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MDR-IF130K.  3-862-872-41(1) EG Page 1

MDR-IF130K.  3-862-872-41(1) EG  Page 1

WARNING

To prevent fire or shock hazard, do not
expose the unit to rain or moisture.

To avoid electrical shock, do not open the
cabinet. Refer servicing to qualified
personnel only.

WARNING

You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate this
equipment.

Welcome!

Thank you for purchasing the Sony MDR-IF130K
Cordless Stereo Headphone System.  Before
operating the unit, please read this manual
thoroughly and retain it for future reference.
Some features are:
Das System besitzt die folgenden Funktionen:
• Cordless system that allows you to listen to a

program free from the restriction of a cord.

• Broad horizontal listening area that gives you

superb sound virtually anywhere in the room.

• Self-adjusting headband for fitting your head

perfectly.

• The VOL control adjusts the volume level of

both channels.

• The power of the headphones turns on and off

automatically every time you put the
headphones on and off (Auto power on/off
function).

Unpacking

Check that you have the following items:

• Transmitter

• AC power adaptor

• Connecting cord (phono plugs 

˜

 stereo mini

plug)

• Headphones

Setting up the
transmitter

1

Connect the transmitter to audio/video
equipment.

a

When connecting to your  audio/video
system’s LINE OUT or REC OUT jacks,
connect the cord to the transmitter’s LINE
IN jack only.

Note

If your audio/video equipment has a stereo mini
jack(LINE OUT), connect the stereo mini jack(LINE OUT)
to LINE IN of the transmitter by using optional
connecting cord RK-G136HG. Connecting the LINE OUT
jack of your audio/video equipment to PHONES IN of
the transmitter will cause low or muffled sound. To
connect to PHONES IN of the transmitter with the
supplied cord, use a headphones jack on the audio/video
equipment.

b

When connecting to your Discman’s
headphones jack, connect the cord to the
transmitter’s PHONES IN jack only.

2

Connect the transmitter to a power
source.

Notes

•Do not connect to the PHONES IN jacks and

LINE IN 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.

•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.

Setting up the
headphones

1

Open the battery compartment lid on top
of the left housing.

2

Insert one R6 (size AA) battery by
matching the + on the battery to the +
terminal on the lid.

3

Close the battery compartment lid.

Removing the battery

Open the battery compartment lid, while keeping
the housing level and remove the battery from the
battery compartment as illustrated below.

Battery life

When to replace the battery

Replace the battery with new one when the
POWER indicator on headphone dims, and a
hissing noise increases.

Listening to a
program

1

Turn on the audio/video equipment
connected to the transmitter. When the
audio signals is input, the transmitter
turns on automatically and the infrared
emitters glow. If the transmitter is
connected to the headphone jack, 

set the

volume control of the audio source
equipment as high as possible but not
so high that the audio signal gets
distorted. (Around level 5 or 6 on the
volume control should be
appropriate.)

2

Put on the headphones and the power
turns on automatically.   The power
indicator glows red when the power
turns on.

3

Adjust the volume.

Auto power on/off function

When you remove the headphones, the power
turns off automatically. Do not pull up the self
adjusting band when not using the headphones,
otherwise the headphones will be switched on.

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 next section), 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.

When no audio signal is received
at the transmitter input for more
than approximately five minutes

The transmitter will be turned off automatically.

After listening to a program

Take the headphones off before the transmitter
turns off. 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 not a malfunction.

The effective areas
of the transmitter

The illustration below shows the approximate area
covered by the infrared rays emitted from the
transmitter.

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.

Precautions

• Before operating the system, check that the

operating voltage of your system is identical
with the voltage of your local power supply.

• 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.

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.

Replacing the Ear
Pads

When the ear pads become dirty or damaged,
consult your nearest Sony dealer and replace them
as illustrated below.

Troubleshooting

No sound/Muffled sound

/

Check the connection of the audio/video
equipment or the AC power adaptor.

/

Check that the audio/video equipment is turned
on.

/

Turn up the volume on the connected audio/video
equipment, if the transmitter is connected to the
headphones jack.  (Around level 5 or 6 on the
volume control should be appropriate.)

/

The mute function is activated.
• Check if there is any object between the

transmitter and the headphones.

• Use the headphones near the transmitter.
• Change the position and angle of the transmitter.

/

The headphones’ power indicator light is weak or
turned off.
• Replace the battery of the headphones.

/

When the LINE OUT jack of your audio/ video
equipment is connected to PHONES IN jack of the
transmitter, the sound will be low. Connect the
LINE OUT jack to the LINE IN jack as described in
“Setting up the transmitter”.

Distortion

/

If the transmitter is connected to the headphones
jack, turn down the volume of the connected
audio/video equipment.  (Around level 5 or 6 on
the volume control should be appropriate.)

/

The headphones’ power indicator light is weak or
turned off.
• Replace the battery of the headphones.

/

When the headphone’s jack output is connected to
the LINE IN jack of the transmitter, increasing the
volume of the connected audio/video equipment
may cause distortion. Connect the headphones jack
output instead to PHONES IN jack as described in
“Setting up the transmitter”.

Loud background noise

/

Move closer to the transmitter.  As you move away
from the transmitter, more noise is likely to be
heard.  This is inherent to infrared ray
communication and does not mean that there is a
problem with the unit itself.

/

Check that there is no object between the
transmitter and the headphones.

/

Check that the infrared sensors are not covered
with your hands or hair.

/

Change the position or angle of the transmitter.
• The headphones are used by a window where

the sunlight is too strong.

n

Draw the curtains/blind to shut out the direct
sunlight, or use the headphones away form
the sunlight.

/

If the transmitter is connected to the headphones
jack, turn up the volume of the connected audio/
video equipment.  (Around level 5 or 6 on the
volume control should be appropriate.)

/

The headphones’ power indicator light is weak or
turned off.
• Replace the battery of the headphones.

Specifications

General

Modulation system

Frequency modulation

Carrier frequency

Right 2.8 MHz
Left 2.3 MHz

Frequency response

18 – 22,000 Hz

Transmitter TMR-IF130

Stromversorgung

Power source

DC IN 9 V jack accepts

power supplied from the AC power
adaptor for use on the following
voltages:

Audio input

Phono jacks/stereo mini jack

Dimensions

Approx. 152 

×

 38 

 ×

 72 mm

(6  

×

 1

 1

/

2

  

×

 2 

3

/

4

 in.) (w/h/d)

Mass

Approx. 75 g (2.7 oz.)

Headphones MDR-IF230

Power source

Supplied Ni-Cd rechargeable battery
NC-AA (HJ) or DC 1.5 V, 1 

×

 R6 (size

AA) battery

Mass

Approx. 180 g (6.4 oz.) including
battery

Supplied Ni-Cd rechargeable battery

Model name

NC-AA (HJ)

Type

Ni-Cd

Voltage

1.2 V

Capacity

600 mAh

Optional accessories

Plug adaptor

PC-236HG
(stereo mini jack 

˜

 monaural mini plug)

PC-234HG
(stereo mini jack 

˜

 stereo phone plug)

Connecting cords

RK-G136HG
(stereo mini plug 

˜

 stereo mini plug)

RK-G129HG
(stereo mini plug 

˜

 phono plug  

×

 2)

Design and specifications are subject to change without
notice.

Sony Corporation © 1998  Printed in Korea

MDR-IF130K

3-862-872-41(1)

Operating Instructions

Bedienungsanleitung

English

Cordless Stereo
Headphone System

TMR-IF130

MDR-IF230

to LINE OUT or REC
OUT jacks

Transmitter

to LINE IN jack

Connecting cord
(supplied)

Left channel
(white)

Right channel
(red)

Stereo system, TV,
VCR, etc.

R

LINE IN

DC IN 9V

L

¥

PHONES IN

to a
headphones
jack (stereo
mini jack)

Connecting cord
(supplied)

Transmitter

to PHONES IN
jacks

Right
channel
(red)

Left channel
(white)

Discman,
WALKMAN*, TV,
VCR, etc.

to a headphones
jack (stereo
phone jack)

Unimatch plug
adaptor (not
supplied)

R

LINE IN

DC IN 9V

L

¥

PHONES IN

R

LINE IN

DC IN 9V

L

¥

PHONES IN

Transmitter

to an AC outlet

to DC IN 9V
jack

AC power adaptor
(supplied)

Battery

Sony alkaline battery
LR6/AM3 (N)

Sony battery
R6P/SUM-3 (NS)

Approx. hours

100

50

45°

45°

Approx. 3 m
(1181/8 in.)

Infrared ray

Approx. 3 m
(1181/8 in.)

Transmitter

Housing (left)

Battery
compartment lid

Battery

Polarity of the plug

Place the new ear pad
around the driver unit
as illustrated.

Approx. 7 m (23 ft.)

Remove the old ear pad
by pulling it out.

Where purchased

U.S.A./Canada

U.K.

European countries

Other countries

Japan (Except for
Japanese domestic
model)

Operating voltage

120 V AC, 60 HZ

220 – 230 V AC, 50 Hz

220 – 230V AC, 50 Hz

220 – 230 V AC,
50/60 Hz or 120 V AC, 60 Hz

220 – 240 V AC, 50 Hz

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