Crest fcv220, fcv440 schematic

Schematicset

FCV220&FCV440Seriespoweramplifiers

1.Preampdriver

2.PreampdriverOTA

3.Powersupplyinterconnects

4.Powersupplyandfandriver

5.Outputstage

6.NexSyspreampdriver

7.NexSyspowersupply

8.NexSysoutputstage

8

7

6

5

4

3

2

1

R7

1N5930

Z1

C1 0.1/100V

D1

1N4148

R24

NOTE 2

330pF

C22

R10 470

C24

150pF

2.7K/2W

C5 30pF

-

2

+

3

8 4

1

IC1A

NE5532

1N5930

R6

100K

90.9K/1%

C8

0.1/100V

R2

15

+

14

-

IC2B
STK3152

C10 15pF

13121011

R17 100

C20

330pF

R18 100

1
2
3
4
5
6
7
8

J8

CH A MODULE

CH A OUT

R8

R14

Z2

VR1

100K/1W/2%

5K

R12

6.65K/1%

C15

100/100V

C12

0.47/250V

C16

100/100V

2.7K/2W

R19

4.7/1W

C17

0.1/100V

0.1/100V
C18

R20

4.7/1W

T90N5D12-12

J9

1
2

RELAY

CH A MODULE

RLY1

CH B OUT

CH B MODULE

10K/1%

10K/1%

R3
NOTE 1

R23

R22

D3

1N4148

R21
NOTE 2:

D5

1N4148

D7

1N4148

C3

30pF

D D

CH A OCTAL

1
2
3
4
5
6
7
8

J3

C2

0.1/100V

1
2

BAR1

3
4
5
6

Z3

1N5359

C C

INPUT BARRIER

RLY2

T90N5D12-12

D8

1N4148

D2

1N4148

C6 30pF

R26

1
2

B B

3
4
5
6
7
8

SW1

MSSA2350

10K/1%

R27

10K/1%

D4

1N4148

D6

1N4148

R25

NOTE 2

-

6
5

+

IC1B

NE5532

7

J4

CH B OCTAL

R3,R4

NOTE 1:

R4
NOTE 1

FCV440 = 13.75K/1%
FCV220 = 15.1K/1%

R28
NOTE 2

C4

30pF

VR2
5K

C7

0.1/100V

90.9K/1%

R1

R5

R21,R24,R25,R28

NOTE 2:

FCV440 = 27.18K/1%
FCV220 = 19.6K/1%

100K

R9 470

C21
330pF

IC2A

STK3152

R11

6.65K/1%

C13

0.47/250V

1
2

C9

15pF

349

+

-

C19

C23

150pF

65

8

7

R15

100

R13 100K/1W/2%

R16 100

330pF

1
2
3
4
5
6
7
8

J7

CH B MODULE

NOTE 3

R29

R30
NOTE 3

SUPPLY GND
SUPPLY GND

A A

R29,R30

R7, R8 CHANGED FROM 4.7K TO 2.7K ON 4/8/92

8

7

NOTE 3:

FCV440 = 680/10W
FCV220 = 520/10W

6

CREST AUDIO INC.

150 Florence Avenue
Hawthorne, NJ 07506
Title

PREAMP/DRIVER FCV220/FCV440

Size Document Number Rev

21B1241

B

5

4

3

Date: Sheet of

2

1 1Thursday, May 18, 2000

1

8

D D

7

6

5

4

3

2

1

R10 470

R32
100K

3
2

5
6

4.7/35V

+24V

84

+

-

OPA2604

-24V

+24V

200/1W

R38

6.8K

+

- IC2B

OPA2604

C25

IC2A

1

R7

7

R44

3.3K

NE5517AN

R47

4.7K

R39
10K

R40
10K

IC3

1.5K

6.8K

R41

R45

1234567

R33

100K

4.7/35V

10/16V/BP

10111213141516

C26

8

7

C11

10/16V/BP

100/100V

100/100V

65

C24
150pF

R17 100

R18 100

100K/1W/2%

C15

C16

C23

150pF

C20

330pF

R14

R15
100

R13 100K/1W/2%

R16 100

4.7/1W

C17

0.1/100V

0.1/100V
C18

4.7/1W

C19

330pF

1
2
3
4
5
6
7
8

J8

CH A MODULE

CH A OUT

CH A MODULE

RLY1

R19

T90N5D12-24

26-48-1036

JP?

J9

1

1
2

2
3

3

HEADER 3

CH B OUT

R20

CH B MODULE

RLY2

T90N5D12-24

SUPPLY GND
SUPPLY GND

1
2
3
4
5
6
7
8

J7

CH B MODULE

C22

330pF

13121011

15

+

14

-

IC4B
STK3152

R2

C12

1/63V

C14

90.9K/1%

C8

0.1/100V

R12

C10 15pF

6.65K/1%

Z1

1N5353

R42
47K

8 9

R43
47K

-24V

-24V

90.9K/1%

C7

0.1/100V

R8
200/1W

1N5353

Z2

R9 470

C21
330pF

349

1

+

2

-

IC4A
STK3152

R1

R11

6.65K/1%

C13

1/63V

C9
15pF

C1 0.1/100V

1
2
3

J3

CH A OCTAL

4
5
6
7
8

10K/1%

R23

D3

1N4148

R22

10K/1%

J1

CH A

BAR1

1
2
3
4
5
6

ANALOG GND
ANALOG GND

DATA CH A
DATA CH B

DIGITAL GND
DIGITAL GND

INPUT BARRIER

+15 V

+24V

-24V

26-48-1116

CH B OCTAL

CH B

1
2
3
4
5
6
7
8

9
10
11

J6

1

2

3

4

5

6

7

8

J4

+24V

-24V

J2

C C

ATTENUATE CH A
ATTENUATE CH B

B B

SW1

R3
NOTE 1

MSSA2350

R?
27

R21
NOTE 2:

R4
NOTE 1

OC1
4N25

CH B ATTN CH A ATTN

10K/1%

10K/1%

D1

1N4148

D5

1N4148

D7

1N4148

C3

30pF

C2

0.1/100V

R26

D4

NOTE 2

1N4148

R28

R27

-24V

R?
27

D8

1N4148

2
3

+24V

84

-

+

-24V

+24V

+24V

NOTE 2

C5 30pF

C30

CP

1

IC1A

OPA2604

C31

CP

D2
1N4148

D6

1N4148

C4

30pF

OC2
4N25

C6 30pF

R25

NOTE 2

6

-

5

+

OPA2604

IC1B

R6

220K

C29

220pF

JP1

VR1
5K

R34

3.3K

R35

750

R36

750

R37

1.5K

C28

4.7K

220pF

R46

R5

220K

JP2

7

VR2

5K

R24

NOTE 1:

FCV440 = 13.75K/1%
FCV220 = 15.1K/1%

NOTE 2:

FCV440 = 27.18K/1%
FCV220 = 19.6K/1%

A A

CREST AUDIO INC.

100 Eisenhower Drive
Paramus, NJ 07652
Title

OTA PREAMP/DRIVER FOR FCV SERIES

Size Document Number Rev

21C1383

C

8

7

6

5

4

3

Date: Sheet of

2

1 1Thursday, May 18, 2000

1

00

8

D D

7

6

5

4

3

2

1

OUTPUT 'A' OUTPUT 'B'PREAMP

26-03-4071

J2A

1234567

C C

J5

1234567891011

26-03-4020

J9

1

2

J2B

1

2

3

4

5

6

7

J6

123456789

B B

26-03-4111

10

11

1

2

3

J4

26-03-4030

J2

7
6
5
4
3
2
1

POWER SUPPLY

J3

7
6
5
4
3
2
1

A A

CREST AUDIO
100 EISENHOWER DRIVE

PARAMUS, NJ 07652
Size Document Number Rev

26A1816 01

A

8

7

6

5

4

3

2

Date: Sheet of

0 0Thursday, May 18, 2000

1

8

7

6

5

4

3

2

1

26-48-1025

22-02-2085

R44

26-48-1025

26-48-1055

26-48-1055

1K

J2

TEMP SENSOR POWER

5

TEMP SENSOR OUTPUT

4

GROUND

3

A CLIP-

2

SPKR LEVEL A (DC PROT)

1

J4

RELAY B

2

RELAY A

1

J1

A CLIP-

8

GROUND

7

A CH. PROTECT+

6
5

B CLIP-

4

GROUND

3

B CH. PROTECT+

2
1

J3

TEMP SENSOR POWER

1

TEMP SENSOR OUTPUT

2

GROUND

3

B CLIP-

4

SPKR LEVEL B (DC PROT)

5

J5

FAN DRIVE V+

1

GROUND

2

R25

100/2W

D D

IC1B
LM614

7

+

-

23.7K/1%

R28

5

1K

6

R30

R32

1K/1%

Z3

1N5355A

R29

R31

1K/1%

C17

10/50V

D5

1N4148

IC1A

413

LM614

3

+

1K

R33

23.7K/1%

1

2

-

1N4148

D6

CH. ACH. B

MPSA13

R27

100K

Q5

R41

C C

1.5K

R39

1.5K

47/1W

R37

2N5401
Q3

R23

SEE CHART

D3
1N4148

1N5920

2.2K

R1

10K

MAC97

D1 1N4148

10

R15 10K

TR1

IC1C
LM614

R13

R11

1K

-

11

+

12

330K

R17
22K

C14

470/25V

R9

10K

R35

2N5551

Q1

100/25V

C18

Z5

R4

2.2K

R5

499/1%R6499/1%

9

IC1E

8

13

R7

1K/1%

1K/1%

LM614

R8

IC2
LM317

2 3

D8

1N4148

D7

1N4004

R12

1K

R10
10K

1

R26

442/1%

1K

R43

R34

2.2K

Z1

CH. A

1N960

Z2

CH. B

1N960

CH. ACH. B

-

15

+

14

R14

330K

IC1D

LM614

16

470/25V

D2 1N4148

R16 10K

C15

MAC97

TR2

R18

22K

R21

2.2K

R22

2.2K

2N5551

C19

100/25V

R40

R2

10K

Q2

2.2K

R36

2N5401

Q4

1.5K

R38

47/1W

R42

1.5K

R24

SEE CHART

Z4

1N5920

D4

1N4148

B B

0.15/400V
C1

TO C2+

SEE CHART

P1
PLUG AC MALE

SW1

BR354W

BR1

GND
TO C2-/C3+
TO C2-/C3+

(SEE CHART)

GND

TO C3-

T1

SEE CHART

A A

8

7

3A/MINI

F1

BR2

RS202

C11

1000/25V

REF FCV220 FCV440

R23,R24

C2,C3

SW1

T1

6

5

4

1.8K/5W 3.9K/5W

15,000UF/50V

10,000UF/75V

4.00 AMP 6.00 AMP

CREST #22B1297 CREST #22B1295

3

CREST AUDIO INC.

150 Florence Ave.
Hawthorne, NJ 07506
Title

FCV220/FCV440 POWER SUPPLY/FAN DRIVER PCB

Size Document Number Rev

21C1230

C

Date: Sheet of

2

1 1Thursday, May 18, 2000

1

01

8

7

6

5

4

3

2

1

D1 1N4004

Z1

D D

Z2

1N4735A

1N4749A

1n/50V

C1
100/6.3V

D9

1N4148

C C

+ 65 VNL

+ DRIVE

+ DRIVE
SPEAKER RAIL
SPEAKER RAIL

- DRIVE

- DRIVE

- 65 VNL

8
7
6
5
4
3
2
1

J1

INPUT

D10

1N4148

B B

PTC15LB/250

1n/50V

Z3

1N4749A

Z4

1N4735A

R47

20K

R48

20K

VR1

C7

C6

R46

10K

R49

10K

R5

1.2K

R6
390

Q1

2N5551

1N4148

C2

0.1/100V

TIP110

1N4148

Q2

2N5401

R1

NOT USED

D3

Q3

D4

10n/50V

R2

NOT USED

C9

10n/50V

100/1W

C8

R7

Q4
2SC2336

10/1W

150/1W

150/1W

R9

10/1W

Q5
2SA1006

R8

R11

R10

470

470

R3

R4

Q6
2SC3281

R12

2.2/1W

R14
51/2W

R13

2.2/1W

Q7
2SA1302

Q8
2SC3281

R42

2.2/1W

R15

4.7/2W

R16

4.7/2W

R17

0.33/5W

R18

0.33/5W

R45

2.2/1W

Q9

2SA1302

NOTE 1 FCV220 = OMIT Q20,Q21

FCV220 = OMIT R42,43,44,45

Q20
2SC3281

2.2/1W

R43

0.33/5W

R44

0.33/5W

2.2/1W

Q21
2SA1302

R19

R20

2SC3281
Q10

R21

0.33/5W

R22

0.33/5W

Q11
2SA1302

R34

15K

R30

100K

R36

274/1%

R37

274/1%

R23

100K

R35
15K

R38

100K

R39

100K

2N5401

Q16

R40

100/1%

R41

100/1%

Q17

2N5551

Q18

2N5551

Q19

2N5401

R31

15K

R24

15K

Q14
2N5401

2N5401

R32

100K

R25

100K

2N5551

Q12
2N5551

Q15

D7

1N4004

D8

1N4004

Q13

R26
220

D5

FR204

D6

FR204

C3

0.1/100V

L1 2uH

R100 1/2W

C4

0.1/100V

2.2/2W

0.047/630V

+65VNL

OUT

R28

C5

GROUND

-65VNL

D2 1N4004

IC2

32

1

6

LM35DP

R29
1K

CREST AUDIO INC.

150 Florence Ave.
Hawthorne, NJ 07506
Title

FCV220/FCV440 OUTPUT STAGE

Size Document Number Rev

21B1294 (REF. PCB # 26B1100)

B

5

4

3

Date: Sheet of

2

1 1Thursday, May 18, 2000

1

TEMP SENSOR POWER
TEMP SENSOR OUTPUT
TEMP SENSOR GROUND

A A

CLIP (-)

SPEAKER RAIL

J2

1
2
3
4
5

CLIP/TEMP

8

7

8

7

6

5

4

3

2

1

D9

1N4004

-RET

1

A GND

2

J11

3
4
5
6
7
8

1
2
3
4
5
6

7
6
5
4
3
2
1

A DATA
+24V
+15V
+RET
+IN

-IN

A GND
A -IN
A +IN
B +IN
B -IN
B GND

A GND
A GND
A OPTO
B OPTO
+15V
DATA A
DATA B
+24V

-24V
D GND
D GND

D D

J3
CH A OCTAL

BAR1

IN BARRIER

C C

C1

10/35V/T

26-48-1075

MSSA2350

B B

-RET

1

D GND

2

B DATA

3

-24V

4

+15V

5

+RET

6

+IN

7

-IN

8

J4
CH B OCTAL

D10

1N4004

R23

19.6K/0.1%

R22

19.6K/0.1%

SW1

NOTE 1

R21

D3

1N4148

19.6K/0.1%

19.6K/0.1%

10/35V/T

R26

R27

NOTE 1

1N4148

D5

1N4148

1N4148

C3

30pF

R8
NOTE 1

R28

C2

D1

D7

R6

100K

1N4148

D4

1N4148

D8

C4

30pF

R24

NOTE 1

C5 30pF

84

2

-

3

+

OPA2604

1N4004

1N4004

1N4148

D6
1N4148

VR2
5K

D12

D11

D2

1
IC1A

VR1
5K

C6 30pF

R25

NOTE 1

-

6

+

5

90.9K/1%

0.1/100V

IC1B

OPA2604

90.9K/1%

C7

0.1/100V

C8

7

R2

6.65K/1%

NOTE 1

R1

330pF

R12

C12

C22

R10

470

IC2B
STK3152

C10 15pF

10/16V/BP

R9

470

C21
330pF

IC2A
STK3152

R11

6.65K/1%

15
14

C14

+

-

1
2

C9

15pF

13121011

349

+

-

8

C24

150pF

R17 100 C20

R18 100

C15

100/100V

C16

100/100V

C23

150pF

65

7

R16 100

330pF

R14

100K/1/2W/1%

0.1/100V

0.1/100V

C19

330pF

R15
100

0C2

VTL5C6

R13 100K/1/2W/1%

4.7/1W

C17

C18

0C1

VTL5C6

R19

R32

220

R34

750

R31

220

R33

750

R20

4.7/1W

CH A MODULE

T90N5D12-12

CH A
CH B

T90N5D12-12

CH B MODULE

1
2
3
4
5
6
7
8

J8

RLY1

J9

2
1

RELAY

RLY2

1
2
3
4
5
6
7
8

J7

CH A OUT

CH A MODULE

CH B OUT

CH B MODULE

SUPPLY GND
SUPPLY GND

NOTE 1:

R5

REFERENCE DES

R21,R24,R25,R28

A A

38.3K/0.1% 53.6K/0.1%

30pF 30pFC3,C4,C5,C6

FCV440FCV220

100K

C13

NOTE 1

R8 2.2/1W 2.2/1W

C12,C13 0.47UF/250V 0.47UF/250V

8

7

6

5

4

C11

10/16V/BP

CREST AUDIO INC.

100 EISENHOWER DR.
PARAMUS, NJ 07652
Title

PREAMP/DRIVER FOR NEXSYS COMPATIBLE FCV

Size Document Number Rev

21B1703

B

3

Date: Sheet of

2

1 1Thursday, May 18, 2000

1

02

8

D D

IC1B

LM614

5

+

7

6

-

CH B

19K60

R3

C3

0.1/25V

7

R1
1K

R5

1K0

R2

1K

R6

1K0

R4
19K60

3
2

6

J7
26-48-1045

123

4

R51

0

D1

1N4148

413

IC1A

LM614

+

-

D2

1

1N4148

CH A

C2

10/50V

MPSA13

D3

1N4148

Q1

R7

100K

IC3
LM317T

IN OUT

ADJ

1

R40

2K210

5

1N4001

442R0

4

3

2

1

R52

100R

R48

100R

D11

R18
2K2

1N4148

D10

R19
2K2

1N4148

C4

10/25V

R10
4K7

84

3

+

1

2

-

IC2A

LM358

R12
47K

Z2

1N5920

6.2V6.2V

CH A TEMPCH B TEMP

R16
22K

D7

1N4148

R32
10K

C5

10/25V

R14
2K2

R9

4K7

84

3

R31

+

1

D4

23

IC4A

LM358

R11
47K

Z1

10K

2

-

1N5920

R13

R15

2K2

1N4148

22K

D6

R8

R17
2K2

26-48-1075

CH A

TEMP SENSOR POWER

1

TEMP SENSOR OUTPUT

2

TEMP SENSOR GND

3

CLIP A

4

IGM A

5

SPKR LEVEL A

6

ANALOG GND

7

J2

C C

1N5920

1N4001

R21

Z5

20/1W

R61
390R

D17

MJD127

Q3

R59

2K2

7

IC4B

R23

LM358

5.1K/2W

470/25V

R55

10K

5

+

6

-

100R

R53

1N4001

IC1C

LM614

D5

10

R25

TR1

MAC97A

Z11

C6

1N5920

C7

470/25V

18K

330K

R29
1K

-

11

+

12

499R0

R27

R33

1K0

R35

IC1E
LM614

R37

2K2

9

8

13

499R0

R30

1K

CH "A"CH "B"

IC1D
LM614

R36

+

14

-

15

R28

330K

R34
1K0

D8

16

1N4001

R54

100R

R26

18K

470/25V

C8

MAC97A

TR2

470/25V

R56
10K

5

+

7

6

-

IC2B

LM358

Z12

C9

1N5920

R24

5.1K/2W

R62

390R

R60

2K2

1N4001

R22
20/1W

Q2
MJD127

D18

Z6
1N5920

R20

2K2

D15

1N4148

D16

1N4148

26-48-1075

CH B

26-48-1025

J4

26-48-1036

TEMP SENSOR POWER

1

TEMP SENSOR OUTPUT

2

TEMP SENSOR GND

3

CLIP B

4

IGM B

5

SPKR LEVEL B

6

ANALOG GND

7

J3

FAN V+

1

AUX GND

2

J5

1

RELAY CH A

2

RELAY CH B

3

RELAY GND

D14

1N4148

R42
1K/1/2W

B B

SW1

SEE CHART

P1
PLUG AC MALE

0.15/400V
C1

BR352W

(SEE CHART)

TO C2+

BR1

R49

470R/10W

GND
TO C2-/C3+
TO C2-/C3+
GND

R41

1K/1/2W

R45
1K/1/2W

R46

1K/1/2W

50R/10W

TO C3-

C10

1000/25V

R50

470R/10W

1N5348

1N5348

Z7

Z9

1N5348

REF FCV220 FCV440

Z8

Z10

1N5348

C2,C3

SW1

T1

15,000UF/50V

10,000UF/75V

4.00 AMP 6.00 AMP

CREST #22B1297 CREST #22B1295

F1

T1

SEE CHART

A A

3A/MINI

RS202

BR2

D17, D18 ARE R43, R44 ON 7/29/93 SILKSCREEN

D9

1N4148

R47

26-48-1115

J1

8
7
6
5
4
3
2
1

52011-0810

1
2
3
4
5
6
7
8
9
10
11

J6

CH B STATUS ­CH B STATUS +
CH B CLIP LED +
CH B CLIP LED ­CH A STATUS ­CH A STATUS +
CH A CLIP LED +
CH A CLIP LED -

ANALOG GND
ANALOG GND
ATTENUATE CH A
ATTENUATE CH B
+15 V
DATA CH A
DATA CH B
+24 V

-24 V
DIGITAL GND
DIGITAL GND

CREST AUDIO
100 EISENHOWER DRIVE

PARAMUS, NJ 07652
Title

FCVNXS.PWR

Size Document Number Rev

21C1666

C

8

7

6

5

4

3

Date: Sheet of

2

0 0Thursday, May 18, 2000

1

02

8

7

6

5

4

3

2

1

R1

NOT USED

D1
1N4004

D D

R46

7.5K

Z1

1N4742A

C1
100/6.3V

C2

0.1/100V

TIP 110

R6
390

PTC15LB/250

R5

1.2K

Q3

1N4148

+ 65 VNL

+ DRIVE

+ DRIVE
SPEAKER RAIL
SPEAKER RAIL

- DRIVE

- DRIVE

- 65 VNL

INPUT

8
7
6
5
4
3
2
1

J1

1N4148

D10

R47
10K

Z2

1N4749A

R55

1.2K

R56

1.2K

VR1

C C

D2
1N4004

Z4

1N4742A

R49

7.5K

Z3

1N4749A

R48

10K

R2

NOT USED

10n/50VD9

C9

10n/50V

R3

470

+65VNL

Q4
2SC2336

D3
1N4148

R8

10/1W

Q1

2N5551

R10

150/1W

R7

R11

Q2

2N5401

100/1W

150/1W

C8

Q5
2SA1006

R9

10/1W

D4
1N4148

Q6
2SC3281

R12

2.2/1W

R14
51/2W

R13

2.2/1W

Q7
2SA1302

R15

4.7/2W

R16

4.7/2W

Q8
2SC3281

R17

0.33/5W

R18

0.33/5W

Q9
2SA1302

2.2/1W

R20

2.2/1W

Q10
2SC3281

R52

0.33/5W

R53

0.33/5W

Q11
2SA1302

R51

2.2/1W

2.2/1W

R50

R19

Q20
2SC3281

R21

0.33/5W

R22

0.33/5W

Q21
2SA1302

FR204

FR204

C3

0.1/100V

D5

L1 2uH

R100 1/2W

R54

2.2/2W

D6

C4

0.1/100V

0.047/630V

OUT

C5

GROUND

-65VNL

R4

470

-16V

R30

33.2K/0.5W

R26

3.32K

33.2K/0.5W

R34

2.87K

R38

+ HIGH RAIL

R42

2.4K/2W

+16V

IC1A
LM339N

-

4

2

+

5

3 12

R24 10K

Z5
1N5930

- HIGH RAIL

EMITTER PNP

EMITTER NPN

OUTPUT

Z6

1N5930

1.5K/5W

-16V

R43

R50,R51,R52,R53FCV220 = OMIT Q20, Q21,

3/28/94 CHANGED 33.2K/1W TO 33.2K/0.5W

5-4-94 CHANGED C6,C7 FROM .001UF/50V TO R55,R56 AT 1.2K.

R31

33.2K/0.5W

D11

1N4148

D12

1N4148

R32

33.2K/0.5W

R33

R35

2.87K

33.2K/0.5W

R39

33.2K/0.5W

R36

3.83K

R37

3.83K

33.2K/0.5W

R40

R41

-16V

R27

3.32K

33.2K/0.5W

R45

750K/1%

R28

3.74K

CLIP
IGM

GND

J2

1
2
3
4
5
6
7

TEMP SENSOR POWER

B B

TEMP SENSOR OUTPUT
TEMP SENSOR GROUND

SPEAKER RAIL

CLIP/TEMP

IC2

32

1

LM35DP

R23
1K

14

IC1C

LM339N

CLIP DETECTOR

1

IC1B
LM339N

-

8

+

9

-

6

+

7

R25

10K

R44

750K/1%

-

10

13

+

IC1D

LM339N

A A

CURRENT LIMITER

11

R29

3.74K

CREST AUDIO INC.

100 EISENHOWER DR.
PARAMUS, NJ
Title

FCV220/FCV440 NEXSYS OUTPUT STAGE

Size Document Number Rev

C

8

7

6

5

4

3

Date: Sheet of

2

1 1Thursday, May 18, 2000

1