Sony MDR-IF140 Manual

© 2003   Sony Corporation     Printed in Malaysia

3-248-364-13(1)

Owner’s Record
The model number is located on the left inner
side of the headband.
The serial number is located on the right
inner side of the headband.
Record these numbers in the spaces provided
below. Refer to them whenever you call upon
your Sony dealer regarding this product.

Model No. MDR-IF140
Serial No.

This device complies with Part 15 of the FCC
Rules.  Operation is subject to the following two
conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any
interference received, including interference that
may cause undesired operation.

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

Operating Instructions

Mode d’emploi

Manual de instrucciones

N

• Connect your AV component to the

transmitter you use. See the operating
instruction supplied with the transmitter
for the connection and operation of the
transmitter.

• To prevent your ears from being damaged,

first lower the volume.

Turn on the headphones.
The power indicator on the upper part of
the right housing glows red.

Put on the headphones.
Be sure to put the right housing (R) on
your right ear and the left housing (L) on
your left ear.

Adjust the volume.
If the infrared sensors are covered by
your hands when adjusting the volume,
the mute function will be activated and
volume may not be adjusted.  To adjust
the volume, move nearer toward the
transmitter or orient the infrared emitters
on the left housing towards the
transmitter.

If the infrared rays are obstructed, or the
headphones are used outside their effective
range, noise will increase and sound will
become hard to hear. To avoid potential ear
damage as a result of noise, this function
mute any sound from the headphones.
Sound is automatically restored when you
move nearer the transmitter or remove the
obstruction.

Take off the headphones, and then turn off
the power. (You may hear some noise when
you disconnect the AC power adapter from
the transmitter before taking off the
headphones.)

Thank you for purchasing the Sony MDR-
IF140 Cordless Stereo Headphone. Before
operating the unit, please read this manual
thoroughly and retain it for future reference.

The MDR-IF140 is a cordless stereo
headphone using infrared transmission. You
can enjoy listening to a programme free from
the restriction of the headphone cord by
simply connecting the transmitter (optional)
to a TV, or audio components equipped with
a headphone jack or a line output jack.

• Cordless, noiseless infrared headphone

resistant to external noise, etc.

• Self-adjusting headband mechanism

eliminating the need for headband
adjustment.

• Single VOL control adjusts both the right

and left volume of the headphones.

• This unit can be used with the Sony

cordless headphone system.

Use the MDR-140 with the optional
transmitter.
The MDR-140 Headphone should be used
with the Sony optional cordless stereo
headphone system (except MDR-IF630RK).

N

Insert the size AAA dry battery into
the battery compartment matching
3

 terminal on the battery to 3 in

*

1

at 1 kHz, 1 mW+1 mW output

*

2

Time stated above may vary, depending on the
temperature or conditions of use.

• Do not charge the dry battery.
• Do not carry the dry battery together with

coins or other metallic objects. It can
generate heat if the positive and negative
terminals of the battery are accidentally
come into contact with metallic objects.

• When you are not going to use the unit for

a long time, remove the battery to avoid
damage from battery leakage or corrosion.

When the battery becomes weak, the power
indicator light dims, or sound becomes
distorted or noisy. Replace the battery with
new one as soon as possible.

Sony alkaline battery
LR03/AM-4 (N)

Sony manganese battery
R03/UM-4 (NU)

60 hours*

2

28 hours*

2

Ce symbole, apposé sur le produit ou sur
son emballage, indique que ce produit ne
doit pas être traité avec les déchets
ménagers. Il doit être remis à un point de
collecte approprié pour le recyclage des
équipements électriques et électroniques.
En s’assurant que ce produit est bien mis
au rebus de manière appropriée, vous
aiderez à prévenir les conséquences
négatives potentielles pour
l’environnement et la santé humaine. Le
recyclage des matériaux aidera à conserver
les ressources naturelles. Pour toute
information supplémentaire au sujet du
recyclage de ce produit, vous pouvez
contacter votre municipalité, votre
déchetterie ou le magasin où vous avez
acheté le produit.

Nous vous remercions d’avoir fait
l’acquisition de ce casque stéréo sans fil
MDR-IF140 de Sony. Avant d’utiliser cet
appareil, lisez attentivement le présent mode
d’emploi et conservez-le pour toute référence
ultérieure.

Le MDR-IF140 est un casque stéréo sans fil
fonctionnant par transmission de rayons
infrarouges. En raccordant simplement le
transmetteur (en option) à un téléviseur ou à
un appareil audio équipé d’une prise de
casque ou d’une prise de sortie de ligne, vous
pouvez écouter une émission sans être gêné
par le cordon du casque.

• Casque sans fil à infrarouges n’émettant

pas de parasites et résistant aux parasites
externes, etc.

• Mécanisme de serre-tête auto-ajustable qui

évite à l’utilisateur d’avoir à régler la taille
du serre-tête.

• Une commande VOL unique permet de

régler à la fois le volume des écouteurs
droit et gauche du casque.

• Cet appareil peut être utilisé avec le

système de casque sans fil de Sony.

Utilisez le casque MDR-140 avec le
transmetteur en option.
Le casque MDR-140 doit être utilisé avec le
système de casque stéréo sans fil de Sony (en
option) (sauf avec le MDR-IF630RK).

N

Insérez la pile sèche (format AAA)
fournie dans le logement de la pile
en faisant correspondre la borne 3
de la pile au signe 3 inscrit dans le
logement.

*

1

à 1 kHz, sortie 1 mW +1 mW

*

2

La durée mentionnée ci-dessus peut varier en
fonction de la température ou des conditions
d’utilisation.

• Ne rechargez pas la pile sèche.
• Ne mettez pas la pile sèche en contact avec

des pièces de monnaie ou d’autres objets
métalliques. Si le pôle positif et le pôle
négatif de la pile sont mis en contact l’un
avec l’autre via un objet métallique, de la
chaleur peut être générée.

• Si vous prévoyez de ne pas utiliser

l’appareil pendant une longue période,
retirez-en la pile afin d’éviter des dégâts
dus à une fuite d’électrolyte ou à la
corrosion.

Lorsque la pile devient faible, le voyant
d’alimentation faiblit ou le son est déformé
ou parasité. Remplacez la pile par une pile
neuve le plus tôt possible.

The ear pads are replaceable. If the ear pads
become dirty or worn out, replace them as
illustrated below.
The ear pad is not commercially available.
You can order replacements from the store
where you purchased this system, or at your
nearest Sony dealer.

N

Modulation system

Frequency modulation

Carrier frequency

Right 2.8 MHz
Left 2.3 MHz

Frequency response

18 – 22,000 Hz

Power source

DC 1.5 V (size AAA) dry battery

Mass

Approx. 125 g (4.41 oz.) including
battery

Operating instructions (1)

Design and specifications are subject to change
without notice.

• When the headphones are not to be used

for a long period of time, remove the
battery to avoid damage caused by battery
leakage and subsequent corrosion.

• Do not leave the cordless stereo

headphones in a location subject to direct
sunlight, heat or moisture (It is
recommended to use the headphones at a
of temperature of between 5 ˚C and 35 ˚C
(41 ˚F and 95 ˚F).)

• Do not drop, hit or otherwise subject

headphones to strong shocks of any kind.
This could damage the product.

Avoid using headphones at high volume.
Hearing experts advise against continuous,
loud and extended play. If you experience a
ringing in your ears, lower the volume or
discontinue use.

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 headphones that are not
covered in this manual, please consult
nearest Sony dealer.

, Turn on the transmitter first, and then put on

the headphones.

, Check the connection of the audio/video

equipment or the AC power adapter.

, Check that the audio/video equipment

connected to the transmitter is turned on.

, If the transmitter is connected to the

headphones jack, raise the volume of the
audio/video equipment connected to the
transmitter.

, 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 dims,

flashes or goes off.
• Replace dry battery with new one.

, If the transmitter is connected to the

headphones jack, raise the volume of the
audio/video equipment connected to the
transmitter.

, The headphones’ power indicator light dims,

flashes or goes off.

• Replace dry battery with new one.

, Move closer to the transmitter. (As you move

away from the transmitter, more noise is
likely to be heard. This is inherent in nfrared
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.

, If you use the headphones by a window

where the sunlight is too strong, draw the
curtains/blinds to shut out the direct
sunlight, or use the headphones away from
the sunlight.

, Change the position or angle of the

transmitter.

, If the transmitter is connected to the

headphones jack, raise the volume of the
audio/video equipment connected to the
transmitter.

, The headphones’ power indicator light dims,

flashes or goes off.
• Replace dry battery with new one.

Pile alcaline LR03/AM-4
(N) de Sony

Pile au manganèse R03/
UM-4 (NU) de Sony

60 heures*

2

28 heures*

2

This symbol on the product or on its
packaging indicates that this product shall
not be treated as household waste. Instead it
shall be handed over to the applicable
collection point for the recycling of electrical
and electronic equipment. By ensuring this
product is disposed of correctly, you will
help prevent potential negative consequences
for the environment and human health,
which could otherwise be caused by
inappropriate waste handling of this
product. The recycling of materials will help
to conserve natural resources. For more
detailed information about recycling of this
product, please contact your local city office,
your household waste disposal service or the
shop where you purchased the product.