Crest Audio CA12 Schematic

3097.SCH-1 - Fri Aug 29 15:32:24 2003

3097.SCH-2 - Fri Aug 29 15:32:58 2003

8

7

6

5

4

3

2

1

SERVO SEND CH A

VR SEND B

1

VR GND

2

VR RET B

3

J7A

22-29-2031

22-29-2031

D D

TO DISPLAY PCB

PHONEJACK STEREO

VR RET A

1

VR GND

2

VR SEND A

3

J7B

21

3

J1

NC3FD

- SIG IN

+ SIG IN

J3

STEREO/BRIDGE

R3

10K/1%

R5

10K/1%

48.7K/1%

SW1

123

C&K TS01

D2

1N4148D61N4148

R7

RETURN FROM VR

OUTPUT TO VR

1N4148

D4

33pF/50V

48.7K/1%

1N4148

D8

C5

33pF/50V

BALANCED INPUT/GAIN CH A

C8

R9

6

-

5

+

NJM5532M

+15.5V

R138

R129

3.9K

IC103A
LM339D

R128

10K

10K

2

D121
1N4148

R2

10K/1%

-

6

7

+

5

IC3B

+20.5V

R13

220K

C10

470pF/50V

R11

100K

7

C2

0.1/25V

84

IC1A
NJM5532M

3

+

1

2

-

IC1B

C1

0.1/25V

-20.5V

NJM5532M

2.2/5%/63V

R19

220K

1N4148

D15

R1

10K/1%

C12

C14

2.2/5%/63V

1N4148

SERVO/HIGH PASS

576/1%

NJM5532M

D16

R120

R21

10K

R23

2.7K
+20.5V

84

IC3A

2

-

3

+

TO MODULE A

ATT. VOLTAGE

1

-20.5V

+15.5V

312

5

+

4

-

-15.5V

ATTENUATOR DRIVER

OTA CH B

OTA CH B

1K/1%

+15.5V

R35

R33

1K/1%

R37
576/1%

0.1/25V

R38

R36

1K/1%

576/1%

C16

C19

0.22/16V

IGM VALUES WILL BE CONFIRMED AFTER PROTO BUILD

1
2
3
4
5
6
7
8 9

IC4

NE5517AD

R34
1K/1%

-15.5V

ATTENUATOR

C11

2.2/5%/63V

1N4148

D17

1N4148

R30

2.7K

16
15
14
13
12
11
10

D20

1N4148

R20

220K

2.2/5%/63V

D18

SERVO/HIGH PASS

R31

10K

C20

0.22/16V

OTA CH A

OTA CH A

R32
47K

C13

22/35V

R220

576/1%

R24 2.7K

6

-

5

+

NJM5532M

NJM5532M

C18

10/50V

C22

Z2

MLL4732

ATT. VOLTAGE

SERVO SEND CH B

TO MODULE B

R22

10K

D221

R229

3.9K

R228

10K

IC203A
LM339D

1N4148

2

+15.5V

R238
10K

7

+20.5V

IC5B

84

2

-

IC5A

1

3

+

+15.5V

312

5

+

4

-

-20.5V

-15.5V

R29

C C

GND

+20.5V

1 2

3 4

5 6

+20.5V

OTA CH B-15.5V+15.5V

-20.5V

OTA CH A

J8
CA-20H-2B-S

TO PWR SUPPLY

7 8

9 10

11 12

13 14

15 16

17 18

19 20

OTA CH A

R7-R9 IS BASED ON 700 WATTS @ 8 OHMS

Z1

GND

J2

NC3FD

-20.5V

-15.5V

OTA CH B

OUTPUT TO VR

RETURN FROM VR

+18V CH B

D3

1N4148

D5

D1

1N4148

C6

R8

33pF/50V

- SIG IN

3

+ SIG IN

10K/1%

10K/1%

R4

1N4148

R6

48.7K/1%

0.1/25V

C7

33pF/50V

R10

48.7K/1%

84

2

-

1

3

+

IC2A

NJM5532M

D7

1N4148

C4

-20.5V

BALANCED INPUT/GAIN CH B

+15.5V

21

B B

J4

PHONEJACK STEREO

470pF/50V

R12

100K

MLL4732

R14

220K

C9

R27

10K

C17

10/50V

+20.5V

5

6

NJM5532M

2.7K

D19

1N4148

R28
47K

C21

0.1/25V

C15

22/35V

C3

0.1/25V

+

7

-

IC2B

ATTENUATOR DRIVER

A A

IC103C
LM339D

+15.5V

IC103B

LM339D

IC203C
LM339D

+15.5V

IC203B
LM339D

-15.5V
R139

825K/1%

-

8

14

+

9

R141

2K21/.1%

R140

825K/1%

R142

2K21/.1%

-

6

1

+

7

33.2K/.1%.5W

243K/1%

1N4148

1N4148

243K/1%

D122

D123

33.2K/.1%.5W

R125

R126

R131

R130

33.2K/.1%.5W

R143
2K29/0.1%

R144
2K29/0.1%

33.2K/.1%.5W

R132

0.1/200V

0.1/50V

68.1/1%

22/35V

R133

Z100 MLL4752

CURRENT LIMITER

R155

IC103D
LM339D

+15.5V

11

+

13

10

-

R151

1M

R152
100K

R156

68.1/1%

MMBT5551

Q104

-15.5V

MMBT5401

Q105

R153
100K

R154
1M

D114

1N4148

D115

1N4148

68.1/1%
C110 0.001/50V

C118

22/35V

Z101 MLL4752

C115

0.1/50V

C113

0.1/200V

CLIP DETECTOR CH A DRIVER

-15.5V
R239

825K/1%

-

8

14

+

9

R241

2K21/.1%

R240
825K/1%

R242

2K21/.1%

-

6

1

+

7

33.2K/.1%.5W

243K/1%

1N4148

1N4148

243K/1%

D222

D223

R231

33.2K/.1%.5W

R225

R226

R230

33.2K/.1%.5W

R243
2K29/0.1%

R244
2K29/0.1%

33.2K/.1%.5W

R232

0.1/200V

0.1/50V

68.1/1%

22/35V

R233

Z200 MLL4752

CURRENT LIMITER

R255

IC203D
LM339D

R251

1M

R252
100K

R256

68.1/1%

MMBT5551

Q204

-15.5V

MMBT5401

Q205

R253
100K

R254
1M

68.1/1%

D214

1N4148

D215

1N4148

+15.5V

11

+

13

10

-

C210 0.001/50V

C218

22/35V

Z201 MLL4752

C215

0.1/50V

C213

0.1/200V

CLIP DETECTOR

8

7

6

5

4

3

+HI RL

C112

R159
576/1%

C114

2SC3645

R157

C117

R158

68.1/1%

Q106

Q108A
MMPQ6700

R161

68.1/1%

R163

8.25K/1%

D116

1N4148

D117

1N4148

R162

68.1/1%

Q108C
MMPQ6700

2SA1415

Q107

R160
576/1%

1.5K/1W

Q109
2SC3645

MMPQ6700

Q108B

R167

68.1/1%

68.1/1%

R164

8.25K/1%

68.1/1%

R168

68.1/1%

MMPQ6700

Q108D

Q110
2SA1415

R174

Q111
MMBT5551

R176

47

D100

R171

R172

R149
56K/3W

R178

2.7K

HER155

33pF/500V

R179

11K/1%/1W

R180

576/1%

R175

1.5K/1W

D101

C116

J101

CREST # ?

+LO RL

1

+HI RL

2

+IGM

3

+CLIP

4

+VA B

5

+VA C

6

GND

7

GND

8

NOT USED

9

FB

10

FB

11

-VA C

12

-VA B

13

-CLIP

14

-IGM

15

-HI RL

16

-LO RL

17

HER155

R177

47

Q112
MMBT5401

-HI RL

+HI RL

C212

R259
576/1%

C214

2SC3645

R257

C217

R258

68.1/1%

Q206

Q208A
MMPQ6700

R261

68.1/1%

R263

8.25K/1%

D216

1N4148

D217

1N4148

R262

68.1/1%

Q208C
MMPQ6700

2SA1415

Q207

R260
576/1%

1.5K/1W

Q209
2SC3645

MMPQ6700

Q208B

R267

68.1/1%

68.1/1%

R264

8.25K/1%

68.1/1%

R268

68.1/1%

MMPQ6700

Q208D

Q210
2SA1415

R274

Q211
MMBT5551

R276

47

D200

R271

R272

R249
56K/3W

R278

2.7K

HER155

33pF/500V

R279

11K/1%/1W

R280

576/1%

R275

1.5K/1W

D201

C216

J202

CREST # ?

+LO RL

1

+HI RL

2

+IGM

3

+CLIP

4

+VA B

5

+VA C

6

GND

7

GND

8

NOT USED

9

FB

10

FB

11

-VA C

12

-VA B

13

-CLIP

14

-IGM

15

-HI RL

16

-LO RL

17

HER155

R277

47

Q212
MMBT5401

-HI RL

CH B DRIVER

CREST AUDIO

100 EISENHOWER DRIVE
PARAMUS, NJ 07652

Title

CA12 PREAMP

Size Document Number Rev

D

PREAMP12.CA

2

Date: Sheet

1

0 0Wednesday, May 17, 2000

of

8

D D

7

6

C46

0.047/250V

2SC3281

Q38

5

2SC3281

Q40

2SC3281

Q42

4

2SC3281

Q44

2SC3281

Q36

3

D41

HER155

C37
150pF

2SC2336BQ

Q20

R162

2

+135V.

C44

1K

22/160V

C41

1.5/250V

1

J4-M

PIGTAIL

1
2
3
4
5

R93

51/1W/2%

Q16
2SA1006BQ

R14

R91
220

J1-M

1
2

C C

3
4
5
6
7
8

9
10
11
12
13
14
15
16
17

R100

10/1W

CUSTOM MOLEX

B B

PTC15LB/250

51/1W/2%

C28

1200pF

VR2

R90
510

R92

C31

330PF

Q15
2SC2336BQ

22

TIP117

R94

4.7/1W

C29

0.1/100V

D30
HER155

R143
51/0.5W

C30

100/6.3V

330PF

150/1W

150/1W

R103

R102

C39

D29
HER155

Q17

C38

330PF

R142
51/0.5W

D28

R89

4.7/1W

HER155

R139

10/1W

Q22
2SC2336BQ

10/1W

R97 13K

C33

0.0047/100V

R101
100/2W

C32

0.0047/100V

R96 13K

10/1W

Q21
2SA1006BQ

R138
10/1W

R147

R146

1N4148

1N4148

R99
39K

R163
10/1W

Q24
2SC3281

2.2/1W

R104
22/2W

R123

Q26
2SC3281

R122

0.33/5W

R125

2.2/1W

R151

0.2/5W

Q28
2SC3281

R124

0.33/5W

R127

2.2/1W

R153

0.2/5W

Q30
2SC3281

R126

0.33/5W

R129

2.2/1W

R155

0.2/5W

Q32
2SC3281

R128

0.33/5W

R131

2.2/1W

R157

0.2/5W

Q34
2SC3281

R130

0.33/5W

D33
HER155

R149

10/1W

D35
HER155

51/0.5W

R145

R120
20K/1W

Z9

1N5927C

R137
100/0.5W

R135
1K

D39
1N4004

C35
47/16V

D43
HER155

R133

3.9K

D37

D36

R109

2.2/1W

Q23
2SA1302

R98
39K

R164

10/1W

C45

0.047/250V

R110

0.33/5W

Q25
2SA1302

R111

2.2/1W

R112

0.33/5W

Q27
2SA1302

R150

0.2/5W

2SA1302

Q37

R113

2.2/1W

R114

0.33/5W

Q29
2SA1302

R152

0.2/5W

2SA1302

Q39

R115

2.2/1W

R116

0.33/5W

Q31
2SA1302

R154

0.2/5W

2SA1302

Q41

R117

2.2/1W

R118

0.33/5W

Q33
2SA1302

R156

0.2/5W

2SA1302

Q43

D32
HER155

D34

HER155

R148

10/1W

2SA1302

Q35

Z8

1N5927C

R119
20K/1W

R136
100/0.5W

2SA1006BQ

Q19

C34
47/16V

R132

3.9K

D38
1N4004

R134
1K

D42
HER155

R161

1K

C36
150pF

D40

HER155

R159

2.2K/0.5W

D45

BYV79

220/80V

C42 2200pF

220/80V

D44

BYV79

R158

2.2K/0.5W

C43
22/160V

R141

390/5W

+67V.

C48

C47

C50

2.2/100V

C49

2.2/100V

-67V.

R140
390/5W

OUT

J6-M

PIGTAIL

J5-F

PIGTAIL

1
2

5
4
3
2
1

C40

1.5/250V

-135V.

1
2
3

J7

PIGTAIL

A A

IC5

32

1

LM35DP

R165

2.2K

CREST AUDIO

150 Florence Ave.
Hawthorne, NJ. 07506
Title

CA-12 OUTPUT PCB

Size Document Number Rev

21C0929

C

8

7

6

5

4

3

Date: Sheet

2

of

0 1Wednesday, May 17, 2000

1