Alto Verb User manual
Service Manual
www.altoproaudio.com
Version: 1.1
Model: αVERB
24x32 BIT DIGITAL EFFECTS
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. SPECIFICATION (aVERB)
Electrical
Frequency Response: +0.5 / -1.5 dB from 20Hz to 20 kHz
S/N Ratio (process) 80 dB "A" wtg, 20 Hz-22kHz
S/N Ratio (bypass) >90 dB "A" wtg, 20 Hz-22kHz
THD+Noise: <0.008% @ 1kHz (0dBV, 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 Input/Output Levels (ANALOG)
PROGRAM selections (2 knobs)
Indicators Power, Signal clip LED
Rear Panel
IN/OUT levels (ANALOG) 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 Transformer
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: 1kg(2.20lb)
Dimension(WxDxH): 200(mm) 150(mm) 45(mm)
(7.87" x 5.91"x 1.77")
1234
A
B
C
D
4
321
D
C
B
A
POWERSUPPLY
VOLTAGEREGULATOR
AC9V
INPUT
+5V
-5V
alphaverb BLOCK DIAGRAM
MEMORY (DRAM)
( U10,U11 )
DSP
ED0-ED7
( U8 TMS57002DPHA ) EA0-EA9
AD0-AD7
MPU
( U9 P87C54UBAA )
PROGRAM
ENCODER A
SO0SI0
OUTPUT R
OUTPUT L
FOOT
SWITCH
INPUTR
INPUTL
PJ1
PJ2
PJ5
PJ3
PJ4
VARIATIONS
ENCODER B
STEREOAUDIOCODEC
( U6 PCM3001E)
A/Dand D/ACONVERTER
Q1
11.0592MHZ
CLOCK DIVIDE
( U7 74HC393)
11.0592MHZ
FOOTSWITCH
CONTROL
(MONO INPUT)
INPUTBUFFER& AMPLIFIER
IN-R IN-L OUT-R OUT-L
INPUT LEVEL
INPUT LEVEL
OUTPUTAMPLIFIER
OUTPUT LEVEL
OUTPUT LEVEL
MIX CONTROL
LRCKIN=43.20KHZ
BCK=1.382MHZ
1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
Title
Number RevisionSize
A3
Date: 8-Jan-2002 Sheet of
File: D:\shung\PC27\ALTO\Digital\AlfaVerb\SCHPCB\alphaverb.ddbDrawn By:
SYPOL 1
BCK0 2
NC 3
NC 4
LRCK0 5
S00 6
S01 7
CAS 8
RAS 9
CLKSEL 10
CLKIN 11
VSS 12
VSS 13
WE 14
ED7 15
ED6 16
ED5 17
ED4 18
ED3 19
ED2 20
ED1 23
NC 21
NC 22
ED0 24
EA0
25 EA1
26 NC
27 EA2
28 NC
29 EA3
30 EA4
31 VSS
32 VCC
33 EA5
34 EA6
35 NC
36 EA7
37 TEST0
38 TEST1
39 TEST2
40
EA8
41 EA9
42 NC
43 NC
44 D0
45 D1
46 D2
47 D3
48 NC
49 D4
50 D5
51 VCC
52 VCC
53 D6
54 D7
55 PC0
56 BIO
57 OVFA
58 OVFM
59 RS
60 NC
61 NC
62 EMPTY
63 MUTE
64
CS 65
R/W 66
PLOAD 67
DREADY 68
CLOAD 69
STRB 70
NC 71
VCC 72
VSS 73
NC 74
BCKI 75
LRCKI 76
NC 77
SI0 78
SI1 79
SYNC 80
U7
TMS57002
P 1.0 2
P 1.1 3
P 1.2 4
P 1.3 5
P 1.4 6
P 1.5 7
P 1.6 8
P 1.7 9
P2.0/A8 24
P2.1/A9 25
P2.2/A10 26
P2.3/A11 27
P2.4/A12 28
P2.5/A13 29
P2.6/A14 30
P2.7/A15 31
P0.7/AD7
36 P0.6/AD6
37 P0.5/AD5
38 P0.4/AD4
39 P0.3/AD3
40 P0.2/AD2
41 P0.1/AD1
42 P0.0/AD0
43
RXD/P3.0
11 TXD/P3.1
13 INT0/P3.2
14
INT1/P3.3
15 T0/P3.4
16
T1/P3.5
17 WR/P3.6
18 RD/P3.7
19
NC 1
NC
12
NC 23
NC 34
RST 10
EA/VPP 35
VSS 22
VDD
44
ALE
33 PSEN
32
XTAL1
21 XTAL2
20
U8
P87C54UBAA OVM
BIO AD7
AD6
AD0
AD1
AD2
AD3
AD4
AD5
VINL
1VCC1
2AGND1
3
VREFL
4VREFR
5
VINR
6CINPR
7CINNR
8CINLN
9CINPL
10
VCOM
11 VOUTR
12
AGND2
13 VCC2
14 VOUTL 15
LRCIN 16
BCKIN 17
DIN 18
DOUT 19
XTI 20
XTO 21
CLKIO 22
VDD 23
DGND 24
FMT2 25
FMT1 26
FMT0 27
RSTB 28
U5
PCM3001E
I/00
1I/01
2
WE
3RAS
4A9
5
A0
9
A1
10 A2
11 A3
12 +5V
13 A4 14
A5 15
A6 16
A7 17
A8 18
OE 22
CAS 23
I/02 24
I/03 25
DGND 26
U9
GM71C4256BJ60 I/00
1I/01
2
WE
3RAS
4A9
5
A0
9
A1
10 A2
11 A3
12 +5V
13 A4 14
A5 15
A6 16
A7 17
A8 18
OE 22
CAS 23
I/02 24
I/03 25
DGND 26
U10
GM71C4256BJ60
5 6
U11C
74HC04D
89
U11D
74HC04D
10 11
U11E
74HC04D
12 13
U11F
74HC04D DGND
JP2
2P-2.5
D4
1N4148 R24
100K
C27
47uF/25V
DGND
C39
100nF
C40
100nF
C41
100nF
R25
4K7
R26
4K7
R27
4K7
R28
4K7
DGND
12
U11A
74HC04D
CLK 1
Q0
3Q1
4Q2
5Q3
6MR 2
U6A
74HC393D
CLK
13 Q0 11
Q1 10
Q2 9
Q3 8
MR
12
U6B
74HC393D
DGND
DGND
DGND
SO0
SO1
BCK
LRCKIN
INPUTL
INPUTR
C38 10uF
C37
10uF
C34
10uF
C36 470P
C35
470P
AGND C30
1uF C31
1uF
R30
100K R29
100K
AGND
OUTPUTLOUTPUTR
LRCKIN
BCK
SO0
SI0
RS-CODEC
DGND Q1
11.0592MHz
C33
22P
C32
22P
DGNDDGND
ED0
ED2
ED3 ED4
ED5 ED6
ED7
ED1
DGND
3 4
U11B
74HC04D
DGND
EA0
EA1
EA2
EA3 EA4
EA5
EA6
EA7
EA8
EA9
EA0
EA1
EA2
EA3 EA4
EA5
EA6
EA7
EA8
EA9
LRCKIN
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
EA0
EA1
EA2
EA3
EA4
EA5
EA6
EA7
ED0
ED1
ED2
ED3
ED4
ED5
ED6
ED7
A15
SI0
SI1
+5V
+5V
+5V
1
2
3
4
5
6
ENCA
288S0121
D3
D0
D1
D2
COM
COM
DGND
1
2
3
4
5
6
ENCB
288S0121
D3
D0
D1
D2
COM
COM
ENCODERB4
ENCODERB1
ENCODERB2
ENCODERB3
ENCODERA1
ENCODERA2
ENCODERA3
ENCODERA4
C42
100nF
C43
100nF
C44
100nF
R32
4K7
R33
4K7
R34
4K7
R35
4K7
+5V
DGND
R31
100R
+5V
+5V
RS-CODEC
+5V
+5V
C28
100nF
C29
1uF
DGND DGND
INPUTR
INPUTL
OUTPUTR
OUTPUTL
Analog Stage & Power supply
a-verbIO.SCH
147
U6C
74HC393D
147
U11G
74HC04D
+5V +5V
DGNDDGND
EA8
EA9
+5V
C99
100nF
C98
100nF
DGND DGND
C97
100nF C96
100nF
DGNDDGND
2
1
3
22
11
33
PJ5
LJB0661-6
FSP
R2
10K R3
1K
C7
100nF
+5V
DGND
Footswitch live
AGND2
R1
220R
DL1
RED
OVM
(OVER-LOAD)
R44
470R
+VCC
DL2
RED
(PWR ON)
DGND
INPUTR
INPUTL
OUTPUTR
OUTPUTL
C95 100nF DGND
C45
82P
DGND
SO0
Footswitch live
(AlphaComp:P87C52UBAA)
LINK
LINK.SCH
WE
WE
BCKI
RST
F11.0592M
STRB
CLOAD
PLOAD
MUTE
EMPTY
CLK-Q3
VOUTR
CAS
VOUTL
1/4W
+5V
+5V
R36
10K
R37
10K
DGND
R40 0R0
R39 0R0
R38 0R0
+5V
KEVIN LIN.
2002/01/06
L9
BLM21A102
R18
100R DGND
R17
4K7
DGND
A-VERBMAIN.SCH
MODEL:ALTO AlphaVERB
RS
1 2 3 4
A
B
C
D
4
321
D
C
B
ATitle
Number RevisionSize
A4
Date: 8-Jan-2002 Sheet of
File: D:\shung\PC27\ALTO\Digital\AlfaVerb\SCHPCB\alphaverb.ddbDrawn By:
AlphaVerb Analog Stage/Power Supply (Included AlphaComp)
2
1
3
22
11
33
PJ1
LJB0661-6 L4
LF22uH VR1A
A10K
C12
47uF/25V
AGNDAGND2
3
21
U1A
TL074CD
C8
47uF/25V
R7
1K C13
47uF/25V
INPUTR
12
13 14
U1D
TL074CD
R6
2K2
R4
1K
AGND
10
98
U4C
TL074CD
R5
1M
OUTPUTR
VR2A
B1K
VR3A
A10K
AGND
R20
270R
3
21
U4A
TL074CD
R11
4K7
C23
680P
AGND
L1
LF22uH
2
1
3
22
11
33
PJ3
LJB0661-6
AGND2
R-OUT
OUTPUT-A
MIXER-A
INTPUT-A
R-INPUT
AGND
L-OUT
L-INPUT
411
U4E
TL074CD
411
U1E
TL074CD
-5V -5V
+5VA +5VA
J1 1
3
4
5
62
SW1
PWR SW
C10
2200uF/25V
C11
220uF/25V
U2 LM7805
U3 LM79L05
C4
100uF/25V C6
10uF/16V
C3
100uF/25V C5
10uF/16V L2
LF22uH
L3
330uH -5VSGND
SGND
SGND SGND SGND SGND
SGNDSGNDSGND
D2
IN4002
D3
IN4002
AC 9V INPUT
C9
220P
AGND
C14
10nF
+5V
2
1
3
22
11
33
PJ2
LJB0661-6 L5
LF22uH VR1B
A10K
C16
47uF/25V
AGNDAGND2
5
67
U1B
TL074CD
C15
47uF/25V
R15
1K C17
47uF/25V
INPUTL
10
98
U1C
TL074CD
R14
2K2
R12
1K
AGND
12
13 14
U4D
TL074CD
R13
1M
OUTPUTL
VR2B
B1K
VR3B
A10K
AGND
R23
270R
5
67
U4B
TL074CD
R19
4K7
C24
680P
AGND
L6
LF22uH
2
1
3
22
11
33
PJ4
LJB0661-6
AGND2
OUTPUT-B
MIXER-B
INTPUT-B
AGND
C25
220P
AGND
C26
10nF
C18
100nF
C19
100nF AGND
C20
100nF
C21
100nF AGND
C2
100uF/25V
C1
100uF/25V
SGND
SGND
C22
100nF
SGND
R21
10K
R22
10K
(opt. alfacomp)
AGND
AGND
(opt alfacomp)
2
1
3
5
4
6
SW2
DPDT
UP=compressor effect
DOWN=bypass
+VCC
(MONO IN)
C46
47P
C47
47P
C48
47P
C49
47P
KEVIN LIN.
L7
BLM21A102
L8
BLM21A102
AGND2AGND
P1
STARTGND
SGND
61
3 4
L10
PLT09H-2003R
L12
BLM21A102
DGND
L11
BLM21A102
PS1
RX110
2002/01/06
A-VERBIO.SCH
MODEL:ALTO AlphaVERB
AS1
AS2
AS3
AS4
AS5
AS6
-5VO
BOTTOM SOLDER MASK
BOTTOM LAYER
TOP SILKSCREEN
BOTTOM SILKSCREEN
Tool Hole Size Hole Count Plated
---------------------------------------------------------------------------
T1 31mil(0.80mm) 203
T2 39mil(1.00mm) 13
T3 47mil(1.20mm) 42
T4 59mil(1.50mm) 30
T5 98mil(2.50mm) 1
T6 118mil(3.00mm) 3
T7 138mil(3.50mm) 2
---------------------------------------------------------------------------
Totals 294
DRILL DRAWING
G1 Test Procedures (aVERB)
Required Equipment
Audio Precision System 2 with APWin software
100 Mhz oscilloscope connected to APS2 Analyzer Signal Monitor outputs (Ch. A and Ch. B)
Connection Mode
Use Audio Precision System 2 analog unbalanced (BNC) inputs/outputs.
Test Procedures for AlphaVerb
Amplitude response test
On PC:
-Load file: alfaverb_amplitude ( APWin File menu / Open / Test )
Test Connections:
-Output A of Audio Precision System Two --> LEFT input of the device under test.
-LEFT output of the device under test --> A input of Audio Precision System Two
-RIGHT output of the device under test --> B input of Audio Precision System Two
On the Alphaverb:
-Turn on the power switch.
-Set INPUT volume to maximum.
-Set OUTPUT volume to maximum.
-Set PROGRAM to DELAY.
-Set VARIATION to 1.
Start the sweep (F9) and control the results (Page3 – Graph) in the following conditions:
-MIX potentiometer turned to 0.
-MIX potentiometer turned to 10.
Audio Precision 05/22/02 12:55:43
alfaverb_amplitude.at2c
Color Line Style Thick Data Axi s
Cyan Solid 1Anlr.Level A Left
Green Solid 1Anlr.Level B Right
-10
+10
-7.5
-5
-2.5
+0
+2.5
+5
+7.5
d
B
V
-10
+10
-7.5
-5
-2.5
+0
+2.5
+5
+7.5
d
B
V
20 20k50 100 200 500 1k 2k 5k 10k
Hz
THD test
On PC:
-Load file: alfaverb_THD (APWin File menu / Open / Test )
Test Connections:
-Output A of Audio Precision System Two --> LEFT input of the device under test.
On the Alphaverb:
-Turn on the power switch.
-Set INPUT volume to maximum.
-Set OUTPUT volume to maximum.
-Set PROGRAM to DELAY.
-Set VARIATION to 1.
Start the sweep (F9) and control the results (Page3 – Graph) in the following conditions:
-LEFT output of the device under test --> A input of Audio Precision System Two / MIX
potentiometer turned to 10
-RIGHT output of the device under test --> B input of Audio Precision System Two / MIX
potentiometer turned to 10
Audio Precision 05/22/02 13:06:12
alfaverb_THD.at2c
Color Line Style Thick Data Axi s
Cyan Solid 2Anlr.THD+N Ratio Left
0.1
1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
%
20 6k50 100 200 500 1k 2k
Hz
S/N test
On PC:
-Load file: alfaverb_SN (APWin File menu / Open / Test )
Test Connections:
-Output A of Audio Precision System Two --> LEFT input of the device under test.
On the Alphaverb:
-Turn on the power switch.
-Set OUTPUT volume to maximum.
- With MIX command turned to 10, increase the INPUT level until the device`s outputs clip, and
after reduce the INPUT level itself until the outputs exit from clipping state.
-Set PROGRAM to DELAY.
-Set VARIATION to 1.
Start the sweep (F9) and control the results (Page3 – Graph) in the following conditions:
-LEFT output of the device under test --> A input of Audio Precision System Two / MIX
potentiometer turned to 10
-RIGHT output of the device under test --> B input of Audio Precision System Two / MIX
potentiometer turned to 10
Audio Precision 05/22/02 13:13:22
alfaverb_SN.at2c
Color Line Style Thick Data Axi s
Cyan Solid 2An l r . Am p l Left
-100
+20
-80
-60
-40
-20
+0
d
B
V
-1000.000 +0-900 -800 -700 -600 -500 -400 -300 -200 -100
dBV
Dynamics test
On PC:
-Load file: alfaverb_dyn (APWin File menu / Open / Test )
Test Connections:
-Output A of Audio Precision System Two --> LEFT input of the device under test.
On the Alphaverb:
-Turn on the power switch.
-Set INPUT volume to maximum.
-Set OUTPUT volume to maximum.
-Set PROGRAM to DELAY.
-Set VARIATION to 1.
Start the sweep (F9) and control the results (Page3 – Graph) in the following conditions:
-LEFT output of the device under test --> A input of Audio Precision System Two / MIX
potentiometer turned to 10
-RIGHT output of the device under test --> B input of Audio Precision System Two / MIX
potentiometer turned to 10
Audio Precision 05/22/02 13:16:14
alfaverb_dyn.at2c
Color Line Style Thick Data Axis
Cyan Solid 1Anlr.THD+N Ratio Left
Green Solid 1Anlr.Level A Right
-6
+12
-4
-2
+0
+2
+4
+6
+8
+10
d
B
u
-0
20
2
4
6
8
10
12
14
16
18
%
-26 -14-24 -22 -20 -18 -16
dBu
Stability test
On PC:
-Load file: alfaverb_stability (APWin File menu / Open / Test )
Test Connections:
-Output A of Audio Precision System Two --> LEFT input of the device under test.
-LEFT output of the device under test --> A input of Audio Precision System Two
-RIGHT output of the device under test --> B input of Audio Precision System Two
On the Alphaverb:
-Turn on the power switch.
-Set OUTPUT volume to maximum.
-Set INPUT volume to zero.
-Set PROGRAM to DELAY.
-Set MIX potentiometer to 0.
-Set VARIATION to 1.
Test:
Move the input level knob from 0 to maximum 3 times and control the output waveforms: NO
PERMANENT SINE WAVEFORMS should be visible. IF PERMANENT WAVEFORMS
WITH FREQUENCY > 20 kHz should become visible on whatever output channel, THE UNIT IS
TO BE INSPECTED.
aVERB-ALTO-230V-
歐洲
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M/F/E
27
EM54SH
MARK:
QDT
2/111
MH3154
!
hsffo
tmffwjoh
!
gmbnf
!
sfubsebou
28
ONDU27XX1121
MARK:
QDT
3/111
3/6ɫ+21n0n
wpmubhf
!
usbotgpsnfs
!
FJ.5
29
UQ5146
MARK:
QDT
2/111
341W061I{-BD:W0411nB
jotusvdujpo
2:
ONDRB.116
MARK:
2/111
bWFSC
eftjddbou
31
IFN.113
MARK:
QDT
2/111
21h
QF
!
cbh
32
OXDQ12XX1341+1461
MARK:
QDT
2/111
34+46dn
mpdlbcmf
!
cbh
33
OXDQ15
MARK:
QDT
2/111
6+8
dvtijpo
34
OJ12936
MARK:
QDT
2/111
1/6+ɫ4/4+ɫ9/4
!
bWFSC
35
OXDQ4:
MARK:
QDT
2/111
24+27nn
!
tfmg.qbtuf
!
gppu
!
qbe)TG.1
36
OMYN4:
MARK:
QDT
5/111
23/8+:/1+4/1u
mbcfm
37
ONMI:77[[
MARK:
2/111
bWFSC
!
DLT;5283
cpy
38
OC1258:
MARK:
QDT
2/111
bWFSC
Qbhf!3!pg!3
311306028
bWFSC.BMUP.341W.ለ߷
Nje!Op;
B.bWFSC.BMUP.341W.ለ߷
tuboebse!rvboujuz;
2/111
bWFSC
BNQ
Jufn!Op; tqfdjgz;
Item Name SpecificNO Material No
VojuRvbojuz Qt
qbqfs
!
pvuufs
!
dbtf
!
9ipmf
39
QPB113
MARK:
QDT
1/236
bWFSC
gjyfe
!
cpbse
3:
NBQJ75[[
MARK:
QDT
2/111
243+31+6
!
bWFSC
mbcfm
41
ONMN483[[
MARK:
5/111
bWFSC
mbcfm
42
OF16115
MARK:
5/111
BMUP
mbcfm
43
ONMI42
MARK:
3/111
NBEF
!
JO
!
Q/S/D/
Other manuals for Verb
1
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