Alto VOICE PLUS D Service Manual

MODEL: VOICE PLUS D

www.altoproaudio.com

Version 1.0

CONTENT

1. Introduction…………………………………………………………………….1

2. Specification…………………………………………………………………...2

3. Block Diagram…………………………………………………………………3

4. Schematic Diagram…………………………………………………………...4

5. Wiring Diagram……………………………………………………………….10

6. Printed Circuit Board……………………………………………………...11

7. Exploded View & Mechanical Parts List…………………………………...18

8. Electrical Parts List…………………………............................………...21

1. Introduction

˙ +48V phantom and LOW-CUT/PHASE function
˙ VINTAGE function
˙ -40~+20dB THRESHOLD/N: 1~1:1 RATIO/LIMTER
˙ VOICE OPTIMIZED EQ
˙ DE-ESSER function can eliminate the noise.
˙ SPDIF digital-output has 44.1k/48k/88.2k/96k/176.4k/192kHz sampling

ratio, as well as external frequency input.

- 1 -

2.Technical Specification

Frequency Response Line In To Main Out 10kHz-50 kHz : +0/-2dB

Distortion MIC->INS Send <0.01%/-30dBu/30dB Gain

Line->INS Send <0.01%/0dB/Unity

Noise Main Out BAL -88dBu

Recording Out -100dBu

>100dBuSNR

Input Level (Max.) MIC In +11.7dBu

Line In +22.7dBu

Output Level (Max.) Main Out BAL +22dBu

Main Out UNBAL +22dBu

Recording +22dBu

Insert Send +22dBu

Digital Sampling Rates 44.1k, 48k, 88.2k, 96k, 132.3k, 144k

Output 24-bit

Power Supply Mains Voltage U.S ./ Canada 120V , 60Hz

U.K ./ Australia 240V , 50Hz

Europe 230V , 50Hz

General Export Model 95-120V , 200-245V, 50-60Hz

Power Connector 20W MAX

Fuse 100-120V: 500mA

200-240V: 315mA

Physical Dimensions 1 3/4" (44.5mm) 19" (482.6mm) 8

1/2" (217mm)

Net weight Approx.3.3kg

Shipping Weight Approx.4.1kg

- 2 -

3.Block Diagram

D

MIC PRE-AMP

LINE PRE-AMP

C

321

4

BLOCK DIAGRAM

RETUNE

SEND

LOW-CUT PHASE VINTAGE

3c

4d

2b

1a

5e

D

INSERT

C

COMPRESSOR VOICE-EQ DE-ESSER GAIN

B

OUT

B

S/PDIF-OUT

DIGITAL-OUT

A

1 2 34

WCLK-IN

- 3 -

A

87654321

4.Schematic Diagram

- 4 -

1

C15

4580
R58
14K0

4580

14K0

INPUT_GAIN

1

VR1A

2

C10K

R60
1K58

3

C83

47uF/25V

COMPRESSOR_IN

312

U32E
LM339

4
5
6

1

7

R9
10K0

R10
10K0

PASS_LED

SW2B

PHANTOM

3

2

R83

+15V

2
3

INPUT_LEVEL

C21
104pF

C22
104pF

R78

47K5

30K

TR2
HR

R79

1K5 1/4W

U32D
11

10

LM339

R80

100R00

+15V

C131

22pF

R34

47K5

U2A

1

4580

C23

C25

104pF

104pF

C24

C26

104pF

104pF

R81
1K5 1/4W

R82
30K

C88

47uF/25V

C27
104pF

C28
104pF

13

TR3
HR

SW4A

LOW_CUT

LED2

GR

U32C
9

8

LM339

R84

301R00

SW4B

R85
47K5

LOW_CUT

R52

1

470K

2

R53

3

470K

MIC_IN­MIC_IN+

LINE_IN­LINE_IN+
48V-SEND
INSERT_SEND
48V-RET
INSERT_RET

COMPRESSOR

VOICED-FP_COMPRESSOR.SCH

Titel

Size

Date:
File:

LED3

GR

14

R88

1K15

LED13

4

YEL

5

6

P

C99
22n

U32B
7

6

LM339

R89
20K0

SW3B

P

INV

C100
22n

+48V

LED4

GR

1

R91

1K58

LED5

4

GR

5

6

1

VR2A

LOW_CUT FRE

C500K

2

U4A

2

3

3

R90

4580

20K0

4

VR2B
C500K

5

6

J1

1
2
3
4
5
6
7
8
9
10

CON10

EQ

VOICED-FP_EQ.SCH

ALTO VOIVE Plus D-FP BOARD INPUT： （ ）

A4

VOICE Pluse D

3-January-2005

U32A
5

4

LM339

SW1D

P

LINE

1

LOW_CUT FRE

+15V-15V

J2

1
2
3
4
5
6
7
8
9

10

CON10

Sheet
Drawn By:

LED1

RED

2

R94

+15V

3K60

LED6

10
11

12

SW_LED1

GR

C89

47uF/25V

MAIN_OUT

EQ_OUT

OUTPUT

VOICED-FP_OUTPUT.SCH

RevisionModel No:

VER041112

1 of 4

Rscartt

-15V
D

C

B

A

+15V

R64

2K00

LED18
RED

P

U2B

5
6

R12

C10

10K0

47pF

4580

R13

C11
47pF

U1A

4580
R11

C84
20pF

C86

1

47uF/25V

4K99

R92

4K75

C87

7

R68

47uF/25V

20K0

10K0

SW1C

7

C137

8

9

47u/25V

P

SW3A

LINE

INV

R49
20K0

D1

R137

1N4148
D2

47K5

6
5

47K5R136

1N4148D31N4148

U31B
4580

7

R134
22R

U31C
4580

4 8

4 8

U1C

U4C

4580

4580

4 8

4 8

INPUT_LEVEL

R48

47K5

3
2
1

R140

1K00

C108
1uF/16V

+15V

U2C

U3C

4580

4580

4 8

-15V

R55
220K

R33

U31A

47K5

2

D

R242
0R

SW2A

PHANTOM

1
2

48V-RET

3

48V-SEND

+48V

C133
100pF

R31

R32

R29

C3

10R0

47uF/63V

6K81

C5
330pF

6K81

C

MIC_IN+
MIC_IN-

LINE_IN+
LINE_IN-

SW1A

1
2
3

LINE
SW1B

4

B

INSERT_RET

A

INSERT_SEND

1 2 3 4 5 6 7 8

5
6

P

LINE

R125
2K67

R115
100R

R126
12K7

R127
47K5

C134
100pF

R30
10R0

C135
N/C

R2
R3

C136
N/C

5

6

R129
15K0

C4

47uF/63V

10K0
10K0

R4
10K0

U4B

7

4580
R133

3K24

C12
47pF

C14

104pF

C6
47pF

C94

47uF/25V

3

4580

R47

470K

104pF

R46
470K

U3A

3

R5
100K

R6
100K

5
6

2

4

C8

5

47pF

VR1B

C81

C10k

470pF

INPUT_GAIN

6

R54
22R0

C82
1000uF/16V

U3B

5

6

R59

C9
47pF

U1B

R8

7

R128
47K5

10K0

C17
104pF

C18
104pF

C19
104pF

C20
104pF

4K99

4580
R7

C7
47pF

87654321

-5-

R234

R233

47K5

30K

TR5

+15V

HR

6
5

D8

1N4148

D9

1N4148

R172
39K0
U13B

4580

D10

1N4148

D11

1N4148

R235

1K5 1/4W

D12

1

1N4148

D13

7

1N4148

R232

2K21

7

U34D
11

10

LM339

C96

47uF/25V R41

2

5

U34B

6
7

LM339

C127

1N5

C128

1N5

3

4

11

R237

200KR238

1

R170
39K0

R171
51K1

R191
18K0
U36

VCR-VTL5C4

R63
4K75

12

VR7D
B20K

10

D26

1N4148

R243
100K

+15V

R44
60K4

R45
60K4

R236

1K00

C129
1uF/16V

+15V

R221
220R

1

2

R222
130K

U11A

2

3

4580

R223
130K

U11B

6
5

4580

D

100K

1N4148

D25

SW_LED3

C

SW9C

P

BYPASS

LED11

7

GR

8
9

-15V

SW9D

P

BYPASS

10
11
12

R131

R189

15K00

5K11

R190
5K11

U12A

2
3

1

4580

R174

4K99

8

7

VR7C

B20K

C125
1N

VR7A
B20K

6

VR7B
B20K

5

U12B

6

1

R216
6K20

5

4580
R25
10K0

2

B

C124

R215

EQ_OUT

3n3

3

4K02

C126

R218

9

2K00

1n5

R217

4

4K12

7

1

3

4

6

VR8A

B10K

R219
150R00

VR8B

B10K

R220
150R00

LED35

GR

13

R231

2K49

SW9A

1

2

47K5

3

BYPASS

SW9B

4
5
6

P

BYPASS

6

5

R57

C98

1K00

1uF/50V

U34C
9

8

LM339

LED12

GR

+15V

U10B

4580

R241
301K

LED36

GR

11

14

10

R230

5K11

3

R192

1

15K0

R224
1M50

R132

7

15K0

U33D

LM339

VR9
B50K

C97

47uF/25V

2

2
3

13

R194
5K11

U10A

4580

LED37

GR

3

4

R229

9K10

2
3

U35

U33C
9

8

LM339

C85
20pF

R195
17K4
U13A

4580

1

LED38

GR

14

R228

10K0

1

1

2

U33B
7

6

LM339

MAIN_OUT

LED39

GR

1

R227

7K50

U33A
5

4

LM339

J3

CON2

LED40

-15V

C130

RED

104P

2

R226

+15V

33K2

+15V

R75
1K2 1/4W

2
1

D

C

B

VCR-VTL5C4

D15

TR4

R26
10K00

1N4148

BR

R225
10R0

D14
1N4148

R77
4K70

A

1 2 3 4 5 6 7 8

312

U33E
LM339

R240

312

U34E
LM339

22R 1/4W

U10C

U11C

4580

4 8

4 8

U12C

4580

4580

4 8

+15V

C73

C75

C77

104pF

-15V

C74
104pF

104pF
C76

104pF

U13C
4580

4 8

104pF
C78

104pF

C79
104pF

C80
104pF

Titel

ALTO VOIVE Plus D-FP BOARD OUPUT： （ ）

Size

Date:
File:

A4

VOICE Pluse D

3-January-2005

Sheet
Drawn By:

RevisionModel No:

4 of 4

Rscartt

VER041112

A

87654321

-6-

SW_LED2 SW_LED3

D

R15

R114
100R

10K0
U5B

5
6

4580

1

2
3

SW5A

BYPASS

7

SW5B

P

BYPASS

R117
2K20

R120
100K

4

5

EQ_OUT

6

R14
10K0

C105
6n8

C103
3n3

R110
1K00

C132

47pF

R96

C

COMPRESSOR_OUT

5K11
U9B

R95

6

5K11

5

4580

7

C90

47uF/25V

R35
47K5

C91

47uF/25V

R98
5K11

1

VR3
B10K

2

4

3

R99

4K75

U5A

2

3

4580

SW6B

P

ABSENCE

1

LED7

4

GR

5
6

C101

R101
5K11

22n

SW5C

P

BYPASS
SW5D

P

BYPASS

LED8

7

GR

8
9

10

11
12

R107

R103

5K11

C102
22n

U6A

2
3

4580
R123
10K0

R102
5K11

R62

1

3K60

C93

47uF/25V

2

VR4
B10K

1

3

R106
U6B

6

4

5

4580

5K11
R124

1K80

5K11

R108

7

5K11

D

C

VR5B
A20K

6

C106

R72

1

4K70

47n

B

R97
5K11
U7A

2
3

R119

1

2K20

VR5A
A20K

4580

U9A

2
3

4580

C110
1n8

R121

A

100K

C111

R111

1

1K00

10n

SW6A

1
2
3

ABSENCE

1 2 3 4 5 6 7 8

R73

4

4K99

5
2

R86

C107
47n

U8A

2

3

3

4580
R16
10K0

R100
5K11

R65
2K00

R142

6

2K70

5

C92

R61

1

3K32

47uF/25V

R109
5K11
U7B

7

4580

C95

47uF/25V

VR6
B10K

R36
47K5

1M00

R104

5K11

U8B

6

5

R105

7

5K11

4580

B

+15V

C31

C33

C35

C37

104pF

104pF

U5C

U6C

U7C

U8C

4580

4580

4580

4 8

4 8

4 8

4 8

U9C

4580

4580

C32

4 8

Titel

Size

Date:
File:

104pF

-15V

ALTO VOIVE Plus D-FP BOARD EQ： （ ）

A4

3-January-2005

C34
104pF

VOICE Pluse D

104pF
C36

104pF

104pF
C38

104pF

Sheet
Drawn By:

C39
104pF

C40
104pF

RevisionModel No:

3 OF 4

Rscartt

A

VER041112

87654321

-7-

D

COMPRESSOR_IN

C

B

A

VINTAGE

CONTROL

C118

47uF/25V

1

R244
49K9

R245
10K0

C140
33nF

1 2 3 4 5 6 7 8

R122
10K0
U14A

R24

2

C138

10K0

2

VR13

C139

C500K

472pF

1

3

3

4580

D28
1n60

D29
1n60

D30
1n60

D31
1n60

D32
1n60

D33
1n60

R161
10K0

R202
10K0

R164
10K0

R201
10K0

R206
10K0

R70

47uF

22K0

COMPRESSOR/LIMITER

+15V

OUTPUT GAIN

1

VR10

2

B50K

3

-15V

R143

200R

SW8B

P

BYPASS

2

3

R150
R148
120K

R196
24K9

9

10

1K00

6

7

5

U20B
4580

D16

1N4148

R144

200R

4
5

R149

6

10R0

C121

0.33uF/50V

R167
17K4

1110

1

U24A
TL064

U25D
CA3086

6

U25C
CA3086

8

U24C
TL064

SW_LED1

U26B
4580

5

6

R38
39K2

R37

R112

1K00

2M21

-15V

COMPRESSOR_OUT

R42

47K5

13

6

5

U25A

2

9

CA3086

1413

4

12

5 3

8 7

U25B
CA3086

13

14

12

U24D
TL064

LED9

SW7B

4

5

GR

6

P

SMART

47uF/25V

+15V

C113

U25E

7 3

V+

1 8

-IN
GND

V-

R74
4K70

-15V

R43
47K5

7

R199
2M70

LED10

GR

U15
THAT2150

EC-

SYM

OUT

EC+

5

6 2 4

R154
47R

COMP-REDUCTION

COMPRESSOR/LIMITER

PEAK LIMITER

C122
N/C

R19

N/C

U23B

6
5

4580

-15V

SW_LED2

+15V

C123
22uF/50V

R155

301K

3

VR15

2

A20K

1

R18
475R

R198
10M0

R20
0R0

R151

12K1

7

U24B
TL064

CA3086

R197

-15v

10M0

SW8A

1

2

3

P

BYPASS

+15V

VR14
50K

-15V

R168
10K0

R153

2

523K

3

COMPRESSOR/LIMITER

THRESHOLD

-15V

R163
1K15

3

R200

7

3K00

C13
22pF

R158

12K1

U14B

6
5

R146
523K

U19A

4580

VR11

B10K

R156

2

330K

R157
N/C

-15V

C114

R93

7

4K75

47uF/25V

4580

R162
10R0

D20

1N4148

R208

1

47K0
U19B

R166

6

47K0

5

4580

SW7A

+15V

R160
1K20

1

1

2
3

SMART

C104

100pF

R17

43K0

2

D17

1

3

U23A

1N4148

4580

COMPRESSOR/LIMITER

D4

R139

1N4148
D5

47K5

1N4148D61N4148

U26A

2

4580

3

C116

47uF/25V.

R69
20K0

D24

R159

7

47K0

1N4148

R207
47K0

R23
10K0

D27

R145

1

1N4148

2K00

R113

VR12

1K00

2

B1K

R152

1K00

3

R141

47K5R138

1

D7

1N4148

R56

4M70
U20A

2

3

4580

R165

2K20

C115

N/C

2

3

U18A
4580

COMP-LEVEL

1K00

C109
1uF/16V

CH1

R186

51R10

R116
60R4

R147

121R

R185

200R

R184

475R

R210

806R

R211
2K00

R212

4K22

R213
8K06

COMP-LEVEL

OUTPUT LEVEL(dB)

R181

1K8 1/4W

TR9
HR

U29D

11

LM339

10

U29C

9

LM339

8

U29B

7

LM339

6

U29A
LM339

5

4

U30D

11

LM339

10

U30C

9

LM339

8

U30B

7

LM339

6

U30A

5

LM339

4

+15V -15V

R187
30K0

R188
47K5

13

LED27
GN

14

LED28
GN

1

LED29
GN

2

LED30

GN

13

LED31
GN

14

LED32
YE

1

LED33
YE

2

LED34
RD

R214

22R 1/4W

CH1

GAIN REDUCTION(dB)

R66

COMP-REDUCTION

100R

R67
3K60

R173
5K76

R178
7K50

R175
9K10

R176
6K81

R179
12K1

R177
9K10

R209
60K4

+15V

LED14
YEL

R22
3K90

D22

1N4148

+15V

1

D18

R169

1N4148

2K20

R130

R118

2K20

1M00

C119

0.22uF/50V

-15V

U18B

R40

6

7

5

4580

1

D19
1N4148

R205
4K70

TR7

D21

BR

1N4148
D23

1N4148

C117

4.7uF/50V

680R

R39
33R0

TR6

C120

BR

4.7uF/50V

+15V +15V

R180

1K8 1/4W

5
4

7

6

9

8

11

10

5

4

7
6

9

8

11
10

R183
15K0

TR8
HR

R182
39K0

U27A
LM339

2

LED26
RD

U27B

LM339

1

LED25
RD

U27C
LM339

14

LED24

RD

U27D
LM339

13

LED23

RD
U28A
LM339

2

LED22

RD
U28B
LM339

1

LED21

RD
U28C
LM339

14

LED20

RD
U28D

LM339

13

LED19

RD

-15V

RATIO n:1

HR : 2SA1036(PNP)
BR : 2SC2412(NPN)

+15V

U14C
4580

4 8

+15V

C49

C51

C53

104pF
C50

104pF

C55

104pF

104pF

104pF

C52

C54

C56

104pF

104pF

104pF

-15V

U19C

U18C

4580

4580

4 8

4 8

C57

C59

104pF

104pF

C58

C60

104pF

104pF

411

U20C
4580

4 8

R135
22R 1/4W

U24E
TL064

U23C
4580

4 8

-15V

312

312

312

312

C63

C65

C67

U26C
4580

4 8

U28E

U27E
LM339

U29E

LM339

LM339

Titel

ALTO VOIVE Plus D-FP BOARD COMPRESSOR： （ ）

Size

A4

Date:
File:

U30E
LM339

3-January-2005

104pF
C64

104pF

VOICE Pluse D

C69

104pF

104pF

104pF

C66

C68

C70

104pF

104pF

104pF

RevisionModel No:

Sheet

2 OF 4

Drawn By:

Rscartt

C71
104pF

C72
104pF

VER041112

D

C

B

A