C407
33P/250V
C402
1N
C405
33P/250V
C425
470pF
R402
22K
R403
100
R412
100
R404
100
R413
27K
R405
27K
R414
100
R406
100
Q413
2SA1837
Q410
2SA1360
Q409
2SA1015
Q405
2SA1015
Q407
2SA970
Q406
2SA970
Q401
2SA970
Q411
2SA3423
Q412
2SC1815
Q408
2SC1815
Q404
2SC2240
Q403
2SC2240
Q402
2SC2240
R408
33
R420
33
R459
10/2W FS
R415
10K
R423
82 FP 1/2W
R421
39K
R417
21/1/4W 1%
R419
1K2 3W 1%
R407
82
R416
22K
R428
300
R411
10K
R410
22K
R426
100K
R424
100K
R409
82 FP 1/2W
D403
1N4148
D404
1N4148
D406
1N4148
D405
1N4148
C408
330P
Q414
2SC4793
R430
3R3/0.5W FP
R432
330/0.5W FP
R434
4K7/3W FP
R438
3R3/0.5W FP
R441
330/0.5W FP
R444
4K7/3W FP
R437
18
R429
18
R431
4R7/FS
R439
4R7/FS
R445
1K2 1%
R446
1K 1%
Q415
KSC2690
Q417
2SC4793
Q424
2SC5200
Q422
2SC5200
Q418
2SA1837
R457
0.05/5W
R456
0.05/5W
R448
15
R449
15
R442
10K
R433
10K
Q421
2SA1943
Q423
2SA1943
C418
0.1uF
+74V
-74V
+72V
-72V
R401
470
AGND
AGND
AGND
GND
GND
C403
10uF/50V
C404
10uF/50V
C411
100UF/25V
C412
100u/25V
R435
10K
R443
10K
C416
0.1uF
C417
0.1uF
C409
0.1uF
C410
0.1u/80V
AGND
AGND
Q426
2SA970
Q425
C2240
R464
6K8
C421
4u7/50V
R463
22K
R461
1K
R462
56K
C420
22N
D409
BV21
Q427
2SA1943
Q428
2SC5200
SPGND
R422
1K2 3W 1%
GND
2
3
1
IC402
TL431
2
3
1
IC
401
TL431
1
VR401
200
R447
220
Q416
2SA1015
C422
10uF/80V
C423
10uF/80V
GND
GND
R476
220K
R477
82
C415
10uF/50V
R425
39K
R480
2.2
R482
2.2
R484
2.2
R486
2.2
Q419
2SA1943
Q420
2SC5200
R481
2.2
R483
2.2
R485
2.2
R487
2.2
C426
470pF R451
22
GND
R450
220K
C419
10uF/50V
Q437
2SC4793
R488
1
R489
1
Q438
2SA1837
R491
1
R490
1
C428
0.1uF
IC403A
TL082D
C427
1uF
R452
1M
R453
680
AGND
R495
4K7/3W FP
R496
4K7/3W FP
C429
1uF
R454
1M
AGND
AGND
R418
100
L401
100uH
RL402A
RL402B
RL401B
RL401A
R499
3R3/1W FP
L402
1uH
C440
22N
PRGND
R471
56K
C431
330u/16V
C432
0.22u
R469
56K
C433
47u/50V
GND
1
2
3
4
5
6
7
8
IC404*
uPC1237HA
+V24R
R468
2K2
R467
10K
PRGND
Q450
2SA1015
R475
200
R474
3K3
R470
3K3
R473
100K
R472
N.I.
Q452
2SC1815
Q453
2SC1815
D414
1N4148
D415
1N4148
R479
10K
R478
10K
PRGND
PRGND
SPGND
1
2
3
4
5
6
7
8
9
10
CZ402
CON10
AC DET
PROTECT
RT401
T0=80 degree C
PRGND
SPK A
SPK B
B401
THERMAL BREAKER
R493
0
R492
0
D412
1N4148
D413
1N4148
R494
N.I.
1
2
CZ401
CON2
AGND
IC403B
TL082D
AGND
GND
-74V +74V
R CHANNEL AMP
+72V
-72V
PRGND
Q454
2SA1015
R466
100K
R498
10K
R497
100K
PRGND
PRGND
R427
20K
D401
18V
D402
18V
C401
0.1uF
C406
0.1uF
R455
10K/0.6W
R458
10K/0.6W
+72V
-72V
Q429
2SC2878
AGND
Q430
2SC2240
R41
1K
R42
1K2
Q431
2SC3423
Q432
2SA1360
R43
10
R44
10
C414
0.1uF
+V24R
1
P401
PCBNUT
1
P402
PCBNUT
1
P403
PCBNUT
D423
1N4148
D422
3.6V
D424
3.6V
D425
1N4148
D417
1N4148
D418
1N4148
D421
1N4148
D420
1N4148
D416
LED
D419
LED
D427
12V
D426
1N4148
C434
2.2uF/50V
C435
2.2uF/50V
R45
200K
GND
D411
1N4148
R47
200K
R46
4.7K
AGND
1
2
3
4
5
6
7
8
CZ403
CON8
C307
33P/250V
C302
1N
C305
33P/250V
C325
470pF
R302
22K
R303
100
R312
100
R304
100
R313
27K
R305
27K
R314
100
R306
100
Q313
2SA1360
Q310
2SA1360
Q309
2SA1015
Q305
2SA1015
Q307
2SA970
Q306
2SA970
Q301
2SA970
Q311
2SC3423
Q312
2SC1815
Q308
2SC1815
Q304
2SC2240
Q303
2SC2240
Q302
2SC2240
R308
33
R320
33
R359
10/2W FS
R315
10K
R323
82 FP 1/2W
R321
39K
R317
21/1/4W 1%
R319
1K2 3W 1%
R307
82
R316
22K
R328
300
R311
10K
R310
22K
R326
100K
R324
100K
R309
82 FP 1/2W
D303
1N4148
D304
1N4148
D306
1N4148
D305
1N4148
C308
330P
Q314
2SC3423
R330
3R3/0.5W FP
R332
330/0.5W FP
R334
4K7/3W FP
R338
3R3/0.5W FP
R341
330/0.5W FP
R344
4K7/3W FP
R337
18
R329
18
R331
4R7/FS
R339
4R7/FS
R345
1K2 %1
R346
1K 1%
Q315
KSC2690
Q317
2SC4793
Q324
2SC5200
Q322
2SC5200
Q318
2SA1837
R357
0.05/5W
R356
0.05/5W
R348
15
R349
15
R342
10K
R333
10K
Q321
2SA1943
Q323
2SA1943
C318
0.1uF
+V74
-V74
+72V
-72V
R301
470
AGND
AGND
AGND
AGND
GND
GND
C303
10uF/50V
C304
10uF/50V
C311
100UF/25V
C312
100u/25V
R335
10K
R343
10K
C316
0.1uF
C317
0.1uF
C309
0.1uF
C310
0.1u/80V
AGND
AGND
Q326
2SA970
Q325
C2240
R364
6K8
C321
4u7/50V
R363
22K
R361
1K
R362
56K
C320
22N
D309
BAV21
R365
10K
Q327
2SA1943
Q328
2SC5200
SPGND
R322
1K2 3W 1%
GND
1
VR301
200
R347
220
Q316
2SA1015
C322
10uF/80V
C323
10uF/80V
GND
GND
ADJ DC
R376
220K
R377
82
C315
10uF/50V
R325
39K
R380
2.2
R382
2.2
R384
2.2
R386
2.2
Q319
2SA1943
Q320
2SC5200
R381
2.2
R383
2.2
R385
2.2
R387
2.2
C326
470pF R351
22
GND
R350
180K
C319
10uF/50V
Q337
2SC4793
R388
1
R389
1
Q338
2SA1837
R391
1
R390
1
C328
0.1uF
IC303B
TL082D
C327
1uF
R352
1M
R353
680
AGND
R395
4K7/3W FP
R396
4K7/3W FP
C329
1uF
R354
1M
AGND
AGND
R318
100
L301
100uH
RL302A
RL301A
R399
3R3/1W FP
L302
1uH
C340
22N
PRGND
R371
56K
C331
330u/16V
R368
2K2
GND
SPGND
1
2
3
4
5
6
7
8
9
10
CZ302
CON10
AC DET
PROTECT
RT301
T0=80 degree C
PRGND
SP A
SP B
1
2
CZ301
CON2
AGND
GND
-V74
+V74
L CHANNEL AMP
+72V
-72V
R327
20K
RL302B
RL301B
C332
0.22u
R369
56K
C333
47u/50V
PRGND
1
2
3
4
5
6
7
8
IC304*
uPC1237HA
+V24R
Q350
2SA1015
R375
200
R374
3K3
R370
3K3
R373
100K
R372
N.I.
Q352
2SC1815
Q353
2SC1815
D314
1N4148
D315
1N4148
R379
10K
R378
10K
PRGND
PRGND
B301
THERMAL BREAKER
R393
0
R392
0
D312
1N4148
D313
1N4148
R394
N.I.
PRGND
Q354
2SA1015
R366
100K
R398
10K
R397
100K
PRGND
PRGND
IC303A
TL082D
AGND
D301
18V
D302
18V
C301
0.1uF
C306
0.1uF
R355
10K/0.6W
R358
10K/0.6W
+72V
-72V
Q329
2SC2878
2
3
1
IC301
T
L431
2
3
1
IC302
TL431
Q330
2SC2240
R31
1K
R32
1K2
Q331
2SC3423
Q332
2SA1360
R33
10
R34
10
C314
0.1U
+V24R
1
P301
PCBNUT
1
P302
PCBNUT
1
P303
PCBNUT
D317
1N4148
D318
1N4148
D316
LED
D321
1N4148
D320
1N4148
D319
LED
D323
1N4148
D322
3.6V
D324
3.6V
D325
1N4148
D327
12V
D326
1N4148
C334
2.2uF/50V
C335
2.2uF/50V
R35
200K
D311
1N4148
R37
200K
R36
4.7K
AGND
GND
1
2
3
4
5
6
7
8
CZ303
CON8
to
HS
4-M
3-B
007 PSU VC4.0.SCH
CZ
703
to
HS
4-M
3-B007 PSU
VC4.0.SCH CZ
603
to
t
he binding post
to HS4-M3-B007 PSU VC4.0.SCH
P701 P702 P703
to HS4-M3-B007 PSU VC4.0.SCH
P601 P602 P603
to
t
he binding post
to
HS
4-M
3-B
007 PRE VC4.0.SCH
J203
to
H
S
4-M
3-B
007 PRE
VC4.0.SCH
J103
PRGND
1
P304
PCBNUT
SPGND
1
P304
PCBNUT
SPGND
PRGND
Rxl
2R2
Rxr
2R2
Cxl
0.1uF/50V
Cxr
0.1uF/50V
Note:
Cxr+Rxr network is between the
chassis and the de-coupling ground
with the minimum loop.
Note:
Cxl+Rxl network is between the chassis
and the de-coupling ground with the
minimum loop.
D408
BAV21
D407
BAV21
-74V
R4A6
1K
R4A5
6
K35
2
3
1
IC
405
TL431
Q456
2SC2240
R4A3
1K
Q455
2SA970
R4A2
1K2
D440
1N4148
R4A1
1K
R4A4
10K
R4A7
17K3
+74V
D308
BAV21
D307
BAV21
-74V
R3A6
1K
R3A5
6
K35
2
3
1
IC
305
TL431
Q356
2SC2240
R3A3
1K
Q355
2SA970
R3A2
1K2
D340
1N4148
R3A1
1K
R3A4
10K
R3A7
17K3
+74V
R3B1
0.
1R 1W 5%
R3B2
0.
1R 1W 5%
R3B3
0.
1R 1W 5%
R3B4
0.
1R 1W 5%
R3B5
0.
1R 1W 5%
R3B6
0.
1R 1W 5%
R3B7
0.
1R 1W 5%
R3B8
0.
1R 1W 5%
R4B1
0.
1R 1W 5%
R4B2
0.
1R 1W 5%
R4B3
0.
1R 1W 5%
R4B4
0.
1R 1W 5%
R4B5
0.
1R 1W 5%
R4B6
0.
1R 1W 5%
R4B7
0.
1R 1W 5%
R4B8
0.
1R 1W 5%
CIRCUIT DIAGRAMS
1.POWER AMPLIFIER BOARD
3-12
*IC 304 and IC 404 replaced by Protect Module
R19
56k
R10
100k
Q13
2SC1815GR
Q14
2SC1815GR
1
2
3
4
5
6
7
8
J10
CON8
D10
1N4148
R15
10K
Q10
2SA1015GR
R16
10k
R11
100k
R13
10k
Q15
2SC1815GR
R22
820k
R20
220k
Q16
2SC1815GR
Q17
2SC1815GR
R25
4.7k
R24
180k
Q11
2SA1015GR
R12
10k
R21
220k
Q18
2SC1815GR
Q12
2SA1015GR
R17
100k
D12
1N4148
R18
100k
R14
22k
C10
1N
D13
4.7V
C11
100N
Protect Module
Q19
2SC1815
R23
56K
R26
10k
C12
0.22UF
R27
10k
R28
10k
Replace and change orientation for the part
s
below
:
C601 & C701 From 4.7uF/50V to 0.47uF/50V.
Reverse mount C601 & C701.
Remove the parts below:
R369 & R469 Remove the 56K Ohm resistor.
Replace the part
s
below:
R370 & R470 From 6.8K Ohm to 5.1K Ohm.
Change orientation for the part
s
below:
D601 & D701 Reverse mount the 1N4148.
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