Sony WM-DDIII User manual

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1

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1

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WM-Dul

SERVICE

MANUAL

HEADPHONES

jacks

(stereo

minijacks)-

REW

►

►

(rewind)

button'

<*4

FF

(fast

forward)

button

<4

PLAY

button

■

STOP

button

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

"DOLBY”

and

the

double-D

symbol

□□

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

Refer

t

MDR-15L

Service

Manual

issued

previously

for

informati

n

of

headphones

supplied

with

this

set.

AEP

Model

VOLUME

control

BATTERY

indicator

DOLBY

NR

switch

-TAPE

selector

PHOTO:

BLACK

TYPE

SPECIFICATIONS

Similar

Mechanism

Set

WM-DD

Tape

Transport

Mechanism

Type

DD-tOO

Tape

track

4-track

2-channel

stereo

Fast

winding

time

Approx.

2

min.

with

Sony

Cassette

C-60

Frequency

response

40-15,000

Hz

Wow

and

flutter

±0.13%

(DIN)

0.08%

WRMS

(NAB)

Power

output

Headphones:

20mW

+

20mW

{at

10%

harmonic

distortion)

load

impedance

32

ohms

at

DC

operation

Outputs

Two

HEADPHONES

jacks

(stereo

minijacks)

load

impedance

8-300

ohms

Power

requirements

3

V

DC,

two

R6

(size

AA)

batteries

DC

IN

3

V

jack

accepts:

EBP-500

battery

case

(optional)

for

use

on

two

R20

(size

D)

batteries

AC-D2M

AC

power

adaptor

(optional)

for

use

on

220

V

AC,

50

Hz

DCC-70

or

DCC-127A

car

battery

cord

(optional)

for

use

with

12

V

car

battery

(For

connection

with

the

DCC-127A,

the

optional

PC-200

DC

plug

adaptor

is

required.)

Battery

life

Batteries

Continuous

playback

hours

Sony

batteries

SUM-3

(NS)

Approx.

4

Sony

alkaline

batteries

AM3

Approx.

9

For

maximum

performance

we

recommend

the

use

of

alkaline

batteries.

Dimensions

Approx.

79.7x110x32.8mm

(w/h/d)

(3V

4

x

4

%x

1

s

/

16

inches)

incl.

projecting

parts

and

controls

Weight

Approx.

290

g

(10.3

oz)

incl.

batteries,

not

incl.

other

accessories

Note:

If

a

car

battery

cord

or

an

AC

power

adaptor

not

manufactured

by

Sony

is

used,

a

fuse

must

be

installed

in

the

battery

cord

or

the

AC

power

adaptor

and

the

polarity

of

the

plug

must

be

as

illustrated.

FEATURES

•

Disc

Drive

system

assures

accurate

and

stable

tape

trans¬

port,

greatly

reducing

wow

and

flutter.

•

Dolby

NR

system

reduces

tape

hiss

noise.

•

Tape

selector

for

optimum

playback

with

standard

tapes

as

well

as

high-performance

tapes.

•

Two

HEADPHONES

jacks

allow

two

persons

to

listen

to

tape

playback

together.

STEREO

CASSETTE

PLAYER

WM-DD1

Replacing

chip

components

All

chip

components

should

be

connected

and

disconnect¬

ed,

using

a

tapered

soldering

iron

[temperature

of

the

iron

tip:

less

than

280°C

(536°F)],

a

pair

of

tweezers

and

braid¬

ed

wire.

Precautions

for

replacement

1.

Do

not

disconnect

the

chip

component

forcefully.

Otherwise,

the

pattern

may

peel

off.

2.

Never

re-use

a

disconnected

chip

component.

Dispose

of

all

old

chip

components.

3.

To

protect

the

chip

component,

heating

time

for

attach¬

ing

the

component

should

be

within

3

seconds.

o

Removing

chip

components

(1)

R

emoving

solder

at

electrode

Remove

the

solder

at

the

electrode,

using

a

thin

braided

wire.

Do

not

remove

the

solder

of

the

part

(chip

component)

attached

adjacent

to

the

electrode.

(2)

D

i

sconnecting

chip

components

Turn

the

tweezers

with

the

soldering

iron

alternately

applied

to

both

electrodes,

and

the

chip

component

will

be

disconnected.

Take

careful

precautions

while

disconnecting,

because

if

the

chip

component

is

force¬

fully

removed

the

land

may

peel

off.

Never

re-use

a

disconnected

chip

component.

(3)

S

moothing

the

soldered

surface

After

disconnecting

the

chip

component,

remove

the

solder

by

using

a

braided

wire

to

smooth

the

land

surface.

o

Connecting

chip

components

The

value

of

chip

components

is

not

displayed

on

the

main

body.

Take

due

precautions

to

avoid

mixing

new

chip

components

with

other

ones.

(1)

A

pplying

solder

to

land

on

one

side

Apply

a

thin

layer

of

solder

to

the

land

on

one

side

where

the

chip

component

is

to

be

connected.

Too

much

solder

may

cause

bridging.

Small

quart

tity

of

solder

(2)

S

peedy

soldering

Hold

the

chip

component

at

the

desired

position,

using

tweezers,

and

apply

the

soldering

iron

in

the

arrow-marked

direction.

To

protect

the

chip

compo¬

nent,

heating

time

should

be

within

3

seconds.

(3)

S

p

eedy

soldering

of

electrode

on

the

other

side

Solder

the

electrode

on

the

other

side

in

the

same

way

as

in

(2)

above.

-

2

-

SECTION

1

MECHANICAL

OPELATION

MECHANICAL

OPERATION

in

this

set

is

the

same

as

that

of

model

WM-DD,

so

refer

to

WM-DD

service

manual

previously

issued

for

MECHANICAL

OPERA¬

TION.

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

WM-DDIK

WM-DDI

Cassette

Panel

Q

Remove

cassette

panel.

Main

B

ard

Motor

precision

screw

P

1.4

x

1.8l

TYPE

3

-

3

-

-

4

-

WM-DDH

PRECAUTION

SECTION

3

ADJUSTMENTS

1.

Clean

the

following

parts

with

a

denatured-

alcohol-moistened

swab:

playback

head

pinch

roller

capstan

2.

Demagnetize

the

playback

head

with

a

head

demagnetizer.

3.

Do

not

use

a

magnetized

screwdriver

for

the

adjustments.

4.

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted.

5.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

3-1.

MECHANICAL

ADJUSTMENT

Torque

Measurement

Perform

with

2.5

V

DC

power.

Torque

meter

Meter

reading

FWD

CQ-102C

22

-

46

g*cm

(0.3

-

0.63

oz*inch)

FF,

REW

CQ-201B

More

than

65

g»cm

(More

than

9.04

oz*inch)

Back

Tension

CQ-102C

1

-

3.5

g-cm

(0.01

-

0.05

oz«inch)

Tape

Pull¬

ing

Force

CQ-403

More

than

80g*cm

(More

than

11.12

oz*inch)

Pinch

Roller

Pressure

Adjustment

—

Playback

Mode

—

1.

P

u

l

l

the

spring

scale

in

the

direction

shown

by

the

arrow.

2.

S

l

o

w

l

y

return

the

pinch

roller

and

read

the

spring

scale

just

when

the

pinch

roller

starts

rotating.

q

XoX

Specification:

170±20g

(5.3

~6.7

oz)

o

Head

Height

Adjustment

1.

Prepare

an

adjustment

cassette

as

shown

below.

C-120

tape

cassette

portions.

2.

In

playback

mode

and

viewing

from

the

front,

adjust

the

head

heights

to

eliminate

tape

curl

and

tape

twist

at

portions

shown

by

the

arrow.

playback

head

n

r

m

3-578-138-01

(t=

0.1)

3-578-138-11

ft

=

0.2)

Sh

im,

head

h

eigh

t

ad

jus

tmen

t

3.

I

f

necessary,

adjust

the

height

of

the

tape-guide

by

turning

the

adjustment

screw.

adjustment

screw

4.

A

p

p

l

y

locking

compound

on

adjustment

screw.

5

WM-DDH

1.

Motor

section

installation

2.

Wow

&

flutter

and

motor

position

1.

Adjust

with

the

adjustment

screw

so

that

rotor

thrust

play

is

within

0.1mm.

(When

confirming

play,

press

motor

down

so

that

the

motor

pulley

and

rotor

rubber

section

do

not

touch.)

2.

Wow

&

flutter

adjustment

Setting:

Power

supply

voltage:

2.5V

Tape:

Adjust

by

using

end

portion

of

tape.

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

NR

switch:

OFF

Procedure:

0

Mode:

playback

test

tape

wow

&

flutter

WS-48A

meter

(3kh

iz,

OdB)

32SI

-

1

—

1

L^J

set

J

1_

-o

-°

Vj

\

HEADPHONES

Turn

the

adjustment

screw

so

that

the

wow

and

flutter

meter

reads

minimum

(less

than

0.12%

W-RMS).

(

2

)

At

2V

power

supply

voltage,

confirm

normal

FWD

operation.

Q)

When

®

and

Q)

are

not

satisfied,

repeat

adjust¬

ment

again

starting

with

“Motor

Section

Installation”.

Press

down

6

WM

2-2.

ELECTRICAL

ADJUSTMENTS

Tape

Speed

Adjustment

Setting:

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

NR

switch:

OFF

Procedure:

Mode:

playback

test

tape

WS-48A

(3

kHz,

OdB)

digital

frequency

counter

\J

HEADPHONES

1.

Open

the

solder

bridge

shown

below.

2.

Turn

RV601

so

that

frequency

reading

be¬

comes

in

3090

Hz

±

10

Hz.

(at

the

ending

part

of

the

test

tape)

3.

Resolder

the

adjustment

patterns

opened

in

step

2

above.

Now

frequency

reading

should

be¬

comes

in

3000

Hz

±

9

Hz.

Specification:

Digital

frequency

counter

3000

Hz

±

9

Hz

Adjustment

Location:

—

main

board

—

Adjustment

patterns

I

O

1

^

tc>rO

X60I

M

mm

lu

UL—C-—

i—

7

1

T

Playback

Head

Azimuth

Adjustment

Setting:

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

NR

switch:

OFF

Procedure:

1.

M

o

d

e

:

playback

test

tape

P-4-A

WO

u

UD/

32n

LJ

L_

I

1—

set

1

i

%

|

—

—K

_Lj-i

-

U

HEADPHONES

2.

T

urn

the

adjustment

screw

for

the

maximum

output

levels.

If

these

levels

do

not

match,

turn

the

adjustment

screw

until

both

of

output

levels

match

together

within

1

dB.

Screw

position

3.

P

hase

Check

Mode:

playback

test

tape

P-4-A063

(6.3kHz,

—WdB)

L-CH

R‘CH

peak

peak

32SI

oscilloscope

HEADPHONES

Screen

pattern

0

@

®

in

phase

45°

90°

13

5°

18(f

good

wrong

8

SECTION

4

DIAGRAMS

3-1.

MOUNTING

DIAGRAM

I

I

1

1

l

I

3

I

..

4

I

5

1

6

12.1*11

1

^3

~T

_

14

isIn-

2

®l

[MAIN

BOARD]

(SIDE

A)/

17

;

~18

1

~

19

T

20

~r\

r

22

Semiconductor

Lead

Layouts

MSM58141RS

BA3304F

NJM2063AM

Jill

TA7688F

K

I

CX20084

2SA812

2SC1623

2SB624-BV4

2SD596

2SB798

C

[MAIN

BOARD]

(SIDE

B}j

[MAW

BOARD]

SIDE

A)

I

✓

[MAIN

BOARD]

FG

90

[

[

FG

COIL

koft

^

I

Veapth

j

b

I

ON

S302

_J_J00LB]_NR

OFF

SR506D

I

RD7.5M-B1

Semiconductor

Location

Ref.

N

.

Descripti

n

R

f.

No.

Description

D301

D-18

Q302

K-13

D302

J-15

Q303

0-10

D303

Q-10

Q304

P-10

D701

P-5

Q305

N-11

Q601

R-6

IC301

M-17

Q602

N-9

IC302

0-14

Q701

P-5

IC303

L-12

Q702

U-5

IC601

Q-7

Q703

Q-5

IC602

N-6

<3Hr-0

M90I

MNR-

1600A

MOTOR

4-'.-

/>*h

“i

^

>4

-

:

parts

extracted

from

the

component

side.

-

:

parts

extracted

from

the

conductor

side.

:

part

mounted

on

the

conductor

side.

:

Through

hole.

?:

component-side

pattern.

[RY

BATTERY

i

IZE

"AA"

{

EC

DESIGNATION

R6)

WM-DDH

WM-DD1

i

8

9

10

11

12

13

14

15

3-2.

SCHEMATIC

DIAGRAM

B

H

N

te:

All

capacitors

are

in

juF

unless

otherwise

noted.

pF:

ppF

50WV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

in

n

and

i/«W

or

less

unless

otherwise

specified.

nmi

mu

Mi'infr

:

L-CH

signal

path

—

:

R-CH

signal

path

11

MNR-160IA

MOTOR

FG

COIL

'

:

B+

bus.

I

:

adjustment

for

repair.

Power

voltage

is

3

V

and

fed

with

regulated

dc

power

supply

from

Voltage

variations

may

be

noted

due

to

norma!

produc¬

tion

tolerances.

Waveforms

are

taken

to

ground

in

PLAY

mode

by

using

oscilloscope.

Voltage

variations

may

be

noted

due

to

normal

produc¬

tion

tolerances.

Switches:

Ref.

No.

Switch

Positi

n

S301

TAPE

NORM

S302

DOLBY

NR

OFF

S901

POWER

ON

Touching

the

pin

No.

11

of

IC601

with

the

tester

probe

causes

an

extra

vibration

inside

the

1C,

which

will

be

heard

from

the

phones

as

a

high-pitched

sound.

If

the

pin

No.

11

of

IC601

is

touched

with

the

tester

probe,

the

voltage

there

will

increase,

and

after

about

1

second

it

will

get

higher

than

0.8V,

so

that

the

motor

M901

will

stop.

-

1

2

-

1C

BLOCK

DIAGRAMS

IC301

BA3304F

IC302

NJM2063AM

1C

303

TA7688F

TIME

CONSTANT

2

feH-W-H

[-^-W-H^TiME

CONSTANT

I

WM-DDI

IC601

CX20084

IC602

MSM58141RS

6ND

4/5

SELECT

3

-

WM-DDD

I

SECTION

5

EXPLODED

VIEWS

AND

PARTS

LIST

REVISED

NOTE:

•The

mechanical

parts

with

no

reference

number

in

the

exploded

views

are

not

supplied.

•The

construction

parts

of

an

assembled

part

are

indicated

with

a

collation

number

in

the

remark

column.

*

Color

Indication

of

Appearance

Parts

Example:

(RED)

.

KNOB,

BALANCE

t

(WHITE)

t

Parts'

Color

No.

Part

No.

Description

Remarks

No.

Part

No.

Description

Remarks

1

X-3310-950-1

(SILVER)...PANEL

ASSY,

CONTROL

15

3-578-232-00

(SILVER)...ORNAMENT,

ADJUSTMENT

HOLE

X-3310-951-1

(BLACK)....PANEL

ASSY,

CONTROL

3-578-232-11

(RED).ORNAMENT,

ADJUSTMENT

HOLE

X-3310-952-1

(RED).PANEL

ASSY,

CONTROL

3-578-232-21

(BLACK)....ORNAMENT,

ADJUSTMENT

HOLE

2

3-704-246-31

(SILVER).SCREW

(PI.4X2.5)

16

X—3310—953—1

(SILVER)...PANEL

ASSY,

CASSETTE

3-704-246-32

(BLACK,RED)...SCREW

(PI.4X2.5)

X-3310-954-1

(BLACK)....PANEL

ASSY,

CASSETTE

X-3310-955-1

(RED).PANEL

ASSY,

CASSETTE

3

3-310-947-00

SPRING,

COMPRESSION

4

3-310-983-02

BUTTON,

LOCK

17

3-578-101-00

PLATE,

ORNAMENTAL

18

*3-701-999-00

LABEL,

SERIAL

NUMBER

HP*

-5"

3

324

435

01

(SILVER,RED)

...LABEL,

TH—not

supplied—

20

3-578-236-00

SPRING

(BATTERY)

.3-324-435-11

(BLACK).LABEL,

D(_,

not

supplied-

21

3-578-115-00

LID,

BATTERY

CASE

6

*3-324-430-01

(SILVER).LABEL,

MODEL

NUMBER

22

*3-324-415-01

CUSHION

*3-324-430-11

(BLACK,RED)...LABEL,

MODEL

NUMBER

23

3-578-114-00

PANEL,

CHASSIS

24

7-627-850-58

SCREW,

PRECISION

+P

1.4X3.5

7

3-307-831-00

SCREW,

PANEL

25

3-324-431-01

KNOB,

VOL

8

3-335-797-21

SCREW

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TOOTHED

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9

3-831-441-11

CUSHION

(B)

26

3-310-979-01

BUTTON,

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TAPE

10

9-911-838-XX

CUSHION,

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27

3-310-978-01

BUTTON,

SELECTION,

NR

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901

A-3216-178-A

PC

BOARD

ASSY,

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11

9-911-816-01

CLOTH,

DRAWER,

BATTERY

12

3-831-441-XX

SPACER

13

3-703-710-01

STICKER,

SONY

SYMBOL

(12)

14

3-578-109-00

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