Sony MDR-IF5K Manuale utente

US

Model

Canadian

Model

DRIES

MEP

Model

UK

Model

E

Model

Australian

Model

Discard

MDR-IF5K

Service

Manual

(No.

9-953-691-12)

priviously

issued.

This

Service

Manual

contains

it.

TMR-IF5

(Transmitter)

SPECIFICATIONS

General

Headphones

MDR-IF5

Infrared

wavelength:

850nm

Power

source:

Built-in

rechargeable

battery

(GF

100)

Moduiation:

Frequency

modulation

Weight:

98g

(3.5

02.)

Carrier

frequency:

Right

2.8

MHz

Left

2.3MHz

Supplied

accessories

Effective

range:

up

to

7m

(23

ft)

AC

power

adaptor

(1)

Frequency

response:

18

—

22,000

Hz

Connecting

cord

(stereo

mini

jack

—

stereo

phono

Distortion:

Less

than

1%

at

1

kHz

plugs)

(1)

.

Plug

adaptor

(stereo

mini

jack

—

stereo

phone

Transmitter

TMR-IF5

plug)

(1)

Power

source:

DC

9V

jack

accepts:

Screws

(M3.1

x

20mm)

(2)

Sony

AC-912

AC

power

Design

and

specifications

subject

to

change

adaptor

(supplied)

without

notice.

Dimensions:

88

x

220

x

93mm

(32

x

8%

x

33%

in),

(w/h/d)

Weight:

250

g

(8.8

02.)

Features

®

infrared

transmitting

system

eliminates

the

headphone

cord.

°

This

headphone

system

can

be

used

with

any

audio/video

equipment

provided

with

a

headphone

jack

or

line

out

jack.

°

The

quality

of

the

sound

is

excellent

because

it

is

transmitted

with

high

carrier

frequencies.

e

The

lightweight

rechargeable

battery

built

into

the

headphones

allows

a

compact

design

and

economical

operation.

®

A

trickle

charging

system

keeps

headphones

ready

to

use

whenever

they

are

rested

on the

transmitter.

e

You

can

adjust

the

audio

level

at

your

listening

position

by

using

the

volume

controls

on

the

headphones.

Ear

a

i

aa

eam

Sa

ee

Se)

MDK-IF5K

MDR-IF5/TMR-IF5

SECTION

1

GENERAL

Parts

fe

eyarti

icersit(eya|

Transmitter

3

Charging

indicator

Infrared

emitters

Power

indicator:

Infrared

sensors

Positioning

the

Transmitter

The

diagram

below

illustrates

the

approximate

effective

range

of

the

infrared

rays

emitted

from

the

transmitter.

Position

the

transmit-

ter

so

that

your

listening

area

is

within

the

effective

range.

The

infrared

rays

will

not

penetrate

walis

or

opaque

glass,

therefore

the

head-

phones

must

be

used

in

“in

sight”

area

of

the

transmitter.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

Contact

pins

Quick

charge

button

DC

IN

9V

(DC

external

power

input)

jack

Audio

input

cord

-

infrared

sensor

Power

switch

Head

band

Contact

holes

Volume

controls

Ear

pads

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

MARQUE

/\

SUR

LES

DIAGRAMMES

SCHEMATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REMPLACER

CES

COM-

POSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

MDK-IF5K

MDR-IF5/TMR-IF5

Connecting

to

an

Audio/Video

Equipment

Connecting

the

Transmitter

to

the

Headphone

Connecting

the

Transmitter

to

the

LINE

OUT

Jack

or

REC

OUT

Jack

_

|

[

Connecting

to

a

Wall

Outlet

AC

power

adaptor

—

to

a

wail

outlet

to

stereo

phone

jack

Amplifier,

CO

player,

ete.

<7]

Suoptied

plug

adaptor

to

LINE

out

or

REC

OUT

jack

ag

Right

ch:

Amplifier,

(res)

ohannet

TV.

VCR,

ete.

Supplied

connection

7

cord

Left

channet

TV.

VCR

(whnte)

Walkman’,

etc.

to

stereo

mini

jack

NOTE:

Use

only

the

supplied

AC

power

adaptor

manu-

factured

by

Sony.

Polarity

of

the

plugs

of

other

manu-

eo

.

factures

may

be

different.

j

Walkman

is

a

trademark

of

Sony

Corporation

y

|

Polarity

of

the

Sony

plug

Connection

to

an

earphone

(monaural

mini)

jack

Use

the

optional

PC-236S

plug

adaptor.

Charging

the

Headphones

Battery

The

headphones

are

powered

by

their

built-in

rechargeabie

a

battery.

When

you

use

the

headphones

for

the

first

time

or

the

Connect

the

AC

power

adaptor

to

the

Rest

the

headphones

on

the

Press

the

quick

charge

button

battery

is

completely

exhausted,

proceed

to

charge

the

battery

transmitter.

wens

ne

that

the

contac

‘on

th

ine

rear

of

the

transmitter.

quickly

(quick

charge)

in

the

following

way:

Pins

fit

into

the

conta

es

he

charging

indicator

turns

red

the

headphones.

The

charging

and

returns

to

green

after

about

indicator

glows

green

faintly.

3

hours.

Now,

you

can

use

head-

Set

the

power

switch

on

the

headphones

to

phones

for

about

3

hours.

OFFICHG.

OFFICHG

Caution

Do

not

repeat

the

quick

charge

more

than

two

times

in

succes-

sion,

or

the

battery

may

be

impaired.

Note

«

Whenever

the

headphones

are

rested

on

the

transmitter,

the

battery

is

charged

continuously

and

the

charging

indicator

glows

green

faintly

to

indicate

trickle

charging.

ft

'f

you

want

to

fully

charge

the

*

Since

little

electric

current

is

used

for

trickle

charging,

there

is

no

d

o

battery

to

use

the

headphones

need

to

worry

about

overcharging.

for

about

6

hours,

repeat

the

«lt

takes

about

50

hours

to

fully

charge

the

battery

by

the

trickle

;

quick

charge.

charging.

Listening

to

a

Program

When

the

no

signal

is

supplied

for

Turn

on

the

audio/video

equipment

connected

to

the

Turn

on

the

power

switch

of

the

head-

Adjust

the

volume

controls

so

that

more

than

about

3

minutes

transmitter.

phones

and

put

on

the

headphones.

the

audio

jevel

of

both

channels

The

transmitter

is

turned

off

Adjust

the

head

band,

if

necessary.

gets

equal.

automatically.

POWER—

ON

When

the

audio

signal

is

interrupted

4

-

or

extremely

low

sound

continues

tor

more

than

about

3

minutes

The

transmitter

may

be

turned

off.

When

the

transmitter

is

connected

to

the

headphone

jack,

increase

the

volume

of

the

connected

equipment

and

tower

the

volume

of

the

headphones.

After

using

the

headphones

Set

the

power

switch

to

OFF/CHG

and

rest

the

headphones

on

the

transmitter.

E :

Note

When

the

audio

signal

is

input,

the

transmitter

turns

on

auto-

_

3

;

¢

Be

sure

to

remain

in

the

effective

matically

and

the

infrared

emitters

glow.

If

the

transmitter

is

range

of

the

infrared

rays

while

listen-

connected

to

the

headphone

jack,

set

the

volume

contro!

of

the

ing

(see

diagram

above).

equipment

to

the

middle

position.

¢

Do

not

cover

the

infrared

sensors

with

your

hands

or

hair.

Do

not

use

headphones

under

the

direct

sunlight.

MDR-IF5K

MDR-IF5/TMR-IF5

|

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

-@

HEADPHONES

SECTION

(MDR-IF5)

@

ear

pad

housing

cover

RX

board

[FE

Board]

@

ray

catcher

cover

@

precision

screw

x

(1.7

x

4)

@

precision

screw

(1.7

x

4)

@

+K1.4x3

[Rechargeable

Battery]

@

slider

cover

Y,

.

@

+82x6

@

precision

screw

(1.7

x

4)

SECTION

3

ELECTRICAL

ADJUSTMENTS

1.

The

adjustments

should

be

performed

in

the

order

given.

3.

Supply

9

V

dc

to

the

transmitter

(TMR-IF5)

and

2.5

V

dc

to

the

(As

a

general

rule

the

transmitter

section

(TMR-IF5)

adjustments

headphones

(MDR-IF5)

as

the

power

voltage.

should

be

completed

before

performing

the

headphones

section

(MDR-IF5S)

adjustment.)

2.

The

adjustments

and

measurements

should

be

performed

for

both

L-ch

and

R-ch

unless

otherwise

indicated.

TRANSMITTER

SECTION

[Connection

and

Adjustment

Location]

digital

voltmeter

[Oscillating

Frequency

Adjustment]

Adjusting

Procedure:

No

signal

state.

frequency

counter.

1.

Short

circuit

between

TP3

and

TP13.

2.

Connect

the

frequency

counter

to

TP4

(L

ch)

and

TP5

(R-ch).

3.

Adjust

with

L11

(L-ch)

and L51

(R-ch)

so

that

the

reading

on

the

frequency

counter

becomes

the

specified

value.

Specified

Value:

2.3

+0.003

MHz

2.8

40.003

MHz

TP8

(Leh)

[Bias

Current

Adjustment]

Adjusting

Procedure:

No

signal

state.

.

Connect

the

digital

voltmeter

to

TPS

(L-ch)

and

TPQ

(R-ch).

2.

Adjust

with

RV11

(L-ch)

and

RV51

(R-ch)

so

that

the

reading

on

the

digital

voltmeter

becomes

the

specified

value.

-_

Specified

Value:

3.

Release

the

short-circuit

between

TP3

and

TP13.

©

ae

[Quick

Charge

Check]

1.

Connect

the

frequency

counter

to

(3)

of

IC41.

.

Short

circuit

P2

(change

out

pin).

3.

Press

the

charge

switch

until

the

charging

indicator

(LED

D52)

turns

red.

4.

Check

the

reading

on

the

frequency

counter

becomes

the

con-

firming

value.

nN

Confirming

Value:

380

+50

Hz

{TX

BOARD]

(TRANSMITTER

BOARD)

short

circuit

regulated

dc

power

supply

HEADPHONES

SECTION

Note:

1.

On

adjusting

the

headphones

section

(MDR-IFS5),

use

the

trans-

mitter

(TMR-IF15)

as

a

jig.

2.

The

patterns

of

the

printed

circuit

boards

for

L-ch

and

R-ch

are

common.

3.

L-ch

adjustment

should

be

completed

before

performing

R-ch

adjustment.

[Preparation]

AF

OSC

€)

attenuator

O

_—_—_—_—_—

\\

input

plug

1

kHz

225

mV

1.

Feed

a

signal

to

jig

(TMR-IF5)

and

connect

a

power

supply

to

DC

IN

jack.

[Receiving

Frequency

Adjustment]

Adjusting

Procedure:

1.

Short

circuit

between

TP2

and

TP3.

2.

Turn

on

the

POWER

switch

of

the

headphones.

3.

Adjust

with

CT11

(L-ch)

and

CT51

(R-ch)

so

that

the

reading

on

VTVM

becomes

maximum.

[Gain

Adjustment]

(Former

Type

Only)

Adjusting

Procedure:

1.

Adjust

to

make

the

input

level

of

jig

(TMR-IF5)

as

low

as

possible.

2.

Adjust

with

CT12

(L-ch)

and

CT52

(R-ch)

so

that

the

reading

on

VTVM

becomes

maximum.

3.

Release

the

short-circuit

between

TP2

and

TP3.

[Connection

and

Adjustment

Location]

FORMER

TYPE

CT12

(L-ch)

CT52

(R-ch)

CTI!

(Lech)

CT5I

(Roh)

VTVM

(RX

Leh/RX

Rch

BOARD]

[Filter

Character

Adjustment]

(New

Type

Only)

Setting:

AM

rf

signal

generator

No

modulation

GND

2.8

MHz

(Lch)

2.3

MHz

(Rch)

output

level:

100

mV

(100

dB)

_

Adjustment

Procedure:

1.

Input

to

TP6

of

Lch.

(2.8

MHz)

2.

Adjust

L53

of

Rech

so

that

the

reading

on

VTVM

becomes

minimum.

3.

Input

to

TP6

of

Rech.

(2.3

MHz)

4.

Adjust

L13

of

Lch

so

that

the

reading

on

VTVM

becomes

minimum.

[Connection

and

Adjustment

Location]

NEW

TYPE

L13

(Leh)

L53

(Rech)

short

circuit

CT11

(Leh)

CT51

(Rech)

regulated

dc

power

supply

2.5

V

de

[RX

Lch/RX

Rch

BOARD]

NEW

TYPE

NEW

TYPE

SECTION

4

DIAGRAMS

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TYPE

TRANSMITTER

SECTION

(TMR-IF5)

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Note:

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capacitors

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in

wF

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noted.

pF:

uuF

50WV

or

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are

not

indicated

except

for

electrolytics

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tantalums,

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resistors

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9

and

1/,W

or

less

unless

otherwise

specified.

Power

voltage

is

9

V

and

fed

with

regulated

dc

power

supply

from

external

power

voltage

jack.

Voltage

and

waveforms

are

dc

with

respect

to

ground

under

no-signal

conditions.

Voltages

are

taken

with

a

VOM

(50

kQ2/V).

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances.

4-3.

NEW

TYPE

HEADPHONES

SECTION

(MDR-IF5)

PRINTED

WIRING

BOARDS

NEW

TYPE

|

NEW

TYPE

a

ee ee

Ee

5

|

6

|

+

|

6

|

9

[|

7%

3

Gan

r»

e

Semiconductor

A

|

(POWER)

;

Location

D1

B-7

Note:

go

The

ON

=®

OFF/CHARGE

©

@

o—-:

parts

extracted

from

the

component

side.

‘a

*

6

ca

—

ae

©

#—:

parts

extracted

from

the

conductor

side.

e

Solder

the

yellow

lead

to

the

red

marked

terminal

on

each

SP11

and

SP51.

Destination

New

Type

Serial

No.

US

47097and

later

Canadian

A50401

and

later

AEP

46297

and

later

UK

53401

and

later

E

23001

and

later

Australian

117501

and

later

TO

SHIELD

235

6H

Ee

ee

|

DI:

INFRARED

|

aa

|

SENSOR

Ly

|

06:

POWER

|

RED

|

INDICATOR

|

Gi.

OF

e

as

——————p

{Lt

_—___-

©

>

a

®

BATT2

®

=

BATT

|

BATTERY

Cae)

(

NI-

CD

)

[RX(R)

BOARD]

|

—

~f

(RX

(L)

BOARD]

|

®

[FE

BOARD]

W

(CONDUCTOR

SIDE)

|

"7

e

*

i

fs

ial

\

i

\

44

bi

om

m

A

\

ALI

a

‘|

;

‘

:

D3

D2

y

AAW

eee

aie

|

(4)

Cees)

Yh

‘S

i.

yt.

SENSOR

f

St

.

ANAS

:

|

OST

/

\

Sa

BRN

|

Spa

AQ

=

:

i

BLU

35]

BRN

2k’

BLK

I

lo}

—

RVSI

Seat

——

@

Semiconductor

Lead

Layouts

CXA1280N

PP506-1

PP601-1

TLR226

(Top

view)

cathode

anode

—11—

—12—

anode

4-4.

NEW

TYPE

HEADPHONES

SECTION

(MDR-IF5)

SCHEMATIC

DIAGRAM

1

2 3

4

r=)

6

7

8

g

RI

2.2k

Bl

PPS06-1

(INFRARED

SENSOR)

10

O

RV11

SOk

11

12

13

(vou

mn

TGA

CXA1280N

FE/BDET/POWER

Q2

28€2712

RF

AMP

Qt

25K209

RF

AMP

|

TO

SHIELD

PAPER

@

~~

82

PP601-1

(INFRARED

SENSOR)

a

eee

IE

|

I

ee

eee

Lal

BATT

(RATTERY)

NI-C8

£3

PP601-1

(INFRARE®

SENSOR)

I

“a

as

a

|

C16

150p

SL

Qit

2502712

[B+]

BAND

PASS

RVS1

50k

£51

HSM276S

[vot]

1

TP7

C59

[+

-01

10

o

Lol

+C52

TX]

FO

YQ

4yV

5

1007

509

i¥}

BATT2

C58

0.01

F

Q13

BICTI4YK

ia

[

RX

(L)

BOARD]

|

CFS1

(2/2)

C67

‘Gn

3p

—

et

Saf

3

—

52

50

(aE)

NI-CB

[

EF

(CHARGE

IN)

Note:

H

'@

All

capacitors

are

in

wF

unless

otherwise

noted.

pF:

uwuF

5OWV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums,

e

All

resistors

are

in

Q

and

1¥/,W

or

less

unless

otherwise

specified.

e@

Power

voltage

is

dc

2.5

V

and

fed

with

regulated

dc

power

supply

from

BATT

TERMINAL.

AEP

Voltage

and

waveforms

are

dc

with

respect

to

ground

UK

under

no-signal

conditions.

e@

Voltages

are

taken

with

a

VOM

(50

kQ/V).

E

Voltage

variations

may

be

noted

due

to

normal

produc-

Australian

tion

tolerances.

Destination

US

Canadian

CXA1280N

FE/DET/POWER

New

Type

Serial

No.

47097and

later

A50401

and

later

46297

and

later

53401

and

later

23001

and

later

@51

25C2712

BAND PASS

Q53

BICI14YK

SWITCH

117501

and

fater

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