Alto AVerbllm SERVICE MANUAL

Service Manual

Model: VERB II

40-BIT DIGITAL EFFECTS MODULE

www.altoproaudio.com

CONTENTS

1. INTRODUCTION

2. SPECIFICATION

3. BLOCK DIAGRAM

4. SCHEMATIC DIAGRAM

5. PCB LAYOUT

6. TEST PROCEDURE

7. BOM

8. EXPLODED VIEWS & MECHANICAL PARTS LIST

Robust and Compact Design

1. INTRODUCTION

- 1 -

40-bit Digital Audio Processor

16 Great Sounding Programs

Variation adjust knob (16 positions)

256 presets in total

Analog Mix (Dry/Wet) control

User adjustable Input and Output Gain

Stereo/Mono Jack Inputs

LED control for digital overdrive

Easy to operate Front Panel controls

SMT Design for greater reliability

Short Signal Path and no internal cabling to provide superior sound

Manufactured under QS9000, VDA6.1 Quality System

Electrical

2. SPECIFICATION

- 2 -

Frequency Response +0.5 / -1.5 dB from 20 Hz to 20 kHz

S/N Ratio (process) 80 dB "A" wtg, 20 Hz-22 kHz

S/N Ratio (bypass) >90 dB "A" wtg, 20 Hz-22 kHz

THD+Noise <0.008% @ 1 kHz (0 dBv, bypass)

Input

Number of Channels 2

Format 1/4" unbalanced

Maximum Level (bypass) +9 dBu

Impedance >500 kOhms

A/D - D/A Conversions

A/D converter 1 bit Sigma-Delta

D/A converter 1 bit Sigma-Delta

Output

Number of Channels 2

Format 1/4" unbalanced

Maximum Level (bypass) +9 dBu

Output Impedance <500 Ohms

Front Panel

Controls IN/OUT levels (ANALOG)

PROGRAM selections (2 knobs)

Indicators Power, Signal clip LED

Rear Panel

Input (LEFT/MONO, RIGHT) 1/4" 2-conductor (mono)

Output (LEFT, RIGHT) 1/4" 2-conductor (mono)

BYPASS 1/4" 2-conductor (auto-sense pedal type) for

momentary footswitches

Power 9 Volt AC Power Adaptor

Processing and Memory

Processor Speed 12 MIPs (million instructions per second)

Internal DSP resolution 52-bit MPY accumulator

Main Preset Programs 16

Preset Total Combinations 256

Internal digital audio memory 3000 milliseconds

Physical

Net Weight 0.76 kg (1.26 lb)

Dimension 197(W)×131(D)×44(H)mm (7.76" × 5.12"× 1.73")

OUTPUT GAIN

3. BLOCK DIAGRAM

- 3 -

L OUTPUT

R OUTPUT

OUTPUT GAIN

Singal LED

MIX

BYPASS

LOUT

MUTE

LIN

Input gain

L IN

If only LIN Input :

CHEE

MIX

ROUT

Distortion detect

RIN

Input gain

1.LIN MONO

2.RIN OPEN

R IN

4. SCHEMATIC DIAGRAM

D

- 5 -

8

DGND

U6D

Text

U6F

74HC14

74HC14

8 9

12 13

C

(MUTE)

B

PJ5

6

D6

RLS4148

A2K

1

+5V

12

R33

10K

MIC6PIN

12345

R42

220R

C42

DGND

1uF

DGND

A

VER070615

21 of

YONG QIAN YAO

Revision

Drawn By:

Sheet

U6A

74HC14

7654321

AR2

680R*4

+5V

AR1

680R*4

12

14

J

CLK

Q

U5B

74HC109

10

COM

EN2

124

288S0366

134

7 8
5 6
3 4
1 2

COM

124

EN1

288S0366

134

7 8
5 6
3 4
1 2

12345678910

DGND

13

K

R

15

S

11

Q

9

R35

47K

PRESETVARIATION

8

6

DGND DGND

8

6

+5V

4

6

RS

TG2TH

DS

7

CTR

OUT

U8A

NE555

3

U6C

74HC14

5 6

5

DGND

C39

10uF

DGND

DGND

DGND

C35

100nF

+5V

R32

+5V

R31

10K

R30

R46

470R

D5

RLS4148

A2K

1

10K

2

4

J

CLK

Q

U5A

74HC109

6

10K

R29

10K

TR2

BR

R28

TR1

U6B

74HC14

3 4

1112

1314

1516

R44

470R

R45

470R

C41

1uF

DGND

3

K

R

S

Q

7

DGND

1

5

84

+5VA

147

C20

100nF

U4C

LM393

4066

U7E

C43

47uF/25V

AGND

C21

100nF

-5V

AGND

10K

DGNDDGND

R47

100R

AGND2

JP1

C40

BR

+5V

C38

10uF

100nF

aVERB II

23-Jun-2007

HB0254~1.SCH

File:

Date:

MUTE1

CN2

HEADER 8X2

+5V

R14

10K

MUTE1

R10

U7B

4066

12

U7A

4066

6

10K

C30

1.5nF

11 10

9 8

R9

C24

22P

C33

33P

AGND

3

2

10K

R8

R3

10K

U3A

TL074CD

1

10K

5

6

R1

100R

AGND AGND

U3B

TL074CD

7

MUTE2

U7C

4066

5

4 3

U7D

4066

13

1 2

SGND

R27

10K

C34

33P

AGND

12

R25

10K

C32

1.5nF

C28

22P

13

R24

10K

R18

R6

U3D

TL074CD

14

10K

10

9

AGND AGND

10K

U3C

TL074CD

8

R2

100R

R26

C29

22P

R22

10K

C31

1.5nF

C27

22P

R34

10K

R16

10K

14

10K

R17

10K

U2D

TL074CD

12

13

AGNDAGND

R21

10K

8

U2C

TL074CD

9

10

MUTE2

D4

RLS4148

D7

RLS4148

D1

RLS4148

R43

820K

R40

7K5

R38

1M

5

R39

2M2

C36

R37

100nF

R41

6

U4B

LM393

7

1K

3

2

U4A

LD1

RED

R36

4K7

+5VA

1

AGND

220R

AGND

AGND

LM393

147

C37

100nF

168

U5C

74HC109

81

TPVERBIO.SCH

U6G

74HC14

DGND

U8B

NE555

C7

4.7uF

OUTPUTL

D

C23

4.7uF

PEAK(FLICKER)

MUTE(GLOW)

OUTPUTR

INPUTR

C

INPUTL

B

A

1 2 3 4 5 6 7 8

D

- 6 -

C

B

A

R-OUT

L-OUT

22 of

PJ3

4

5

6

MIC6PIN

1

2

3

PJ4

4

5

6

MIC6PIN

1

2

3

VERB070615

YONG QIAN YAO

RevisionModel No:

4

L1

BLM21A102

C14

R20

270R

1

U2A

TL074CD

3

3

2

2

VR3A

A10K

OUTPUT-A

1

R11

10K

321

2

VR2A

1

B1K

MIXER-A

3

AGND2

L6

BLM21A102

AGND

10nF

R23

270R

7

C48

47P

C26

10nF

U2B

TL074CD

6

5

AGND

VR3B

A10K

OUTPUT-B

R19

10K

VR2B

4

6

5

4

5

B1K

MIXER-B

6

AGND

AGND2

C45

100nF

AGND

411

U3E

AGND

Drawn By:

C51

100nF

Sheet

TL074CD

C44

100nF

C49

47P

411

+5VA

U2E

AGND

C50

100nF

-5V

AlphaverbII

aVERB II

23-Jun-2007

HB0254~2.SCH

TL074CD

A3

Size

File:

Date:

C18

411

+5VA +5VA

100nF

U1E

AGND

C19

100nF

-5V -5V

Titel

TL074CD

L7

BLM21A102

+5V

L2

INPUTR

AGND

1M

C8

47uF/25V

OUTPUTL

C46

47P

C17

47uF/25V

14

U1D

TL074CD

6

12

13

5

INTPUT-B

VR1B

A10K

4

R15

10K

C16

7

U1B

TL074CD

5

AGND

R12

AGNDAGND2

47uF/25V

AS1

6

1K

C25

220P

L5

C13

OUTPUTR

VR1A

R7

47uF/25V

8

U1C

TL074CD

3

9

10

2

INTPUT-A

A10K

1

10K

C12

1

U1A

TL074CD

3

R4

47uF/25V

AS2

2

R5

1K

C9

220P

L4

INPUTL

C15

47uF/25V

C47

47P

AGND

(C10=f 10*20mm)

1M

R13

AGND

AGNDAGND2

LF22uH

C5

0.1UF

C3

100uF/16V

Vout

GND

Vin

U10LM7805

+VCC

C10

1

1000uF/25V

K
A

D2

1N4002

2

1

3

SW1A

2
34

BLM21A102

1 2

BLM21A102

1

2

3

4

5

6

PJ1

MIC6PIN

5

6

PJ2

R-INPUT

1

2

3

4

L10

PLT09H-2003R

MIC6PIN

L-INPUT

(MONO IN)

-5VSGND

LD2

L3

LF22uH

SGNDSGNDSGND

R48

4K7

-5VO

3

RED

SGND

C6

0.1UF

C4

100uF/16V

Vout

G

1

Vin

C1

U9 LM7905

0.1UF

2

C2

0.1UF

SGND

2

SGND

SGND SGND SGND SGND

C11

220uF/25V

A

D3

K

1N4002

C22

1

100nF

SGND

P1

STARTGND

AGND2AGND

L8

BLM21A102

SGND

6 1

312

L12

SW3*3

PS1

RX110

BLM21A102

SGND

L11

BLM21A102

J1

DGND

1 2 3 4

AC 9V INPUT

D

C

B

A

5. PCB LAYOUT

- 7 -

- 8 -

The Finished Product Test Procedure of aVERB II

6. TEST PROCEDURE

1. Test Instruments:

a. Dual oscillagraph

b. AP (ATS-2 or System Two)

c. AC power supply or AC/DC Adapter: 9V

2. Instruments setting:

a. Connect the signal generator or AP output signal to L (Mono) Input (unbal-GND, 20 Ohm

Z-Out), and the AP input to L, R (BNC-Unbal).

b. BW: 22Hz 22 KHz, FLTR: A Weighting.

c. Adjust the AP output signal to sine waveform 1 KHz, -20dbm.

3. Test Procedure:

a. After connecting the voltage converter (9V) to the AC socket, the PWR (Red) will light up.

b. Rotate the “VARIATIONS” (the smaller knob) to “1” position, and the “PRESETS” (the larger

one) to “ HALL1” position.

c. Rotate the “INPUT”, “OUTPUT” knobs to maximum, the ”MIX” to minimum, the L/R output

signal is -20dbm (±2dbm), when rotate the “INPUT”, “OUTPUT” knobs to minimum, there is

no output signal. (Rotate the “INPUT”, “OUTPUT” knobs to maximum after the test is

finished)

d. rotate the “MIX” knob to maximum, L: -14dbm ( 2dbm), R: -20dbm ( 2dbm). During rotating

this knob from minimum to maximum, the effect will be changed.

e. The “ PRESET” knob has 16 functions in this aVERB II, the testing parameter please see the

below table (the “ LEVEL” parameter is the reference).

No. PRESETS L-OUT/R-OUT LEVEL (±2dbm) Note

1 HALL1 -14.0 dbm/-20 .0dbm

2 HALL2 -11.0 dbm/-8.0 dbm

3 HALL3 -19.0 dbm/-13.0 dbm

4 SPRING1 -18.0 dbm/-17.0 dbm

5 SPRING2 -18.0 dbm/-19.0 dbm

6 TAPE -17.0 dbm/-17.0 dbm

7 PLATE1 -16.0 dbm/-27.0 dbm

8 PLATE2 -17.0 dbm/-17.0 dbm

9 TREMOLO XXX

10 CHORUS -17.0 dbm/-17.0 dbm

11 FLANGE XXX

12 DELAY -16.0 dbm/-16.0 dbm

The signal will be changed (-17 -19

-17 dbm)

The signal will be changed (-9 -26

-9 dbm)

No. PRESETS L-OUT/R-OUT LEVEL (±2dbm) Note

- 10 -

13 DELAY/REV. -11.0 dbm/-14.0 dbm

14 FLANGE/REV. XXX The changed signal (the waveform

strongly changed)

15 CHORUS/REV. XXX The changed signal (the waveform

strongly changed)

16 ROTARY XXX The changed signal (the waveform

strongly changed)

f. Rotate the “ VARIATIONS” (the smaller one) from “1” position, the effect will be changed (it

presents the waveform will be strongly changed), and the “ SIGNAL” (red) LED will blink.

g. rotate the “MIX” knob to minimum, connect the AP output to Right Input, at this moment, only

the “R” has output, rotate the “PRESET” (the larger knob) to “Delay” position, and the

“ VARIATIONS” (the smaller one) to “1” position, also the “MIX” knob to maximum, the sweep

frequency response curve as below:

h. Test for “BYPASS”: rotate the “ MIX” to maximum, connect the footswitch to “BYPASS” jack,

this footswitch can control the DSP effect.

i. When turn off the input signal, the output noise is <-70dbm.

j. Spot-check: to know if there is another noise and the DSP effect is OK.

k. Factory Preset: rotate the “INPUT”, “OUTPUT”, and “MIX” knobs to minimum, the

“ VARIATIONS” (the smaller knob) to “1” position, and the “ PRESETS” (the larger one) to

“ HALL1” position.

k

Y

PF03857

S

_

A

_

_

_

r

r

t

A

0

A

A

A

A

A

k

V

k

r

r

7. BOM

- 11 -

0001
0002
0003

0004

0005
0006
0007
0008
0009
0010
0011
0012
0013

0014

0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025

0001
0002

0003

0004

0005
0006
0007
0008

0009

0010
0011
0012
0013

0014

0015
0016

Ran

0001

0002

0003

0004

Part No. Description Specification QT

DIGITAL

MULTIEFFECT
MA07059 panel-RS
MB05584 chassis-RS
MC00992 top cover-RS

NI00363 knob-RS

NI02386 konb-RS φ14*13mm 1
NI04996 knob-RS φ11*19(5445C)_V1.0 3
NI04999 knob-RS φ8.5*4(123U)_V1.0 2
NI04998 knob-RS φ8.5*4(298C)_V1.0 1
MG00025 screw-RS M3*6 6
MG00163 screw M3*8 2
NI00002 plastic nut-RS φ7/16"*G20/15*4.8 5
MF00014 washe
NC00131 washe

TG00023 adaptor

HJ00002 dessican
NA00122 PE bag 0.04t*350*230mm 1
NA00146 bubble bag 13*16 1
NI00501 self-adhere foot cushion 12.7*9*3t(SF-004) 4
NE05006 label-RS
NE05004 label
NE02717 label MADE IN CHIN
NF00061 assurance card-RS-C

D00012 twin adhesive-RS 90*120mm_V1.0 1
NA00279 clip-chain bag 0.04t*100*150mm_V1.0 1
HK08950 PC board
CB00072 electrolytic capacitor 1000uF/25V φ10*20mm 1 C10
HI00192 rotary switch 288S0366 2 EN1,EN2

RC00086 potentiometer

RC00087 potentiometer

HC00108 stereo MIC jac
HC00183 DC jack-RS KJ-36-S φ3.5 1 J1
SA00094 rectifier diode 1N4002/100
SD00074 integrated circuit L7805CV(TO220)/(ST) 1 U10

SB00083

SA00053 L.E.D φ3 round(red)long foot 2 LD1,LD2
MI00256 heat-sin
MF00037 washe
MG00166 screw M3*10 1

HC00473 connector-RS

NI02249 plastic washe
HK08951 PC board

CI00007

CI00009

CI00012

CI00018

voltage stabilized
transistor-RS-ACT

SMD ceramic capacitor
0805
SMD ceramic capacitor
0805
SMD ceramic capacitor
0805
SMD ceramic capacitor
0805

aVERB

ALTO_230V_CHIN

αVERB ALTO
αVERB

aVERB
φ21*16mm COOL GRAY
8C/072C_V1.1

φ3*φ6.5*0.5t 2
1*φ11.3*φ15.3 red 5
230V/50Hz_AC9V/300mA_E
T-35_CE
10g 1

LPHAVERB_V1.
LTO 4

LTO_V1.1 1

P-aVERB -N2-DIP

A10KΩ*2 RV16A01-20-20F-

14-301
B1KΩ*2 RV16A01-20-20F­B13-301
φ6.3 stereo LJB0661-6 5 PJ1,PJ2,PJ3,PJ4,PJ5

UTC79L05(TO92)/(UTC) 1 U9

25*15*10.6-1PIN SCL-2020 1
φ3.2*φ5.5*1t 1

2.45mm 180° 2*8P B25­2*8BG1(B)H=5mm
TW-1(TO-220) 1
P-aVERB -N2-SMD

22PF/50V NPO 4 C24,C27,C28,C29

33PF/50V NPO 2 C33,C34

47PF/50V NPO 4 C46,C47,C48,C49

220PF/50V NPO ±5% 2 C9,C25

V1.0
V1.0
V1.0

1

1
1
1

1

1

4

2

1

2 VR1,VR3

1 VR2

2 D2,D3

1 CN2

1

Remark

Ran

k

Y

)

0005

0006

0007
0008
0009
0010
0011
0012
0013
0014

0015

0016
0017
0018
0019

0020

0021
0022
0023
0024
0025
0026
0027

0028

0029

Part No. Description Specification QT

C1,C2,C5,C6,C18,

CI00100

CI00112

RD00002 SMD fixed resistor 1/8W 0.0Ω ±5% 0805 1 JP1
RD00006 SMD fixed resistor 1/8W 100Ω ±5% 0805 3 R1,R2,R47
RD00009 SMD fixed resistor 1/8W 220Ω ±5% 0805 2 R41,R42
RD00010 SMD fixed resistor 1/8W 270Ω ±5% 0805 2 R20,R23
RD00014 SMD fixed resistor 1/8W 470Ω ±5% 0805 3 R44,R45,R46
RD00018 SMD fixed resistor 1/8W 1.0KΩ ±5% 0805 3 R4,R12,R37
RD00027 SMD fixed resistor 1/8W 4.7KΩ ±5% 0805 1 R36
RD00031 SMD fixed resistor 1/8W 7.5KΩ ±5% 0805 1 R40

RD00032 SMD fixed resistor 1/8W 10KΩ ±5% 0805 26

RD00044 SMD fixed resistor 1/8W 47KΩ ±5% 0805 1 R35
RD00056 SMD fixed resistor 1/8W 1.0MΩ ±5% 0805 3 R5,R13,R38
RD00057 SMD fixed resistor 1/8W 2.2MΩ ±5% 0805 1 R39
RD00267 SMD fixed resistor 1/8W 820KΩ ±5% 0805 1 R43

RE00011

SE00011 SMD rectifier diode RLS4148 0.5A (LL-34) 5 D1,D4,D5,D6,D7
SF00056 transistor MMBT3904(SOT23)/(PHI) 2 TR1,TR2
SG00001 SMD integrated circuit TL074CDT(SO14)/(ST) 3 U1,U2,U3
SG00306 SMD integrated circuit LM393DR(TI)/(MEXICO) 1 U4
SG00044 SMD integrated circuit BU4066F(SOT73)/(PHI) 1 U7
SG00068 SMD integrated circuit 74HC14DT(SO14)/(PHI) 1 U6
SG00469 SMD integrated circuit- SN74HC109DR(SO16)/(TI) 1 U5

AE00449

HK08952 PC board
CB00189 electrolytic capacitor 1.0uF/50V φ4*5mm 2 C41,C42

0001

CB00190 electrolytic capacitor 4.7uF/25V φ4*7mm 2 C7,C23

0002

CB00192 electrolytic capacitor 10uF/16V φ4*7mm 2 C39,C40

0003

CB00194 electrolytic capacitor 47uF/25V φ5*11mm 7

0004

CB00195 electrolytic capacitor 100uF/16V φ6*7mm 2 C3,C4

0005

CB00251 electrolytic capacitor 220UF/25V φ8*11mm 1 C11

0006

CF00143 metal-film capacitor 0.0015uF/100V 5% CASE01 3 C30,C31,C32

0007

HA01919 jump 5mm 25

0008

HA02441 jump 7.5mm 30

0009

HA01925 jump 10mm 22

0010

HA01935 jump 12.5mm 6 J63,J64,J68,J70,J71,J17

0011

HA01924 jump 9mm 2 J21,J22

0012

SMD ceramic capacitor
0805

SMD ceramic capacitor
0805

SMD resistor networks
1/16W

solder material without
lead

0.1uF/50V X7R ±10% 17

0.01uF/50V X7R ±10% 2 C14,C26

680Ω*4 ±5% 8P
1206(0603x4

9308/Sn Ag Cu 0.3768

P-aVERB -N2-AI

C19,C20,C21,C22,
C35,C36,C37,C38,
C44,C45,C50,C51

R3,R6,R7,R8,R9,R10,
R11,R14,R15,R16,R17,
R18,R19,R21,R22,R24,
R25,R26,R27,R28,R29,
R30,R31,R32,R33,R34

2 AR1,AR2

1

C8,C12,C13,C15,C16,
C17,C43

L1,L2,L3,L4,L5,L6,L7,
L8,L11,L12,L10,L13,
PS1,J28,J29,J37,J40,
J41,J43,J45,J46,J47,
J51,J72,PS1
J50,J49,J48,J44,J42,
J36,J35,J34,J33,J32,
J30,J23,J27,J26,J25,
J24,J18,J16,J15,J12,
J11,J10,J9,J8,J7,J6,
J66,J67,J73,J74
J62,J61,J60,J59,J58,
J57,J56,J55,J54,J53,
J52,J39,J38,J20,J19,
J14,J5,J4,J3,J2,J65,J69

Remark

- 12 -

k

Y

A

5

A

t

5

)

Z

b

T

r

r

r

5

r

)

T

)

)

A

0026

O

_

_

T

0027
0028
0029
0030

Ran

0017
0018
0019
0020
0021
0022

0023

0030

0001

0002

0003
0004
0005

0006

0007

Part No. Description Specification QT

HA01930 jump 15mm 1 J31

0013

HB02541 PCB-RS

0014

SG00243 SMD integrated circuit NE555DR(SO8)/(TI) 1 U8

C00179 tin without lead-RS M705E Sn 3Ag-0.5Cu 8.6
NI01776 LED spacer suppor
ME0001
MG00036 screw M3*4 4
MG00284 copper pillar M3*8*0.5PH 4
HK04336 PC board P-313123-DIP(TOPVerb
SC00004 crystal oscillator 16.00MH

HC00512 connector

SG00300 SMD integrated circuit SST39VF010-70n/TOPVer
NE13363 label TOPVerb_V1.0 1
HK03894 PC board-RS-AC
HB00895 PCB 313123/2(1*6) 1

0001

CI00075

0002

RD00061 SMD fixed resisto

0003

RD00068

0004

RD00073 SMD fixed resisto

0005

RD00085

0006

RD00088

0007

RD00101 SMD fixed resisto

0008

RD0012

0009

RE00006

0010

SE00011 SMD rectifier diode RLS4148 0.5A (LL-34) 1 D1

0011

SG00068 SMD integrated circuit 74HC14DT(SO14)/(PHI) 1 IC1

0012

SG00410

0013

SG00166 SMD integrated circuit TY-2 1 IC3

0014

SG00037 SMD integrated circuit LD1117DT33C(TO252)/(ST

0015

HC00611 IC socket (SMD) PLCC32 (AMP S/N:822516

0016

SG00016 SMD integrated circuit UDA1345TS(SSOP28)/(PHI

0017

AE00449

0018

CI00264

0019

C00179 tin without lead-RS M705E Sn 3Ag-0.5Cu 5.058

CB00166 electrolytic capacitor 100uF/16V φ6*5mm 11

RA01234 fixed resistor 1/4W 4.7KΩ 1 R48

NB02141 carton

NB05581 inner case-RS
MG00538 screw M3*10*0.5PH_V1.0 4
NF02910 user manual-RS
NE05847 label-RS-AC

color nut 3m/m 4

SMD ceramic capacitor
0603

SMD fixed resistor
1/10W

SMD fixed resistor
1/10W
SMD fixed resistor
1/10W

SMD fixed resisto
SMD resistor networks
1/16W

SMD integrated circuit­RS-AC

solder material without
lead
SMD ceramic capacitor­RS 0603

lphaverb_VER07061

LED-3 3mm 2

2.54 180°2*8P(gold-plated)
4/9.5mm

P-313123-SMD(L-8) 1

0.1uF/50V Y5V +80,-20% 13

10Ω ±5% 0603 1 R22

100Ω ±5% 0603 8

220Ω ±5% 0603 1 R3

1.5KΩ ±5% 0603 10

2.2KΩ ±5% 0603 8

10KΩ ±5% 0603 3 R32,R31,R1

1.0MΩ ±5% 0603 1 R2
100KΩ*4 ±5% 8P
1206(0603x4

IC41LV16256­35KG(SOJ40)/(ICSI)

9308/Sn Ag Cu 0.3864

15PF/50V NPO ±5

a VERB;a COMP;a
MICTUBE ALT

αVERB ALTO

αVERB ALTO

aVERB II_V1.0 1

V1.0

V1.0

Remark

1

1
1 XT

1 CN2

1 IC4

C17,C15,C18,C6,C10,
C22,C20,C13,C14,C1,
C3,C4,C11

R12,R14,R7,R8,R34,
R17,R13,R33

R16,R15,R21,R20,R4,
R19,R10,R18,R9,R5
R28,R27,R23,R24,
R29,R30,R25,R26

2 AR1,AR2

1 IC6

1 IC2
1 IC4
1 IC5

2 C8,C9

C19,C12,C5,C2,
C24,C16,C21,C25,
C26,C28,C7

1

1

1

- 13 -

8. EXPLODED VIEWS & MECHANICAL PARTS LIST

- 14 -

No. Part No. Description Specification QTY

(

)

p

φ

_

p

φ

p

φ

φ

pp

p

φ3*φ

(

)

p

_

φ

φ

p

φ

y)_

- 15 -

MECHANICAL PARTS LIST

1 NI00501 self-adhesive foot cushion-RS 12.7*9*3t
2 NI00363
3 NI00002
4 NI02386
5 NC00131 T-washer-RS-ACT 1*
6 MG0028 co
7 MF00014 washer-RS-ACT-zinc

lastic knob-RS-C
lastic nut-RS
lastic knob-RS-C

21*16mm COOL GRAY 8C 072C
7/16"*G20/15*4.8 5
14*13mm (cool gray 8C 072C 1

11.3*φ15.3 red 5

er pillar-RS M3*8*0.5PH 14 4

lated

SF-004

6.5*0.5t 2

4
1

8 MG0003 screw-RS M3*4 4

9 MG0016 nickle screw-RS M3*8 2
10 HK04336 K-PCB 313123-DIP
11 MC0099 ZB-to
12 NI04999 knob-RS-CT-ABS
13 NI04998 knob-RS-CT-ABS
14 NI04996
15 MB05584 ZC-chassis-RS-

16 MA07059 ZC-front panel-RS-5063 blue
17 HK08950 K-PCB

cover-RS-5252

lastic knob-RS-CT-

aVERB

8.5*4(123U yellow)_V1.0 2

8.5*4(298C blue)_V1.0 1
11*19(5445C gra

αVERB _V1.0
αVERB ALTO_V1.0

aVERB -N2-DIP

TOPVerb

V1.0

1
1

V1.0 3

1
1

1
18 MG0002 screw-RS M3*6 6
19 ME00015 color nut-RS 3mm 4