Onkyo A-905-TX Service manual

SERVICE MANUAL

INTEGRATED STEREO AMPLIFIER

A-905TX

Ref. No. 3677

052001

STANDBY/ON

STANDBY

POWER

ON OFF

INTEGRATED STEREO AMPLIFIER

CD

MD TUNER

TAPE

LINE/DVD

CDR/PC

PHONES

TREBLEBASS BALANCE

—+ —+ LR

UDT 120V AC, 60Hz UPT 230-240V AC, 50Hz

VOLUME

DIRECT

SOURCE DIRECT

DIRECT

WIDE RANGE AMP TECHNOLOGY

TONE

STANDBY/ ON

PRESET

REPEAT

PLAY MODE

REPEAT

MEMORY

REPEAT

TONE

INPUT

ACOUSTIC PRESENCE

OFF/1/2

A-905TX

TIMER

UP/DOWN

ENTER

CLOCK SLEEP EFFECT

F MA M

SCROLL

CLEAR

REC

RANDOM

CLEAR

DISC

PLAY MODE

CLEAR

REC

123

456

789

- - / - - -

10 / 0

REMOTE CONTROLLER

PAUSE / STEP

ACOUSTIC PRESENCE

GRAPHIC EQ

MODE

INPUTTUNER

TAPE

MUTING

VOLUME

RC

DVD

M D

C D

CDR

-

456

S

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ON THE

SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE

CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.

REPLACE THESE COMPONENTS WITH ONKYO

PARTS WHOSE PART NUMBERS APPEAR AS SHOWN

IN THIS MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE

MEASUREMENTS TO DETERMINE THAT EXPOSED

PARTS ARE ACCEPTABLY INSULATED FROM THE

SUPPLY CIRCUIT BEFORE RETURNING THE

APPLIANCE TO THE CUSTOMER.

SPECIFICATIONS

PART-XX

A-905TX

SERVICE PROCEDURES

PART-XX

Replacing the fuses

This symbol located near the fuse indicates that the fuse used is show operating type, For continued protection against fire hazard, replace with same type fuse , For fuse rating, refer to the marking adjest to the symbol.

Ce symbole indique que le fusible utilise est e lent. Pour une protection permanente, n'utiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est apposre.

REF.NO.

F901 252158 1.6A-UL/T-237, Fuse <DT>

F902-F904 2.5A-SE-EAK, Fuse <PT>

NOTE:

<DT> : Asian model only for 120V <PT> : Asian model only for 230V

PART NO.

252069 0.8A-SE-EAK, Fuse <PT> 252075

DESCRIPTION

A-905TX

CHASSIS EXPLODED VIEW

############

P901

P584A

A40

A81

P801

A11

A43

F901

F902

U4

A11

A26

A43

A41

A25

T901

F904

U10

A27

F903

A34

U7

Q523

A27

A34

U8

Q527

A10

E860

U1

Q525

Q526

U2

A10

P402

Q524

Q528

A10

A16

P402

A28

A10

U9

U3

P701

A67

A10

A49

U5

A50

A49

A52

A10 A58

A63

A1 A56

A53

A10

A13

A11

A54

A47

A55

A66

A46

A49

A51

A61

A65

A64

A11

A73

CHASSIS EXPLODED VIEW PARTS LIST

############

REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION

A1 27111123 A10 838130088 3TTB+8B, Self tapping screw P584A 880009 Plastic rivet, NRP-345 <PT> A11 838430088 3TTB+8B(BC), Self tapping screw P701 27191106 UAMS-05S-2, Holder A13 28198862 Facet, VOL P801 25055436 or NPLG-2P418, Shorted plug A16 27100375D Chassis 25055945 A25 27160451B

A26 29110083 Adhesive tape, CROSS-16U Q523,Q524 2202303 or A27 801525 3TTB+8B(BC), Special screw <PT> 2202304 or

A28 801433 3SMS8W.SW+14B(BC), special screw Q525,Q526 2202313 or A34 27141530A Retainer, HS-2 2202314 or A40 27300750 Bussing cord 2202315 A41 27122831 Rear panel <DT> Q527,Q528 2212654 or

A43 830440089 4TTC+8C(BC), Self tapping screw A46 28184759-1 A47 29362571 A49 838930088 A50 838430107 3TTB+10S(BC), Self tapping screw A51 27212298 Front panel A52 28198894 Facet 7P A53 28198895 Facet 1P A54 28198925 Facet A A55 27268037 Guide A A56 28325133 Knob, FM A58 28191798 Clear plate, RE A61 28325926 Knob, INPUT A63 28135247Y Badge A64 28325925 Knob, VOL A65 28325674 Knob, TD A66 28325927 Knob, TONE A67 28325673 Knob, POWER A73 27175323 Leg AS A81 29362630 Label, PROCESSOR F901 252158 1.6A-UL/T-237, Fuse <DT>

F902-F904 2.5A-SE-EAK FUSE <PT>

NOTE: THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.

27160452B

838430088 3TTB+8B(BC), Self tapping screw <DT> 2202305

27122832 Rear panel <PT> 2212653

252069 0.8A-SE-EAK FSBFUSE, Fuse <PT> 252075

Front bracket P402 27190011 KGLS-6S, Holder

Heat sink <DT> P901 253277MIL AS-UC-2#18, Power supply cord <DT> Heat sink <PT> 253193HIT AS-CEE, Power supply cord <PT>

Top cover Label, WARNING <DT,PT>

3TTB+8B(UN), Self tapping screw

2SC4512-O or

*

2SC4512-Y or

*

2SC4512-P, Transistor

*

2SA1726-O or

*

2SA1726-Y or

*

2SA1726-P, Transistor

*

2SC3421-Y or

*

2SC3421-O, Transistor

T901

U1

U2

U3

U4

U5

U7

U8

U9

U10

NOTE:

<DT> : Asian model only for 120V <PT> : Asian model only for 230V

CAUTON :

Replacement of the transistor of mark * ,if necessary, must be made from the same beta group(HFE) as the original type.

2301423 NPT-1374D, Power transformer <DT> 2301424 NPT-1374P, Power transformer <PT> 1A905530-4B 1A905530-4C 1A905531-4B 1A905531-4C 1A905532-4B 1A905532-4C 1A905533-4B 1A905533-4C 1A905534-4B 1A905534-4C 1A905536-4B 1A905536-4C 1A905537-4B 1A905537-4C 1A905539-4B 1A905539-4C 1A905540-4C

*

NADG-6630-4B, Main circuit PC board ass'y <DT> NADG-6630-4C, Main circuit PC board ass'y <PT> NAAF-6631-4B, Preamplifier circuit PC board ass'y <DT> NAAF-6631-4C, Preamplifier circuit PC board ass'y <PT> NAAF-6632-4B, Acoustic circuit PC board ass'y <DT> NAAF-6632-4C, Acoustic circuit PC board ass'y <PT> NAPS-6633-4B, Power supply circuit PC board ass'y <DT> NAPS-6633-4C, Power supply circuit PC board ass'y <PT> NADIS-6634-4B, Display circuit PC board ass'y <DT> NADIS-6634-4C, Display circuit PC board ass'y <PT> NAETC-6636-4B, Speaker terminal PC board ass'y <DT> NAETC-6636-4C, Speaker terminal PC board ass'y <PT> NAETC-6637-4B, Terminal PC board ass'y <DT> NAETC-6637-4C, Terminal PC board ass'y <PT> NAETC-6639-4B, Power switch PC board ass'y <DT> NAETC-6639-4C, Power switch PC board ass'y <PT> NAETC-6640-4C, Fuse PC board ass'y <PT>

A-905TX

A

SCHEMATIC DIAGRAM-1

NADG-6630

P307

1

2

REC

CDR/PC

PLAY

CD

REC

MD

PLAY

PROCESSOR

LEFT

OUT

RIGHT

LEFT

IN

RIGHT

LEFT

RIGHT

P301

LEFT

RIGHT

LEFT

RIGHT

P302 LEFT

RIGHT

LEFT

RIGHT

P303

R351

2.2K R352

2.2K

R301 330

R302

330

R305 330

R306

330

R309

2.2K

R310

2.2K

R313 330

R314

330

R317

2.2K

R318

2.2K

R321 330

R322

330

R303 1M

R304 1M

R307

R308

R311

1M

R312 1M

R315

1M

R316 1M

R319

1M

R320 1M

R323

1M

R324

1M

R353 1M

R354 1M

1M

*C301

*C302

101K

*C303

*C304

101K

*C307

*C308

101K

*C311

*C312

221K

101K

221K

C309

101

U1

MAIN CIRCUIT

3

4

5

PC BOARD

P304

LEFT

TUNER

RIGHT

LEFT

LINE/DVD

RIGHT

P305

LEFT

REC

RIGHT

TAPE

LEFT

PLAY

RIGHT

RI

TERMINAL PC BOARD

U8

NAETC-6637

PARTS

C301-C304,C307,C308

NUMBER

C311-C316,C319,C320

C581,C582

NO USE

UJJ,UDT UPT

USE

R325 330

R326

330

R329 330

R330

330

R333

2.2K

R334

2.2K

R337 330

R338

330

P306

R712,R713,R718,R719 R742

*C313

R327

101K

1M

R328

*C314

1M

101K

R331

C315

101K

1M

R332

*C316

1M

101K

R335

1M

R336 1M

*C319

R339

101K

1M

R340

*C320

101K

1M

ONE TIME ONLY

P311A

P311B

THIS SYMBOL LOCATED NEAR THE FUSE INDICATES THAT THE FUSE USED IS SLOW OPERATING TYPE FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL

CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.

BCDEFG

10

11

12 17

CAUTION

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE

VA

AND RATING INDICATED.

ATTENTION

AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT

VA

PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.

Q301

TC9273N-010

CDR-P2

CD3

TU4

L/DVD5

MD-R6

MD-P7

T-R8

T-P9

ST14

TO NAAF-6631

P405B

VDD28VEE1

27

26

25

24

23

22

21

20

19

18

DATA16GND13

CK15

D706

Q704 DTA124ES

D704

R706

R707 220K

NOTE

.

THE COMPONENTS REPLACE ONLY

.

VOLTAGE (MEASURED WITHVOLTMETER) IS

.

ALL PNP TRANSISTORS ARE EQUIVALENT

.

ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.

.

ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.

.

ELECTROLYTIC CAPACITORS ()ARE IN F/WV.

.

ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED. EX) 030 3pF 330 33pF 331 330pF

.

ALL RESISTORS ARE IN OHMS 1/4WATTS

.

THE THICK LINES ON PC BOARD ARE THE EX) PRINTING SIDE

.

CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.

D705 MTZJ5.6B

IDENTIFIED

WITH PART

47K

E

R

L

E

POWER2

C321 10/16

ARE CRITICAL FOR

BY MARK

NUMBER SPECIFIED.

333 0.033uF

DC VOLTAGE. (NO INPUT SIGNAL)

TO 2SA1015-GR UNLESS OTHERWISE NOTED.

u

UNLESS OTHERWISE NOTED.

PRINTING SIDE OF THE PARTS.

P405C

P401A

SAFETY

Acoustic Presence

TO NAAF-6632

EEERR

L

+B2

-B2

R733

1K R7341K R735

1K

C322 10/16

TO NAAF-6632

POWER2

R472 220K

Q451

DTA114ES

Q703 DTC144ES

MUTING

S.BASS3

2.2/50

S.BASS1

S.BASS2

C452

2.2/50 C451

2.2/50

R471

2.2K

C710

223Z

D722

D703

C709

223Z

C708

R595

10

(1/2W)

0.1/5.5

P501A

-B1

+B1

R593 10

(1/2W)

Q705

2SC1740S-R

Q706

2SA933S-R

R705 22K

C702

474 C701

AMP&VR

NF-L

R717 22K

X701

CST4.00MGW

R701 1M

R736

100K

TO NAAF-6631

R

L

E

R716

12K

R715

68K

TEST

1

RESET

2

X1

3

X2

4

GND

5

AVSS

6

SELIN1

7

SELIN2

8

KEYIN

9

905/909

10

RIOUT

11

R742 100K

*

D701

R714

68K

C712 104J

44

RIIN

12

43

CE

HP-IN

13

D708

NF-R

39

40

42

41

38

CLK

LAT

DATA

SBASSLEDB

Q701 HD404316-E30H

AVCC

POFF

REMIN

VCC

DIRECT

15

14

17

18

16

*

R712

100K*4

TO NAAF-6631

P502AP403A

-B1

+B1

R596 10

(1/2W)

34

35

36

37

SBASS3

PROTECT

SBASS2

SBASSLEDA

SBASS1

INPMUTE

POWER2

VOLDOWN

VOLUP

SP-RELAY

MUTELED20NC

22

21

19

+B5

5.6

C922 10/16

C711 1/50

E

33 32 31 30 29 28 27 26 25 24 23

78M56

Q911

IO

G

C921 223Z

R711 4.7K Q713

M51943B

IO

G

R59410(1/2W)

R713 100K*7 *

12.2

+B2

330/16

-12.2

-B2

R917

10

(1/2W)

D707

MTZJ5.1B

R571

220

R567

1.8K

R569

1.2K

R573

220

R572 220

R568

1.8K R570

1.2K

R574 220

DTC144ES

C916

C917

R709 1K

R710

3.3K

2SC3421

R575 500B

2SC3421

R576 500B

Q714

MTZJ12C

D912

D913

MTZJ12C

Q527

-1.2

Q528

-1.2

R708

2.2K

R551

24.1

1.2

(1/2W)

Q529

2SC1740S

Q530 2SC1740S

C707 223Z

3.3K

R738

R913

220

(1/2W)

R915

220

Q515 2SC1845

Q517

2SA992

24.1

Q516

2SC1845

Q518

2SA992

-24.1

C704

223Z

R912

270

(1/2W)

R914

270

(1/2W)

C515 10/16

-24.1 R545

100

(1/2W)

R544 100 (1/2W)

(1/2W)

C516

10/16

R546 100

(1/2W)

9 8 7 6 5 4 3 2 1

C703

100/6.3

D702

3300/35

R547

15

(1/2W)

R548

15

R550

(1/2W)

24.6

C914

C915

-24.6

R555

82

(1/2W)

R549

15

R556

82

(1/2W)

15

R745

1K

Q702 TA7291S

+B1

-B1

+B3

L505

Q519 2SA965

L503

R557 10 (1/2W)

Q521 2SC2235

-24.6 R553

2.2

R552

2.2

(1/2W)

24.6

Q520 2SA965

R560

10

(1/2W)

L506 Q522 2SC2235

-24.6 R554

2.2

C920 2200/16

R559

10

(1/2W)

L504

R558

10

(1/2W)

2SA1726

(1/2W)

R561

0.22*2

(2W)

(1/2W)

R562

0.22*2 (2W)

Q526

Q523

2SC4512

R601

C531 223Z

Q525

Q524

2SC4512

R602

C532 223Z

L502

(1/2W)

+B4

D918

D918 GP104003E

1K

L501

R563

4.7

(1/2W)

R605 820

2SA1726

2SC1845

1K

R564

4.7

R606 820

*

R718 100K R719

*

100K

D911

RBV402

D3SBA30

12.411.8

R603 680

R608 10K

Q532

R604 680

8.2

R566

D914-D917 GP104003E

C919 47/16

Q531

2SC1845

C518

473

(1/2W)

R610

10K

Q533 2SA992

D745

MTZJ5.1B

+

R739 22K

R607

10K

C533 223Z

2.2

R543

(1/2W)

100

24.6

(1/2W)

-B1

R740 10K

C912 104J

C913 104J

C517 473

R565

8.2

(1/2W)

SUBWOOFER PREOUT

R582

10K

R583 10K

RL901

+B1

Q912

DTC123JS

C918

103J

C923 223Z

D919

P582

R581

680

JL581A

P585A

P586A

JL582B

L-OUT

E

R-OUT

TO NADIS-6634

P913A

P914A

U10

P461B

Rch

FUSE PC

E Lch

BOARD

TO NADIS-6634

DATA

LAT

CLK

SELIN1

SELIN2

JL701B

E

+5.6V

LED B

LED A

DIRECT

REMIN

E

+5.6V

JL702B

MUTELED

KEYIN

HP-IN

P911B P902B

P912B

JL901B

C581 471

JL581C

P585B

P586B

NAETC-6636

NAETC-6640

F903 T2.5AL250V

F904

T2.5AL250V

TO NADIS-6634

SPEAKERS

P584

C582

471

P911A

P911C

P912A

P912C

P902A

P911AP912A

P902AP911AP912A

U7

L

R

U9

NAETC-6639

P902A

R916

0.47 NPT-1374P

(1/2W)

NAPS-6633

NAETC-6639

R916

JL901A JL901A

0.47

(1/2W)

NAPS-6633

NAETC-6639

R916

JL901A

0.47

(1/2W)

NAPS-6633

SPEAKER TERMINAL PC BOARD

POWER SWITCH PC BOARD

S951 C951

0.01

P952

P951

P951P952

T901

F902

T2AL250V

F901

P910

T800mAL250V

P901

AC230-240V/50HZ

U4

POWER SUPPLY CIRCUIT

UPT

PC BOARD

S951 C951

0.01

P951

P952

P951

T901

NPT-1374D

P901

AC120V/60Hz

UDT

P951

P901A P901A P901A

P901

AC100V/50Hz

/60Hz

UJJ

T901

NPT-1374J

F901

1.6A/125V

S951 C951

0.01

F901

1.6A/125V

P952

P910 P910

A-905TX

A

SCHEMATIC DIAGRAM-2

C403

R401

330

47/50

1

R402

330

R403 100K

C404

47/50

R404 100K

2

C429

C430

10/16

ACOUSTIC CIRCUIT

U3

PC BOARD

NAAF-6632

3

4

PHONES

P583

5

NJM4565D-D

Q401

C405

102J

NJM2068L-D

(1/2)

Q403

R419 180K

NJM4565D-D

Q401

C406

102J

(1/2)

Q402

R420

NJM2068L-D

TO NADG-6630

R586 180

R588

180

180K

L-IN

JL582A P461A

R585 180

R587 180

R405

3.3K

ACOUSTIC PRESENCE

R407

3.3K

(1/2)

R413 1M

C409

R417

680

104

C413

C411

2.2/50

224

R415

1M

R408

3.3K

(2/2)

R406

3.3K

R414 1M

C410

R418

Q406 2SK246

680

104

C414

224

C412

R416

2.2/50 1M

R455 100K

R456 100K

R457 100K

INPMUTE

E

R-IN

R461

250KW

Rch

BALANCE

BCDEFG

NAAF-6631

U2

PREAMPLIFIER CIRCUIT PC BOARD

LN LO LB

E RB RO

TO NADIS-6634

RN TD

1K

R504

C520

100/50

C522

100/50

E

NF-E

31

2

GRN

L

R

E

TO NADG-6630

R731 100K R730 100K

Q712 DTA114ES

R726 390

D720 SPR-39MVW

NF-R

Q711

E

R727 330

E

RED

R503

1K

C503

101

C519 100/50

C521 100/50

E

NF-E

E

NF-L

R741 100K

INPUT SELECTOR

R732

+B

C501

22/50

R501

R521

22K

10/16

R522

22K

-B

HP-IN

56K

C511

D501

C502

22/50

C504 101

C512 10/16

P501B

MUTELED

KEYIN

R724 150

Q708

DTC114ES

R519 100K

D502

+5.6V

D723

R505

1.8K

Q501

2SC1845

R509

330

-19.1

D503

MTZJ5.6B

R506

1.8K

Q502

2SC1845

R510

330 R502 56K

R520 100K

E

REMIN

SEL2E10C

VOL_IND

U5

R523

R507

1.8K

22.923.5

-0.7 R511

330

-6.9

Q505

2SC1740S

R517

470

-19.7

R508

1.8K

22.923.5

-0.7

R512

330

-6.9

Q506

2SC1740S

R518

470

-19.1 D504

MTZJ5.6B

DIRECT

TO NADG-6630

JL702A

C718 10/16

Q503 2SC1845

R579 820 C509

220/6.3

R513

3.3K

-13.0

R515

2.7K

Q504

2SC1845

R580

820

R514

3.3K

-13.0

-19.7

R516

2.7K

820

(1/2W)

-23.4

R524 820

(1/2W)

-23.4

REMSENS

U701

Q507 2SA992

Q509

2SA992

R529

1.2K

(1/2W)

R597

1.2K

(1/2W)

R525 820

(1/2W)

R528

820

(1/2W) Q508 2SA992

Q510

2SA992

C510 220/6.3

R598

1.2K

(1/2W)

R526 820

(1/2W)

10/16

23.5

C717

R527 820

(1/2W)

R535 18K

R536 18K

R530

1.2K

(1/2W)

R728

3.3K

D710

R589 33

Q513

2SC1845

-24.0

R532

(1/4W)

R590

33

Q514

2SC1845

-24.0

24.1

24.123.5

DISPLAY CIRCUIT PC BOARD

NADIS-6634

R537

18K

82

C506 101J

R538 18K

C716 223Z

R531

82 (1/4W) Q511 2SA992

C505 101J

C513

10/50

R533

82

(1/4W)

Q512

C508

2P

R534

82

(1/4W)

S701

POWER

C507

2P

R577

56K

2SA992

C514

10/50

R578 56K

R729

3.3K

S702

ACOSTIC PRESECE

JL501A

LN LO LB

E RB RO

TO NAAF-6632

RN TD

NAETC-6635

SOURCE DIRECT

BASS

R437(1/2)

R437(2/2)

100KW

S401(1/2)

S401(2/2)

100K R743

100KW

C424 153

TREBLE

R438(1/2)

100KW

C423

R441

1K

153

R438(2/2)

100KW

R442

1K

DIRECT

TONE

R439

R440

1M

D409

Q413 2SK246

1M

D410

Q414 2SK246

R409 220K

R411

4.7K

D401

Q405

2SK246

R410 220K

R412

4.7K

D402

SBASS3

SBASS2

SBASS1

TO NADG-6630

E

Lch

TO NADG-6630

MUTE

D405

R427

1.8K

D403

D406

R428

1.8K

POWER2

C724

223Z

-B

Q409

Q407

D404

P403B

+B

2SK246

R425

1M

2SK246

R431

Q410

2SK246

R426

1M

Q408

2SK246

R432

1M

P502B

D721

SLR-332VR

R723

R722

R421

220K

R423

4.7K R429

1M

C415

393

C417

474

R422 220K

R424

4.7K

R430 1M

C416

393

C418

474

VOLUME

R744 560

D711

560

270

ST-BY

R433

680

C419

104

C421 822

R435

100K

R434

680

C420

104

C422 822

R436 100K

TO NADG-6630

L

R459

10K

C722 103Z

C721

103Z

QA 15

VDD 16

QB1

QC2

SLR-332VR

D712

CD

NJM2068L-D

(2/2)

Q403

NJM2068L-D

(2/2)

Q402

RER

R458R458

JL701A

D14

Q707 74HC595

QD3

D713

SLR-332DU

D714

SLR-332DU

MD

TUNER

2SK246

Q411

D407

D408

P405A

POWER2

R460

10K

DATA

LAT

LC 12

OE 13

QE4

QF5

D715

SLR-332DU

L-1/DVD

L-2(CDR)

R445

1M

R446 1M

CLK

SELIN1

C723

103Z

SC 11

QG6

SLR-332DU

D716

C425

10/16

Q412 2SK246

C426

10/16

P401B

SELIN2E+5.6V

D717

TAPE

Tone bass

R443 1M

R447

1.2K C427

153

R449 100K

R444

1M

R448

1.2K C428

153

R450 100K

R

TO NADG-6630

LEDB

LEDA

SQH 9

VSS8

QH7 RES 10

SLR-332DU

NJM2068D-D

(1/2)

Q404

C408 47/50

NJM2068D-D

(2/2)

Q404

ERL

L

TO NADG-6630

C746 100/6.3

D746

R746

10K

+B2

R721

10K

C715 10/16

C407

47/50

R453 220K

R454 220K

-B2

R451 1K

C714 10/16

R452 1K

D709

Q415

RN1241

Q417

RN1241

Q416

RN1241

Q418

RN1241

C713 223Z

Q709

DTC124ES

JL501B

DTA114ES

Q710

DTC124ES