Sony TC-WR720A Service Manual - Page 14

5-4.

SCHEMATIC

DIAGRAM

-AUDIO/POWER

SECTION

-

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

I

16

I

17

18

19

20

I

21

22

23

24

25

26

•

IC

Block

Diagrams

IC5O6

MC14053BCP

BI

VDD

BO

o

B.COM

Cl

A.COM

C

.

COM

CO

I

NH

VEE

VSS

X4

X6

COM

X7

X5

I

NH

VEE

VSS

2

3

4

5

6

7

B

OPEN

OPEN

OPEN

16

15

14

13

12

11

10

9

IC510

MC14051BCP

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

VDD

X2

XO

X7

X3

A

B

Al

AO

Note:

•

All

capacitors

are

in

μF

unless

otherwise

noted.

pF:

μμF

50WV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums.

•

All

resistors

are

in

n

and

V.

VV

or

less

unless

otherwise

specified.

•

fusible

resistor.

Note:

The

components

identi-

fied

by

mark

lor

dot-

ted

line

with

mark

are

critical

for

safety.

Replace

only

with

part

number

specified.

Note:

Les

composan,ts

identifies

par

une

marque

Z1\

sont

critiques

pour

la

securite.

Ne

les

remplacer

que

par

une

piece

portant

le

numero

speci

fie.

•

I-

1:

adjustment

for

repair.

•

Voltage

is

de

with

respect

to

ground

under

no

-signal

conditions.

no

mark:

POWER

ON

•

:FWD

:REV

:

FF

M

:

REW

:

REC

•

Voltages

are

taken

with

a

VOM

(Input

Impedance

10M

Q).

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances.

•

Signal

path.

:

PB

(DECK

A)

D)

:

REC

(DECK

A)

E>

:

PB

(DECK

B)

ID)

:

REC

(DECK

B)

A

B

C

D

E

G

H

J

K

L

M

N

0

[NX

-

PRO

BOARD(A)]

00

.

1

C03921

C

3

02

0

2

a

i

s

,

30•

I

,

50391

[

054

,

1

•

27.11

124

6

7

3

5

0

o-19

50491

L

2

9

71W

128

ICO691

DOLBY

HX

PRO

0395

2200

C0393

630V

0.0012

1111394

1

pm

58

REC

LEVEL

LI

500391

22k

RVO49

00694

228

0.

7r

RI

95

'50495

2

2

REC

LEVEL

IR/

74

CC

76

4

-7

4

1

W4

R0494

00692

159

4x

10

7

4

•

6

7.

7.4

MP

A850

PEAK

CA

MP

6.7

5-73

-7.4

3

7.6

48:

7.5

VCA

7.4

oNo

OMER

R0393

3

10

.97g93

76

-5.7

4.70

5000

24.9.

•

io

11

TP3691

C0494

loop

530V

•

0

•

CN0691

80492

1506

C9403

--4

C0495

22C•

630V

WR

720

r

TO

SWIA1

BOARD

11/3

P

144

AI

-I

POWER

OFF

-•-ON

21

IA

3

4

<AU

7.59)-

<0047.51)

TO

AUDIO

SYSTEM

CONTROL

BOARD0/2)

CN5

0

03

(DECK

A)

CRP0691

E

MODEL

WR72

OA

•E

NOT

REPLACEABLE

,

BUILT

IN

TRANSFORMER.

A.S702

VOLTAGE

SELECTOR

w—vr

2

I

r

I

I

I-I

AEP,

WG

MODEL

6

5

4

T7011

POWER

TRANSFCRIYE

2

./f

NOT

REPLACEABLE.

BUILT

IN

TRANSFORMER'

5

4

T701

POWER

I

I

TRANSFORMER

3

2

7

C

IN

(.1

TO

AUDIO

SYSTEM

CONTROL

BOARDII/21

SYSTEM

CONTROL

SECTION

[TRANSLATION]

BOARD(A)

W

R

720

A

US,

Canadian

MODEL

[POWER

SW1

TOWER

SW

1

BOARD

I

BOARD

II

2

)BOARD(I/

3)

43

0 0 0

0

4

2

POWER

IN

—<

POWER

-

OUT

4

—

<2,

AU

4

750

—

,

201>

VF

.r<7>

—

•

—

or

TO

AUDIO

SYSTEM

CONTROL

80ARDII/2)

SYSTEM

CONTROL

SECTION

Cy

v

7

I

0701

POWER

A

-

2

OFF

-N.0

e

5

CN7D2

O

0 0 0

2

1

3

I I

ii

CN704

01170

I

I '

AC

IN

T

701

A,

POWER

TRANSFORMER

9

8

1

•

NOT

REPLACEABLE

BUILT

IN

TRANSFORMER

I

POWERT

BOARD

I

4

-

0705

REC

OUT

R

RE0

OUT

L

(Al

LINE

MUTE

A

REC

MUTE

DOLBY

B./B

DOLBY

ON/OFF

PS

-

77

REG/

PE

I I

IC701

-17.50

REG

POWER

<28

(DECK

Al

o

o

0

C9501

R0902

-

511901

BALANCE

(A047.5V)

3595

510

1

84

J301

—LINE

IN

I

C9601

c

50

L

)

--

±

R

2

7

2

7

,

2

REC

LEVEL

501

y

-L

501

>

)

T

.

J

im

.

r

PANEL

1,

!

'BOAR

DO/34

1_

1

--

WR720

A

•

LINE

OUT

9172

]

15513

1

27

S.

0.7

14,.,•

1

-

04

I

R59I

220

qr

C59I

+

I0004

IN

0171

2501012

4

7

31

1.24

0

-

1_

0181

0

0,F

5-

IC601

HEADPHONE

AMP

.7.6

IC601

(1./.21

9521

SAP

7

I

W1

IOU

4.6

3172

•

4

'

7

0271

2501011

R274

20

4

4

5

1

7

3

1

45

572

25

0

41317

45

4.5

39

0

/.:-0.3

R59X

*

/0,44

:4.7

13:1

<AU

7.56>

•

MUTING

91

DRIVE

'

57

0171,

271

MUTING

0.7

. -

0.4

-

71

2rT

4

)

—

▪

104

[HP

BOARD]

0

IC601

11/21

95216AP

CN505

1

%00274

I

5

_

_

_J

J50

PHONES

IC551

REC

Es

L

EI

DECK

A

S.

7.6

27

.

12'

<17>

21>

<

20)-

<

IV>

<16>

(<2

C221

I.

;8I1

0

6

AUDIO

SYSTEM

CONTROL

BOARD

(1/2)

MC

14053

C

B

A

ON

L L L

L

H

H

TI

L L

H

H

H

CB'

BR

AO

CM

DI

Al

Cl

B.3

Aid

CI

BI

Al

050)

PB

EO

SWITCH

PB

E0

7.6

61501

SA1

7

-C

R721

104

56

1

,

0>

FIEM

01

1,

•

•

•T5

2

996

-.

-<9>

A

5.8

0702

2502603

0701

2501761

A

8702

2.24

F7

701

I

SEMN

0705

2591187

3.2

<AIJ47.5v>

1.60/1250

US,Cono

d

Ian

MODEL

1

-

1.60/2500

AEP,WG,E\

MODEL

)

1.1

8706

0707

104

10E2N

fi

eVo

25V

6.4

C713-

0

022

#707

220

76

R708

I

-

ak

IC701

(I/2)

8

004558P

12.6

13.2

2,5

, ,

12.6

7

0706

250343

R709

5.68

25

0759

25

47

• I

0

1

1

721

,

1

-

0710

2.79

0710

IDIOM

10V

7.

IC506

REC

00

SWITCH

,40R0130CP

Eff

111.COM

CI

A.00

COM

Al

AZ

H

A

VEE

SOS

5191

By

7.5

0502

_

REC/PB

ON/OFF

SWITCH

•

1

7

AEC/

PB

D

K

o

A

R,5a

,

11,LI17.6

WR720

-1

0503

05°3

I

col.

BY

SAI45

ow/OFF

N.124

•

m

D

5614--

1

NI

"

-4.

32T

0

65132T

I

''

H-71FX

L-PB

B/0

7.5m

C

.

0

Q504

DOLBY

8/C

7.6

0504

2541345

-7.4

R505

8

-

T

f

c

,

B

0

C

.6

7.5

1

4

1

0503

UZL9L2

wR720

C222

lOr

500

7.6

DECK

A

•

•.

0

7.6

0521

2541340

MUTIN9

SWITCH

3552

1197.21

108

IREC

GA

I

NI

7.6

-T6

1.2

R539

248

OL

13

C542

2.20

50v

5541

100k

112

:

3!

VA

A

DECK

A

0221

2501012

1C224

0

47

50V

R224

56k

1)246

axx

0.7

DECK

A

RI2I

2561612

4

7k

CI

24

0

47

T

Rj2E

500

*

ISO

'YOV

!REG

GAIN

RI24

5.6k

<a

.

*

19

4-0.--

R533

3004

R521

824

R027

2104

1/0

8

6

5

2

3

OP

R536

364

7-5

0121,221

MUTING

11522

758

R523

1304

0

VA

R524

62k

•

44A

9525

27t

9528

624

R529

1508

R530

1304

R

3

5

6

3

%

1

9532

47k

00

25

L

2

0:3

y

0

3

5

9

s

9

WiTCH

R507

1004

0506

CIOI

0.022

11

WR720A

0

R29

1.44

7.6

DECK

E1..

7

6

DECK

B

0,*0

YA

RII9

Elm

2.24

14

500

IC501

DOLBY

NR

'

4

2

.1?

C

5

1

0

,1

0

I

VA

)

1

:

7101

EN;

P

.01J

OS

HP

.061

6Z

0.022

-0.6

7

•

0713

6L

-280

—(6,

.UZL7HI

•

xcik

,

-31.9

6j

377

0704

2521187

Au

-7.5V

—<26>

ANIS

SELECT,i5,

PB

*

SELECT

AIR

[H

X

-PR

0

BOARD

(B)]

0703

2501317

.4

-

33

f

r-31.5

0704

220r

504

0703;704

-2811

PEG

0703

10E28

8735

4.7%

-0

710

10024

-0

711

I0E211

0708

2503399

0712

OZL6LI

er,

6

'

n

2

7

2

'

0

11

-13.5

<AU

7.59>

-7.5

4

'3

0707

2501761

-74

0706,

708

R7

POWER

SWITCH

±

IC701

0/21

RC45581

,

0707

-7.5V

REG

R715

108

-

<AU

7.50>

I0„,

Si2

2

1

W)

—

6306

—

77

~

F391

°V

,;

,a/r8

T

7

1

,

(

4r

.

R491

270

128

0

11394

IC691

DOLBY

HX

PRO

0393

0.0012

7391

C398

0396

0.014

0.Ir

REC

LEVEL

/

07391

224

C604

229

9

7

3

4" .

4

.4.

'

7.4

REG

7.6

4

-74

1

.7

0'

,

,

Fi

g

<

.7

3

ET

06

•

•

-

75

-

7.3

7.4

1

7.4

COMP

ABSO

PEAK

OMP

.3

GNO

RE

08038

RT3333

8403

COI

_5

4.70

7.6

5COP

-

•:7.5

o

4324

T

C394

'

08

62R

•

5392

150%

0494

1009

0492

545,

_

630V

1509

♦

•

01

404

T

-1-1

7,

4

0

9

Ci

aI

I2

0

0

N691

•

ROC

LEVEL

R

(AU

7.510

—

TO

AUDIO

SYSTEM

CONTROL

BOARD11/21

CN504

PRPEIO

I

RECORD

,

PLAYBACK/

ERASE

HEAD

L

-C

R

-CH

X

MD(C)

BOARD

IS

FOR

COMMON

DECK

A

AND

DECK

B,

ONE

SIDE

OMITTED.

I

EMDICI

BOARD(

I/2)]

IC31

PB

EQ

AMP

CNP32

220

.

1

,

C

c

3

,

1

5

1

,

1

6,

/

,

21

,

Eu_

REC

2

75

C13

224

25V

A

RI

3

1308

36

8

II

O

'

022

1214

5.64

PB

LEVEL

IL

033

+

330

16

1

/

0

PB

0

REC

C22

R24

0.022

5.6k

I

7

1

7

IC31

11/2/

070457

C-

07

C

23

'

2

25V

7.3

13:1

PB

LEVEL1131

R32

220

ERASE

40

IDECk

0

T,NpP,"

[TRANSLATION'

LBOARD

CB)

J

lo

-7

250345

031

•.7.6

ISSI327

_

7

,

L.•

02

0

01

B

51

.8

4

'

17

'

6

300

,-,

60

C55

0.022

-CA

7.510-*

R52

I:

13.i

C52

00022

1000

6.9

410"

-

8

3

C5I

0.0022

100V

051

15C945

258IP

-34

T

4

•

•

7.

(El

7.6

•

6

9

R55

ION

<AU

7.50-

053

BIAS

REG

0

CNP3I

(DECK

EU

011-70e

OFF

-120

e

.0

OECKA

6

0201

0'

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2503901

3,D7:

0101,201

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SWITCH

•

R202

2209

,

s0.

20

co

—

e

4

I

82

1

Ili

\WR720

0102202

\NR720A

12

13:1

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7.50

D

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11502

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ID>

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6

8

DE

LLS

TILS

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7.4

8

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RE

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6.5

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0

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R133

2

28

R173

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311

C109

474

100

7A

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IT

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<AU

7.545

IC509

REC

EQ

0551

0552

553

MUTING

SWITCH

REC

MUTING

0251

iO4

50V

0

4

6

1

1

:

(-----•

•

C209

470

10V

0.4

CI

5

lOr

50V

2.7085)

.

•

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107

1

5

0

04

13273

13k

5

NA

•

3233

2.

28

<41147.50>

IC503

AMP

IC504

METER

AMP

C60I

2.2,

0.1

7.6

IC50311/2/

FIC45585

1.4

3602

11604

2215,

009

7

0000

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IC504

II/2/

7

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6

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80

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14)5

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21

0131

3..3r

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3

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0.1..0)MS),

44

1914087.6

7.50)

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3

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4

22k

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0231

155132T

14

1

10504

1

1/21

4

RC455F3P

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AM

S/ITS

SELECT

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HIGH-PASS

FILTER

C252

IPA

500

3587

26k

0

•

DECK

B

•:

7.6

9

7

6

0551

2341348

76

DECK

B

•

:

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I

N

5

1

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,

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7

A

50

2

8r

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0

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10

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1,19

,

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0.47

509

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5.6k

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9

1151

4.78

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2.289

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2001012

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1

31

1

44

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1204

f

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R583

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7.50

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AL

GH

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R

5

In

0

0

1

.

5

4

4

7

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108

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W'

A687.57

IC510

REC

ES

SWITCH

DECK

5

'

5.2

4-50-

R569

9570

R57I

R572

I

109

368

628

Ass

R575

1

10k

8551

82k

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220k

R563

3006

R573

R574

0

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sax

R576

R577

478

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R579

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R558

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d

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R562

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15

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566

R567

R568

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1.3

13

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0

5

2

NORM

.

7.

6

7.4

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R2

NPN

PRP

10K

108

1

g,'::',

M

21

10

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1

1::::,

471(

4,K

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I2503399,

12561345,

RAILS?

BRIL32

''

-

(20039011

(25915111

R720

WH720A

WR720

WR720A

R554

75k

28

R572

43k

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33M

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36k

R574

3_61

R575

47

k

R579

R556

R561

R56

2

R566

R567

30L

43k

56k

39k

5Ik

62k

R584

R585

R586

22%

43k

50k

27k

62k

394

36k

30k

18k

36k

43k

20k

56k

36k

51k

DECK

B

I

0

DECK

B

MC14051

C

A

ON

141

1.2

Ix

1

1,

12

TE

41

V

42

I-1

L L

L

L L

H

H

L

L

H

L

H H H

L

H H

X4

50

56

52

X7

X3

DECK

8

Di.

0

I

Ifffilt1

-

-T

5

IK)

AUDIO

SYSTEM

CONTROL

BOARD11/21

SYSTEM

CONTROL

SECTION

WR

720

[E

17BOARD]

•

0

IC601

HEADPHONE

AMP

LEVEL

00503

IC60111/fl

a

i

0

A

3

k

1

CA;

0

M52I8AL

.

_

.

C

47

/

2

_

2

25V

°,

8

0

160

20k

Rg

81y3

2.2k

22k

R282

0

R283

224

.2k

20k

0

4.

5

+

C281

4

nig

A

R284

220

1C6011

I/2)

+C593

M52

IBAL

WR720

r

-

- - -

R0501

BALANCE

R

EC

LEVEL

50

50k

•

J50I

PHONES

50k

509

rPANEL

LBOARD(

I/2)1

i

I

-19--

-20-

-21-

-22

Sony TC-WR720A Service Manual - Page 14

Muting, Drive, T,npp, Translation, Lboard

Page 14 highlights