Alto L-20 User Manual

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
3
2
1
U59A
4580M
R560
20K
C381
22P
C383
47u/25V
TR15
J112
R554
5K1
SW43A
PS-22E85L
SW44A
PS-22E85L
SW46A
PS-22E85L
MAIN MIX
SUB 1-2
2TK
R547
12K
R549
10K
R546
12K
R562
100K
R563
47K
R556
12K
R558
62K
LOGIC
R536
100K
R537
15K
R540
10K
+VCC
3
2
1
U58A
4580M
R538
220K
R539
15K
+VCC
R541
10K
C379
100N
D14
BAS316
R542
5K1
LD10
GR
LD11
RED
2
1
3
SW42A
PS-42E85L
PFL
SOLO
5
6
7
U57B
4580M
R531
30K
C374
22P
C377
47u/25V
AFL-L
R534
20K
5
4
6
SW42B
PS-42E85L
5
6
7
U58B
4580M
R532
30K
C375
22P
C378
47u/25V
AFL-R
R535
20K
8
7
9
SW42C
PS-42E85L
D15
BAS316
SOLO(PFL)
11
10
12
SW42D
PS-42E85L
R543
5K1
R544
20K
C380
2.2u/50V
SW-FET
PFL-IN-L
PFL-IN-L
PFL-IN-R
L-METER
TR16
J112
SW-FET
5
6
7
U59B
4580M
R561
20K
C382
22P
C384
47u/25V
TR17
J112
R555
5K1
SW43B
PS-22E85L
SW44B
PS-22E85L
SW46B
PS-22E85L
MAIN MIX
SUB 1-2
2TK
R551
12K
R553
10K
R550
12K
R564
100K
R565
47K
R557
12K
R559
62K
SW-FET
PFL-IN-R
R-METER
TR18
J112
SW-FET
TR19
J112
R545
100K
CTRL ROOM SOURCE
CTRMETER.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
RevisionModel No:
12-Jul-2003
BOW.
CONTROL ROOM STAGE
87of
ALTO L-12
VER030710
A3
8 9
14
U63C
LM339
1
6 7
U63B
LM339
1
6 7
U62B
LM339
8 9
14
U62C
LM339
8 9
14
U65C
LM339
1
6 7
U65B
LM339
1
6 7
U64B
LM339
8 9
14
U64C
LM339
LD24
GR
LD25
GR
LD26
GR
LD27
GR
LD28
GR
LD29
GR
LD30
GR
LD31
GR
R597
120R 1/4W
R600
120R
R601
470R
R602
330R
R603
470R
R604
330R
R605
470R
R606
510R
R607
620R
+VCC
R599
56R
-VCC
PGND
10 11
13
U63D
LM339
5
4
2
U63A
LM339
5
4
2
U62A
LM339
10 11
13
U62D
LM339
10 11
13
U65D
LM339
5
4
2
U65A
LM339
5
4
2
U64A
LM339
10 11
13
U64D
LM339
LD12
GR
LD13
GR
LD14
GR
LD15
GR
LD16
GR
LD17
GR
LD18
GR
LD19
GR
-VCC
LEFT METER
(-30) (-20) (-10) (-7) (-4) (-2) (0) (+2)
3
2
1
U68A
LM4580
R584
36K
R586
100K
C397
47u/25V
PGND
10 11
13
U67D
LM339
5
4
2
U67A
LM339
5
4
2
U66A
LM339
10 11
13
U66D
LM339
LD20
GR
LD21
GR
LD22
YEL
LD23
RED
8 9
14
U67C
LM339
1
6 7
U67B
LM339
1
6 7
U66B
LM339
8 9
14
U66C
LM339
LD32
GR
LD33
GR
LD34
YEL
LD35
RED
R608
1K3
R609
2K
R610
5K6
R611
8K2
TR13
HR
+VCC
D16A
DA204K
D16B
DA204K
TR14
HR
R598
120R 1/4W
R595
510R
R596
510R
R594
10K
PGND
5
6
7
U68B
LM458
R585
36K
R589
100K
C398
47u/25V
PGND
L-METER
R-METER
312
U66E
LM339
312
U65E
LM339
312
U67E
LM339
312
U64E
LM339
312
U63E
LM339
84
U68C
4580M
C399
100N
C400
100N
R592
47R
R593
47R
C401
47u/25V
C402
47u/25V
+VCC
-VCC
PGND
LD37
RED
LD36
GR
R583
4K7
R582
2K
PGND
PGND
PH PWR
(+4) (+7) (+10) (+18)
PWR ON
PHANTOM
+VCC
312
U62E
LM339
R591
10K
R588
10K
PGNDPGND
84
U59C
4580M
84
U58C
4580M
84
U57C
4580M
84
U60C
4580M
C403
100N
C404
100N
C405
100N
C406
100N
C407
100N
C408
100N
C409
100N
C410
100N
+VCC
-VCC
3
2
1
U57A
4580M
R530
10K
C373
22P
C376
47u/25V
CTRL-R-L
CTRL-R-R
LOGIC
SW-FET
SW-FET
SW-FET
SW-FET
SW-FET
PFL-IN-R
PFL-IN-L
PFL-IN-R
PFL-IN-L
R533
20K
MAIN-L-2
MAIN-R-2
SUB1-L
SUB2-R
2TK TO CR-R
2TK TO CR-L
SOLO(PFL)
AFL-L
AFL-R
ACTIVE
**SW23:SOLO MODE
CTR VU-METER
SW45A
PS-22E85L
SUB 3-4
R548
12K
SUB3-L
SW45B
PS-22E85L
SUB 3-4
R552
12K
SUB4-R
R566
5K6
3
2
1
U60A
NJM4580M
VR68B
W50K
R568
20K
C385
22P
C393
47u/25V
R569
10K
R570
5K6
5
6
7
U60B
NJM4580M
VR68A
W50K
R572
20K
C386
22P
C394
47u/25V
R573
10K
ROOM
CONTROL
PHONES
PHONE-L
PHONE-R
R574
5K6
3
2
1
U61A
NJM4580M
VR67B
W50K
R576
20K
C387
22P
C395
47u/25V
R577
10K
R578
5K6
5
6
7
U61B
NJM4580M
VR67A
W50K
R580
20K
C388
22P
C396
47u/25V
R581
10K
CTRL/L
CTRL/R
84
U61C
4580M
C411
100N
C412
100N
D30
4148
D31
4148
3
2
1
U79A
4580M
R743
10K
C472
22P
R741
10K
5
6
7
U79B
4580M
R744
10K
C473
22P
C475
47u/25V
R742
10K
C470
47u/25V
C471
47u/25V
C474
47u/25V
D32
4148
D33
4148
84
U4C
4580M
C476
100N
C478
100N
+VCC
-VCC
R746
47R
R745
47R
84
U5C
LM393
C477
100N
C479
47u/25V
C480
47u/25V
C481
100N
84
U9C
LM393
C484
100N
84
U19C
LM393
84
U20C
4580M
C483
100N
C482
100N
84
U18C
LM393
C485
100N
C486
47u/25V
C487
47u/25V
PGND
+RVCC
-RVCC
84
U79C
4580M
C51
100N
C52
100N

Alto L-20 Specifications

General

Brand	Alto
Model	L-20
Category	Music Mixer
Language	English