Alto VERB II, Service Manual, Page: 7 / 17

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A B C D
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1
D C B A
HB
0254~1.S
C
H
File: Date:
Draw
n B
y
:
S
heet
Rev
ision
23-Jun-2007
YON
G
QIAN
YAO
2
1o
f
a
VER
B II
V
E
R
070615
C24 22P
C30
1.5nF
C7
4.7uF
3 2
1
U3A
T
L074CD
R10 10K
R1 100R
R3
10K
R8
10K
R9 10K
AGND
AGND
5 6
7
U3B
T
L074CD
R14
10K
C28 22P
C32
1.5nF
C23
4.7uF
12 13
14
U3D
T
L074CD
R25 10K
R2 100R
R6 10K
R18
10K
R24
10K
AGND
AGND
10 9
8
U3C
T
L074CD
R27
10K
10
9
8
U2C
T
L074CD
AGND
AGND
12 13
14
U2D
T
L074CD
C31 1.5nF
R22 10K
R21 10K
C29 22P
R26 10K
C27 22P R34 10K
R16 10K
IN
PU
T
R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CN2
HEADER 8
X
2
1 3 4 6
COM
EN2
288S
0366
1 3 4 6
COM
EN1
288S
0366
1 2
3 4
5 6
7 8
AR1 680R*4
1 2
3 4
5 6
7 8
AR2 680R*4
DGND
DGND
+5V
SGND
+5V
CLK
4
J
2
S
5
R
1
Q
6
Q
7
K
3
U5A 74HC109
+5V
R32 10K
A
2
K
1
D5 RLS
4148
1
2
U6A 74HC14
C41 1uF
DGND
+5V
R33 10K
A
2
K
1
D6
RLS
4148
C42 1uF
DGND
R42
220R
(M
U
T
E
)
R29 10K
R28 10K
TR1
BR
DGND
DGND
+5V
R41 220R
R40 7K
5
LD1 RED
3
4
U6B 74HC14
5
6
U6C 74HC14
8
9
U6D
74HC14
12
13
U6F
74HC14
14 7
U6G
74HC14
DGND
CLK
12
J
14
S
11
R
15
Q
10
Q
9
K
13
U5B 74HC109
DGND
16 8
U5C
74HC109
C38
100nF
C37
100nF
+5V
DGND
C40 10uF
JP
1
AGND2
1 2 4 8
1 2 4 8
DGND
3 2
1
U4A
LM393
5 6
7
U4B LM393
R36 4K
7
+5VA
R37 1K
C36 100nF
R38 1M
R39 2M2
R43 820K
AGND
D1 RLS
4148
PEAK(FL
ICKER)
MUTE(GLOW
)
PRESET
VARIATION
AGND
AGND
TR2 BR
DGND
R30
10K
R31 10K
DGND
OUT
3
RS
4
TG
2
TH
6
CTR
5
DS
7
U8A NE
555
C35
100nF
DGND
+5V
R35 47K
C39 10uF
DGND
8 1
U8B
NE
555
C34 33P
AGND AGND
C33 33P
9
8
6
U7A 4066
11
10
12
U7B 4066
4
3
5
U7C 4066
1
2
13
U7D 4066
14 7
U7E
4066
MUTE1 MUTE2
AGND
R47 100R
C43 47uF
/25V
R46 470R
R44 470R R45 470R
MUTE1 MUTE2
R17 10K
IN
PU
T
L
OUTPUTR OUTPUTL
TPVERBI
O.
SCH
DGND
D4 RLS
4148
D7 RLS
4148
8 4
U4C
LM393
-5V
+5VA
C20
100nF
C21
100nF
AGND
1 2 3 4 5 6
PJ5 MI
C6
P
IN
Tex
t
AlphaverbII (1/2)
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