A-905TX
SCHEMATIC DIAGRAM-2
U3
U2
PREAMPLIFIER
CIRCUIT PC BOARD
ACOUSTIC CIRCUIT
PC BOARD
U5
DISPLAY CIRCUIT PC BOARD
-19.1
-23.4
-24.0
-23.4
-13.0
-6.9
-13.0
-6.9
-19.1
-19.7
-0.7
24.1
23.5
22.9
23.5
24.1
23.5
22.9
23.5
-0.7
-24.0
-19.7
S401(1/2)
S401(2/2)
P401B
P501B
JL702A
P405A
D503
MTZJ5.6B
D504
MTZJ5.6B
JL501A
JL501B
C420
104
C416
393
C424
153
C423
153
C415
393
C417
474
C419
104
C418
474
C410
104
C409
104
Q414
2SK246
Q413
2SK246
Q409
2SK246
Q407
2SK246
Q410
2SK246
Q408
2SK246
Q406
2SK246
Q405
2SK246
Q411
2SK246
Q412
2SK246
Q402
NJM2068L-D
Q403
NJM2068L-D
Q402
NJM2068L-D
Q403
NJM2068L-D
Q404
NJM2068D-D
Q404
NJM2068D-D
Q401
NJM4565D-D
Q401
NJM4565D-D
S702
S701
P403B
P502B
JL701A
P583
Q711
DTA114ES
Q712
DTA114ES
D720
SPR-39MVW
Q418
RN1241
Q416
RN1241
Q417
RN1241
Q415
RN1241
Q708
DTC114ES
Q710
DTC124ES
Q709
DTC124ES
JL582A
P461A
R458
R458
R461
250KW
U701
REMSENS
D402
D502
D501
D746
D410
D409
D403
D405
D404
D406
D401
D408
D407
D710
D709
D721
SLR-332VR
D711
SLR-332VR
D723
SEL2E10C
D716
SLR-332DU
D714
SLR-332DU
D717
SLR-332DU
D715
SLR-332DU
D713
SLR-332DU
D712
SLR-332DU
Q707
74HC595
D1
4
LC
12
OE
13
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
RES
10
SC
11
SQH
9
VDD
16
VSS
8
R437(2/2)
100KW
R437(1/2)
100KW
R438(2/2)
100KW
R438(1/2)
100KW
C509
220/6.3
C718
10/16
C519
100/50
C520
100/50
C502
22/50
C522
100/50
C746
100/6.3
C715
10/16
C714
10/16
C514
10/50
C513
10/50
C512
10/16
C521
100/50
C501
22/50
C511
10/16
C426
10/16
C425
10/16
C412
2.2/50
C411
2.2/50
C429
10/16
C430
10/16
C407
47/50
C408
47/50
C510
220/6.3
C404
47/50
C403
47/50
C717
10/16
Q509
2SA992
Q507
2SA992
Q511
2SA992
Q508
2SA992
Q510
2SA992
Q512
2SA992
Q505
2SC1740S
Q501
2SC1845
Q503
2SC1845
Q513
2SC1845
Q502
2SC1845
Q506
2SC1740S
Q504
2SC1845
Q514
2SC1845
C722
103Z
C508
2P
C723
103Z
C503
101
C504
101
C724
223Z
C713
223Z
C721
103Z
C507
2P
C505
101J
C421
822
C422
822
C427
153
C428
153
C414
224
C413
224
C506
101J
C406
102J
C405
102J
C716
223Z
R579
820
R513
3.3K
R514
3.3K
R533
82
(1/4W)
R529
1.2K
(1/2W)
R522
22K
R521
22K
R731
100K
R730
100K
R502
56K
R525
820
(1/2W)
R598
1.2K
(1/2W)
R597
1.2K
(1/2W)
R450
100K
R446
1M
R460
10K
R459
10K
R721
10K
R746
10K
R744
560
R741
100K
R504
1K
R503
1K
R590
33
R589
33
R578
56K
R520
100K
R457
100K
R456
100K
R455
100K
R743
100K
R727
330
R726
390
R577
56K
R517
470
R527
820
(1/2W)
R523
820
(1/2W)
R501
56K
R519
100K
R515
2.7K
R509
330
R505
1.8K
R507
1.8K
R511
330
R537
18K
R535
18K
R531
82
(1/4W)
R453
220K
R451
1K
R454
220K
R452
1K
R518
470
R528
820
(1/2W)
R442
1K
R440
1M
R441
1K
R439
1M
R434
680
R427
1.8K
R425
1M
R423
4.7K
R421
220K
R433
680
R429
1M
R435
100K
R431
1M
R426
1M
R428
1.8K
R422
220K
R424
4.7K
R430 1M
R436
100K
R432
1M
R414
1M
R413
1M
R449
100K
R445
1M
R415
1M
R419
180K
R447
1.2K
R443
1M
R448
1.2K
R444
1M
R416
1M
R418
680
R420
180K
R417
680
R580
820
R530
1.2K
(1/2W)
R526
820
(1/2W)
R524
820
(1/2W)
R516
2.7K
R506
1.8K
R510
330
R512
330
R508
1.8K
R538
18K
R536
18K
R532
82
(1/4W)
R534
82
(1/4W)
R412
4.7K
R410
220K
R408
3.3K
R406
3.3K
R411
4.7K
R409
220K
R407
3.3K
R405
3.3K
R402
330
R401
330
R729
3.3K
R728
3.3K
R724
150
R403
100K
R404
100K
R585
180
R586
180
R587
180
R588
180
R723
560
R722
270
TONE
DIRECT
SOURCE DIRECT
INPUT SELECTOR
RED
GRN
2
3
1
L-2(CDR)
L-1/DVD
TO NADG-6630
TO NADG-6630
TO NADG-6630
TO NADG-6630
TO NADG-6630
TO NADG-6630
TO NADG-6630
TO NAAF-6632
TO NADIS-6634
TO NADG-6630
TO NADG-6630
NADIS-6634
NAETC-6635
NAAF-6631
NAAF-6632
DIRECT
POWER2
MUTE
PHONES
TD
RN
RO
RB
E
LB
LO
LN
TD
RN
RB
E
LB
LO
LN
RO
+B2
-B2
SBASS1
POWER2
R
E
R
L
L
E
E
E
NF-E
NF-E
R
E
R
L
L
L
R
NF-L
NF-R
ST-BY
TAPE
MD
CD
TUNER
HP-IN
VOLUME
SBASS3
SBASS2
INPMUTE
-B
+B
E
-B
+B
E
E
E
REMIN
E
+5.6V
MUTELED
KEYIN
(2/2)
(1/2)
(2/2)
(2/2)
(2/2)
(1/2)
(1/2)
Tone bass
R-IN
L-IN
TREBLE
BASS
(1/2)
ACOSTIC PRESECE
DATA
LAT
CLK
SELIN1
SELIN2
E
+5.6V
LEDB
LEDA
E
Lch
E
Rch
BALANCE
ACOUSTIC PRESENCE
R732
POWER
VOL_IND
A
1
2
3
4
5
B
C
D
E
F
G
