A-9155
SCHEMATIC DIAGRAMS-1
A-9155
U01
AMPLIFIER PC BOARD
U02
TONE CONTROL PC BOARD
U09
HEADPHONE JACK
PC BOARD
U03
TRANS. SEC.
TERMINAL
PC BOARD
U04
TERMINAL PC BOARD
PROTECT_I
AMUTE
SEL_CLK
SEL_DATA
SPA_RL
SPB_RL
AMUTE
+7V
-7V
TONE_RL
PROTECT_I
SPA_RL
SPB_RL
VOL_5V
GND
GND
L_OUT
R_OUT
+12V
GND
RI
GND
SEL_CLK
SEL_DATA
TONE_RL
HPIN
RCPOWER
-15V
+15V
RI
+15V
-15V
GND
GND_DC
R
L
R
L
R
L
R
L
R
L
R
L
TUNER
CD
LEFT POWER-AMP
RIGHT POWER-AMP
SPEAKERS
OUT
IN
DC PROTECT
EQUALIZER
PHONO
HEATSINK
A
B
L
R
RE
LA
SP-A
LB
LE
RA
RB
Q305-308
MUTING
RI
R
L
SP-R
SP-L
SP-B
RN1241-A
(VOL_GND)
(RLGND)
L
R
E
L
R
+15V
-15V
TONE-L
TONE-R
(DGND)
(DGND)
POWER TRANSFORMER
THERMAL
FUSE
NAAF-9245
NATRM-9255
NAPS-9247
NAETC-9248
HEATSINK
TO NAPS-9257
PHONO
(MM)
TAPE
OUT
IN
LINE
/DOC
+/-7V Supply
NAAF-9246
BASS
TREBLE
ID+
ID-
ID ADJ
-O
39.8V
-39.8V
-39.8V
-39.2V
-38.6V
-0.6V
-13V
39.2V
39.2V
0.6V
39.3V
39.3V
0V
0.6V
-0.6V
-1.2V
1.2V
-39.8V
-39.2V
-0.6V
39.8V
39.8V
0V
0V
0V
ID+
ID-
ID ADJ
-O
39.8V
-39.8V
-39.8V
-39.2V
-38.6V
-0.6V
-13V
39.2V
39.2V
0.6V
39.3V
39.3V
0V
0.6V
-0.6V
-1.2V
1.2V
-39.8V
-39.2V
-0.6V
39.8V
39.8V
0V
0V
0V
R904
8.2K
R905
8.2K
R227
330
R228
330
R231
330
R232
330
R239
2.2K
R240
2.2K
R243
330
C227
101K
R248
2.2K
R251
330
R252
330 C230
101K
R245
1M
C221
101K
C222
101K
R229
1M
R250
1M
C229
101K R253
1M
R254
1M
R244
330
Q582
2SC2240
R572
22K
R574
47K
R575
220K
JL711B
3
2
1
Q581
2SC2240
R596
680(1W)
R436
2.2K
D491
1SS133
Q493
KRA102M
C941
10/50
J103
NC
C442
1/50
R230
1M
C377
223J
C378 223J
C381
823J
C382 823J
R376
1.8K
R375 1.8K
C380
474J
C385
47/25
R361
68(1/2W)
C365
220/16
C366
220/16
R364
680(1/4W)
R362
68(1/2W)
C362
220/16
C361
220/16
D361
MTZJ7.5C
D362
MTZJ7.5C
R363
680(1/4W)
C372
47/25
C371
47/25
J601
NC
J602
NC
R372
1K
R371
1K
R377
10K
R378
10K
R373 1K
R923
10(1/4W)
R924
10(1/4W)
R121
100K
R122
100K
P501
3
1
5
4
2
8
6
10
9
7
R595
680(1W)
C592
103J
Q591
DTC123JS
C923
22/50
D571
MTZJ5.1B
C581
100/16
Q592
DTC123JS
D592
D591
C575
1/50
C531
102J
C532
102J
C533
102J
C534
102J
C535
102J
C536
102J
R598
390(1W)
R599
390(1W)
R571
33K
P205
1
2
3
P202
7
3
1
2
6
4
5
P203
7
3
1
2
6
4
5
P201
3
1
2
6
4
5
9
7
8
Q101:B
NJM4558D-X
5
6
7
Q101:A
NJM4558D-X
3
2
8
1
4
R101
1K
R102
1K
C103
471K
R103
56K
R104
56K
R105
220K
R106
220K
C117
152J
C118
152J
R107
820
R108
820
C109
682J
R113
470K
C111
182J
R111
39K
C112
182J
R112
39K
R114
470K
C110
682J
C104
471K
C925
223Z
R234
1M
R233
1M
C223
101K
C224
101K
R241
1M
R242
1M
C236
223Z
C235
223Z
C225
NC
C226
NC
C232
NC
R247
2.2K
C231
NC
R249
1M
C904
104J
C903
104J
D901
RBV402
1
3
4
2
C527
47/63
C528
47/63
R573
10K
Q583
2SA970
C582
223Z
R593
2.2(1/2W)
R493
270
R494
270
Q491
Q492
R495
100
R496
100
Q495
Q496
R594
2.2(1/2W)
C228
101K
R246
1M
P904B 1
2
3
P902C
NC
R451
3.3K
R458
3.3K
R455
22K
R456
22K
C453
101K
C454
101K
C455
47/25
R457
3.3K
R454
82K
C461
47/25
R452
3.3K
C462
47/25
C451
47/25
C452
47/25
R453
82K
R462
100K
R463
220K
R464
220K
R435
220K
C415
220/16
C416
220/16
D450
C459
103J
R461
100K
R491
47K
R492
47K
Q452
DTC123JS
C456
47/25
JL209B
1
2
3
4
5
6
7
8
9
10
C386
47/25
JL211B
3
2
1
JL212B
8
7
6
5
4
3
2
1
P904A
1
2
3
16
15
14
12
10
R915
2.2(1/2W)
P504
JL711A
1
2
3
C584
102J
C585
104Z
C583
102J
L583
220M
L584
220M
L585
220M
C428
223Z
C429
223Z
P691
WS-CLAMP
P692
WS-CLAMP
P693
WS-CLAMP
C905
8200/56
C906
8200/56
P902B
P901B
P903B
P901A
P902A
P903A
R701
470
L701
NC
L702
NC
Q921
78M15
3
O
2
G
1
I
C919
1/50
J701
Q922
79M15
3
O
2
I
1
G
E591
C924
22/50
C930
223Z
C931
223Z
C932
10/50
C933
10/50
Q312
R2S15211FP
64
INL9
63
INR9
62
INLA/RECL1
61
INRA/RECR1
60
INL8
59
INR8
58
INL7
57
INR7
56
INL6
55
INR6
54
INL5
53
INR5
52
INL4
51
INR4
50
INL3
49
INR3
48
INL2
47
INR2
46
INL1
45
INR1
44
AVEE
43
CLOCK
42
DATA
41
DGND
40
MONO
39
SUBL
38
SUBR
37
ADCR
36
ADCL
35
FRIN2
34
FLIN2
33
SRIN2
32
SLIN2
31
SWIN2
30
CIN2
29
SBRIN2
28
SBLIN2
27
TRE_R
26
BASS_R2
25
BASS_R1
24
AVCC
23
TRE_L
22
BASS_L2
21
BASS_L1
20
FRC
19
FROUT
18
AGND
17
FLOUT
16
FLC
15
6-C
14
6-OUT
13
AGND
12
5-OUT
11
5-C
10
4-C
9
4-OUT
8
AGND
7
3-OUT
6
3-C
5
2-C
4
2-OUT
3
AGND
2
1-OUT
1
1-C
80
SBRIN1
79
SBLIN1
78
SRIN1
77
SLIN1
76
SWIN1
75
CIN1
74
FRIN1
73
FLIN1
72
RECL3
71
RECR3
70
INL11/RECL5
69
INR11/RECR5
68
INL10/RECL4
67
INR10/RECR4
66
INLB/RECL2
65
INRB/RECR2
(Top view)
T902
NPT-1293P
6
7
2
4
16
15
14
12
10
Q361
2SC1815
Q362
2SA1015
R442
10(1/4W)
R441
10(1/4W)
D902
D903
D904
D905
J902 NC
C388
474J
R906
100(2W)
R907
100(2W)
D909
MTZJ30D
D910
MTZJ30D
C911
47/50
C912
47/50
R443
330(1/2W)
C908
2200/16
C909
223Z
Q901
78M05
3
O
2
G
1
I
C908A
NC
C107
330/25
C108
330/25
C101
47/50
C102
47/50
C115
10/50
C116
10/50
Q403:A
NJM2068L-D
3
2
8
1
4
C457
NC
Q403:B
NJM2068L-D
6
5
7
C458
NC
C234
223Z
C910
10/50
JL210B
5
4
3
2
1
J503
NC
J901NC
J341
NC
C241
102K
C702
NC
J504
NC
J340
NC
C120
NC
C591
103J
C538
NC
C537
NC
C379
474J
C363
470/10
C364
470/10
C367
NC
C368
NC
R401
1K
JL209A
10
9
8
7
6
5
4
3
2
1
R405
22K
Q401:A
3
2
8
1
4
3
2
8
1
4
NJM2068L-D
3
2
8
1
4
C401
47/25
R408
3.3K
R406
22K
Q401:B
NJM2068L-D
6
5
7
R402 1K
C408
47/25
C402
47/25
C409
224J
R418
4.7K
R414
1K
C410
224J
C407
47/25
R417
4.7K
P431
WS-CLAMP
P432
WS-CLAMP
R419
4.7K
R420
4.7K
R403
220K
C403
47/25
R404
220K
C405
473J
C406
473J
C404
47/25
J501 NC
J502
NC
C437
220/16
C438
220/16
R407
3.3K
R413
1K
R421
NC
R422
NC
R409
100KC 9
3
2
1
R409
100KC
5
6
7
R415
50KC
6
5
7
R415
50KC
2
3 9
1
R437
22(1/4W)
R438
22(1/4W)
C907
104J
C914
NC
C913
NC
Q922B
Q921B
C920
1/50
Q903
Q903B
Q903A
2SA1488-Y
RL591
6
3
4
5
2
1
RL592
6
3
4
5
2
1
R459
4.7K
R460
4.7K
R911
JUMPER
R411
220
R412
220
C411
123J
C412
123J
C413
823J
C414
823J
Q902A
2SC3851-Y
Q902
Q902B
RL450
8
10
5
3
12
1
4
9
P502
PHONES
3
2
1
C519
104J
R569
22
R545
22K
L501
J691
NC
R555
(1W)
8.2
C517
473J
P511
1
2
R513
56K
R591
(1/4W)
2.2
Q519
2SA1930
Q517
2SC5171
R553
47K
R551
33K
R539
(1/2W)
2.2
R501
470
Q527
2SC2229-Y
Q521
2SC5197
R579
330
C501
47/50
+
R503
27K
C503
101K
C529
NC
R519
1K
R521
(1/2W)
82
R561
270
R589
3.3K
C511
NC
Q503
2SC2240-BL
R531
18K
R525
(1/2W)
68
C521
10/50
+
Q515
2SC2229-Y
C515
101K
C505
220/25
+
C597
NC
C523
020C
R529
(1/2W)
56
R535
18K
C595
NC
Q501
2SC2240-BL
R505
10
R511
5.6K
R523
(1/2W)
82
Q529
BL
2SC2458-GR
Q505
BL
2SC2240-GR
R563
100K
R527
(1/2W)
82
R515
1.5K
C507
NC
R587
2K
R583
3.9K
R581
5.6K
R517
1K
R577
120K
C513
47/25
+
R565
120K
R567
22
R533
56K
P597A
NC
P597B
NC
R549
3.3K
Q523
2SA1940
R541
(1/2W)
2.2
R585
1K
R507
330
R509
330
R543
(1/2W)
82
C509
NC
+
D511
1SS133
R547
0.22(5W)
Q507
2SA949-Y
Q513
2SA949-Y
Q509
2SA949-Y
Q531
2SC1740S-S
Q533
2SC1740S-S
C520
104J
R570
22
R546
22K
L502
J692
NC
R556
(1W)
8.2
C518
473J
P512
1
2
R514
56K
R592
(1/4W)
2.2
Q520
2SA1930
Q518
2SC5171
R554
47K
R552
33K
R540
(1/2W)
2.2
R502
470
Q528
2SC2229-Y
Q522
2SC5197
R580
330
C502
47/50
+
R504
27K
C504
101K
C530
NC
R520
1K
R522
(1/2W)
82
R562
270
R590
3.3K
C512
NC
Q504
2SC2240-BL
R532
18K
R526
(1/2W)
68
C522
10/50
+
Q516
2SC2229-Y
C516
101K
C506
220/25
+
C598
NC
C524
020C
R530
(1/2W)
56
R536
18K
C596
NC
Q502
2SC2240-BL
R506
10
R512
5.6K
R524
(1/2W)
82
Q530
BL
2SC2458-GR
Q506
BL
2SC2240-GR
R564
100K
R528
(1/2W)
82
R516
1.5K
C508
NC
R588
2K
R584
3.9K
R582
5.6K
R518
1K
R578
120K
C514
47/25
+
R566
120K
R568
22
R534
56K
P598A
NC
P598B
NC
R550
3.3K
Q524
2SA1940
R542
(1/2W)
2.2
R586
1K
R508
330
R510
330
R544
(1/2W)
82
C510
NC
+
D512
1SS133
R548
0.22(5W)
Q508
2SA949-Y
Q514
2SA949-Y
Q510
2SA949-Y
Q532
2SC1740S-S
Q534
2SC1740S-S
To NACPU-9251
(SD2 : C5)
To NACPU-9251
(SD2 : D5)
To NACPU-9251
(SD2 : E5)
SELECTOR/VOLUME
L
R
R588
IDLING ADJUST
R587
IDLING ADJUST
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED.
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL).
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN uF/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
!
NOTE
<Note>
NC = No mount of parts.
SD-Z : XY
Location of connected terminal in schematic diagrams.
SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5.
A
1
2
3
4
5
B
C
D
E
F
G
H
