Alto Dragonfly PM-12 Service Manual page 27

1 2
C241
R378
20K 22P
R380
C243
22K
47u/25V
C239
2
47u/25V 1
2TK-IN-L 3
2TK-IN-L
R384
20K R382
U33A
D C237
R673
R5 10K
4580M
100P
15K
2TK TO MIX
C242
R379
22P
20K
R381
C244
22K
C240 47u/25V
6
47u/25V
7
2TK-IN-R 5
2TK-IN-R
20K U33B
R383
R674
C238 R6 4580M
10K
100P
15K
C245
SUB1
22P
R387
20K R388
2
5K1
SUB1
1
3
C247
U34A
C
47u/25V
4580M
VR66A
10KD
C249
SUB2
22P
R394
20K R395
2
5K1
SUB2
1
3
C251
U35A
47u/25V
4580M
VR53A
10KD
C253
22P
SUB3
R401
20K R402
2
5K1
SUB3
1
3
C255
U36A
47u/25V
4580M
VR54A
10KD
B C257
SUB4
22P
R408
20K R409
2
5K1
SUB4
1
3
C259
U37A
47u/25V
4580M
VR55A
10KD
U33C U34C U35C U36C U37C U38C U39C
4580M 4580M 4580M 4580M 4580M 4580M 4580M
U45C U46C U47C U48C U49C U50C U51C
4580M 4580M 4580M 4580M 4580M 4580M 4580M
C325 C327 C329 C331 C333 C335 C337 C339 C341 C343 C345 C347
A 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n
+VCC
-VCC
C326 C328 C330 C332 C334 C336 C338 C340 C342 C344 C346 C348
100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n
U33 U34 U35 U36 U37 U38 U39 U40 U41 U42 U43 U44 U45 U46 U47 U48 U49 U50 U51 U52 U53 U54 U55 U56 U1
1 2
3 4 5
MAIN MIX
LEFT
2TK TO CR-L
MAIN-RTN-L
R414
VR56A
SW36A
10KD
PS-22E85L
LEFT-BUS
18K
MAIN OUT
2TK TO CR-R
(BALANCED)
MAIN MIX
SW36B
PS-22E85L
RIGHT
RIGHT-BUS
R385
MAIN-RTN-R
18K
R415
VR56B
10KD
SW37A
R391
PS-22E85L
18K
LEFT-BUS
C246
SW48A
22P R392
PS-22E85L
18K
R389
18K
RIGHT-BUS
6
SUB1-L
7
SUB1-L
5
C248
R390
47u/25V
U34B 10K
4580M
SW38A
R398
PS-22E85L
18K
LEFT-BUS
C250
SW49A
22P R399
PS-22E85L
18K
R396
18K
RIGHT-BUS
6
SUB2-R
7
SUB2-R
5
C252
R397
47u/25V
U35B 10K
4580M
SW39A
R405
PS-22E85L
18K
LEFT-BUS
C254
SW50A
22P R406
PS-22E85L
18K
R403
18K RIGHT-BUS
6
7 SUB3-L
SUB3-L
5
C256
R404
47u/25V
U36B 10K
4580M
SW40A
R412
PS-22E85L
18K
LEFT-BUS
C258
SW51A
22P R413
PS-22E85L
18K
R410
18K RIGHT-BUS
6
7 SUB4-R
SUB4-R
5
C260
R411
47u/25V
U37B 10K
4580M
U40C U41C U42C U43C U44C
4580M 4580M 4580M 4580M 4580M
U1C
U52C U53C U54C U55C U56C
4580M
4580M 4580M 4580M 4580M 4580M
C349 C351 C353 C355 C357 C359 C361 C363 C365 C367 C369 C371 C11
100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n
C350 C352 C354 C356 C358 C360 C362 C364 C366 C368 C370 C372 C12
100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n
3 4 5
6 7
C261
C265
22P
MAIN-L-3
MAIN-L-3
C263
47u/25V
R416 R424
22P
LEFT
18K 10K
R422
5K1 R418
5K1
2 5K1
1 6
3 7 MAIN-L-2
MAIN-L-2
5
C266 R426
LEFT-BUS
U38B
U38A 47u/25V
10K
4580M
4580M
C262
22P C267
MAIN-R-3
MAIN-R-3
C264
47u/25V
R417
R425
22P
18K RIGHT
10K
R423
R419
5K1
5K1
2 5K1
1 6
3 7 MAIN-R-2
MAIN-R-2
5
U39B
C268
R427
U39A 4580M
47u/25V
10K
4580M
RIGHT-BUS
EQ-VRR-A
63HZ-R 250HZ-R 1KHZ-R 4KHZ-R 16KHZ-R
VR57B VR59B VR61B VR63B VR65B
W100K W100K W100K W100K W100K
EQ-VRR-B
125HZ-R 500HZ-R 2KHZ-R 8KHZ-R
VR58B VR60B VR62B VR64B
W100K W100K W100K W100K
EQ-VRR-C
EQ-VRL-A
63HZ-L 250HZ-L 1KHZ-L 4KHZ-L 16KHZ-L
VR57A VR59A VR61A VR63A VR65A
W100K W100K W100K W100K W100K
EQ-VRL-B
125HZ-L 500HZ-L 2KHZ-L 8KHZ-L
VR58A VR60A VR62A VR64A
EQ-OPL-A
W100K W100K W100K W100K
EQ-VRL-C
C289
2N2
R458
38K3
U48A
C290
R459
2
EQ-OPL-B R461
19K1 1
8KHZ-L
2N2
3 10K
R460
4580M
2K43
C291
22N
R462
15K
C292 U49A
R463
2
R465
1
7K5
2KHZ-L
22N
3
10K
4580M
R464
976R
C293
22N
R466
60K4
U50A
C294
R467
2
R469
30K1 1
500HZ-L
22N
3 10K
R468
4580M
3K92
C295
0.22uF
R470
24K3
C296
0.22uF
R473
R471
2
10K
12K1 1
125HZ-L
3
U51A
R472
4580M
1K54
26
6 7
8 9
C269
R436
22P
10K EQ-VRL-B
R428 C5
20K 22P
C6
C273
R8 47u/25V R430
2 22P
10K
R7 10K
1 2
3 1
10K
2 3
R434
U40A 1
10K
3
4580M U41A
R432
4580M
49K9
U1A
4580M
R438
C271
10K
22P
6
EQ-VRL-A EQ-OPL-A
7
5
U41B
4580M
R437
10K EQ-VRR-B
C270 C9
22P 22P
C10
47u/25V R431 C274
R429 R10
22P
R9 10K
20K 10K
2
1
10K
R435
6 6 3
7 7
10K
5 5 U42A
R433
4580M
49K9
U40B U1B
4580M 4580M
R439
C272
10K
22P
6
EQ-VRR-A EQ-OPR-A
7
5
U42B
4580M
9 BAND EQ
C297
2N2
R474
19K6 EQ-OPR-B
C298 U52A
R475
2
R477
1
9K76
16KHZ-L
2N2
3 10K
R476 4580M
1K18 C307
2N2
R494
38K3
C299
U53A
C308
R495
2
2N2
19K1
R478
2N2 3
76K8
R496
4580M
C300 U48B 2K43
R479
6
R481
7
38K3
4KHZ-L
2N2
5 10K
R480 4580M
4K75
C309
22N
R498
C301 C310
15K
22N
U54A
R499
22N 2
R482
7K5
30K1 3
U49B
C302 R500 4580M
R483
976R
6
R485
15K 7
1KHZ-L
22N 5
10K
R484
4580M
1K96
C311
22N
C303
0.22uF R502
60K4
C312
22N
U55A
R486 R503
2
12K1 30K1
C304
3
0.22uF U50B
R487
R504
6 4580M
R489
3K92
6K04 7
250HZ-L
5
10K
4580M
R488
787R
C313
0.22uF
C305
R506
C314
0.22uF
24K3
R490
0.22uF
R507
48K7 2
12K1
U51B
C306 3
R491
6
R493
R508
24K3 7
63HZ-L
0.22uF 5 1K54
10K
R492 4580M
3K01
8 9
10 11 12
EQ & MAIN
MAIN-INS-L
C275
22P
SW41A
R440 C279
PS-22E85L
49K9 22P
EQ-VRL-C
2 R448
49K9
1
3 R452
C287
10K C283
U43A 6
22P 47u/25V
4580M 7
R442
5 U45B
10K
4580M
R454
R444 R450 R456
10K
10K
10K 2 10K
1
3
C277
R446
6 22P C281
10K
7 2 22P
U47A
5 1 4580M
3
U43B
4580M
U45A
EQ-OPL-B
4580M
SW41B
MAIN-INS-R
C276 PS-22E85L
22P
EQ-VRR-C
R441 C280
49K9 22P
2 R449
49K9
1
3 R453
C288
10K C284
U44A 6
22P 47u/25V
7
4580M
R443
5
U46B
10K
4580M
R455
R445 R451 R457
10K
10K 10K
10K 6
7
5
C278
R447
6 22P C282
10K
7 2 22P U52B
5 1 4580M
3
U44B
4580M
U46A
EQ-OPR-B
4580M
C315
2N2
R510
19K6
U47B
C316
R511
6
EQ-OPR-A R513
9K76 7
16KHZ-R
2N2 5
10K
R512
4580M
1K18
C317
2N2
R514
76K8
C318 U53B
R497 R515
1 6
8KHZ-R R517
7
10K 38K3
4KHZ-R
2N2
5
10K
R516 4580M
4K75
C319
22N
R518
30K1
C320 U54B
R519
6
R501 R521
1 7
15K
2KHZ-R 1KHZ-R
22N
10K 5 10K
R520 4580M
1K96
C321
0.22uF
R522
12K1
C322
0.22uF
R523
6
R525
6K04 7
R505 250HZ-R
1 5 10K
500HZ-R
10K
U55B
R524
4580M
787R
C323
0.22uF
R526
C324 48K7
0.22uF
U56B
R527
6
R529
24K3 7
63HZ-R
5
10K
R509
1
125HZ-R
R528 4580M
10K
U56A
3K01
4580M
Titel
MAIN INPUT STAGE
PCB# PM12MN2.PCB
Size Model No: Revision
A1 ALTO PM12
VER031030
Date: 8-Mar-2005 Sheet 2 of 7
File: PM12MN2.S02 Drawn By: Bao.
10 11 12
D
C
B
A