Sony MDR-IF120 User manual

MDR-IF120/1F120K

SERVICE

MANUAL

US

Model

Canadian

Model

AEP

Model

UK

Model

E

Model

Australian

Model

MDR-IF120

“oe

TMR-IF120

MDR-IF120K

is

Composed

of

the

following

models.

SPECIFICATIONS

COMPONENT

MODEL

NAME

FOR

MDR-IF120K

_

General

.

Modulation

system

Frequency

modulation

Cordless

Stereo

Headphones

MDR-IF120

Carrier

frequency

—

Right

2.8

MHz

|

Transmitter

|

TMR-IF

120

|

ie

330001

Transmitter

IMR-AF120

Frequency

response

18

—

22,000

Hz

Transmitter

For

Cordless

Stereo

Headphones

(MDR-IF120),

only

the

Power

source

DC

IN

9V

jack

accepts

power

supplied

following

parts

are

for

service.

’

from

the

AC

power

adaptor

for

use

on

wou

the

following

voltages:

Parts

No.

Description

eee

4-979-830-01

LID,

BATTERY

CASE

:

,

Where

purchased

Operating

voltage

4-979-838-01

PAD,

EAR

P

owes

U.S.A.

/Canada

120

V

AC,

60

Hz

U.K.

230

-

240

V

AC,

50

Hz

European

countries

220

-

230

V

AC,

50

Hz

Australia

240

V

AC,

50

Hz

Other

countries

110

—

120

V/220

~

240

V

AC,

50/60

Hz

Audio

input

Phono

jacks

/

stereo

mini

jack

Dimensions

Approx.

152

X

40

X

72

mm

(6X

1"

X

2%

in.)

(w/h/d)

Mass

Approx.

80

g

(2.8

02.)

Headphones

Power

source

DC

1.5

V,

1

X

R6

(size

AA)

battery

Mass

Approx.

135

g

(4.8

oz.)

including

battery

Design

and

specifications

are

subject

to

change

without

notice.

CORDLESS

STEREO

HEADPHONES

SYSTEM

SONY.

ae

eee

eres

2

If

your

AC

power

Setting

up

the

transmitter

1

Connect

the

transmitter

to

audio/video

equipment.

Select

one

of

the

hookups

below

depending

on

the

jack

type:

@

To

connect

to

LINE

OUT

or

REC

OUT

jacks

Transmitter

Connecting

cord

(supplied)

Left

{

}

channel

f}

fi

(white)

°

toLINEOUT

{66

or

REC

OUT

=

Stereo

system,

TV,

VCR,

etc.

(red)

®)

To

connect

toa

headphones

jack

Transmitter

y

Left

channel

(white)

Right

channel

(red)

Connecting

cord

(supplied)

mini

jack)

Unimatch

plug

|

adaptor

(not

to

a

headphones

supplied)

jack

(stereo

:

S

to

a

headphones

;

Discman,

jack

(stereo

WALKMAN,

TV,

phone

jack)

-

VCR,

etc.

SECTION

1

GENERAL

adaptor

is

equipped

with

a

voltage

selector,

before

connecting

the

AC

power

adaptor

to

an

AC

outlet,

set

it

to

the

operating

voltage

in

your

area

with

a

screw

driver.

AC

power

adaptor

(supplied)

220V=

240V

NOV

120V

.

Vf

faGE

s¥

{CTOR

3

Connect

the

transmitter

to

a

power

source.

Transmitter

==>

to

an

AC

outlet

to

DC

IN

9V

jack

AC

power

adaptor

(supplied)

Notes

*

Do

not

connect

to

the

AUDIO

IN

A

jacks

and

B

jack

at

the

same

time.

If

you

do

so,

the

audio

signals

may

be

mixed.

¢

Use

only

the

supplied

AC

power

adaptor.

Do

not

use

any

other

AC

power

adaptor.

i

~

“\@

Polarity

of

the

plug

¢

If

the

plug

of

the

AC

power

adaptor

does

not

fit

in

the

AC

outlet,

use

the

supplied

AC

plug

adaptor.

¢

When

you

connect

the

connecting

cord

directly

to

an

earphone

jack,

the

audio

signal

will

not

be

output

through

the

right

channel.

In

such

a

case,

use

the

separately

sold

PC-236HG

plug

adaptor.

*

WALKMAN

is

a

registered

trademark

of

Sony

Corporation,

This

section

is

extracted

from

instruction

manual.

a

Setting

up

the

headphones

1

Open

the

battery

compartment

lid

on

the

left

inner

side

of

the

headband.

2

insert

one

R6

(size

AA)

battery

by

matching

the

+

and

-

on

the

battery

to

the

+

and

—

in

the

battery

compartment.

3

Close

the

battery

compartment

lid.

Battery

life

Battery

Approx.

hours

Sony

alkaline

battery

100

AM3

(N)

Sony

battery

50

SUM-3

(NS)

When

to

replace

the

battery

Replace

the

battery

with

new

one

when

the

POWER

indicator

dims,

and

a

hissing

noise

increases.

i

RE

Eire

a

|

Listening

to

a

program

1

Turn

on

the

audio/video

equipment

connected

to

the

transmitter.

2

Turn

on

the

transmitter.

The

infrared

emitters

light

up.

3

Turn

on

the

power

of

the

headphones.

The

power

indicator

lights

in

red.

L

ie

yet

|

4

Put

on

the

headphones.

Mute

function

If

a

hissing

noise

is

heard

when

the

infrared

rays

are

obstructed,

or

the

headphones

are

used

outside

of

the

effective

range

(see

the

mute

function

will

be

activated

and

the

sound

will

not

be

heard

from

the

headphones.

To

restore

the

sound,

move

nearer

toward

the

transmitter

or

remove

the

obstruction.

After

listening

to

a

program

Take

the

headphones

off

before

turning

off

the

headphones

and

the

transmitter.

Otherwise

you

may

hear

some

noise

when

the

infrared

rays

are

suddenly

cut

off.

Note

The

infrared

emitters

light

up

when

the

transmitter

is

turned

on.

The

brightness

of

the

emitters

may

not

be

uniform,

however,

this

is

nota

malfunction.

i

age

Hy

[ee

er

ee

eee

eae

eee

The

effective

areas

of

the

transmitter

The

illustration

below

shows

the

approximate

area

covered

by

the

infrared

rays

emitted

from

the

transmitter.

Transmitter

Infrared

ray

Approx.3m

2

(1187/,

yee

[\

>

a

euaaoe

(118'/,

in.)

Notes

¢

If

you

use

the

headphones

at

too

great

a

distance

from

the

transmitter,

you

may

hear

a

hissing

noise

and

if

there

is

an

object

between

the

receiver

and

the

transmitter,

the

sound

may

be

interrupted.

These

phenomena

are

inherent

to

infrared

ray.

communication

and

do

not

mean

that

there

is

a

problem

with

the

unit

itself.

¢

The

infrared

rays

will

not

penetrate

walls

or

opaque

glass,

therefore,

be

sure

to

stay

within

sight

of

the

transmitter.

¢

When

you

use

the

headphones

inside

the

area

illustrated

in

the

diagrams,

the

transmitter

can

be

placed

in

the

front,

behind

or

by

the

side

of

the

listener.

Se

a

eee

ee

Precautions

¢

The

CE

mark

on

the

unit

is

valid

only

for

products

marketed

in

the

European

Union.

¢

When

the

headphones

is

not

to

be

used

for

a

long

period

of

time,

remove

the

battery

to

avoid

damage

caused

by

battery

leakage

and

subsequent

corrosion.

¢

When

the

transmitter

is

not

to

be

used

for

a

long

period

of

time,

disconnect

the

AC

power

adaptor

from

the

AC

outlet

holding

the

plug.

Do

not

pull

on

the

cord.

¢

Do

not

leave

the

cordless

stereo

headphones

system

in

a

location

subject

to

direct

sunlight,

heat

or

moisture.

¢

The

nameplate

indicating

operating

voltage,

power

consumption,

etc.,

is

located

on

the

bottom

of

the

AC

power

adaptor

(European

models

only).

Notes

on

headphones

Preventing

hearing

damage

Avoid

using

headphones

at

high

volume.

Hearing

experts

advise

against

continuous,

loud

and

extended

play.

If

you

experience

a

ringing

in

your

ears,

reduce

the

volume

or

discontinue

use.

Caring

for

others

Keep

the

volume

at

a

moderate

level.

This

will

allow

you

to

hear

outside

sounds

and

to

be

considerate

to

the

people

around

you.

If

you

have

any

questions

or

problems

concerning

the

system

that

are

not

covered

in

this

manual,

please

consult

the

nearest

Sony

dealer.

Be

sure

to

bring

the

headphones

and

the

transmitter

to

the

Sony

dealer

when

requiring

repair

work.

a=

SECTION

2

ELECTRICAL

ADJUSTMENTS

Note:

1.

The

adjustments

should

be

performed

in

the

order

given.

2.

The

adjustments

and

measurements

should

be

performed

for

both

L-ch

and

R-ch

unless

otherwise

indicated.

3.

L-ch

adjustment

should

be

completed

before

performing

R-ch

adjustment.

OSCILLATING

FREQUENCY

ADJUSTMENT

Connection:

frequency

counter

TX

board

TP

(CL54)

(L-ch)

es

TP

(CL04)

(R-ch)

<———p+

Adjustiment

procedure:

No

signal

state.

1.

Connect

the

frequency

counter

to

TP

(CL54)

(L-ch)

and

TP(CL04)

(R-ch).

2.

Adjust

with

L51

(L-ch)

and

LO1

(R-ch)

so

that

the

reading

on

the

frequency

counter

becomes

the

specified

value.

Specified

Value:

L-ch

L51

2.3MHz+2kHz

R-ch

LO1

2.8MHz+2kHz

Connection

and

Adjustment

Location

OSCILLATING

FREQUENCY

adjustment

LO1

(R-ch)

L51

(L-ch)

-TX

board

—

(Conductor

side)

regulated

dc

power

supply

9

Ls

7

PL

MDR-IF120/IF

120K

SECTION

3

DIAGRAMS

¢

Semiconductor

3-1.

PRINTED

WIRING

BOARD

(INFRARED

EMITTER)

Location

Ref.

No.

|

Location

Note:

*

o——

‘parts

extracted

from

the

component

side.

¢

[

_

:

indicates

side

identified

with

part

number.

:

Pattern

from

the

side

which

enables

seeing.

MDR-IF120/IF

120K

3-2.

SCHEMATIC

DIAGRAM

1

2

3

4

5

6

7

8

g

10

11

12

13

A

[TX

BOARD]

J03

CLS

cL!s

=

l

23-26

(INFRAREG

EMITTER)

a

y)

BALSBIS

R67

£25

B

2700

PALSBIS

;

Q51

Q02,

52

i

R61

2SC266BY

LEA

ARIVER

526

AUDIO

IN

390k

(cu

osc

DAL5815

an

el

057

re

3

i

a2

47

as2_

2.7

2503377

yh

in

()

2803377

R58

.

Ss

i

1

T

R42

|

0

C

(Hie

100

A

tal

B51

SVC203SPA

2SAt175

cLs5

@

BUFFER

J01

I

|

D

822

903

ROS.

Fiona

osteo

BUFFER

I

J04

o-E

4

«2

BC

IN

QV

001

SVC2035PA

$0!

“921

25017408

|

E

as

,

.

SCoREBY

j

a

2

4.

>

.

R-CH

OSC

ON

(7

05

|

al

1

iesieniniaeteaidaiiimatimnitemimmiadal

—

RN

RELIES,

—w

LR

TITTY

—_

—

EYEE

=

=e

AAS

ST

—_—

SA

Seiad

ASC

coal

AT

LRT

ITE

=—

einai

it

LALIT

er

Sl

—

EE

A

=

e

IC

Block

Diagram

Note:

g

e

All

capacitors

are

in

uF

unless

otherwise

noted.

pF:

yyF

50

WV

or

less

are

not

indicated

except

for

electrolytics

and

ICO1

BA3308

tantalums.

¢

All

resistors

are

in

Q

and

'/,W

or

less

unless

otherwise

specified.

«

%

:

indicates

tolerance.

e

:

B+

Line.

e

[(__]

:

panel

designation.

¢

[C_]

:

adjustment

for

repair.

e

Power

voltage

is

dc

9

V

and

fed

with

regulated

dc

power

supply

from

external

power

voltage

jack.

e

Voltages

are

dc

with

respect

to

ground

under

no-signal

con-

ditions.

e

Voltages

are

taken

with

a

VOM

(10

MQ/V).

Voltage

variations

may

be

noted

due

to

normal

production

tolerances.

e

Signal

path.

c>

:

RF

signal

&>

:

AUDIO

signal

NOTE:

SECTION

4

EXPLODED

VIEW

©

-XX

and

-X

mean

standardized

parts,

so

they

e

Items

marked

“*”

are

not

stocked

since

they

may

have

some

difference

from

the

original

one.

¢

Color

Indication

of

Appearrance

Parts

Example:

KNOB,

BALANCE

(WHITE)...

.

(RED)

items.

t

‘i

e

The

mechanical

parts

with

no

reference

num-

Parts

Color

Cabinet's

Color

are

seldom

required

for

routine

service.

Some

delay

should

be

anticipated

when

ordering

these

ber

in

the

exploded

views

are

not

supplied.

e

Accessories

and

packing

materials

list

is

given

in

the

last

of

this

parts

list.

Ref.

No.

Part

No.

Description

1

7-685-104-19

SCREW

+P

2X6

TYPE2

NON-SLIT

2

3~320-382-01.

FOOT,

RUBBER

3

4-979-840-01

CABINET

(LOWER)

Remark

==

Ref.

No.

*

4

)

6

Part

No.

Description

A-4542-364-A

TX

BOARD,

COMPLETE

4-979-841-01

COVER

(SWITCH)

4-979-839-01

CABINET

(UPPER)

Remark

NOTE:

@

Due

to

standardization,

replacements

in

the

parts

list

may

be

different

from

the

parts

specified

in

the

diagrams

or

the

components

used

on

the

set.

@

-XX

and

-X

mean

standardized

parts,

so

they

may

have

some

difference

from

the

original

one.

@

RESISTORS

All

resistors

are

in

ohms.

SECTION

5

ELECTRICAL

PARTS

LIST

Items

marked

”*”

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

be

anticipated

when

ordering

these

items.

SEMICONDUCTORS

In

each

case,

u:y,

for

example:

uA..:

WA.

uPA.:

“PA.

uPB..:

PB...

uPC..:

uPC..

uPD..:

xPD..

CAPACITORS

The

components

identified

by

mark

A\

or

dotted

line

with

mark

A\

are

critical

for

safety.

Replace

only

with

part

number

specified.

cmos

|

Les

composants

identifiés

par

une

marque

A\

sont

critiques

pour

la

sécurité.

METAL:

Metal-film

resistor.

uF:

wF

When

indicating

parts

by

reference

Ne

les

remplacer

que

par

une

piéce

METAL

OXIDE:

Metal

oxide-film

resistor.

COILS

number,

please

include

the

board.

portant

le

numéro

spécifié.

F:nonflammable

ul:

eH

@

Abbreviation

AUS:

Australian

E13:220-240V

AC

Area

£92:120V

AC

Area

JE:

Tourist

Ref.

No.

Part

No.

Description

Remark

Ref.No.

Part

No.

Description

Remark

*

A-4542-364-A

TX

BOARD,

COMPLETE

D26

8-719-992-13

DIODE

DAL5815

(INFRARED

EMITTER)

.

Jeloieoooioicioliioioitok

D51

=

8-719-057-93

DIODE

SVC203SPA-AL

<

CAPACITOR

> <

IC

>

C01

1-162-291-31

CERAMIC

560PF

10%

50V

1C01

8-759-939-73

IC

BA3308

C02

1-130-491-00

MYLAR

0.

047uF

5%

50V

C03

1-126-963-11

ELECT

4,

TuF

20%

50V

<

JACK

>

C04

1-162-215-31

CERAMIC

47PF

Hy

50V

C05

1-126-963-11

ELECT

4,

TuF

20%

50V

J01

1-764-270-11

JACK,

STEREO

MINIATURE

(DIA.

3. 5)

(AUDIO

IN

B)

J02

1-764-269-21

JACK,

(AUDIO

IN

A

R-CH)

C06

1-162-302-11

CERAMIC

0.

0022uF

20%

16V

J03

1-764-269-11

JACK,

(AUDIO

IN

A

L-CH)

C07

1-162-199-31

CERAMIC

10PF

Hy

4

50V

J04

=

1-573-667-11

JACK,

DC

(POLAR

UNITY

TYPE)

(DC

IN

9V)

C08

1-162-306-11

CERAMIC

0.

O1uF

30%

16V

C11

1-162-306-11

CERAMIC

0.

O1uF

30%

16V

<

COIL

>

021

1-104-664-11

ELECT

ATuF

20%

10V

L01

1-411-714-11

COIL

(OSC)

(2.

8MHz)

(22

1-162-306-11

CERAMIC

0.

OluF

30%

16V

L51

1-411-713-11

COIL

(OSC)

(2.

3MHz)

C23

1-162-306-11

CERAMIC

0.

O1uF

30%

16V

C24

1-104-664-11

ELECT

ATuF

20%

10V

<

TRANSISTOR

>

¢25

1-104-664-11

ELECT

47uF

20%

16V

026

1-104-664-11

ELECT

47uF

20% 10V

Q01

8-729-266-83

TRANSISTOR

2SC2668-Y

Q02

8-729-024-00

TRANSISTOR

28C3377-T93QR

C27

1-104-664-11

ELECT

47uF

20%

10V

Q03

8-729-119-76

TRANSISTOR

2SA1175-HFE

C51

1-162-291-31

CERAMIC

560PF

10%

50V

Q21

8-729-119-78

TRANSISTOR

2SC403SP-51

C52

1-130-491-00

MYLAR

0.

047uF

5%

30V

Q51

8-729-266-83

TRANSISTOR

2SC2668-Y

C53

1-126-963-11

ELECT

4,

TuF

20%

50V

C54

1-162-215-31

CERAMIC

47PF

5%

50V

Q52

8-729-024-00

TRANSISTOR

28(03377-T93QR

Q53

8-729-119-76

TRANSISTOR

2SA1175~-HFE

C55

1-126-963-11

ELECT

4.

TuF

20%

50V

C56

1-162-302-11

CERAMIC

0.0022uF

20%

16V

<

RESISTOR

>

C57

1-162-201-31

CERAMIC

12PF

Hy

50V

C58

1-162-306-11

CERAMIC

0.

OluF

30%

16V

RO1

1-249-437-11

CARBON

47K

5%

8

1/4W

C61

1-162-306-11

CERAMIC

0.

OluF

30%

16V

R02

1-249-437-11

CARBON

47K

5%

1/4W

R04

=:

1-249-419-11

CARBON

1.5K

5%

41/4W

<

DIODE

>

R05

1-249-419-11

CARBON

1.5K

5%

1/4W

R06

1-247-807-31

CARBON

100

«5%

=61/4W

DO1

8-719-057-93

DIODE

SVC203SPA-AL

D22

8-719-114-35

DIODE

RD5.

6JSB

R07

1-249-437-11

CARBON

AIK

5%

8

1/48

D23

8-719-992-13

DIODE

DAL5815

(INFRARED

EMITTER)

RO8

1-249-429-11

CARBON

10K

5%

8

§=61/4W

D24

8-719-992-13

DIODE

DAL5815

(INFRARED

EMITTER)

ROS

1-249-425-11

CARBON

4.7K

5%

1/4W

D25

8-719-992-13

DIODE

DAL5815

(INFRARED

EMITTER)

R10

1-247-863-11

CARBON

22K

5%

§©61/4W

eee

ee

Ref.

No.

Ril

R12

R14

R15

R16

R17

R18

R19

R20

R21

R22

R23

R24

Rol

R52

R54

R50:

R56

R57

R58

R59

R60

R61

R62

R64

R65

R66

R67

R68

R69

R70

S01

Part.

No.

Description

'1-247-893-11

CARBON

1-247-807-31

CARBON

1-249-421-11

CARBON

1-215-460-00

METAL

1-215-433-00

METAL

1-249-422-11

CARBON

1-249-393-11

CARBON

1-249-421-11

CARBON

1-249-423-11

CARBON

1-259-882-11

CARBON

1-249-429-11

CARBON

1-249-416-11

CARBON

1-249-419-11

CARBON

1-249-437-11

CARBON

1-249-437-11

CARBON

1-249-419-11

CARBON

1-249-419-11

CARBON

1-247-807-31

CARBON

1-249-437-11

CARBON

1-247-852-11

CARBON

1-249-425-11

CARBON

1-247-863-11

CARBON

1-247-893-11

CARBON

1-247-807-31

CARBON

1-249-421-11

CARBON

1-215-460-00

METAL

1-215-433-00

METAL

1-249-422-11

CARBON

1-249-393-11

CARBON

1-249-421-11

CARBON

1-249-423-11

CARBON

<

SWITCH

>

1-554-419-00

SWITCH,

PUSH

(1

KEY)

(POWER)

JAI

III

IO

OSI

IO

OI

IO

OO

IO

I

OO

IO

390K

100

2.

2K

43K

3.

3K

2.

7K

10

2.

2K

3.

3K

3.

3M

10K

820

1.

5K

47K

ATK

1.

5K

1.

5K

100

47K

7.

OK

4.

7K

22K

390K

100

2.

2K

43K

3.

3K

2.

7K

10

2.

2K

3%

om

1%

o%

om

0%

o%

5%

o%

3%

5%

Hy

§

o%

3%

a”

o%

1%

o%

a”

5

Remark

1/4W

1/49

1/4W

1/40

1/4W

1/4

1/4W

1/4¥

1/4W

1/44

1/4W

Ref.

No.

Part

No.

Description

Remark

>

PPPPPE

*& &

*

ACCESSORIES

&

PACKING

MATERIALS

JOO

OO

OI

ICO

pO

IOk

1-465-948-31

ADAPTOR,

AC

(AC-E9015)

(AEP,

E13)

1-467-852-11

ADAPTOR,

AC

(AUS)

-1-473-588-11

ADAPTOR,

AC

(AC-S901)

(US,

Canadian,

E92)

1-473-590-11

ADAPTOR,

AC

(UK)

1-569-008-11

ADAPTER,

CONVERSION

2P

(JE)

1-693-130-11

ADAPTOR,

AC

(AC-905)

(JE)

1-751-754-11

CORD,

CONNECTION

(STEREO

MINI

PLUG—PIN

PLUG)

3-324-066~-01

SHEET,

PROTECTION

(for

MDR-IF120)

(EXCEPT

US)

3-336-764-01

SHEET,

PROTECTION

(for

TMR-IF120)

(EXCEPT

US)

3-810-651-11

MANUAL,

INSTRUCTION

(ENGLISH,

FRENCH,

SPANISH)

(US,

Canadian,

AEP,

UK,

E,

AUS,

JE)

3-810-651-21

MANUAL,

INSTRUCTION

(DUTCH,

GERMAN)

(AEP)

3-810-651-31

MANUAL,

INSTRUCTION

(ITALIAN,

PORTUGUESE)

(AEP)

4-981-226-01

BOX,

INDIVIDUAL

(Canadian,

AEP,

E)

4-981-226-11

BOX,

INDIVIDUAL

(UK,

JE)

4-981-226-21

BOX,

INDIVIDUAL

(AUS)

The

components

identified

by

|

Les

composants

identifiés

mark

A\

or

dotted

line

with

|

par

une

marque

A\

sont

mark

A\

are

critical

for

critiques

pour

la

sécurité.

safety.

Replace

only

with

Ne

les

remplacer

que

par

une

piéce

~11-

part

number

specified.

portant

le

numéro

spécifié.

MDR-IF120/IF120K

_

English

.

96B0589-1

Sony

Corporation

Printed

in

Japan

Consumer

A&V

Products

Company

©

1996.

2

Published

by

Home

A&V

Products

Div.

9-960-517-11

Personal

A&V

Products

Div.

Quality

Engineering

Dept.

ee

Sony MDR-IF120 User manual

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