TX-8555
SCHEMATIC DIAGRAMS-1(SD-1)
AMPLIFIER SECTION
TX-8555
Refer to following table about the parts displayed by mark "LIST".
<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.
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
C915, 916
C911, 912
10000/69
8200/56
MDC
MPP, MPA
TYPE --->
FLAC1
FLAC2
-VP
SE1H
CLOCK
DATA
CLOCK
DATA
XM_R
XM_L
R_OUT
L_OUT
-12VA
+12VA
POFF2
DIRECT
SE1H
SP_B
SP_A
PROTECT
SIRIUS_R
SIRIUS_L
TUNER_L
TUNER_R
Z2L_OUT
Z2R_OUT
FLAC2
FLAC1
SP_A
SP_B
PROTECT
AMUT
+22VS
+22VR
XM_L
XM_R
SIRIUS_L
SIRIUS_R
DIRECT
AMUT
MPUGND
-12V
TS_GND
TS_GND
TS_GND
TS_GND
TS_GND
Q491, 492,Q495,496
RN1241-A
TUNER
NC
NC
SPEAKERS
R
LL
R
AB
-22V
+22V
NAAF-9610
PO-R
PO-L
Z2-R
Z2-L
+12R
TO
NAAR-9631
SD-6
:
A3
MDC type only
MDC type only
R
L
R
L
R
L
L
R
R
L
R
L
R
L
R
L
L
R
PHONO
IN
CD
IN
TAPE
OUT
GAME/TV
IN
CBL/SAT
DVD
IN
IN
VCR/DVR
OUT
IN
IN
DIRECT
TONE
TO NADG-9670
SD-2 : D5
+12V
RL1N4003
D931-D934
[0.6V]
[-1.2V]
[-55.8V]
[-22.8V]
<[-0.6V]
<[56.3V]
[-55.7V]>
[57.6V]
[55.8V]
[55.8V]
[-57.6V]
<[-57V]
[0V]>
[1.2V]
<[56.3V]
<[-56.3V]
[-0.6V]
ID+
ID-
[57.6V]
[-57.6V]
[0V]
[0.6V]
NC
LIST
LIST
[0.6V]
[-1.2V]
[-55.8V]
[-22.8V]
<[-0.6V]
<[56.3V]
[-55.7V]>
[57.6V]
[55.8V]
[55.8V]
[-57.6V]
<[-57V]
[0V]>
[1.2V]
<[56.3V]
<[-56.3V]
[-0.6V]
ID+
ID-
[57.6V]
[-57.6V]
[0V]
[0.6V]
NC
NAPS-9614
P915C
P916C WHT
C991 : MDC type only
J271,272
MPP, MPA type only
BLK
8A125V
NAPS-9612
MDC type only
NAAF-9616
BASS
TREBLE
BALANCE
R311
39K
R313
100K
R314
100K
R335
330
R336
330
R337
1M
R338
1M
R344
330
R346
1M
R302
1K
R343
330
R301
1K
R304
56K
R303
56K
R305
220K
R306
220K
C307
100/10
C312
182J
C314
10/50
C345
223Z
R316
330
R319
2.2K
R324
330
R323
330
R331
330
R332
330
R307
820
R308
820
C971 223Z
C928
100/50
C931 223Z
R461
100K
D981
NC
D982
NC
C455
47/25
C456
47/25
R458
3.3K
D983
C981
NC
D984
R315
330
R320
2.2K
C319
NC
P917C
NC
P917D
NC
R341
1M
C953
4.7/50
+
Q924
2SA965-Y
D954
MTZJ4.7B
R953
100K
P917B
NC
C303
47/25
C304
47/25
R455
22K
R456
22K
Q452
DTC123JS
E591
R932
330K
R934
100(1/2W)
R594
(1/2W)
2.2
R572
22K
R571
33K
Q582
2SC2240
C526
NC
+
C526A
NC
+
C315
220/16
C581
100/16
R933
22(1/2W)
C926
100/50
C983
NC
D986
NC
C982
222J
D985
NC
D924
GP104003E
RL1N4003
R339
2.2K
R340
2.2K C330
NC
R935
R453
220K
R451
3.3K
R452
3.3K
R454
220K
R342
1M
C320
NC
R322
1M
R919
1(1/2W)
C925
334J
R442
10
R441
10
R334
1M
R333
1M
R325
1M
R345
1M
R321
1M
R317
1M
Q362
2SA1015
R373
1K
R377
10K
R378
10K
C372
47/25
C342 223Z
C423
223Z
C424
223Z
C416
220/16
R491
47K
R492
47K
R493
270
Q492
Q496
Q491
Q495
Q921
78M12
3
O
2
G
1
I
C919
330/35
J102
J593
C341 223Z
J595 NC
J594
NC
C343
223Z
J596
NC
J900
J903
C371
47/25
J601
NC
R349 22K
R350 22K
C918
1000/35
C918A
NC
C924 334J
Q361
2SC1815
C365
220/16
C366
220/16
R362
68(1/2W)
C361
220/16
C375
47/25
C376
47/25
C373 47/25
C374 47/25
R457
3.3K
C310
682J
C451
47/25
C452
47/25
C391
101K
C392
101K
C930
223Z
C921
223Z
C920
223Z
R462
100K
C415
220/16
E593
NC
R951
(1/2W)
2.2
R952
(1/2W)
2.2
D952
1SS133
D953
1SS133
E592
Q581
2SC2240
R574
47K
C583
1/50
R575
220K
D571
MTZJ5.1B
R573
10K
C582
223Z
Q583
2SA970
R593
(1/2W)
2.2
C525A
NC
+
R310
470K
C311
182J
C313
10/50
R309
470K
C309
682J
R312
39K
C308
100/10
C305
152J
C306
152J
Q403:A
3
2
8
1
4
C453
101K
C454
101K
C459
103J
C461
47/25
J503
NC
C462
47/25
J504
NC
R436
2.2K
D491
1SS133
C443
NC
J103
R435
220K
C442
1/50
Q493
KRA102M
C941
10/50
R420
4.7K
R406
22K
J502
NC
Q401:B
NJM2068L-D
6
5
7
C408
47/25
R402
1K
C402
47/25
R408
3.3K
R401
1K
R405
22K
3
2
8
1
4
3
2
8
1
4 Q401:A
3
2
8
1
4
C401
47/25
R403
220K
J501 NC
R419
4.7K
C407
47/25
C403 47/25
R407
3.3K
C404 47/25
C367
N
C
C368
N
C
C364 470/10
C362
220/16
C363
470/10
R361
68(1/2W)
C381
823J
C377 223J
C379
474J
R375 1.8K
R376
1.8K
C378 223J
C382 823J
C380 474J
C385 47/25
C386 47/25
C383 47/25
C384 47/25
R459
4.7K
C457
NC
Q403:B
Q401, 403 : NJM2068L-D
6
5
7
C458
NC
R496
100
R495
100
R494
270
D450
J901
R327
330
R328
330
JL913B
1
5
Q302
R2S15211FP
64
64 : INL9
63
63 : INR9
62
62 : INLA/RECL1
61
61 : INRA/RECR1
60
60 : INL8
59
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
42 : DATA
41
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 : 24
23
TRE_L : 23
22
BASS_L2 : 22
21
BASS_L1 : 21
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 : 4
3
AGND : 3
2
1-OUT: 2
1
1-C : 1
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)
R404
220K
R326
1M
R329
1M
R330
1M
RL592
C533
102J
C535
102J
C536
102J
Q592
DTC123JS
Q591
DTC123JS
R595
10(1/2W)
C591
103J
C592
103J
D591
D592
C534
102J
RL591
P501
P502
C531
102J
C532
102J
C301
471J
C302
471J
C525
NC
+
C922
47/35
C923
47/35
D361
D362
D361, 362 : MTZJ7.5B
R363
470(1/4W)
R364
470
(1/4W)
R924
470(1/2W)
R931
2.2K(1/4W)
P701B
7
6
5
4
3
2
1
R463 220K
R464
220K
R371
1K
R372
1K
C388
474J
J602 NC
Q922
79M12
3
O
2
I
1
G
JL401A
1
2
3
4
5
6
7
8
9
P705B
P704B
P706
(JOINT)
D922
MTZJ33B
JL918B
1
5
P702B
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Q301:B
NJM4558D-X
5
6
7
Q301:A
NJM4558D-X
2
3
4
1
8
R900
NC
R903
NC
RL450
C527
LIST
C528
LIST
Q921A
HEATSINK
4
31
2
R460
4.7K
P917A
NC
C916
D911
D10XB60H
C915
P916B
P915B
P914B
RL922
Q925
DTC123JS
JL716B
TO NADIS-9671
SD-3 : C2
P371A
1
2
3
4
5
6
7
8
9
10
11
C962
4700/25
D961
RBV402
D3SBA20
C961
334J
R599
390(1W)
R598
390(1W)
D951
1SS133
R925
10(1/2W)
RL921
J591 LIST
J592 LIST
C911
C912
JL915B
JL711B
P302
P301
P303
R318
1M
C426
NC
C425
NC
F913
3.15A125V
J101
C316
220/16
J984
J985 NC
R352 NC
10(1/4W)
R351 NC
10(1/4W)
R354
10(1/4W)
R353
10(1/4W)
D920
RL1N4003
D921
RL1N4003
D918
NC
D931
D932
D933
D934
C428
334J
C429
334J
J982
J981
NC
C317
331K
C318
331K
C321
331K
C322
331K
C323
331K
C324
331K
C325
331K
C327
331K
C328
331K
C329
NC
C331
331K
C332
331K
C326
331K
R508
47
R578
120K
R562
270
Q534
C530
NC
R504 27K
C504 101K
C514 47/25
+
R524
(1/2W)
82
R532
18K
R590
3.3K
R526
(1/2W)
68
R528
(1/2W)
82
R502
470
C502
47/50
+
R520
1K
R506
10
C508
NC
R512
5.6K
R564
100K
Q530
BL
2SC2458-GR
R510
47
R518
1K
C598
NC
Q510
R566
120K
Q506
R522
(1/2W)
82
C596 NC
R536 18K
Q502
Q504
Q508
D512
1SS133
Q516
C506
220/25
+
C516
101K
R588
2K
Q514
C512
NC
R530
(1/2W)
47
R570
22
R542
(1/2W)
2.2
Q524
2SA1943
R568
22
R556
(1W)
8.2
R554
47K
C510
10/50
+
R534
56K
Q518
2SC5171
Q520
2SA1930
P598A
NC
C520
104J
R546
22K
R540
(1/2W)
2.2
R544
(1/2W)
220
R552
33K
J692
NC
P598B
NC
C518 473J
Q528
L502
R548
0.22(5W)
Q522
2SC5200
R580
330
R582
5.6K
R584
3.9K
Q532
R514
56K
R592
(1/4W)
2.2
J512
J514 NC
R558
(1/4W)
2.2
C524
020C
C522
10/50
+
R550
R586
LIST
R516
P512
R507
47
R577
120K
R561
270
Q533
C529
NC
R503
27K
C503 101K
C513 47/25
+
R523
(1/2W)
82
R531
18K
R589
3.3K
R525
(1/2W)
68
R527
(1/2W)
82
R501
470
C501
47/50
+
R519
1K
R505
10
C507
NC
R511
5.6K
R563 100K
Q529
BL
2SC2458-GR
R509
47
R517
1K
C597
NC
Q509
R565
120K
Q505
R521
(1/2W)
82
C595
NC
R535 18K
Q501
Q503
Q507
D511
1SS133
Q515
C505
220/25
+
C515
101K
R587
2K
Q513
C511
NC
R529
(1/2W)
47
R569
22
R541
(1/2W)
2.2
Q523
2SA1943
R567
22
R555
(1W)
8.2
R553
47K
C509
10/50
+
R533
56K
Q517
2SC5171
Q519
2SA1930
P597A
NC
C519
104J
R545
22K
R539
(1/2W)
2.2
R543
(1/2W)
220
R551
33K
J691
NC
P597B
NC
C517 473J
Q527
L501
R547
0.22(5W)
Q521
2SC5200
R579
330
R581
5.6K
R583
3.9K
Q531
R513
56K
R591
(1/4W)
2.2
J511
J513 NC
R557
(1/4W)
2.2
C523
020C
C521
10/50
+
R549
LIST
R585
LIST
R515
LIST
P511
8
9
10
12
11
R921
0.47(1/2W)
JL913A
15
16
19
18
14
R922
0.47(1/2W)
JL917A
R923
4.7(1/2W)
P914A RED
P915A
BLK
P916A
WHT
17
13
C992
104J
C991
104J
C993
104J
P914C RED
JL915A
J722
J721
F912
J911 NC
J912 NC
D912
D10XB60H
F911
P919
JL917B
1
5
JL918A
R418A
4.7K
C406A
473J
C412A
153J
JL401C
9
8
7
6
5
4
3
2
1
R393A
250K
4
1
9
2
8
3
R417A
4.7K
R409A
100KC
R413A
1K
R414A
1K
R409A
100KC
C405A
473J
R421A
NC
C409A
224J
R411A
220
C410A
224J
R422A
NC
R412A
220
C411A
153J
R415A
50KC
C413A
823J
C414A
823J
R415A
50KC
PHONO
EQUALIZER
POWER AMP. L ch
POWER AMP. R ch
SELECTOR/
TONE/
VOLUME
U01
AMPLIFIER PC BOARD
U05 TONE CONTROL PC BOARD
U04
TRANS. SEC. TERMINAL
PC BOARD
To POWER TRANS.
SD-4 : E2
NAETC-9678
NC
P503
PHONES
3
2
1
C875 102J
C874 102J
JL711A
3
2
1
L854
220M
L855
220M
L856
220M
P504
C876
Q505, 506 : 2SC2240-GR, -BL
Q501- 504 : 2SC2240-BL
Q507 - 510, 513, 514 : 2SA949-Y
Q515, 516 : 2SC2229-Y
Q531 - 534 : 2SC1740S-S
R587 :
IDLING ADJUST
R588 :
IDLING ADJUST
Q527, 528 : 2SC2229-Y, -O
R515, 516
MPP, MPA
TYPE--->
MDC
TX-8555
MODEL--->
Refer to following table about the parts displayed by mark "LIST".
R549, 550
R585, 586
3.3K
2.7K
470
820
1.5K
1K
TO NAAF-9616
TONE CONTROL PCB
Rch
Lch
U16
HEADPHONE JACK
PC BOARD
C527, 528
47/100
47/63
LIST
LIST
MDC type only
LIST
LIST
8A125V
C993 :
MPP, MPA type only
TO NAAF-9610
AMPLIFIER PCB
334/100
334/50
J591, 592
NONE
YES
A
1
2
3
4
5
B
C
DE
FG
H
