Sony WM-DDIII Manuale utente

WM-Dul

SERVICE

MANUAL

HEADPHONES

jacks

(stereo

minijacks)-

REW

►

(rewind)

button'

<*4

(fast

forward)

button

PLAY

button

■

STOP

button

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

"DOLBY”

and

the

double-D

symbol

□□

are

trademarks

Dolby

Laboratories

Licensing

Corporation.

Refer

MDR-15L

Service

Manual

issued

previously

for

informati

headphones

supplied

with

this

set.

AEP

Model

VOLUME

control

BATTERY

indicator

DOLBY

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.

min.

with

Sony

Cassette

C-60

Frequency

response

40-15,000

Wow

and

flutter

±0.13%

(DIN)

0.08%

WRMS

(NAB)

Power

output

Headphones:

20mW

{at

10%

harmonic

distortion)

load

impedance

ohms

operation

Outputs

Two

HEADPHONES

jacks

(stereo

minijacks)

load

impedance

8-300

ohms

Power

requirements

DC,

two

(size

AA)

batteries

jack

accepts:

EBP-500

battery

case

(optional)

for

use

two

R20

(size

batteries

AC-D2M

power

adaptor

(optional)

for

use

220

AC,

DCC-70

DCC-127A

car

battery

cord

(optional)

for

use

with

car

battery

(For

connection

with

the

DCC-127A,

the

optional

PC-200

plug

adaptor

required.)

Battery

life

Batteries

Continuous

playback

hours

Sony

batteries

SUM-3

(NS)

Approx.

Sony

alkaline

batteries

AM3

Approx.

For

maximum

performance

recommend

the

use

alkaline

batteries.

Dimensions

Approx.

79.7x110x32.8mm

(w/h/d)

(3V

inches)

incl.

projecting

parts

and

controls

Weight

Approx.

290

(10.3

oz)

incl.

batteries,

not

incl.

other

accessories

Note:

car

battery

cord

power

adaptor

not

manufactured

Sony

used,

fuse

must

installed

the

battery

cord

the

power

adaptor

and

the

polarity

the

plug

must

illustrated.

FEATURES

•

Disc

Drive

system

assures

accurate

and

stable

tape

trans¬

port,

greatly

reducing

wow

and

flutter.

•

Dolby

system

reduces

tape

hiss

noise.

•

Tape

selector

for

optimum

playback

with

standard

tapes

well

high-performance

tapes.

•

Two

HEADPHONES

jacks

allow

two

persons

listen

tape

playback

together.

STEREO

CASSETTE

PLAYER

WM-DD1

Replacing

chip

components

All

chip

components

should

connected

and

disconnect¬

ed,

using

tapered

soldering

iron

[temperature

the

iron

tip:

less

than

280°C

(536°F)],

pair

tweezers

and

braid¬

wire.

Precautions

for

replacement

not

disconnect

the

chip

component

forcefully.

Otherwise,

the

pattern

may

peel

off.

Never

re-use

disconnected

chip

component.

Dispose

all

old

chip

components.

protect

the

chip

component,

heating

time

for

attach¬

ing

the

component

should

within

seconds.

Removing

chip

components

(1)

emoving

solder

electrode

Remove

the

solder

the

electrode,

using

thin

braided

wire.

not

remove

the

solder

the

part

(chip

component)

attached

adjacent

the

electrode.

(2)

sconnecting

chip

components

Turn

the

tweezers

with

the

soldering

iron

alternately

applied

both

electrodes,

and

the

chip

component

will

disconnected.

Take

careful

precautions

while

disconnecting,

because

the

chip

component

force¬

fully

removed

the

land

may

peel

off.

Never

re-use

disconnected

chip

component.

(3)

moothing

the

soldered

surface

After

disconnecting

the

chip

component,

remove

the

solder

using

braided

wire

smooth

the

land

surface.

Connecting

chip

components

The

value

chip

components

not

displayed

the

main

body.

Take

due

precautions

avoid

mixing

new

chip

components

with

other

ones.

(1)

pplying

solder

land

one

side

Apply

thin

layer

solder

the

land

one

side

where

the

chip

component

connected.

Too

much

solder

may

cause

bridging.

Small

quart

tity

solder

(2)

peedy

soldering

Hold

the

chip

component

the

desired

position,

using

tweezers,

and

apply

the

soldering

iron

the

arrow-marked

direction.

protect

the

chip

compo¬

nent,

heating

time

should

within

seconds.

(3)

eedy

soldering

electrode

the

other

side

Solder

the

electrode

the

other

side

the

same

way

(2)

above.

SECTION

MECHANICAL

OPELATION

MECHANICAL

OPERATION

this

set

the

same

that

model

WM-DD,

refer

WM-DD

service

manual

previously

issued

for

MECHANICAL

OPERA¬

TION.

SECTION

DISASSEMBLY

Note:

the

disassembly

procedure

the

numerical

order

given.

WM-DDIK

WM-DDI

Cassette

Panel

Remove

cassette

panel.

Main

ard

Motor

precision

screw

1.4

1.8l

TYPE

WM-DDH

PRECAUTION

SECTION

ADJUSTMENTS

Clean

the

following

parts

with

denatured-

alcohol-moistened

swab:

playback

head

pinch

roller

capstan

Demagnetize

the

playback

head

with

head

demagnetizer.

not

use

magnetized

screwdriver

for

the

adjustments.

After

the

adjustments,

apply

suitable

locking

compound

the

parts

adjusted.

The

adjustments

should

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

3-1.

MECHANICAL

ADJUSTMENT

Torque

Measurement

Perform

with

2.5

power.

Torque

meter

Meter

reading

FWD

CQ-102C

g*cm

(0.3

0.63

oz*inch)

FF,

REW

CQ-201B

than

g»cm

(More

than

9.04

oz*inch)

Back

Tension

CQ-102C

3.5

g-cm

(0.01

0.05

oz«inch)

Tape

Pull¬

ing

Force

CQ-403

than

80g*cm

(More

than

11.12

oz*inch)

Pinch

Roller

Pressure

Adjustment

—

Playback

Mode

—

the

spring

scale

the

direction

shown

the

arrow.

return

the

pinch

roller

and

read

the

spring

scale

just

when

the

pinch

roller

starts

rotating.

XoX

Specification:

170±20g

(5.3

~6.7

oz)

Head

Height

Adjustment

Prepare

adjustment

cassette

shown

below.

C-120

tape

cassette

portions.

playback

mode

and

viewing

from

the

front,

adjust

the

head

heights

eliminate

tape

curl

and

tape

twist

portions

shown

the

arrow.

playback

head

3-578-138-01

(t=

0.1)

3-578-138-11

0.2)

im,

head

eigh

jus

tmen

necessary,

adjust

the

height

the

tape-guide

turning

the

adjustment

screw.

adjustment

screw

locking

compound

adjustment

screw.

WM-DDH

Motor

section

installation

Wow

flutter

and

motor

position

Adjust

with

the

adjustment

screw

that

rotor

thrust

play

within

0.1mm.

(When

confirming

play,

press

motor

down

that

the

motor

pulley

and

rotor

rubber

section

not

touch.)

Wow

flutter

adjustment

Setting:

Power

supply

voltage:

2.5V

Tape:

Adjust

using

end

portion

tape.

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

switch:

OFF

Procedure:

Mode:

playback

test

tape

wow

flutter

WS-48A

meter

(3kh

iz,

OdB)

32SI

—

L^J

set

-o

-°

HEADPHONES

Turn

the

adjustment

screw

that

the

wow

and

flutter

meter

reads

minimum

(less

than

0.12%

W-RMS).

(

)

power

supply

voltage,

confirm

normal

FWD

operation.

When

and

are

not

satisfied,

repeat

adjust¬

ment

again

starting

with

“Motor

Section

Installation”.

Press

down

2-2.

ELECTRICAL

ADJUSTMENTS

Tape

Speed

Adjustment

Setting:

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

switch:

OFF

Procedure:

Mode:

playback

test

tape

WS-48A

kHz,

OdB)

digital

frequency

counter

HEADPHONES

Open

the

solder

bridge

shown

below.

Turn

RV601

that

frequency

reading

be¬

comes

3090

Hz.

(at

the

ending

part

the

test

tape)

Resolder

the

adjustment

patterns

opened

step

above.

Now

frequency

reading

should

be¬

comes

3000

Hz.

Specification:

Digital

frequency

counter

3000

Adjustment

Location:

—

main

board

—

Adjustment

patterns

tc>rO

X60I

UL—C-—

i—

Playback

Head

Azimuth

Adjustment

Setting:

VOLUME

control:

mechanical

mid

TAPE

SELECT

switch:

NORM

DOLBY

switch:

OFF

Procedure:

playback

test

tape

P-4-A

UD/

32n

1—

set

—

—K

_Lj-i

HEADPHONES

urn

the

adjustment

screw

for

the

maximum

output

levels.

these

levels

not

match,

turn

the

adjustment

screw

until

both

output

levels

match

together

within

dB.

Screw

position

hase

Check

Mode:

playback

test

tape

P-4-A063

(6.3kHz,

—WdB)

L-CH

R‘CH

peak

32SI

oscilloscope

HEADPHONES

Screen

pattern

phase

45°

90°

5°

18(f

good

wrong

SECTION

DIAGRAMS

3-1.

MOUNTING

DIAGRAM

12.1*11

isIn-

®l

[MAIN

BOARD]

(SIDE

A)/

;

~18

~r\

Semiconductor

Lead

Layouts

MSM58141RS

BA3304F

NJM2063AM

Jill

TA7688F

CX20084

2SA812

2SC1623

2SB624-BV4

2SD596

2SB798

[MAIN

BOARD]

(SIDE

B}j

[MAW

BOARD]

SIDE

✓

[MAIN

BOARD]

[

COIL

koft

Veapth

S302

_J_J00LB]_NR

OFF

SR506D

RD7.5M-B1

Semiconductor

Location

Ref.

Descripti

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

parts

extracted

from

the

component

side.

parts

extracted

from

the

conductor

side.

part

mounted

the

conductor

side.

Through

hole.

component-side

pattern.

[RY

BATTERY

IZE

"AA"

{

DESIGNATION

R6)

WM-DDH

WM-DD1

3-2.

SCHEMATIC

DIAGRAM

te:

All

capacitors

are

juF

unless

otherwise

noted.

pF:

ppF

50WV

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

and

i/«W

less

unless

otherwise

specified.

nmi

Mi'infr

L-CH

signal

path

—

R-CH

signal

path

MNR-160IA

MOTOR

COIL

B+

bus.

adjustment

for

repair.

Power

voltage

and

fed

with

regulated

power

supply

from

Voltage

variations

may

noted

due

norma!

produc¬

tion

tolerances.

Waveforms

are

taken

ground

PLAY

mode

using

oscilloscope.

Voltage

variations

may

noted

due

normal

produc¬

tion

tolerances.

Switches:

Ref.

No.

Switch

Positi

S301

TAPE

NORM

S302

DOLBY

OFF

S901

POWER

Touching

the

No.

IC601

with

the

tester

probe

causes

extra

vibration

inside

the

1C,

which

will

heard

from

the

phones

high-pitched

sound.

the

No.

IC601

touched

with

the

tester

probe,

the

voltage

there

will

increase,

and

after

about

second

will

get

higher

than

0.8V,

that

the

motor

M901

will

stop.

BLOCK

DIAGRAMS

IC301

BA3304F

IC302

NJM2063AM

303

TA7688F

TIME

CONSTANT

feH-W-H

[-^-W-H^TiME

CONSTANT

WM-DDI

IC601

CX20084

IC602

MSM58141RS

6ND

4/5

SELECT

WM-DDD

SECTION

EXPLODED

VIEWS

AND

PARTS

LIST

REVISED

NOTE:

•The

mechanical

parts

with

reference

number

the

exploded

views

are

not

supplied.

•The

construction

parts

assembled

part

are

indicated

with

collation

number

the

remark

column.

Color

Indication

Appearance

Parts

Example:

(RED)

KNOB,

BALANCE

(WHITE)

Parts'

Color

No.

Part

No.

Description

Remarks

No.

Part

No.

Description

Remarks

X-3310-950-1

(SILVER)...PANEL

ASSY,

CONTROL

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

3-704-246-31

(SILVER).SCREW

(PI.4X2.5)

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

3-310-947-00

SPRING,

COMPRESSION

3-310-983-02

BUTTON,

LOCK

3-578-101-00

PLATE,

ORNAMENTAL

*3-701-999-00

LABEL,

SERIAL

NUMBER

HP*

-5"

324

435

(SILVER,RED)

...LABEL,

TH—not

supplied—

3-578-236-00

SPRING

(BATTERY)

.3-324-435-11

(BLACK).LABEL,

D(_,

not

supplied-

3-578-115-00

LID,

BATTERY

CASE

*3-324-430-01

(SILVER).LABEL,

MODEL

NUMBER

*3-324-415-01

CUSHION

*3-324-430-11

(BLACK,RED)...LABEL,

MODEL

NUMBER

3-578-114-00

PANEL,

CHASSIS

7-627-850-58

SCREW,

PRECISION

1.4X3.5

3-307-831-00

SCREW,

PANEL

3-324-431-01

KNOB,

VOL

3-335-797-21

SCREW

(Ml.4X3),

TOOTHED

LOCK

3-831-441-11

CUSHION

(B)

3-310-979-01

BUTTON,

SELECTION,

TAPE

9-911-838-XX

CUSHION,

METER

3-310-978-01

BUTTON,

SELECTION,

(DOLBY)

901

A-3216-178-A

BOARD

ASSY,

MAIN

9-911-816-01

CLOTH,

DRAWER,

BATTERY

3-831-441-XX

SPACER

3-703-710-01

STICKER,

SONY

SYMBOL

(12)

3-578-109-00

CONTACT

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