Alto ACL4 Service Manual

Service Manual

Model: ACL4

QUAD/COMPRESSOR/LIMITER

www.altoproaudio.com

Version: 1.1

CONTENTS

1. Specification

2. Block Diagram

3. Schematic Diagram

4. Printed Circuit Board

5. Wiring Diagram

6. Test Procedure

7. Electrical Parts List

8. Exploded Views & Mechanical Parts List

9. Troubleshooting

10. Notes

SPECIFICATIONS FOR ACL4

AUDIO INPUT

Connectors XLR and 1/4” TRS (Pin 2 and Tip hot)

Type Electronically balanced/unbalanced, RF filtered

Impedance Balanced >50Kohm, Unbalanced>25Kohm

Nominal operating level +4dBu/-10dBV switchable

Max input level >+24dBu balanced and unbalanced

CMRR Typically>50dB at 1KHz

AUDIO OUTPUT

Connectors XLR and 1/4” TRS (Pin 2 and Tip hot)

Type Electronically balanced/unbalanced, RF filtered

Impedance Balanced 120ohm, Unbalanced>60ohm

Max output level >+21dBu,+20dBm balanced and unbalanced

SYSTEM SPECIFICATIONS

Bandwidth 22HZ to 22KHz, +0/-0.5dB

Frequency Response 0.35Hz to 200kHz,+0/-3dB

Noise >-95dBu, unweighted, 22Hz to 22kHz

THD

IMD <0.1% Typical SMPTE
Crosstalk

Stereo Coupling True RMS detection

<0.008% Typical at +4dBu, 1kHz, unity gain
<0.04% Typical at +20dBu, 1kHz, unity gain

<-100dB, 22Hz to 22Khz

COMPRESSOR SECTION

Type Interactive Compressor (Interactive Knee Adaptation)

Threshold variable (-40dB to +20dB)

Ratio

Threshold Characteristic variable (Interactive or Hard Knee)

Manual Attack Time variable (0.5ms to 100ms / 20dB

Manual Release Time variable from 0.05 ms to 5s / 20dB

Auto Attack Time Typical 15ms at 10dB, 5ms at 20dB, 3ms at 30dB

Auto Release Time Program dependent, typical 125dB/s

Output level variable (-20dB to +20dB)

variable (1:1 to

∞:1)

PEAK LIMITER SECTION

Type Interactive Gain Control Peak Limiter

Threshold variable (+4dB to OFF (+22dBu))

Ratio

Stage 1 Limiter Type Clipper

Attack Time “zero”

Release Time “zero”

Stage 2 Limiter Type Program Limiter

∞:1

Attack program dependent, typ. <5ms

Release Program dependent, typ. 20dB/s

FUNCTION SWITCHES

SMART

CONTOUR Allows for frequency dependent detection.

I/O METER

BYPASS Relay controlled hard-bypass

OPERATING LEVEL

COUPLE

Enables the “Interactive Knee Adaptation”
characteristics.

Switches between input and output for the Level
Meter.

Changes the internal reference level from +4 dBu
to –10dBu.
Linking channels 1&2 or 3&4 for stereo operation.
Channel 1 (or 3) becomes master.

INDICATORS

GAIN REDUCTION

INPUT/OUTPUT LEVEL

Peak Limiter Threshold 1 LED for indication of limiter function.

Function switch LED indicator for each

8 element LED display:
1/3/6/10/15/20/25/30 dB.

8 element LED display:

-24/-18/-12/-6/0/+6/+12/+18 dB

POWER SUPPLY

USA/Canada ~120VAC, 60Hz
U.K./Australia ~240VAC, 50Hz

Mains Voltages

Fuse

Power consumption 14Watts

Mains Connection Standard IEC receptacle

Europe ~230VAC, 50Hz

General Export Model

100-120VAC : 630mA (SLOW-BLOW)
200-240VAC : 315mA (SLOW-BLOW)

~100-120VAC,
~200-240VAC, 50-60Hz

PHYSICAL

Dimension W(483.0)*D(198.0)*H(44.2) mm

Net Weight 3.3Kg

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R114

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OUTPUT GAIN

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240K

2

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R122

R121

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R106

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R110

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OUTPUT GAIN

COMPRESSOR/LIMITER

R284

CH3-LEVEL

CH4-LEVEL

CH3- REDUCTION

CH4- REDUCTION

CH3-LEVEL

CH4-LEVEL

CH3- REDUCTION

CH4- REDUCTION

CH3+ CH4

CH3+ CH4 SCH

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RD

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R140

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R137

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CH3-LEVEL

CH1-LEVEL

CH2-LEVEL

CH1- REDUCTION

CH3- REDUCTION

CH4-LEVEL

CH3-LEVEL

CH3- REDUCTION

FP-LED

FP-LED SC H

C16

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CH4- REDUCTION

CH1-LEVEL

CH2-LEVEL

CH1- REDUCTION

CH2- REDUCTION

CH4- REDUCTION

CH1-LEVEL

CH2-LEVEL

CH2- REDUCTION

CH1- REDUCTION

2K2

R159

1K

0K

R156

R157

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PS-22E85L

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R155

C19

100P

43K

R153

R152

240K

2

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VR5

B10K

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D9A

DA202K-2/ 1

IC26-1

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R150

THRESHOLD

47K

R134

47K

R135

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COMPRESSOR/LIMITER

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R130

1K5 1%

D1A

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R129

523K 1%

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R126

10K

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3

R132

R131

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TL064

12

R128

560K

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R127

VR4

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PEAK LIMITER

THRESHOLD

D6B

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R125

D5

BAS16

47K

R123

47K

R124

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CH1- REDUCTION

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R151

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R166

10K

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3

VR8

THRESHOLD

PEAK LIMITER

R164

47K

D11

BAS16

47K

R163

A

-15V

VER040820

31 of

EASON YANG

RevisionModel No:

Drawn By:

Sheet

ACL4

16-Sep-2004

Size

DA202K-2/ 1

-15V

IC2 3C

SW 4B

ACL4 CH1+CH2.Sch

A3

File:

Date:

IC26-2

TL064

PS-42E85L

CH1-MASTER

COUPLE

SW 4A

PS-42E85L

COUPLE

CH1-MASTER

C24

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DA202K-2/ 1

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4.7UF/100V

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R179

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R175

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R172

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9

10

47K

R170

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R168

560K

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SW PS-22E85L

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2

3

SW 7A

SW PS-22E85L

1 2 3 4 5 6 78

CH2

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A

D

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VR15

VR11

B10K

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8

7654321

OUTPUT GAIN

COMPRESSOR/LIMITER

R198

R196

R195

1K

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R200

R199

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R197

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CH3

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IC27E

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IC26E

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LD51

THRESHOLD

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20K

LIMITER

DA204K-2/ 1

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RD

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R207

D17

BAS16

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C27

R189

100P

6K8

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COMPRESSOR/LIMITER

DA202K-2/ 1

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SW 8B

PS-22E85L

4

5

INTERACTIVE

43K

R193

R191

240K

2

VR9

B10K

THRESHOLD

47K

R186

IC31A

TL064

6

2K

R194

8

9

10

3K

R192

6K2

R190

3

R262

IC2 6B

TL064

6

7

IC3 B

TL064

5

6

47K

R185

IC25A

13

2
9

1

1110

IC25D

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2

R183

17K4 1%

R184

24K9 1%

VR10

B1K

N:1 RATIO

COMPRESSOR/LIMITER

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TL064

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10M

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R204

3K9

R219

D20B

R212

R210

1K5 1%

D4A

DA204K-2/ 1

13

10K

2

PEAK LIMITER

THRESHOLD

47K

R202

-15V

+15V

OUTPUT GAIN

COMPRESSOR/LIMITER

R147

2K2

R237

C32

4.7UF/100V

T14

BR

4K7

R218

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DA202K-2/ 1

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R215

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2K2

R216

IC27B

TL064

5

6

-15V

1M

R217

6K8

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R228

1

C30

0.22UF

10K

R235

R234

1K

SW 12B

PS-22E85L

4

INTERACTIVE

R233

43K

R232

R230

240K

2

VR13

B10K

THRESHOLD

47K

D4B

DA204K-2/1

R209

R208

14

IC2 7D

TL0 64

12

R206

560K

1

R205

VR12

A20K

D18B

DA204K-2/ 1

1K

R203

2

D18A

DA204K-2/ 1

47K

R213

8

47K

9

10

47K

IC44-7

COMPRESSOR/LIMITER

IC2 7C

TL0 64

47K

R224

R223

470R

IC31D

TL064

CH3-LEVEL

-15V

1UF

C28

1

IC2 6A

TL064

SC FILITER

3

SW10C-9

13

R221

17K4 1%

0R

R220

C33

0.33UF

B10K

3

3K9

R239

R238

2

D29

1

2

R240

33R

680R

1

IC30A

TL0 64

3

1

BAS16

IC29D

12

13

R236

IC26-9

3

D27B

DA202K-2/ 1

P

5

6

COMPRESSOR/LIMITER

2K

8

9

10

R231

R229

3

D32

IC29C

TL0 64

3K

6K2

-15V

10M

R227

7

IC2 9B

5

6

8

IC31C

TL064

1413

9

10

47K

IC2 8A

13

1110

CA3086

2
9

14

IC28D

CA3086

12

R222

24K9 1%

-15V

10

TL0 64

2

1K

VR14

N:1 RATIO

BAS16

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12

4

6

11

B1K

IC26-10

R225

IC28C

SW 11D

COUPLE

CH3-MASTER

P

12

CH4- REDUCTION

CH3- REDUCTION

1

C34

22UF/35V

-15V

10M

5 3

IC2 8B

8 7

CA3086

PS-42E85L

IC26-12

98

R259

6

IC17A

4066

IC26-8 IC26-9

+15V

+15V

LIMITER

THRESHOLD

D25A

DA204K-2/ 1

20K

R251

C37

R226

2M7

-15V

47UF/25V

CA3086

+15V

+15V

C48

100N

C47

100N

411

CH4

IC30E

TL0 64

411

IC29E

TL0 64

3K

CH3-MASTER

2

3

LD79

RD

3K9

R258

LD68

RD

D26B

DA202K-2/ 1

C39

4.7UF/100V

2K2

R255

D25B

DA204K-2/ 1

7

4M7

R254

6

47K

R252

R250

1K5 1%

D3A

DA204K-2/ 1

14

IC30D

TL0 64

R247

523K 1%

12

13

R246

R244

10K

2

3

VR16

A20K

THRESHOLD

PEAK LIMITER

D24B

R242

47K

D23

BAS16

47K

R241

D24A

-15V

32 of

VER040820

EASON YANG

RevisionModel No:

Drawn By:

Sheet

ACL4

16-Sep-2004

A3

Size

DA202K-2/ 1

-15V

TL0 64

COUPLE

CH3-MASTER

IC26-9

SW 11B

ACL4 CH3+CH4.Sch

File:

Date:

PS-42E85L

SW 11A

PS-42E85L

COUPLE

C40

4K7

R261

+15V

R256

5

D3B

DA204K-2/1

4

COMPRESSOR : FRONT PANEL ( CH3+CH4 )

Titel

4.7UF/100V

T 6

BR

D26A

DA202K-2/ 1

D27A

BR

T15

1M

R257

2K2

C38

0.22UF

IC30B

TL064

47K

R253

8

47K

R249

R248

IC3 0C

9

10

47K

IC44-7

5

6

P

560K

R245

470R

1

CH4-LEVEL

1UF

C36

1K

DA204K-2/ 1

R243

-15V

1

IC2 9A

TL064

3

2

DA204K-2/ 1

CH3-MASTER

SW 11C

COUPLE

R147

7

8

9

PS-42E85L

P

B

1

2

3

SW 13A

SW PS-22E85L

I/O METER

SW 14A

BYPASS

1

2

3

SW PS-22E85L

A

1 2 3 4 5 6 78

1

2

3

SW 9A

SW PS-22E85L

I/O METER

SW 10A

BYPASS

1

2

3

CN2

SW PS-22E85L

12P-2.0

+15V

123456789

CH3

D

C

-15V

101112

CH4

D

C

B

A

P

I/O METERI/O METERI/O METERI/O METER

SW 13B

T8

8

R88

+15V

HR

1K 1/4W

PS-22E85L

4

5

LD81

R90

R89

15K

CH4CH4

LEVEL ( dB )

INPUT/OUTPUT

R76

1.2K 1/4W

+15V

7654321

39K

INTERACTIVEINTERACTIVEINTERACTIVEINTERACTIVE

SW 12A

T7

SW PS-22E85L

HR

1

2

LD80

R77

15K

R78

39K

GAIN REDUCTION (dB)

T6

R63

1K 1/4W

+15V

SW 9B

HR

PS-22E85L

4

5

LD77

R65

R64

15K

39K

SW 14B

6

PS-22E85L

4

GN

3

GN

P

SW 10B

6

PS-22E85L

4

GN

P

LD60

GN

LD61

GN

LD62

GN

LD63

GN

LD64

GN

LD65

YE

LD66

YE

LD67

5

6

2

IC15A

LD82

5

LD78

LM339

GN

5

R91

110R

13

IC14D

LM339

11

R79

1K

P

6

2

IC11A

LM339

GN

5

1

IC15B

LM339

7

4

R92

100R

LD59

RD

14

IC14C

LM339

9

10

R80

2K

LD43

GN

1

IC11B

LM339

7

4

14

IC15C

LM339

9

6

R93

200R

LD58

RD

1

IC14B

LM339

8

7

R81

3K

LD44

GN

14

IC11C

LM339

9

6

13

IC15D

LM339

8

11

R94

402R 1%

LD57

RD

2

IC14A

LM339

5

6

R82

4K02 1%

LD45

GN

13

IC11D

LM339

8

11

2

IC16A

LM339

5

10

R95

806R1%

LD56

RD

13

IC13D

LM339

4

11

R83

4K99 1%

LD46

GN

2

IC12A

LM339

5

10

1

IC16B

LM339

7

4

R96

1K58 1%

LD55

RD

14

IC13C

LM339

9

10

R84

4K99 1%

LD47

GN

1

IC12B

LM339

7

4

14

IC16C

LM339

8

9

6

R97

3K24 1%

LD53

LD54

RD

IC13B

8

R85

4K99 1%

LD48

YE

IC12C

6

RD

1

LM339

6

7

R86

4K99 1%

LD49

YE

14

LM339

8

9

RD

13

IC16D

LM339

10

11

R98

6K34 1%

2

IC13A

LM339

5

4

13

IC12D

LM339

10

11

R87

LD52

LD50

R99

RD

86K6 1%

RD

CH4-LEVEL

+15V

8K06 1%

-15v

CH3- LEVELCH2- LEVELCH1-LEVEL

+15V

C7

100N

312

IC16E

LM339

312

IC15E

LM339

312

IC14E

LM339

CH4- REDUCTION

312

IC13E

LM339

+15V

C5

100N

312

IC12E

LM339

-15V

C8

R100

22R 1/4W

47UF/25V

33 of

VER040820

EASON YANG

RevisionModel No:

Drawn By:

Sheet

ACL4

16-Sep-2004

ACL4 FP-LED.Sch

COMPRESSOR : FRONT PANEL ( DISPLAY )

A3

Titel

Size

File:

Date:

-15V

+15V

C6

R75

22R 1/4W

47UF/25V

100R

R101

147

-15V

1K

R102

+15V

+15V

+15V

+15V

CH3

CH3

CH2

CH2

LEVEL ( dB )

INPUT/OUTPUT

R51

GAIN REDUCTION (dB)

R38

LEVEL ( dB )

INPUT/OUTPUT

R26

GAIN REDUCTION (dB)

R13

+15V

R66

110R

R67

100R

R68

200R

R69

402R 1%

R70

806R1%

R71

1K58 1%

R72

3K24 1%

R73

6K34 1%

R74

SW 8A

T5

1.2K 1/4W

R52

15K

SW PS-22E85L

HR

1

2

3

LD76

GN

R53

39K

R54

P

SW 7B

SW 6B

T4

HR

1K 1/4W

R39

15K

T3

HR

1.2K 1/4W

R27

15K

PS-22E85L

4

5

6

LD74

GN

R40

39K

SW 5A

SW PS-22E85L

1

2

3

LD73

GN

R28

39K

PS-22E85L

4

P

5

6

LD75

GN

R29

P

SW 2B

T2

HR

1K 1/4W

R14

15K

PS-22E85L

4

R15

39K

BYPASS BYPASS BYPASS BYPASS

SW 3B

5

6

LD70

GN

PS-22E85L

4

P

5

6

LD71

GN

LD42

13

IC10D

LM339

10

11

1K

R55

LD26

2

IC7A

LM339

5

4

R41

110R

LD25

13

IC6D

LM339

10

11

1K

R30

LD9

2

IC3A

LM339

5

4

LD41

RD

14

IC10C

LM339

8

9

2K

R56

GN

LD27

1

IC7B

LM339

6

7

R42

100R

LD24

RD

14

IC6C

LM339

8

9

2K

R31

GN

LD10

1

IC3B

LM339

6

7

LD40

RD

1

IC10B

LM339

6

7

3K

R57

GN

LD28

14

IC7C

LM339

8

9

R43

200R

LD23

RD

1

IC6B

LM339

6

7

3K

R32

GN

LD11

14

IC3C

LM339

8

9

LD39

RD

2

IC10A

LM339

5

4

4K02 1%

R58

GN

LD29

13

IC7D

LM339

10

11

R44

402R 1%

LD22

RD

2

IC6A

LM339

5

4

4K02 1%

R33

GN

LD12

13

IC3 D

LM339

10

11

LD38

RD

13

IC9D

LM339

10

11

4K99 1%

R59

GN

LD30

2

IC8A

LM339

5

4

R45

806R1%

LD21

RD

13

IC5D

LM339

10

11

4K99 1%

R34

GN

LD13

2

IC4A

LM339

5

4

LD37

RD

14

IC9C

LM339

8

9

4K99 1%

R60

GN

LD31

1

IC8B

LM339

6

7

R46

1K58 1%

LD20

RD

14

IC5C

LM339

8

9

4K99 1%

R35

GN

LD14

1

IC4B

LM339

6

7

LD36

RD

IC9B

4K99 1%

YE

IC8C

R47

RD

IC5B

4K99 1%

YE

IC4C

RD

1

LM339

IC9A

LM339

5

6

7

R61

4K99 1%

LD32

YE

14

LM339

IC8D

LM339

8

9

3K24 1%

LM339

7

LM339

9

11

R48

6K34 1%

LD19

RD

1

IC5A

LM339

5

6

R36

4K99 1%

LD15

YE

14

IC4 D

LM339

8

11

8K06 1%

LD35

RD

2

4

R62

86K6 1%

LD33

RD

13

10

R49

8K06 1%

LD18

RD

2

4

R37

86K6 1%

LD16

RD

13

10

CH3- REDUCTIONCH2-REDUCTI ONCH1- REDUCTION

-15v

+15V

-15v

312

IC11E

LM339

312

IC10E

LM339

312

IC9E

LM339

+15V

C3

100N

312

IC8 E

LM339

312

IC7E

LM339

312

IC6E

LM339

312

IC5E

LM339

+15V

C1

100N

312

IC4E

LM339

C4

47UF/25V

C2

47UF/25V

IC1 7E

4066

-15V

R50

22R 1/4W

-15V

R25

22R 1/4W

CH1

INPUT/OUTPUT

LEVEL ( dB )

SW 1A

T1

R1

1.2K 1/4W

+15V

R2

15K

CH1

GAIN

SW PS-22E85L

HR

1

2

3

LD69

GN

R3

39K

REDUCTION (dB)

D

R16

110R

R17

100R

R18

200R

R19

402R 1%

R20

806R1%

R21

1K58 1%

R22

3K24 1%

R23

6K34 1%

R24

LD1

LD2

LD3

LD4

LD5

LD6

LD7

LD8

RD

13

IC2 D

R4

1K

IC2C

LM339

10

11

R5

2K

RD

14

LM339

8

9

R6

3K

C

RD

1

IC2B

LM339

6

7

R7

4K02 1%

RD

2

IC2A

LM339

IC1 D

5

4

R8

4K99 1%

RD

13

LM339

10

11

R9

4K99 1%

RD

14

IC1C

IC1B

LM339

8

9

R10

4K99 1%

RD

1

LM339

6

7

R11

4K99 1%

B

RD

2

IC1A

LM339

5

4

R12

86K6 1%

+15V

8K06 1%

-15v

312

IC3E

LM339

312

IC2E

LM339

312

IC1E

LM339

1 2 3 4 5 6 78

CH1 CH2 CH3 CH4

A

D

C

B

A

V1 0

21 of

8

OUTPUT 1

CH1

7654321

X4

JY-5030-030G

213

4

X3

JY-6351G-02-250

3c5e1a4d2b

+15V

C57

100N

C55

100N

411

IC5E

TL074

411

IC4E

MC33079

C11

IC3 E

TL074

470P

411

-15V

+15V

C58

100N

C56

100N

C61

C59

411

IC7E

MC33079

100N

100N

-15V

C62

100N

C60

100N

OUTPUT 2

CH2

X7

IC6E

TL074

411

X8

JY-5030-030G

213

4

JY-6351G-02-250

3c5e1a4d2b

COMPRESSOR : REAR P ANEL ( CH1+CH2 )

SGNDSGNDSGND

C22

470P

Titel

EASON YANG

RevisionMode l No:

Dra wn By :

Sheet

CLE40

CH1+CH2 SCH

A3

Size

File:

Date: 2 4 -May-2002

C10

470P

SGND SGND SGND

R50

R51

R21

60R4

R20

5K76

0P

C8

R18

9

10K

10P

C7

R23

3K24

R22

4K53

8

IC4C

MC33079

10

R19

3K16

28K

R17

1

IC3A

TL074

2

20K

R16

R27

R28

60R4

4K53

C9

3

14

10P

IC4D

MC33079

12

13

R26

6K04

R24

10K

IC3 C

47P

C6

TL074

9

R15

12K1

R29

3K16

0P

C19

R25

2K67

8

50K

VR1

1

+15V

10

3

-15V

2

R14

300K 5%

R47

60R4

R49

5K76

6

10K

C18

10P

R52

3K24

4K53

7

IC4B

MC33079

5

R48

3K16

28K

R46

8

IC5C

TL074

9

R45

20K

R56

R57

60R4

C20

1

10P

IC4A

3

2

R55

6K04

R53

10K

10

R44

12K1

IC5D

C17

47P

C21

470P

R58

3K16

4K53

CH3+ CH4

MC33079

R54

2K67

14

TL074

+15V

12

13

CH3+ CH4 SCH

VR2

50K

1

3

-15V

2

R43

300K 5%

OUT

IC8

THAT2150

SW1-10

+15V

SYM

EC-

EC+

73

GND

V+

V-

-IN

18

R11

R10

R9

57K6

-10dBV ~ +4dBu

OPERATING LEVEL

SW 1

R8

57K6

PS-42E85

C2

10P

R7

20K

R2

13K3

R1

13K3

213

4

X1

未標示誤差值者皆為 1% 電阻

JY5042-030G

12K1

C5

47UF/25V

14

IC3D

TL0 7 4

12

13

C1

47P

SGND SGND

R4

R3

X2

624
5

4K7 5%

R5

13K3

13K3

JY-6351G-02-250

20K

3c5e1a4d2b

-15V

R12

47R

R13

33R 5%

SW 2

PS-42E85

R38

SW1- 10

R6

57K6

C4

10P

+15V

C3

47P

123456789

CN3

12P-2. 0

SGND SGND

101112

OPERATING LEVEL

-15V

57K6

-10dBV ~ +4dBu

R37

57K6

R36

20K

X18-12

IC9

THAT2150

SW2-10

+15V

C13

10P

R31

13K3

R30

13K3

213

4

X5

JY5042-030G

OUT

SYM

EC-

EC+

624

73

V+

R39

C16

C12

47P

47UF/25V

6

5

GND

V-

-IN

18

R40

4K7 5%

12K1

7

5

SGND SGND

-15V

IC3B

TL074

R34

20K

R33

13K3

R32

13K3

3c5e1a4d2b

X6

JY-6351G-02-250

R41

47R

R42

1K 5%

X18-12

SW2-10

R35

57K6

C15

10P

SGNDSGND

C14

47P

INPUT 1

CH1

D

C

B

INPUT 2

CH2

A

1 2 3 4 5 6 78

D

C

B

A

V1 0

22 of

1

8

2

CN2

2P-2.5

EASON YANG

RevisionModel No:

TT4

R117

1K 1/4W

C53

100N

+15V

TT3

C51

10UF/50V

OUT

C54

100N

-15V

TT5

JP1

JUM PER -3

C52

OUT

1 2

10UF/50V

SGND

Drawn By:

S h eet

G

G

OUT

IC1

7815

OUTPUT 3

7654321

R79

60R4

R78

5K76

10P

C30

R76

9

10K

CH 3

X12

JY-5030-030G

213

4

R80

4K53

8

IC7 C

MC33079

10

R77

3K16

28K

R75

X11

JY-6351G-02-250

3c5e1a4d2b

SGNDSGNDSGND

C33

470P

C32

470P

R85

R86

60R4

R81

3K24

10P

C31

R84

6K04

14

4K53

14

IC7 D

MC33079

12

13

R82

10K

R87

3K16

R83

2K67

IN

IN

C49

1000UF/35V

BD1

+21V

C46

100N

C45

RB154

100N

123

CN1

3P-3. 96

G

G

OUT

IC2

7915

IN

IN

C50

1000UF/35V

-21V

X16

C48

C47

10P

C41

R105

JY-5030-030G

100N

4

100N

R108

60R4

R107

5K76

1

3

2

10K

OUTPUT 4

CH 4

X15

JY-6351G-02-250

213

R109

R110

4K53

IC7 A

MC33079

R106

3K16

28K

R104

3c5e1a4d2b

SGNDSGNDSGND

C44

470P

C43

470P

R114

3K24

60R4

C42

10P

7

6

R113

6K04

R111

8

10K

R116

R115

4K53

3K16

IC7 B

MC33079

5

R112

2K67

CLE4 0

24-May-2002

CH3+CH4 Sch

COMPRESSOR : REAR PANEL ( CH3+CH4 )

A3

Titel

Size

File:

Date:

IC6D

10P

C29

R67

57K6

-10dBV ~ +4dBu

OPERATING LEVEL

SW 3

TL074

C40

12

13

20K

R74

1

IC5A

C28

2

R73

12K1

IC10

THAT2150

EC-

73

+15V

V+

-IN

18

R68

12K1

C27

47UF/25V

7

SW3-10

R66

57K6

PS-42E85

C24

10P

SYM

OUT

EC+

IC5B

3

GND

V-

R69

+15V

624
5

4K7 5%

TL074

R63

20K

47P

TL074

50K

VR3

1

R71

-15V

SW3-10

R64

57K6

3

-15V

2

R72

300K 5%

47R

R70

33R 5%

R96

-10dBV ~ +4dBu

OPERATING LEVEL

IC6 C

TL074

10P

9

10

R103

20K

R102

12K1

1

VR4

IC6A

C39

47P

IC1 1

SW 4

PS-42E85

SW4-10

+15V

57K6

R95

57K6

C35

10P

TL074

3

2

OUT

THAT2150

SYM

EC-

EC+

624

73

V+

R97

C38

47UF/25V

5

GND

V-

-IN

18

R98

4K7 5%

12K1

7

IC6B

TL074

R92

50K

1

+15V

R100

-15V

R93

57K6

20K

3

-15V

2

R101

300K 5%

47R

R99

1K 5%

X19-12

SW4-10

R65

20K

R60

13K3

R59

13K3

213

4

X9

未標示誤差值者皆為 1% 電阻

D

JY5042-030G

5

6

C26

13K3

13K3

C25

3c5e1a4d2b

10P

+15V

47P

123456789

CN4

12P-2.0

SGND SGND

-15V

101112

X19-12

R62

C23

47P

R61

SGND SGND

X10

JY-6351G -02-250

INPUT 3

CH 3

C

R94

20K

R89

13K3

R88

13K3

213

4

X13

JY5042-030G

5

6

C37

10P

R91

13K3

SGNDSGND

C34

47P

R90

13K3

3c5e1a4d2b

C36

47P

SGND SGND

X14

JY-6351G -02-250

1 2 3 4 5 6 78

INPUT 4

CH 4

B

A