1
2
3
4
5
6
7
8
A
B
C
D
8
7
6
5
4
3
2
1
D
C
B
A
L12DSP.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
Revision
Model No:
18-Jun-2003
BOW.
UDASP IN/OUT SECTION
8
8 of
ALTO L-12
VER030424
A3
C433
22P
C441
1.5nF 2.5%
C436
4.7uF
5
6
7
U72B
4580M
R630
10K
R624
68R
R626
3K3
R628
10K
R655
10K
3
2
1
U72A
4580M
R632
10K
C434
22P
C442
1.5nF 2.5%
C438
4.7uF
5
6
7
U73B
4580M
R631
10K
R625
68R
R627
3K3
R629
10K
R656
10K
3
2
1
U73A
4580M
R633
10K
3
5
7
RL1B
RY-5W-K
4
6
8
RL1C
RY-5W-K
EFXRTN-L
EFXRTN-R
C439
4.7uF
5
6
7
U74B
4580M
3
2
1
U74A
4580M
C440
1.5nF 2.5%
R636
10K
R637
10K
C435
22P
R638
10K
C432
22P
R635
2K2
R634
10K
EFXRTN-L
EFXRTN-R
DFX SEND
(MUTE)
(MUTE)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CN6
HEADER 8X2
1
2
3
4
COM
EN2
SDB161PVB15FS
1
2
3
4
COM
EN1
SDB161PVB15FS
1
2
3
4
5
6
7
8
AR1
680R*4
1
2
3
4
5
6
7
8
AR2
680R*4
DGND
DGND
+5VD
GND
+5VD
CLK
4
J
2
S
5
R
1
Q
6
Q
7
K
3
U76A
74HC109
+5VD
R640
10K
D20
BAS316
1
2
U77A
74HC14
C423
1uF
DGND
+5VD
R645
10K
D23
BAS316
C424
1uF
DGND
R647
220R
R646
220R
SW47
PS-22E85NL
DGND
(MUTE)
R642
10K
R644
10K
TR20
BR
DGND
DGND
1
2
RL1A
RY-5W-K
+5VD
C437
100N
D21
4148
R650
220R
R651
7K5
LD38
RED
FOOTSW
8
4
U72C
4580M
8
4
U74C
4580M
8
4
U73C
4580M
C425
100N
C426
100N
C427
100N
C428
100N
+VCC
-VCC
3
4
U77B
74HC14
5
6
U77C
74HC14
8
9
U77D
74HC14
12
13
U77F
74HC14
14
7
U77G
74HC14
DGND
CLK
12
J
14
S
11
R
15
Q
10
Q
9
K
13
U76B
74HC109
DGND
16
8
U76C
74HC109
C430
100N
C429
100N
+5VD
DGND
C443
10uF
UDASP IN/OUT SECTION
JP1
PGND
1
2
4
8
1
2
4
8
DGND
3
2
1
U75A
LM393
5
6
7
U75B
LM393
R648
4K7
+VCC
R654
1K
C431
100N
R652
1M
R653
2M2
R649
820K
D22A
RB400D
PEAK(FLICKER)
MUTE(GLOW)
PRESET
VARIATION
8
4
U75C
LM393
TR21
BR
DGND
R641
10K
R643
10K
DGND
OUT
3
RS
4
TG
2
TH
6
CTR
5
DS
7
U71A
NE555
C421
100N
DGND
+5VD
R639
47K
C444
10uF
DGND
8
1
U71B
NE555
C445
33P
C422
33P
10K CHANGE TO 3K3
L12DSP
DFX SEND
D24
DA202K
3
2
1
U69A
4580M
R614
36K
C413
22P
C417
47u/25V
5
6
7
U69B
4580M
R620
36K
C415
22P
EFFECTS OUT
C419
47u/25V
R616
6K2
R622
510R
3
2
1
U70A
4580M
R615
36K
C414
22P
C418
47u/25V
5
6
7
U70B
4580M
R621
36K
C416
22P
C420
47u/25V
R617
6K2
R623
510R
R612
36K
R613
36K
EFXRTN-L
EFXRTN-R
DFXOUT-L
DFXOUT-R
VR73A
W50K
VR73B
W50K
8
4
U69C
4580M
8
4
U70C
4580M
C446
100N
C447
100N
C448
100N
C449
100N
C450
100N
C451
100N
C452
100N
C453
100N
Summary of Contents for L-12
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