BOSE 250585 Schematic

A

B

C

D

E

LD2B

U15

19

TC9412AF

OUT1

OUT2

NC2NC8NC10NC15NC17NC

D10

D12

31

31

CLOCK

DATA

B

2

3

6

5

11 10

13 12

3

22

­U18A

+

­U18B

+

TL072

U17E

74HC04

U17F

74HC04

VCOUT1

VCOUT2

D9

1

TL072

D11

7

+

C54

2.2uF

R78

100K

R

+

C68

2.2uF

R81

100K

R

PEAK1

C70

0.1uF

31

D

PEAK2

C72

0.1uF

31

D

CLOCK Sh 2,3

DATA Sh 2,3

12

13

CH_SELBARGND

C55

2.2uF

LIMOUT1Sh 2

DATA
VC1_CLK
NABL1

4 4

3 3

2 2

1 1

DATA

ENABLE

J3

LIMOUT2Sh 2

PKDET1Sh 2

PKDET2Sh 2

Card ID

0x41

+5D

R

1
2

ID

3

AOUT1

4

AOUT2

5

PEAK1

6

PEAK2

7
8

R

U23

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

74HC165

4

IN1

+

13

DATA

12

CLOCK

14

STROBE

21

IN2

+

C62

2.2uF

N2B
10K

N2C
10K

N3A
10K

N3B
10K

N3C

9

QH

7

QH

R99

N/A

A

5

LD1A

VOLUME CONTROL

DGND

DGND

16

D R R

N2A 10K

2

72

­U16A

3

63

+

N2D
10K

9

81

­U16C

10

72

+

63

+5A

R98
N/A

R

J4

6

LD1B

RGND

DGND

RGND

7

9

11

18

81

1

TL074CDI

54

8

TL074CDI

N3D

54

1
2

ENABLEBAR ENABLE

3

CH_SEL

4
5

+15

6

+5A

7
8

-5A

-15

9

10

D

20

LD2A

-15

+15

23

1

24

-15

+15

C71

16pF

6

-

7

U16B

5

+

TL074CDI

R

C73

13

12

R

16pF

-

14

U16D

+

TL074CDI

PEAK DETECTORS

VCC

+5D

D

NJM4580M

+

3

U14A

-

2

R79

1.79K

R80

200

U20D
74HC00

R

1000pF

NJM4580M

+

5

U14B

-

6

R82

1.79K

R83

1000pF

200

Return directly to J3-8, RGND.

11

C61

C69

C

+5D

D

+15

D

-15

U14 U16 U18U15

C49

0.1uF

U14 U18U16U15

C56

0.1uF

U17

C63

0.1uF

D

NABL0 Primary register, HC595

NABL1 Output gain 9412

NABL2 Limiter gain 9412

NABL3 Mic gain 7312

NABL4 Limiter attack/release 7312

NABL5 Phantom power and mic gain, HC595 (ADG452)

NABL2 Sh 2

NABL3 Sh 3

NABL4 Sh 2

6

8

C51

0.1uF

C58

0.1uF

C65

0.1uF

C52

0.1uF

C59

0.1uF

C66

0.1uF

C50

0.1uF

C57

0.1uF

U19 U20 U21 U22

C64

0.1uF

DECOUPLING

U17C

5 6

74HC04
U17D

9 8

74HC04

TM

C67

0.1uF

VC1_CLK

VC2_CLK

Sh 2

1

AOUT1

7

AOUT2

+5D

NABL0

D

+5D

NABL0

D

AOUT1 Sh 2

AOUT2 Sh 2

U19

14

SER

11

SRCLK

10

SRCLR

12

RCLK

13

G

U21

14

SER

11

SRCLK

10

SRCLR

12

RCLK

13

G

74HC595

74HC595

1

U22A

2

74HC00

4

U22B

5

74HC00

9

U22C

10

74HC00

12

U22D

13

74HC00

1

U20A

2

74HC00

D1

15

QA

1

QB
QC
QD
QE
QF
QG
QH

QH

QA
QB
QC
QD
QE
QF
QG
QH

QH

D2

2

D3
D4

3

D5

4
5
6
7

9

15
1
2
3
4
5
6
7

9

60_1 Sh 3
50_1 Sh 3
60_2 Sh 3
50_2 Sh 3
PP1 Sh 3
PP2 Sh 3

1 2

3 4

U17A

74HC04

U17B

74HC04

3

6

8

11

3

R

BOSE ENTERO SE 16 AUDIO PROCESSOR

NABL1

4

U20B

5

74HC00

9

U20C

10

74HC00

SERVICE MANUAL PART NUMBER 256689

MIC/LINE INPUT WITH LIMITER MODULE

PART NUMBER 250585

SHEET 3 OF 3

D

E