Alto DI1 Schematic

Service Manual

Model: DI1

DIRECT INJECT BOX

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. Notes

1. SPECIFICATIONS (DI1)

Inputs 1/4” jack unbal. In/ Link Out

XLR unbalanced In

Input Impedance max 220 kOhm Maximum Input level +2/+22/+42 dBm

Output XLR balanced Out Load Impedance >600 Ohm Maximum Output Level +6 dBm

System specifications

Bandwidth(100kOhm) 10Hz to 200Khz(±3dbm) Bandwidth(600Ohm) 10Hz to 45Khz(±3dbm) Bandwidth(High Cut) 10Hz to 8Khz(±3dbm)

Noise Level -105 dBm THD+N @ 1 kHz / 1 dBm < 0.01 %

Power supply

Phantom power 18 V DC to 48 V DC Battery 9 V blockcell 6LR91

Dimensions 128 mm x 123.5 mm x 44.2 mm Weight ca. 0.8Kg

D

2.Block Diagram

C

B

A

V1.0

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Sheet

IC1

PHANTOM POWER

STEP-DOWN CONVERTER

LED1

LED CONTROL

SW4

PHASE

SW1

8KHz HIGH CUT

SW5

GND LIFT

DI1

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DI1 DIGRAM.Sch

DI1 BLOCK DIGRAM

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SW3

-20dB ATTENUATION

SW2

-20dB ATTENUATION

213

4

INPUT

D

CN2

XLMN-3PH

3c5e1a4d2b

C

INPUT

CN3

CN-JY6351G-02

3c5e1a4d2b

SW6

BATTERY +9V

LINK

BATTERY POWER

CN4

CN-JY6351G-02

B

1 2 3 4

A

D

3. Schematic Diagram

C

B

A

Titel

DI1FP

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Q1

BR

C8

470/16V

D7

D4

4148

D3

FM103

7

6

84

D2

CN2

47R

R17

47K

2

GND2

R13

1

R14

3

16K

100K

R19

IC1A

16K

2068

C3

100u/25v

R12

100K

R11

1M

C2

100u/25v

GND2 GND2

GND2

R18

4321

GR

LED1

D1

R4

4K7

4148

C5

100n

R5

24K

R15

47K

+VCC

47K

C4

100n

R16

120K

R3

5

IC1C

2068

FM103

DC +9V

IC1B

C7

100u/25v

D6

R20

2068

D5

4148

47R

R21

33R

C6

153 (M)

C10

470uF

ZD1

11V

SW3

R2

47R

R1

GND2

470K

R7

470K

SW1

PS-22E85L

(8KHZ HIGH CUT)

456

1

C9

100n

CN1

10 9 8 7 6 5 4 3 2 1

GND2 GND2 GND2

10P-2.0

PS-22E85L

R8

51K

SW2

( -20dB ) ( -20dB )

PS-22E85L

R6

51K

GND2 GND2 GND2

C1

0.47/50V

3

2

SW5

PS-22E85L

SW6

DC-POWER

( GND LIFT )

GND2

SW4

PS-22E85L

(PHASE)

GND2 GND2 GND2 GND2 GND2

1 2 3 4

D

C

B

A

D

C

B

A

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CN5

XLR-3MALE

OUTPUT

TR1

15V

D2

BR

100u/25v

820R

C6

R4

51K

TR2

BR

C4

R5

820R

1n

C7

4K7

R7

R6

100n

CN1

10 9 8 7 6 5 4 3 2 1

10P2.0

213

4

GND2

T1

L2

220H

2

OTS-1030

1

4

3

R9

213

5

4

22K(omit)

GND2 GND2 GND2

CN2

XLMN-3PH

3c5e1a4d2b

GND1

CN3

CN-JY6351G-02

D1

1

3c5e1a4d2b

SFS1B-T

IC1

R3

1R

R8

1R

C5

T2

C3

MC34063A/E

C2

100P

GND2 GND2

CN4

CN-JY6351G-02

470P

100uF

LINK

C8

GND2

104P

GND1 GND1 GND1

C1

470uF

GND1GND1

R10

27R

R2

3K32

R1

1K18

INPUT

D

INPUT

C

LINK

1 2 3 4

B

A

4.Printed Circuit Diagram

DI1FP PCB LAYOUT

PCB : DI1FP Top Layer

PCB : DI1FP Top Solder Mask

PCB : DI1FP Top Overlay

PCB : DI1FP Bottom Layer

PCB : DI1FP Bottom Solder Mask

PCB : DI1FP Bottom Overlay

PCB : DI1FP Drill Drawing Plots

Hole Size Hole Count 24mil (0.6mm) 46

31mil (0.8mm) 54 35mil (0.9mm) 10 39mil (1.0mm) 2 138mil (3.5mm) 4

Totals 116

DI1PU PCB LAYOUT

PCB : DI1PU Top Layer PCB : DI1PU Bottom Layer

PCB : DI1PU Top Solder Mask PCB : DI1PU Bottom Solder Mask

PCB : DI1PU Top Overlay PCB : DI1PU Bottom Overlay

PCB : DI1PU Drill Drawing Plots

Hole Size Hole Count 24mil (0.6mm) 28

31mil (0.8mm) 25 35mil (0.9mm) 10 39mil (1.0mm) 5 47mil (1.2mm) 4 63mil (1.6mm) 8 126mil (3.2mm) 2 150mil (3.8mm) 1 197mil (5.mm) 2

Totals 85

DI4IN PCB LAYOUT

PCB : DI4IN Top Layer PCB : DI4IN Top Solder Mask

PCB : DI4IN Top Overlay PCB : DI4IN Bottom Layer

PCB : DI4IN Bottom Solder Mask PCB : DI4IN Drill Drawing Plots

Hole Size Hole Count 24mil (0.6mm) 2

87mil (2.2mm) 10

Totals 12

D

5. Wiring Diagram

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C

B

A

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BATTERY +9V

PT-DI1

DI1PU

DI1 Wiring DIAGRAM

CN1

DI1FP

CN2

CN1

1 2 3 4

D

C

B

A

6. Test Procedure

Adjustments (Please follow the instructions to test.)

1. Setting 1 Settings:

1. AP: set same as left features。

Test:

1.LEVEL: Keep it at the range of +5dBm±1dBm

2.Distortion: 0.01%(+0.005%)。

2. Setting 2.

Setting:

1. Set AP OUTPUT in OFF mode.

Test :

1. Noise Level -105 Bm(±3dBm)

3. Test 3

Settings:

1. AP: Set as the left features.

2. RED Curve shows when all

functions are at “OFF” mode, and the setting for AP output impedance is 100K

3. CYAN Curve shows when all

functions are at “OFF” mode, and the setting for AP output impedance is 600Ω

4. GREEN curve means only HIGH

CUT(8KHZ) is ON, and AP output impedance is 600Ω

5. Testing curve should be same as

the curve in the pictures next page, ±2dBm

Audio Precision

06/28/02 17:55:59

+10

+0

-10

d

-20

B m

-30

-40

-50 20k 200k40k 60k 80k 100k 120k 140k 160k 180k

Hz

Color Line Style Thick Data Axis

Cyan Solid 2 Anlr.Level A Left Green Solid 2 Anlr.Level A Left Red Solid 2 Anlr.Level A Left

last.at2c

Other hints :

1. All function switches (-20dBm,GND LIFT, PHASE) should be tested as well-functions

(1) When -20dBm is pushed down, LEVEL will be reduced to -20 dBm±2dBm (2) When both -20dBm buttons are pushed down, LEVEL will be reduced to -40

dBm±4dBm

(3) GND (Ground) LIFT button is to separate output and input ground.

2. Phantom power test (1) aMICTUBE (PHANTOM +48V) can be used to test that if the wire assemblies of DI1, PIN 9, pass through voltage on 8.5V±0.5V or not. (2) When you use phantom power, the LED indicator for power is illuminated. However, if you use battery, then the indicator will flash.

Original settings for products:

1. All functions are in “OFF” mode.

2. Products should pass final test.

DI1-ALTO

Midprod NO

NO.

Quanity

Unit

7. Electrical Parts List

Structure Needing Material Detail List

建檔日: 2002/07/06 2002/08/09修正日:

A-DI1-ALTO1 1.000 PCS A-DI1-底板組合2 1.000 PCS A-DI1-前板組合3 1.000 PCS P-DI1FP-SMD4 1.000 PCS P-DI1FP-DIP5 1.000 PCS P-DI1PU-SMD6 1.000 PCS P-DI1PU-DIP7 1.000 PCS P-DI4IN(DI1)8 1.000 PCS

Page 1 of 1

2002/10/26

DI1-ALTO

panel

1

MA03379

PCS

1.000

DI1 ALTO

top cover

2

MC00424

PCS

1.000

DI1

rear board

3

MB02312

PCS

1.000

DI1

battery cover

4

MI01412

PCS

1.000

DI1

header wiring AF:W141

5

HLSF141

PCS

1.000

2P plus 9V battery clip 220m/m

6

NPL287

PCS

6.000

φ3*W6*18.3 black ABS

black plated screw

7

MSCB28

PCS

5.000

flat self 3*4

DI1FP, DI1PU

black plated screw

8

MSCB38

PCS

4.000

3*7

面板

black-plated screw

9

MSCB13

PCS

10.000

cross-head pan head 3*6

上蓋,後板,前板

black plated screw

10

MSCB58

PCS

4.000

iron-board pill 3*10

平衡座

self-paste foot pad(SF-004)

11

NLXM39

PCS

4.000

12.7*9.0*3.0t

PE bag

12

NWCP01WW0200*0220

PCS

1.000

20*22cm

lockable bag

13

NWCP04

PCS

1.000

5*7

desiccant

14

HEM-002

PCS

1.000

10g

MIC stand nut

15

ME00060

PCS

2.000

JY-6351G-02-250

mic stand washer

16

MF00061

PCS

2.000

JY-6351G-02-250

box17NB01832

PCS

1.000

DI1 ALTO

instruction

18

NF00968

PCS

1.000

DI1 ALTO

assurance book

19

NMCQ-073

1.000

ALTO

black plated screw

20

MSCB39

PCS

1.000

φ12*14

paper outter case 8hole

21

POA002

PCS

0.125

aVERB

EV bubble sponge

22

ND00209

PCS

1.000

40*15*5

label

23

NE04366

2.000

DI1 ALTO

label

24

NE05004

4.000

ALTO

label

25

NE07650

PCS

4.000

DI1 機種條碼

DI1 AMPItem No: specify:

Mid No: A-DI1-ALTO standard quantity: 1.000

Page 1 of 1

MARK:

Item Name SpecificNO Material No

UnitQuanity Ps

MARK:

2002/10/26

DI1-ALTO

barrier

1

MI01409

PCS

1.000

DI1

rear board

2

MB02316

PCS

1.000

DI1

iron pillar

3

MMC013

PCS

1.000

hexagon 6.35*M3*6

DI1 AMPItem No: specify:

Mid No: A-DI1-底板組合 standard quantity: 1.000

Page 1 of 1

MARK:

Item Name SpecificNO Material No

UnitQuanity Ps

2002/10/26

DI1-ALTO

front board

1

MI01406

PCS

1.000

DI1

iron pillar

2

MMC013

PCS

4.000

hexagon 6.35*M3*6

DI1 AMPItem No: specify:

Mid No: A-DI1-前板組合 standard quantity: 1.000

Page 1 of 1

MARK:

Item Name SpecificNO Material No

UnitQuanity Ps

2002/10/26

DI1-ALTO

PC board

1

HB00706

PCS

1.000

DI1FP(1*4)_VER020502

resistor

2

RD00368

R

PCS

2.000

16.5KΩ ±1% 0603

SMD 1/10W precise resistor

3

RPCA2249

R

PCS

1.000

24.9KΩ ±1% 0603

resistor

4

RD00290

R

PCS

3.000

47.5KΩ ±1% 0603

resistor

5

RD00371

R

PCS

2.000

51.1KΩ ±1% 0603

SMD 1/10W fixed resistor

6

RFCF010

R

PCS

1.000

10Ω ±5% 0603

SMD 1/10W fixed resistor

7

RFCF033

R

PCS

1.000

33Ω ±5% 0603

SMD 1/10W fixed resistor

8

RFCF047

R

PCS

2.000

47Ω ±5% 0603

SMD 1/10W fixed resistor

9

RFCF247

R

PCS

1.000

4.7KΩ ±5% 0603

SMD 1/10W fixed resistor

10

RFCF410

R

PCS

2.000

100KΩ ±5% 0603

SMD 1/10W fixed resistor

11

RFCF412

R

PCS

1.000

120KΩ ±5% 0603

SMD 1/10W fixed resistor

12

RFCF447

R

PCS

2.000

470KΩ ±5% 0603

SMD 1/10W fixed resistor

13

RFCF510

R

PCS

1.000

1.0MΩ ±5% 0603

diode

14

SE00029

D

PCS

2.000

FM103

SMD rectifier diode

15

DRS0005

D

PCS

5.000

RLS4148 0.5A (LL-34)

SMD0603 ceramic capacitor

16

CCE410F

C

PCS

3.000

0.1uF Y5V+80 -20%50V

SMD integraded circuit

17

SICS202

IC

PCS

1.000

NJM2068M-TE1(LM833D)

SMD transistor

18

STRS201

Q

PCS

1.000

2SC2412K(R)(MMBT3904LT1)

DI1 AMPItem No: specify:

Mid No: P-DI1FP-SMD standard quantity: 1.000

Page 1 of 1

MARK:

14 19

5

15 17 18

6 8

2

21

20 3

4

12 13

Item Name SpecificNO Material No

UnitQuanity Ps

MARK:

16

1 7

11

2 3

1 4 5 6 7

4 5 9

1

2002/10/26

DI1-ALTO

electrotytic capacitor

1

CE447G

C

PCS

1.000

0.47/50V ψ4*7

electrotytic capacitor

2

CE710E

C

PCS

3.000

100/25V

electrolytic capacitor

3

CE747D

C

PCS

1.000

470/16V

mylar capacitor

4

CL333G

C

PCS

1.000

0.033/50V

sw5HI00162

SW

PCS

6.000

PS-22E8552L(3.3x3.3)

L.E.D high intensity

6

DL37RR

SLE

PCS

1.000

3m/m round(red)long foot 26mm

7

HA02084

CN

PCS

1.000

10P-10P 220mm

row-wire header

8

HCSI0202

CN

PCS

1.000

2P 2.5mm 180°

LED separating pillar

9

NI01766

PCS

1.000

LEDS-19 19mm

zener diode

10

DZA11V

ZD

PCS

1.000

1/2W 11V 11B3

capacitor

11

CB00129

C

PCS

1.000

470uF/16V 85℃ 低漏電 φ8*12

DI1 AMPItem No: specify:

Mid No: P-DI1FP-DIP standard quantity: 1.000

Page 1 of 1

MARK:

1

2 3 7

8

6

1 2 3 4 5 6

1

2

1

Item Name SpecificNO Material No

UnitQuanity Ps

MARK:

10

2002/10/26

DI1-ALTO

PC board

1

HB00707

PCS

1.000

DI1PU(1*4)_VER020624

SMD 1/10W precise resistor

2

RPCA1118

R

PCS

1.000

1.18KΩ ±1% 0603

resistor

3

RD00357

R

PCS

1.000

3.32KΩ ±1% 0603

resistor

4

RD00371

R

PCS

1.000

51.1KΩ ±1% 0603

SMD 1/10W fixed resistor

5

RFCF247

R

PCS

1.000

4.7KΩ ±5% 0603

SMD0603 ceramic capacitor

6

CCE110B

C

PCS

1.000

100PF NPO ±5% -50V

SMD0603 ceramic capacitor

7

CCE147B

C

PCS

1.000

470PF NPO ±5﹪ -50V

SMD0603 ceramic capacitor

8

CCE210I

C

PCS

1.000

0.001uF X7R ±10% -50V

SMD0603 ceramic capacitor

9

CCE410F

C

PCS

1.000

0.1uF Y5V+80 -20%50V

SMD transistor

10

STRS201

TR

PCS

2.000

2SC2412K(R)(MMBT3904LT1)

diode

11

SE00030

D

PCS

1.000

SFS1B

integratedcircuit

12

SD00133

IC

PCS

1.000

MC34063ACD

SMD 1/10W fixed resistor

13

RFCF182

R

PCS

2.000

820Ω ±5% 0603

DI1 AMPItem No: specify:

Mid No: P-DI1PU-SMD standard quantity: 1.000

Page 1 of 1

MARK:

1

2

4

6

5

3

7

6

1 2

Item Name SpecificNO Material No

UnitQuanity Ps

MARK:

1

5 7

2002/10/26

DI1-ALTO

zener diode

1

DZA15V

D

PCS

1.000

1/2W 15V 15B3

inductance

2

CN00038

L

PCS

1.000

220uH(LGA0307-221K)

electrotytic capacitor

3

CE710E

C

PCS

2.000

100/25V

1/4W fixed resistor

4

RFBG10S

R

PCS

2.000

1.0Ω S type

electrotytic capacitor

5

CE747E-1

C

PCS

1.000

470uF/25V 105℃ φ10*16

row wire header

6

HCSV0210

CN

PCS

1.000

10P 2.0mm 180°

transformer

7

TF00059

T

PCS

1.000

OT-DI1

MIC jack for balance

8

HCSM40

CN

PCS

1.000

99M-108SP1

shape male

9

HC00405

CN

PCS

1.000

99M-107SP1L2 母插90°NO PUSH地線不接PIN1

transformer

10

TC00110

T

PCS

1.000

SBH1511-01

separting shade

11

MI01404

T

PCS

1.000

DI411/4W fixed resistor

12

RFB027S

R

PCS

1.000

27Ω S type

ceramic capacitor

13

CC410F-1

C

PCS

1.000

0.1uF SL

DI1 AMPItem No: specify:

Mid No: P-DI1PU-DIP standard quantity: 1.000

Page 1 of 1

MARK:

2

2 4

3 8

1

5

2

Item Name SpecificNO Material No

UnitQuanity Ps

MARK:

10

8

2002/10/26

DI1-ALTO

PC board

1

HB00712

PCS

1.000

DI4IN(1*24)_VER020624

MIC jack

2

HC00125

CN

PCS

2.000

JY-6351G-02-250

DI1 AMPItem No: specify:

Mid No: P-DI4IN(DI1) standard quantity: 1.000

Page 1 of 1

MARK:

4 5

Item Name SpecificNO Material No

UnitQuanity Ps

8. Exploded Views