Carvin BX-120 Schematic

INPUT

J12

D.I.PRE

1K

R288

100K

R295

H5A.A
H5A.B

H5A.C
H5A.D
R296

1M

C113

25V FET

R275

2.2K*

Q16

+

R260

15K*

1µF

R274

10K

a gnd

R221

470K*

input

R280

1M

H5B.A
H5B.B

H5B.C
H5B.D

C109

thru

39pF*

AGND

C111

R218

0.22µF/63v
C122

0.22µF/63v

22K*

+15VDC

thru

R265

R252

1M½

R236

365K

10K

R268

D18

6.8K*

R254

10K*

YEL

Q19

C117

R292

+

10K

+
C123

1µF

22µF

R293

6.8K

S3.A S3.B

R184

10K smt 1/4w

80Hz

C72

.1

R6

4.7K smt 1/4w

R169
360K smt 1/4w

P9
10K

!­+

P8

10K

C71

C81

82pF

C6

0.01µF Film SMT

.1

220K smt 1/4w

PRE AMP

100K

J10

R402

1

2

3

.001µF

100½

C403

R405

4. ADDED AS SECONDARY OPERATION.

2. ALL CAPACITORS IN MICORFARADS, EXCEPT AS NOTED.

1. ALL RESISTORS IN OHMS

R410
100K

R409
150½

R406

150½

H2B.A
H2B.B

H2B.C
H2B.D

500 Hz 800 Hz250Hz

P4
10K

C8

.047

C7

.0022

C74 R9

C75

.0033

.1

220K smt 1/4w

R7

4.7K smt 1/4w

!-

A9.A

+

R171

H2A.A
H2A.B

input

H2A.C

a gnd

H2A.D

AGND

R172

3.9K smt 1/4w

!-

A9.B

+

S6.B

C406

22µF

S6.A

GND LIFT

P5

10K

EM FSW

H3B.A

C10

.033

C9

.0022

R175

150K smt 1/4w

C404

22µF

C405

39pF

R408

10K

+15VDC

A15.A

1

-15VDC

GEQ FSW

H3B.B

2K Hz

P13

10K

C82

R10

3.9K smt 1/4w

Ð

A15.B

+7

8

R407

2

Ð
+

3

4

-15VDC

+15VDC

H3B.C

H3B.D

.01

!-

A8.A

+

6

5

10K

+24FRONT

H3B.E

NOTES: UNLESS OTHERWISE SPECIFIED.

12340 World Trade Drive
San Diego, CA 92128

ARVIN

C

[phone]
FAX [phone]

BX120

System Master

DRAWN BY:

GEORGE DREYER

APPROVED:

PCB

30-42120

NO:
ASSY.

80-42120

NO:
REVISED BY:

GEORGE DREYER

Changes from Assembly Rev (A).
Proto corrections: -15V via grounded, R257 grounded, Locational errors D11 moved up; added R11.

SMT SCREEN HOLES

#689#690

E8 E7 E6

#91 #212 #278 #268

Screw Holes for Power Amp Devices

DATE:

DATE:

REV:

REV:

DATE:

26SEPT05

C
C

14JULY06

N:48

PRI COM

E1

QC4

LINE

B120

120µF

+

C26B

B240

F1

+

QC6_SWswitch

R264

470K

C26A

120µF

QC7_SWswitch

250VAC

.047

15K*

R290

C12

560pF

cw
B50K

AMP1-

H3B.F

C13

.022µF

C118

R14

D.I.PRE

P11

C124
1µF

R267

4.7K*

10K smt 1/4w

C83
82pF

!-

A11.A

+

R12

4.7K smt 1/4w

R13

CLIP1

H3B.H

H3B.G

PRI HI

R266

365K

+

R258

150K

GRAPHIC

!-

A8.BA11.B

+

220K smt 1/4w

SEND

H3B.I

QC1GND

E4

R257
22K*

R79

10K

RETURN

H3B.J

C16

R256

22K*

+

C120

1µF

Q8

C125

R259

1K

P1

B100K

R262

6.8K

R80
33K

GRAPHIC -

C700

L3

1234

PRI COM

C708

C15

L4

1234

C14

QC3

+

1µF

cw

R82

2

Ð

A26.A

+ 1

3

R81

R173

10K

H3A.A

H3A.B

H3A.C

H3A.D
H3A.E

H3A.F

H3A.G

H3A.H

H3A.I
H3A.J

NEUTRAL

25V FET

R285

1K

DRIVE

10K

47k

R160

1M

GRAPHIC +

C78

R174

-15VAMP

+15VAMP

N:48

R284

365K

C114

1µF

+

R283

150K

1M

R294

Q5

330pF

10K

8

2

+15VAMP

Ð

A16.A

+

-15VAMP

3

4

MU F SW AMP

GEQ F SW AMP

24VJFETS

+

C186

22

CLIP AMP

SEND AMP
RETURN AMP

D2

FB

.047

PRI COM

R24

110K

N:48

C30

.0022

R282

10K

C50
.01

+15VAMP

1

R189

150k

C11

R28

Q18

R83
10K

R85

47k

R2

110K

R281

6.8K
C18

1µF

R291

1K

+

22µF

C116

Q4

R84
33K

C51
.01

R159

1M

C52

22µF

R21

R316
47K

MUTE 2

Q1

5550

1K

Q2
5401

-15VAMP

R133

2.2K

R134

TR1

T

+

C27

120µF

FSCQ1565 vert

FSCQ1565RT

Vfb

Q9

PWM

4

Vsync

53

+

C17

22uF 50V

R27

470

PRI COM

470

R26

contour

P2

B50K
cw

C134

.047µF

COMP SENS

15K

2

Ð

A10.A

+ 1

3

R415
33K

PHONESOUT

6

A16.B

5

3

+

A17.A

Ð

2

C177
82pF

4.7K

150K

R4

POWER SUPPLY

PRI COM

Drain

1

C24

2

GND
Vcc

R30 3.9K
R20 3.9K

Z3

16V

R29 3.9K

R340

100K

cw

C134A

.047µF

R328
47K

MUTE 1

R138

47K

C176

82pF

Ð
+ 7

1

CLIP AMP

R31

C40

+

PRI COM

C31

PRI COM

R19

1.5K

100K

R341

C136

39pF

6

Ð

A13.B

+ 7

5

R346

15K

R342

10K

550 Hz

C65

+

1

MASTER VOLUME

R1

22K

+15VAMP

R139

4.7K

R137

330

D106
1N914

D107

1N914

R141

4.7K

-15VAMP

Z1

+

D21

PRI

U2

.0022 630V

SHLD

BIAS

D8

+

22uF 50V

D1

PRI COM

N/U

R108

22K

6

Ð

A10.B

+ 7

5

R140
470½

39pF

R144
680

R343

C53

LOW SEC

(pin10)

OP2

R38
47K

.022µF

B50K

cw
P10

PRI HI

HI SEC

DSP

C135A

10K

CLIP1

R142
1K

Q102

5550

R143
680

Q103
5401

R145
1K

D5

FB

B50K

R197

6

A4.B

5

OUTPUT1

D7

D501

D504

R39

1K

R40
47K

2

Ð

A13.A

+ 1

3

.022µF

cw

P12

nu

C66

120pF

Ð
+ 7

R23

680

1K

R22

R147
680½

R148

560½
R15

470

L5

L6

++

R25

3.3k

35V

Z4

OP1.B

C20

22µF

C19

39pF

COMP SENS

C135

R94

10K

R111
33K

C132

R306

+

100K

.1

AMP1-

R222

R223

100

100

Q104

Q104A

MMBT5401 PNP

Q21

5550

C180

Q106

.047

TIP31

Q105

Q105A
MMBT5550 NPN

560P

R224

R225

100

100

R232

150K smt 1/4w

22uF

C106

+

C42

+

C44

L1

C503A

1000µF 25V

C504A
1000µF 25V

9.1V

Z2

C138

R41
10K

C22

.01µF

TREBLE

2.2K

R95

150K

2

Ð
+ 1

3

A4.A

R42

cw

C22A

cw

C137

330pF

cw

C23

330pF

cw

B50K

R47

10K

P3

2

Ð

A3.A

+ 1

3

6

Ð

A3.B

+ 7

5

D22 D23

22u

C131

OP1.A

1K

R198

BASS

P6

B50K

1µF

R43

2.2K

.0033µF

C21

.033µF

R44

100K

R11

330

R304

C110
.022µF

+

0

R305

10K

P7
B50K

100K

R287

MID

cw

R298

4.7K
R299

4.7K

D24D30

D11

15C50Kx2

15C50Kx2

1K

R297

C127

R117

6

Ð

A26.B

+ 7

5

P26.B

P26.A

10K

39pF

SEND

RETURN

R52
10K

cw

cw

C126

.01µF

+24FRONT

25V FET

+

C108

C107

22µF

22µF

GRAPHIC

R162

+

R164

R58

4.7½

4.7½

R57

4.7K

10K

COMPRESSOR

+15VDC

+15VDC

R118

R336

47K

R33

Q3

TIP31

22½ 1W1%

7

D111

1N914

POWER

-15VDC

S7.A

47K

R122

-24VDC

C62
.1µF

+15VAMP

D10

3.3K

S7.B

+15VDC

D16

+

+

C121
.1µF

CLEAN
R324
10K

2N5400

CLEAN

SEND AMP
RETURN AMP

+15VAMP

R329

3.3K

1N914
R312

1.8k

R210

10

R320

10K

C317
.0047µ

10K
R98

R3
10K

8

Ð

A22.D

Q302

+15VAMP

R330

5550

1K

C181

.01

A22.B

A22.A

A22.C

150K

+

R179

+14

9
6

Ð
+1

7
4

Ð
+2

5
10

Ð
+13

11

D17

C318

22

THERMAL DIODE

100K

CURLIM

CURLIM

22½ 1W1%

R209

3.3K

R327
22K

R319

R32

8

6

+15VAMP

Ð

A20.B

+

-15VAMP

5

4

33K

MUTE 2

R120

R313

3.3K

3.3K
MUTE 1

D31

D6

GRAPHIC +

EQ

mute

GRAPHIC -

OUTPUT1

560PC182

V+

D108B

Q108

BDW83C

R1108

.15

5W

R1112

.15

Q112

c184

5W

BDW84C

D109B

SMT

R176

22K

R177

10K

100K

R178

5401

R325

Q117

V-

D25

220K

R227

R226

Q15

+

+15VAMP

C1
.1µ

+

C2

-15VAMP

.1µ

C25

0.0047µF 250V AC

+

THERMAL DIODE

270½

D26

5550

220K

+

R228

V+

V-

VR1

7815

+

C35

22µF

+

C34

22µF

7915

L2

VR2

PRI COM

+

C76

22µF

D4

C77

+

22µF

R5 10K

GRAPHIC

S5.B

S5.A

R116
10K

22½ 1W1%

R136

K100

R419

22½ 1W1%

L100

1.5µH

GEQ F SW AMP
MU F SW AMP

Q303

PHONESOUT

22µF

C410

R339

470

C401

22µF

R311

47K

2

D310

Ð

A20.A

+ 1

3

R331

100K

+15VAMP

+

R323

C313

22

R321

5.6K

27K

+15VAMP

8

6

Ð

A17.B

+

5

4

-15VAMP

R322

2043

7

470K

NOTE: B1 IS CUT, AND B2 INSTALLED FOR 240V.

B2 IS CUT, AND B1 INSTALLED FOR 120V ONLY.

GEQ FSW

C5
.1µF

CLEAN

1N914

EM FSW

+

D312

H6B.A
H6B.B

H6B.C

H6B.D
H6B.E
H6B.F
H6B.G
H6B.H

H6B.I
H6B.J

V-

V+: +43VDC
V-: -43VDC

V+

H6A.A
H6A.B

H6A.C
H6A.D

H6A.E
H6A.F
H6A.G
H6A.H

H6A.I
H6A.J

speaker

R413

10½

1.8K smt 1/4w
R8

1.8K smt 1/4w
R16

1.8K smt 1/4w
R190

1.8K smt 1/4w
R191

speaker

SPKR GND

J8

SPKR GND

FOOT SW

J13

SPKR GND

line out /phones

SPKR GND

EFF SEND/ tuner

EFF RETURN

-24VDC

C4

+

22 50v

J7

Z11 Z12 Z13

J9

J4

J5

4.7K smt 1/4w
R17

R18

4.7K smt 1/4w

22U 50V

C520

R501

C3

1K

22

MMBT5550 NPN

9.1v9.1v

+

Z500

5.1v

Q500

Z501 Z502

C522

.1

+

24VJFETS

22

C521