QH
QH
9
ID
7
1
U31 NJU7312M
HPF1_1
HPF2_1
HPF3_1
LPF1_1 EQ_IN_1
B B
LPF2_1
LPF3_1
ID_1 SUB_ID
ID_2
HPF1_2 LPF_IN_2
HPF2_2
HPF3_2
LPF1_2
LPF2_2
LPF3_2
SUB_ID PEAK1
PK1X
DATA
CLOCK
ENABLE
A A
2
3
4
6
7
8
10
11
29
28
27
25
24
23
21
20
17
D
16
CK
14
ST
13
18
Select 1 of 3 HPFs; select 1 of
3 LPFs; select source for PEAK1.
SWITCHES
8
GND
5
9
12
26
22
19
30
+V
1
-V
15
N5A
1M
N5B
1M
R95
221K
N5C
1M
N5D
1M
LPF_IN_1
EQ_IN_2
+15
-15
81
72
63
54
D
R
+15
SW1
HPF_IN_1
EQ_OUT_1
+15
SW2
HPF_IN_2
EQ_OUT_2
BYPASS
7
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