BOSE 250585 Schematic

A

B

C

D

E

U15

NJM4580M

VCOUT1

3

5

6

20

19

TC9412AF

+

+

AOUT1

U14

U15

U16

U18

C55

1

AOUT1

Sh 2

C49

C50

C51

C52

C54

D

2.2uF

2

U14A

LD1A

LD1B

LD2A

LD2B

2.2uF

-

0.1uF

0.1uF

0.1uF

0.1uF

Sh 2

LIMOUT1

4

3

+15

+

IN1

OUT1

R79

R78

1.79K

DATA

13

100K

VC1_CLK

DATA

U14

U15

U16

U18

12

NABL1

CLOCK

14

VOLUME CONTROL

R

C61

D

C56

C57

C58

C59

STROBE

R80

1000pF

4

200

-15

0.1uF

0.1uF

0.1uF

0.1uF

4

Sh 2

LIMOUT2

21

DGND

DGND DGND

RGND

RGND

22

OUT2

IN2

+15

15-

+

NC NC

NC

NC

NC

NC

C62

2.2uF

16

11

9

7 18

24

1

23

17

15

10

8

2

NJM4580M

+5D

VCOUT2

+

5

+

U17

U19

U20

U21

U22

AOUT2

C68

7

AOUT2

Sh 2

C63

C64

C65

C66

C67

6

U14B

2.2uF

-

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

+15

-15

D

R

R

R82

R81

1.79K

100K

D

DECOUPLING

R

C69

R83

1000pF

200

N2A

10K

PEAK1

R

Return directly to J3-8, RGND.

1

8

N2B

1

10K

C70

1

D9

Sh 2

PKDET1

2

7

2

C71

D10

0.1uF

-

1

2

16pF

U16A

-

3

6

3

6

1

U18A

3

+

TL074CDI

-

7

3

3

3

N2C

U16B

+

TL072

5

3

D

10K

+

TL074CDI

NABL0 Primary register, HC595

N2D

R

10K

PEAK2

NABL1 Output gain 9412

N3A

4

5

1

NABL2 Limiter gain 9412

1

10K

C72

1

D11

U22A

NABL3 Mic gain 7312

Sh 2

PKDET2

1

8

9

C73

D12

0.1uF

3

NABL1

-

8

6

2

16pF

74HC00

NABL4 Limiter attack/release 7312

U16C

-

2

7

10

13

7

NABL5 Phantom power and mic gain, HC595 (ADG452)

+

-

14

5

U18B

3

TL074CDI

N3B

12

U16D

3

+

4

D

10K

+

TL074CDI

TL072

U22B

6

NABL2

Sh 2

N3C

N3D

R

PEAK DETECTORS

5

74HC00

3

6

4

5

9

U22C

8

NABL3

Sh 3

10

74HC00

12

U22D

11

NABL4

Sh 2

2

Card ID

13

74HC00

2

+5D

0x41

U23

1

U20A

10

3

SER

2

11

74HC00

A

12

B

13

U19

74HC595

C

CLOCK

Sh 2,3

14

15

D1

14

D

SER

QA

D2

3

1

E

CLOCK

11

QB

D3

4

2

U17A

F

SRCLK

QC

D4

5

10

3

U17C

G

+5D

SRCLR

QD

9

D5

1

2

4

6

4

H

QH

NABL0

12

QE

U20B

6

5

6

VC1_CLK

5

DATA

2

7

RCLK

QF

5

QH

13

6

74HC00

CLK

G

QG

15

DATA

Sh 2,3

7

74HC04

ENABLE

INH

QH

1

D

U17B

74HC04

SH/LD

9

U17D

+5A

QH

74HC165

DATA

3

4

9

U20C

R98

8

9

8

VC2_CLK

R

N/A

10

74HC00

Sh 2

U21

74HC595

74HC04

1

1

U17E

14

15

60_1

Sh 3

74HC04

SER

QA

50_1

Sh 3

1

2

2

1

1

ID

ENABLEBAR

11

10

ENABLE

11

QB

60_2

Sh 3

3

3

2

AOUT1

CH_SEL

SRCLK

QC

50_2

Sh 3

4

4

+5D

10

3

R

TM

AOUT2

12

SRCLR

QD

PP1

Sh 3

5

5

VCC

4

BOSE

ENTERO

SE 16 AUDIO PROCESSOR

PEAK1

NABL0

QE

6

R99

6

+15

74HC04

U20D

11

12

5

PP2

Sh 3

PEAK2

N/A

13

74HC00

RCLK

QF

SERVICE MANUAL PART NUMBER 256689

7

7

+5A

13

6

G

QG

8

8

-5A

+5D

U17F

7

QH

R

9

-15

GND

13

12

CH_SELBAR

D

9

MIC/LINE INPUT WITH LIMITER MODULE

J3

R

10

QH

PART NUMBER 250585

J4

D

D

SHEET 3 OF 3

74HC04

A

B

C

D

E