BOSE SD259148 Schematic

8

7

6

5

4

3

12

H

TO TERM BLOCK

CHANNEL 1

INPUT

TO TERM BLOCK

SEE NOTE 7

G

TO TERM BLOCK

F

E

TO TERM BLOCK

TO TERM BLOCK

CHANNEL 2

INPUT

SEE NOTE 7

TO TERM BLOCK

D

C

+15V

-15V

B

A

P6

+

J3

XLR

P6
GND

J3

XLR

P6

-

XLR

J3

P6

+

J4

XLR

P6

GND

XLR

J4

P6

-

J4

XLR

C37 C87

C17

C6

.1

.1

.1

CER

CER

CER

C36

C16

C5

.1

.1

.1

CER

CER

CER

5

3

4

1

6

2

2

3

1

1

3

2

C54

C52

.1

.1

CER

CER

C53 C76

C51

.1

.1

CER.1CER

CER

+15V

1N4148

R2

1.00K

R5

C1

1N4148

100K

1000P

R213

-15V

0

+15V

1N4148

R3

1.00K

C2

R6

1000P

1N4148

100K

-15V

+15V

1N4148

R66

1.00K

R128

C47

R214

0

R67

1.00K

1000P

C48
1000P

-15V

+15V

1N4148

D7
1N4148

1N4148

100K

R129
100K

-15V

C77

C65

.1

.1

CER

CER

C64
.1
CER

CHASSIS MOUNT

D1

R1

1.00K

D2

1N4746A

18V,1W

D3

R4

1.00K

D4

D5

R65

1.00K

D6

1N4746A

18V,1W

R68

1.00K

D8

.1
CER

C86
.1
CER

D26

D28

D25

1N4746A

18V,1W

C3

22/35V

-10dB

C4

22/35V

INPUT LEVEL

D27

1N4746A

18V,1W

C49

22/35V

-10dB

C50

22/35V

INPUT LEVEL

C98
.1
CER

C97
.1
CER

1

P1

2

P1

2.00K

2.00K

S4

R7

R69

C100
.1
CER

C99
.1
CER

8.06K

S3

8.06K

R8

321

+4dB

-10dB

R70

654

+4dB

-10dB

U1

12

+

1/4

13

-

C120
100P

C7

100P

654

+4dB

S3

3

+

1/4

2

-

C119
100P

C55

100P

R71 R72

8.06K

2.00K

321

+4dB

S4

LINE CORD ASSEMBLY:

C150

C132

C130

.1

.1
CER

C129
.1
CER

CER

C131
.1
CER

.1

C151

.1

S5

J1

POWER

CHASSIS MOUNT

C11

U1

10

+

14

1/4

9

8

-

C140

(N U)

R10R9

2.00K8.06K

U1

C8

(N U)

R11

10K
R12
1K

C9

.0022

R38

6.81K

5

U6

+

1/4

6

7

-

MONO

C164

100P
R155

4.75K

R154

R39

6.81K

1

DENOTES CRITICAL COMPONENTS.
REPLACE ONLY WITH IDENTICAL BOSE PARTS.

TRANSFORMER:

STRAIN RELIEF:

POWER SWITCH: P/N 143960 (100V/115V/230V/240V)

MONO

4.75K

U1

5

+

1/4

6

7

­C141

(N U)

C56

(N U)

R73

10K

R74
1K

C57
.0022

C109:

P/N 103447-C (115V)
P/N 146354 (100V/230V/240V)

P/N 180128-1 (115VAC)
P/N 180128-2 (230VAC/240VAC)

P/N 173224 (100VAC)(2-WIRE)
P/N 173242 (115VAC)(3-WIRE)
P/N 173243 (230VAC)(2-WIRE)
P/N 173246 (240VAC)(3-WIRE)
P/N 173245 (115VAC/240VAC)

P/N 144011 (100VAC/230VAC)

P1,P2:

P/N 143963 (100V/115V/230V/240V)

J1,J2:

P/N 143968 (100V/115V/230V/240V)

J2

C109
.0047
LINE

R14R13

1.47K2.21K
C10

.0018

C121

(N U)

S2

OUTPUT MODE

S2

R75 R76

1.47K2.21K

C125

(N U) (N U)

TRANSFORMER

1

P2

2

.027

654

STEREO

STEREO

321

C59

.027

C58

.0018

T1

R174

681

12

13

R163

(N U)

R176

681

3

2

+

1/4

­C122

(N U)

R162

CW

R126

CCW

R126

CCW

+

1/4

­C126

(N U)

R169

0

C123
(N U)

(CH 1)

10K

(CH 2)

CW

10K

U2

0

U2

R164
(N U)

C127
(N U)

14

R171R170

(N U)

3B

1B

R175

681

3A

R177

1

P2

CHASSIS MOUNT

2B

2A

1A

681

1

P3

2

P3

3

P3

C12
.082

R15

182K

C139
(N U)

R188

(N U)

R187
(N U)

LF LEVEL

R190
(N U)

R189
(N U)

C60
.082

R77

182K

C138
(N U)

C110
.001

C111

.001

3.83K

R165

25.5K

R185

(N U)

U2

10

+

1/4

9

8

-

R17

1K

R18

5.76K

C13

.01

CHANNEL 1

U7

12

+

1/4

13

14

-

C162

100P

R40

4.75K

R41

5.90K

R78 R85

3.83K

R172

25.5K

R184
(N U)

U2

5

+

1/4

6

7

-

R79

1K

R80

5.76K

C61

.01

CHANNEL 2

U7

3

+

1/4

2

1

-

C163

100P

R100

4.75K

R101

5.90K

Z1

100V,1A

C112

.01

C133

.01

C15

C14

(N U)

(N U)

R19

2K

C124
(N U)

R44

1.10K

C28 C29 C30

.22 .22

.47

R42

5.11K

C62 C63

(N U) (N U)

R81

2K

C128

(N U)

R104

1.10K

C80C79C78

5.11K

C115

C113

1/50V

2200/50V

C116

C114

1/50V

2200/50V

R23R16

(N U)
R166
(N U)

U3

12

+

1/4

13

-

R21

0

R20

R22

10K

(N U)

U7

9

­1/4

10

+

R43

221K

(N U)

R173
(N U)

U3

3

+

1/4

2

-

R83

0

R82 R88

R84

10K

(N U)

U7

6

­1/4

5

+

.22.22.47

R103R102
221K

NJM78M15FA

3

1

U13

2

1

U14

3

2

NJM79M15FA

R24

0

14

(N U) (N U)

C31 C32

8

.1

R45

49.9K

C135

(N U)

R86

1

0

C88 C89 C90

(N U)

R105

49.9K

C137

(N U)

+15V

C117

1/50V

C118

1/50V

-15V

C18

C20

.068

.022

R27

30.1K

C19

(N U)

R52

(N U)

C40C39C38

(N U)

R51

(N U)

R46

68.1K

12

.1

13

R180
221K

C68C66

.068

.022

R89

30.1K

C67

(N U)

R112

(N U)

(N U)

(N U)

R111 R113

R106

68.1K

C82C81

37

.1.1

2

R183
221K

TP1

R127

R158

TP3

5.6K

47.5K

R159

TP2

D41

47.5K
GREEN

+

-

+

-

R28

5.76K

R26
(N U)

R53

(N U)

1/4

R161

4.32K

5.76K

(N U)

10

(N U)(N U)

1/4

R168

4.32K

R25

6

5

6.98K

R90

R87

9

R107

6.98K

0

R47

0

10

9

R31

3.01K

U5

-

7

1/4

+

U8

14

5.49K 14.0K

R160

1.00K

5

6

R93

3.01K

U6

-

8

1/4

+

(N U)

U8

1

R167

1.00K

+15V

GND

GND

-15V

R29

2K

U3

+

1/4

8

­C21

.047
R30

634

C41

(N U)

R54

(N U)

C134
(N U)

R48 R50R49

14.0K

C33 C34

.22

R91

2K

U3

+

1/4

7

­C69

.047
R92

634

(N U) (N U)
R114

(N U)

C136
(N U)

R109 R110R108

14.0K

5.49K

C83

.22

2

P4

11

P5

12

P5

1

P4

UNPROCESSED SIGNAL (CH 1)

FULL RANGE NO HPF (CH 1)

R33

7.15K

U4

13

-

FULL RANGE (CH 1)

14

1/4

12

+

R32
75K

9

­1/4

10

+

R36

78.7K

R59

(N U)

0

(N U)

U4

R61

8

(N U)

C44C43

C45

(N U)

(SEE NOTE 12)

HF BIAMP (CH 1)

(SEE NOTE 12)

PASSIVE (CH 1)

R62

(N U)

R63

(N U)

R58

12

+

1/4

(N U)

13

­C46

R60

(N U)

(N U)

R64

0

R156

6.81K

U5

BASS BIAMP (CH 1)

(N U)

C24

.082

R34

(N U)

C27

.022

R35

(N U)

R55

(N U)
R178
(N U)

C42

R179
(N U)

C35

.18

10

C23C22

.082

0

R37

21.5K

C26

C25

.022

0

U5

3

+

1/4

2

1

-

R57

(N U)
R56
(N U)

U8

9

-

8

1/4

+

.022

BASS (CH 1)

UNPROCESSED SIGNAL (CH 2)

FULL RANGE NO HPF (CH 2)

R95

7.15K

U4

C70 C71

C72

.082

R96

(N U)

C73C75

.022

R97

(N U)

R115

(N U)
R181
(N U)

R182

(N U)

C85

.18

14.0K

U6

12

+

1/4

13

-

R117

(N U)
R116
(N U)

U8

6

­1/4

5

+

C84
.022

C92C91

2

-

FULL RANGE (CH 2)

R119

0

1/4

3

+

R94
75K

U4

6

­1/4

5

+

R98

78.7K

C93 C94

(N U) (N U)

R121

36.5K

1

7

(N U)

R118

(N U)

R120
(N U)

C95

(N U)

SEE NOTE 12

HF BIAMP (CH 2)

SEE NOTE 12

R122

(N U)

R123

U6

3

+

1/4

2

-

C96

(N U)
R125

0

R124

0

BASS BIAMP (CH 2)

.082

0

R99

21.5K

C74

.022

0

14

7

BASS (CH 2)

NOTES:

UNLESS OTHERWISE SPECIFIED:

1. ALL RESISTORS ARE EXPRESSED IN OHMS AND ARE 1/8W, 1%.

2. ALL CAPACITORS ARE EXPRESSED IN MICROFARADS.

3. ALL NON-POLARIZED CAPACITORS ARE FILMS AND ARE +/-5%.

4. ALL POLARIZED CAPACITORS ARE RADIAL ELECTROLYTIC AND ARE +/-20%.

5. U9 - U12 : RC4559N OR NJM4559D (8 PIN).
+V IS PIN 8, -V IS PIN 4.

6. U1 - U8 : RC4156N OR NJM2059D (14 PIN).
+V IS PIN 4, -V IS PIN 11.

7. U15 : LM339N (14 PIN).

+V IS PIN 3, -V IS PIN 12.

8. INSTALL JUMPER, 0 OHM, IN LOCATIONS: C24 AND C72.

9. RELAYS K1 AND K2 ARE SHOWN IN THE DE-ENERGIZED STATE.

10. RELAYS K1 AND K2 ARE 4PDT (BOSE P/N 144017).

11. THREE WIRE AC CORDS ARE USED ON THE US, UK, AND AUSTRALIAN

VERSIONS, THEREBY TYING THE CHASSIS TO EARTH GROUND.
TWO WIRE CORDS ARE USED ONLY ON THE EUROPEAN AND
JAPANESE VERSIONS.

12. CONNECTORS P4 AND P5 ARE FOR CONNECTIONS TO THE OC-1 AWCS
OPTION CARD. REFER TO SD 145609.

10

P4

9

P4

6

P4

5

P4

7

P4

OPTION HF

U5

9

­1/4

10

14

+

3

P4

(N U)

11

P4

(N U)

12

(N U)

P4

8

P4

OPTION BASS

(CH 1)

4

P4

10

P5

9

P5

6

P5

5

P5

PASSIVE (CH 2)

7

P5
OPTION HF

(CH 2)

1

1

P5

(N U)

2

P5

(N U)

3

(N U)

P5

8

P5

OPTION BASS

(CH 2)

4

P5

D42

47.5K

1N4148

D43

1N4148

S1 MODE SWITCH
POS 1 VOICE ONLY / FULL RANGE (WITH 402"S ONLY)
POS 2 STANDARD 2 WAY (WITH 502B)
POS 3 ( NOT USED )
POS 4 2-WAY WITH LOW FREQUENCY OPTION

R130

4.75K

R131

4.75K

R135

4.75K

R139

4.75K

U9

2

­1/2

3

+

U9

6

­1/2

5

+

R134

4.75K

U11

6

­1/2

5

+

U12

6

­1/2

5

+

(N U)

R138

4.75K

U10

2

­1/2

3

+

U10

6

­1/2

5

+

(CH 1)

8

(N U)

POS 1

23

22

POS 2

21

POS 3

POS 4

20

MODE SELECT

R145

0

OPTION

R144

0

17

POS 1
POS 2

16

POS 3

15

14

POS 4

MODE SELECT

11

POS 1

POS 2

10

POS 3

9

POS 4

8

C153

22/35V

S1

,24

19

C155

22/35V

S1

,18

13

C157

22/35V

S1

,12

7

MODE SELECT

R142

R143

4.75K

4.75K

U11

2

­1/2

3

+

U12

2

­1/2

3

+

R137

R136

POS 1

POS 2

POS 3

POS 4

C159

22/35V

0

OPTION

0

5

S1

4

,6

1

3

2

MODE SELECT

+15V

R209

47.5K

R207

C165
(N U)

D40

1N4737A

7.5V,1W,5%

C161
.1

+15V

10.0K

R199 R201

6.81K

R210

R200

475

R208

10.0K

17.8K

4

5

11

10

­1/4

+

LM339N

R211

(N U)
R202
1M,5%

U15

+

1/4

-

LM339N

U15

R212

2

4.75K

R203

221

13

(N U)

+15V

D29

D9

1N4148

R191

1

200

D10

1N4148

D30

1N4746A

18V,1W

-15V

R192

7

200

+15V

D31

D13

1N4148

R193

7

200

D14

1N4148

D32

1N4746A

18V,1W

-15V

R194

7

200

+15V

D33

D17

1N4148

R195

1

200

D18

1N4148

D34

1N4746A

18V,1W

-15V

R196

7

200

+15V

D35

D21
1N4148

R197

1

200

D22

1N4148

D36

1N4746A

18V,1W

-15V

R198

1

200

1N4746A

18V,1W

1N4746A

18V,1W

1N4746A

18V,1W

1N4746A

18V,1W

C142
1000P

C143
1000P

C144
1000P

C145
1000P

C146
1000P

C147
1000P

C148
1000P

C149
1000P

R146

R215

R147

200

R148

R216

R149

200

R150

R217

R151

R152

200

R218

R153

200

K2

6

P7

+

2

P9

200

4

P7

GND

1

P9

0

5

P7

-

3

P9

K2

K1

6

P8

+

2

P10

200

4

P8

GND

1

P10

0

5

P8

-

3

P10

K1

K2

3

P7

+

2

P11

200

1

P7

GND

1

P11

0

2

P7

-

3

P11

200

K2

K1

3

P8

+

2

P12

1

P8

GND

1

P12

0

2

P8

-

3

P12

K1

+15V

U15

+

7

1/4

1

R205

47.5K

-

6

9

+

8

-

LM339N

R206
1M,5%

U15

1/4

14

LM339N

D38

1N4148

R157
10K

1/2W,5%

R186
(N U)

+15V

D37 D39

1N4148

R204

221

C152
22/35V

SAFETY CONTROLLED

FRAMINGHAM, MA 01701-9168

TITLE

402C II CONTOLLER

PCB ASSEMBLY

PART NUMBER 259148

TO TERM BLOCK

XLR

TO TERM BLOCK

CHANNEL 1

XLR

HF OUTPUT
SEE NOTE 7

TO TERM BLOCK

XLR

TO TERM BLOCK

XLR

TO TERM BLOCK

CHANNEL 1

XLR

LF OUTPUT
SEE NOTE 7

TO TERM BLOCK

XLR

TO TERM BLOCK

XLR

TO TERM BLOCK

CHANNEL 2

XLR

HF OUTPUT
SEE NOTE 7

TO TERM BLOCK

XLR

TO TERM BLOCK

XLR

TO TERM BLOCK

CHANNEL 2

XLR

LF OUTPUT

SEE NOTE 7

TO TERM BLOCK

XLR

+15V

K2

K1

1N4148

Q1

2SC2812

-15V

12345678

H

G

F

E

D

C

B

R

A