Sony MZ-R90/R91, MT-MZR70-165 service manual

MZ-R70

Common note on Schematic Diagram:

•All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

•All resistors are in Ω and 1/4 W or less unless otherwise specified.

•% : indicates tolerance.

•f : internal component.

•C: panel designation.

Note:	Note:
The components identi-	Les composants identifiés par
fied by mark 0or dotted	une marque 0sont critiques
line with mark 0are criti-	pour la sécurité.
cal for safety.	Ne les remplacer que par une
Replace only with part	piéce portant le numéro
number specified.	spécifié.

•A: B+ Line.

•Power voltage is dc 3V and fed with regulated dc power supply from external power voltage jack.

•Voltages and waveforms are dc with respect to ground in playback mode.

no mark : REC

( ) : PB

∗: Impossible to measure

•Voltages are taken with a VOM (Input impedance 10 MΩ ). Voltage variations may be noted due to normal produc- tion tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc- tion tolerances.

•Circled numbers refer to waveforms.

•Signal path. J : CD

Common note on Printed Wiring Boards:

•Y: parts extracted from the conductor side.

•f : internal component.

• : Pattern from the side which enables seeing.

Caution:

Pattern face side: Parts on the pattern face side seen from the

(Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the

(Side A) parts face are indicated.

•Main board is four-layer printed board.

However, the patterns of layers 2 and 3 have not been in- cluded in this diagrams.

*IC502, IC801 is not replaceable

• Lead Layouts surface

Lead layout of conventional IC CSP (chip size package)

6-4. PRINTED WIRING BOARD — MAIN BOARD —

1

2

3

4

5

6

7

8

9

10

11

A

MAIN BOARD

(SIDE A)

S801

S802

(OPEN/CLOSE)

(OPEN)

B

C

D

IC504

IC505

FB601

AP530

X501

FB505

RB603

C624

RB602

TP344

TP343

TP904

L604

8

5

8

5

TP315

C638

20

15

C623

1

4

1

4

25

C514

C625

TP333

C113

C527

C510

10

C629

30

IC601

C640

C621

C303

R307

TP331

TP334

TP341

R524

5

L601

E

R619

R321

R302

TP335

TP342

R525

R636

C632

35

40

45

481

C304

C220

TP332

J301

C534

C528

L301

C616

C631

C222

R204

(1/2)

C617

AP5101

TP5112

C536

R104

LINE IN

R526

R520

R201

(OPTICAL)

R528

C535

C618

CN501 1

L501

C120

R325

R522

R638

AP5102

TP346

TP345

F

C308

R202

C122

C202

TP336

TP337

TP5105

TP348 R102

C203

TP338

OPTICAL

10

C307

D101

D201

PICK-UP

C525

C524

C913

R101

C103

C102

TP5120

C925

R301

C334

C917

L901

TP347

C333

R322

TP5118

D905

20

L902

TP903

R808

R811

R834

R835

R814

G

R802

R803

R805

R840

R806

R815

AP5119

C106

R809

R936

R923

C915

C201

R813

R812

R921

L903

R209

R223

C810

C926

R934

R912

TP816

TP914

R919

R203

R208

TP317

R807

C206

AP808

C910

TP905

R801

R838

TP915

C929

D907

TP9001

R937

R924

R913 C918

L905

D906

AP909

AP910

TP801

R929

R931

C932

C933

TH901

LF901

TP906

H

TP828

R938

C922

C923

C930

TP311

C934

S803

J304

C605

R942

C921

C935

R930

R907

TP312

T.MARK

C612

R928

R927

L904

C902

TP313

(1/2)

L606

R637

R611

R908

TP316

i 1

TP601

C905

TP314

(LINE OUT)

D601

R614

R612

TP823

D602

R639

I

C600

Q905

R613

C602

1

8

L603

C613

C614

C601

Q603

R903

C615

D600

4

5

1-677-124-

11

04

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