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OTHER.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
Revision
Model No:
1-Oct-2003
BOW.
MAIN INPUT STAGE
8
4
of
ALTO LM12
VER030710
A3
PCB# L12PU2.PCB
3
2
1
U34A
4580M
R387
20K
C245
22P
SUB1
C247
47u/25V
5
6
7
U34B
4580M
R389
18K
C246
22P
VR66
10KD
SUB1
C248
47u/25V
R390
10K
R388
5K1
SUB1-L
SUB1-L
R392
20K
RIGHT-BUS
LEFT-BUS
R391
20K
R386
510R
3
2
1
U35A
4580M
R394
20K
C249
22P
SUB2
C251
47u/25V
5
6
7
U35B
4580M
R396
18K
C250
22P
SUB2
C252
47u/25V
R397
10K
SUB2-R
SUB2-R
R399
20K
RIGHT-BUS
LEFT-BUS
R398
20K
R393
510R
3
2
1
U36A
4580M
R401
20K
C253
22P
SUB3
C255
47u/25V
5
6
7
U36B
4580M
R403
18K
C254
22P
SUB3
C256
47u/25V
R404
10K
SUB3-L
SUB3-L
R406
20K
RIGHT-BUS
LEFT-BUS
R405
20K
R400
510R
3
2
1
U37A
4580M
R408
20K
C257
22P
SUB4
C259
47u/25V
5
6
7
U37B
4580M
R410
18K
C258
22P
SUB4
C260
47u/25V
R411
10K
SUB4-R
R413
20K
RIGHT-BUS
LEFT-BUS
R412
20K
R407
510R
SUB4-R
SW37A
PS-22E85L
SW48A
PS-22E85L
SW38A
PS-22E85L
SW49A
PS-22E85L
SW39A
PS-22E85L
SW50A
PS-22E85L
SW40A
PS-22E85L
SW51A
PS-22E85L
3
2
1
U40A
4580M
R428
20K
C269
22P
LEFT-BUS
RIGHT-BUS
C285
47u/25V
5
6
7
U41B
BA1458
3
2
1
U41A
BA1458
3
2
1
U45A
BA1458
5
6
7
U45B
BA1458
3
2
1
U47A
BA1458
R430
10K
C273
22P
R436
10K
R434
10K
R432
49K9
C271
22P
R446
10K
R450
10K
C281
22P
R452
10K
R448
49K9
C279
22P
R454
10K
R456
10K
C283
22P
C287
47u/25V
63HZ-L
250HZ-L
1KHZ-L
4KHZ-L
125HZ-L
500HZ-L
2KHZ-L
8KHZ-L
16KHZ-L
EQ-VRL-A
EQ-OPL-A
5
6
7
U43B
BA1458
3
2
1
U43A
BA1458
R438
10K
R444
10K
C277
22P
R442
10K
R440
49K9
C275
22P
EQ-VRL-B
EQ-OPL-B
EQ-VRL-C
EQ-VRL-A
EQ-VRL-B
EQ-VRL-C
63HZ-L
250HZ-L
1KHZ-L
4KHZ-L
16KHZ-L
3
2
1
U52A
BA1458
R477
10K
R474
19K6
R475
9K76
R476
1K18
C298
2N2
C297
2N2
3
2
1
U53A
BA1458
R481
10K
R478
76K8
R479
38K3
R480
4K75
C300
2N2
C299
2N2
3
2
1
U54A
BA1458
R485
10K
R482
30K1
R483
15K
R484
1K96
C302
22N
C301
22N
3
2
1
U55A
BA1458
R489
10K
R486
12K1
R487
6K04
R488
787R
C304
0.22uF
C303
0.22uF
3
2
1
U56A
BA1458
R493
10K
R490
48K7
R491
24K3
R492
3K01
C306
0.22uF
C305
0.22uF
125HZ-L
500HZ-L
2KHZ-L
8KHZ-L
3
2
1
U48A
BA1458
R461
10K
R458
38K3
R459
19K1
R460
2K43
C290
2N2
C289
2N2
3
2
1
U49A
BA1458
R465
10K
R462
15K
R463
7K5
R464
976R
C292
22N
C291
22N
3
2
1
U50A
BA1458
R469
10K
R466
60K4
R467
30K1
R468
3K92
C294
22N
C293
22N
3
2
1
U51A
BA1458
R473
10K
R470
24K3
R471
12K1
R472
1K54
C296
0.22uF
C295
0.22uF
EQ-OPL-B
MAIN-INS-L
5
6
7
U40B
4580M
R429
20K
C270
22P
C286
47u/25V
5
6
7
U42B
BA1458
3
2
1
U42A
BA1458
3
2
1
U46A
BA1458
5
6
7
U46B
BA1458
5
6
7
U47B
BA1458
R431
10K
C274
22P
R437
10K
R435
10K
R433
49K9
C272
22P
R447
10K
R451
10K
C282
22P
R453
10K
R449
49K9
C280
22P
R455
10K
R457
10K
C284
22P
C288
47u/25V
EQ-VRR-A
EQ-OPR-A
5
6
7
U44B
BA1458
3
2
1
U44A
BA1458
R439
10K
R445
10K
C278
22P
R443
10K
R441
49K9
C276
22P
EQ-VRR-B
EQ-OPR-B
EQ-VRR-C
MAIN-INS-R
63HZ-R
250HZ-R
1KHZ-R
4KHZ-R
125HZ-R
500HZ-R
2KHZ-R
8KHZ-R
16KHZ-R
EQ-VRR-A
EQ-VRR-B
EQ-VRR-C
63HZ-R
250HZ-R
1KHZ-R
4KHZ-R
16KHZ-R
5
6
7
U52B
BA1458
R513
10K
R510
19K6
R511
9K76
R512
1K18
C316
2N2
C315
2N2
5
6
7
U53B
BA1458
R517
10K
R514
76K8
R515
38K3
R516
4K75
C318
2N2
C317
2N2
5
6
7
U54B
BA1458
R521
10K
R518
30K1
R519
15K
R520
1K96
C320
22N
C319
22N
5
6
7
U55B
BA1458
R525
10K
R522
12K1
R523
6K04
R524
787R
C322
0.22uF
C321
0.22uF
5
6
7
U56B
BA1458
R529
10K
R526
48K7
R527
24K3
R528
3K01
C324
0.22uF
C323
0.22uF
125HZ-R
500HZ-R
2KHZ-R
8KHZ-R
5
6
7
U48B
BA1458
R497
10K
R494
38K3
R495
19K1
R496
2K43
C308
2N2
C307
2N2
5
6
7
U49B
BA1458
R501
10K
R498
15K
R499
7K5
R500
976R
C310
22N
C309
22N
5
6
7
U50B
BA1458
R505
10K
R502
60K4
R503
30K1
R504
3K92
C312
22N
C311
22N
5
6
7
U51B
BA1458
R509
10K
R506
24K3
R507
12K1
R508
1K54
C314
0.22uF
C313
0.22uF
EQ-OPR-B
VR57A
W100K
VR58A
W100K
VR60A
W100K
VR59A
W100K
VR61A
W100K
VR62A
W100K
VR64A
W100K
VR63A
W100K
VR65A
W100K
VR57B
W100K
VR58B
W100K
VR60B
W100K
VR59B
W100K
VR61B
W100K
VR62B
W100K
VR64B
W100K
VR63B
W100K
VR65B
W100K
EQ-OPL-A
EQ-OPR-A
9 BAND EQ
SW41A
PS-22E85L
SW41B
PS-22E85L
VR53
10KD
R395
5K1
VR54
10KD
R402
5K1
VR55
10KD
R409
5K1
8
4
U33C
4580M
8
4
U34C
4580M
C327
100N
C328
100N
C325
100N
C326
100N
8
4
U35C
4580M
8
4
U36C
4580M
8
4
U37C
4580M
8
4
U38C
4580M
8
4
U39C
4580M
8
4
U40C
4580M
8
4
U41C
4580M
8
4
U42C
4580M
8
4
U43C
4580M
8
4
U44C
4580M
8
4
U45C
4580M
8
4
U46C
4580M
8
4
U47C
4580M
8
4
U48C
4580M
8
4
U49C
4580M
8
4
U50C
4580M
8
4
U51C
4580M
8
4
U52C
4580M
8
4
U53C
4580M
8
4
U54C
4580M
8
4
U55C
4580M
8
4
U56C
4580M
C331
100N
C332
100N
C329
100N
C330
100N
C335
100N
C336
100N
C333
100N
C334
100N
C339
100N
C340
100N
C337
100N
C338
100N
C343
100N
C344
100N
C341
100N
C342
100N
C347
100N
C348
100N
C345
100N
C346
100N
C351
100N
C352
100N
C349
100N
C350
100N
C355
100N
C356
100N
C353
100N
C354
100N
C359
100N
C360
100N
C357
100N
C358
100N
C363
100N
C364
100N
C361
100N
C362
100N
C367
100N
C368
100N
C365
100N
C366
100N
C371
100N
C372
100N
C369
100N
C370
100N
+VCC
-VCC
3
2
1
U38A
4580M
3
2
1
U39A
4580M
R416
18K
C261
22P
R414
5K1
VR56A
10KD
MAIN MIX
VR56B
10KD
R417
18K
C262
22P
R415
5K1
C265
47u/25V
C267
47u/25V
R424
10K
R425
10K
MAIN MIX
LEFT
RIGHT
MAIN-L-3
MAIN-R-3
(BALANCED)
5
6
7
U38B
4580M
C263
22P
C266
47u/25V
R422
5K1
R426
10K
R418
5K1
MAIN OUT
LEFT
RIGHT
MAIN-L-2
5
6
7
U39B
4580M
C264
22P
C268
47u/25V
R423
5K1
R427
10K
R419
5K1
MAIN-R-2
MAIN-R-3
MAIN-R-2
MAIN-L-2
MAIN-L-3
MAIN-L
MAIN-R
R420
22K
R421
22K
MONO-LEVEL
C240
47u/25V
R379
20K
5
6
7
U33B
4580M
R381
22K
C242
22P
C244
47u/25V
R383
10K
R385
18K
C239
47u/25V
R378
20K
3
2
1
U33A
4580M
R380
22K
C241
22P
C243
47u/25V
R382
10K
R384
18K
LEFT-BUS
RIGHT-BUS
2TK TO MIX
C237
100P
C238
100P
2TKIN-L
2TKIN-R
SW36A
PS-22E85L
SW36B
PS-22E85L
2TKIN-L
2TKIN-R
2TK TO CR-L
2TK TO CR-R
R673
20K
R674
20K
R728
15K
R727
15K
3
2
1
U78A
4580M
R731
10K
C468
22P
R729
10K
5
6
7
U78B
4580M
R732
10K
C469
22P
R730
10K
8
4
U78C
4580M
C49
100N
C50
100N
U45 U46 U47 U48 U49 U50 U51 U52 U53 U54 U55 U56 U57 U58 U59 U60 U61 U62 U63 U64 U65 U66 U67 U68 U69
Summary of Contents for L-12
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