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Cordless Stereo Headphone System
Operating Instructions Bedienungsanleitung

GB DE RU

MDR-IF140K

2003 Sony Corporation

WARNING
To prevent fire or shock hazard, do not expose the unit to rain or moisture.
To prevent fire or shock hazard, do not place objects filled with liquids, such as vases, on the apparatus. To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only. Do not install the appliance in a confined space, such as a bookcase or built-in cabinet.
Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) 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.

Owners Record

The model number is located on the top of the transmitter and the left inner side of the headband. The serial number is located at the bottom of the transmitter and the right inner side of 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-IF140K Transmitter TMR-IF130 Headphones MDR-IF140 Serial No. Transmitter Headphones
You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment. The validity of the CE marking is restricted to only those countries where it is legally enforced, mainly in the countries EEA (European Economic Area).

Welcome!

Thank you for purchasing the Sony MDR-IF140K Cordless Stereo Headphone System. Before operating the unit, please read this manual thoroughly and retain it for future reference. The MDR-IF140K is a cordless stereo headphone system using infrared transmission. You can enjoy listening to a program free from the restriction of the headphone cord by simply connecting the transmitter to a TV, or audio components equipped with a headphone jack or a line output jack.
Cordless, noiseless infrared headphone system resistant to external noise, etc. Wide infrared reception range of up to 7m (23 ft.). Self-adjusting headband mechanism eliminating the need for headband adjustment. Single VOL control adjusts both the right and left volume of the headphones.

Table of contents

Getting started
Unpacking.. 4 Inserting the battery. 5 Setting up the transmitter.. 6

Operating the system

Listening to a program.. 8 The effective area of the transmitter.. 10 Replacing the ear pads.. 10

Additional information

Specifications. 11 Precautions.. 12 Troubleshooting. 13

N Getting started

The headphones MDR-IF140 (1)

Unpacking

Check that you have the following items before using the headphones: The transmitter TMR-IF130 (1)

AC power adaptor (1)

Connecting cord (1) (phono plugs h stereo mini plug)
Unimatch plug adaptor (1) (stereo mini jack h stereo phone plug)

Inserting the battery

Open the battery compartment lid of the left housing.
Close the battery compartment lid.

Battery life Battery

Sony alkaline battery LR03/ AM-4(N)

Approx. hours*1

60 hours*2
Insert the size AAA dry battery into the battery compartment matching 3 terminal on the battery to 3 in the compartment.
Sony manganese battery R03/UM-4 (NU)

28 hours*2

*1 at 1 kHz, 1 mW+1 mW output *2 Time stated above may vary, depending on the temperature or conditions of use.
Notes on Batteries Do not charge a dry battery. Do not carry a 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 to replace the battery 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.
Setting up the transmitter
The transmitter is equipped with two input jacks, which allows for connection to the specified output jacks: PHONES IN to the headphone jack, and LINE IN to the LINE OUT jacks of your connected equipment.
A When connecting to a headphones jack
Connect to the PNONES IN jack on the transmitter.

Transmitter

to PHONES IN jacks

LINE IN

PHONES IN

DC IN 9V

Connect the transmitter to an audio/video component.
Select method A or B, according to the output jack type of the AV component you use.

Right channel (red)

Left channel (white)
Connecting cord (supplied) to headphone jack (stereo mini jack)
Unimatch plug adaptor (supplied)
to headphone jack (stereo phone jack) WALKMAN*, TV, VCR, etc.
* WALKMAN is a registered trademark of Sony Corporation to represent Headphone Stereo products.
B When connecting to any jacks other than the headphones jack
Connect to the LINE IN jacks on the transmitter.
Connect the transmitter to the power source.

to an AC outlet

to LINE IN jack

to DC IN 9 V jack

AC power adaptor (supplied)
Connecting cord (supplied)
to any jacks other than headphone jack

Stereo, TV, VCR, etc.

Note If your AV component has a stereo mini jack (LINE OUT), connect the stereo mini jack to LINE IN jack of the transmitter by using the connecting cord RK-G136 sold separately. If you connect LINE OUT jack of your AV component to PHONES IN jack of the transmitter, volume may be too low.
(Continued) Getting started

N Operating the system

Notes Do not connect to the PHONES IN jack and LINE IN jack at the same time. If you connect two audio/visual components to both jacks at the same time, both of the audio signals may result in mixed output. Use only the supplied AC power adaptor. Do not use any other AC power adaptor.

Unified polarity plug

Listening to a program
Before listening To prevent your ears from being damaged, first lower the volume.
When you connect the connecting cord directly to an earphone jack (monaural mini jack), the audio signal may not be output through the right channel. In such a case, use the separately sold PC-236MS plug adaptor (stereo mini jack h monaural mini plug) between the connecting cord and the earphone jack.
Turn on the audio/video component connected to the transmitter.
When the audio signal 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 component as high as possible but not so high that the audio signal becomes distorted.

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.
Start playback of the component connected to the transmitter. Adjust the volume.
Sound is automatically muted if noise increases Mute function 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. If no audio signal is input for more than approximately 5 minutes The transmitter turns off automatically.

Note The brightness of the infrared emitters may not be uniform, however, this is not a malfunction.
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. In this case, move nearer toward the transmitter or orient the infrared emitters on the left housing towards the transmitter. After listening to the programs Take off the headphones, and then turn off the power.
Note You may hear some noise when you disconnect the AC power adaptor from the transmitter before taking off the headphones.
The effective area of the transmitter
The illustration below shows the approximate area covered by the infrared rays emitted from the transmitter.

Replacing the ear pads

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.
Transmitter Infrared ray Approx. 3 m (118 1/8 in.)

Approx. 7 m (23 ft.)

Approx. 3 m (118 1/8 in.)
Remove the old ear pad by pulling it off.
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 headphones and the transmitter, sound may be interrupted. These phenomena are inherent to infrared ray communication and do not mean that there is a problem with the system itself. Do not cover the infrared sensors with your hands or hair. When you use the headphones inside the area in the illustration above, the transmitter can be placed in front, behind or by the side of you. The noise you may hear through the headphones may vary depending on the transmitter position and room conditions. It is recommended that you place the transmitter in a location that produces the clearest sound. Do not use this system in areas exposed to direct sunlight or strong light. The sound may be interrupted. Plasma displays may interfere with normal operation of this system.
Place the new ear pad around the housing.

N Additional information

Headphone MDR-IF140

Specifications

General
Modulation system Frequency modulation Carrier frequency Right 2.8 MHz Left 2.3 MHz Frequency response 18 22,000 Hz

Power source Mass

Dry battery (size AAA) Approx. 125 g (4.41 oz.) including battery

Supplied accessories

AC power adaptor (1) Connecting cord (approx. 1m, stereo mini plug 1 y phono plug 2) (1) Unimatch plug adaptor (stereo mini jack y stereo phone plug) (1) Operating instructions (1)

Transmitter TMR-IF130

Power source DC IN 9 V jack accepts power supplied from the AC power adaptor for use on the following voltages:

Optional accessories

If you connect with a stereo mini jack (LINE OUT ) RK-G136 (1.5 m, stereo mini plug 1 y stereo mini plug 1) If sound is not output through the right channel when the supplied connecting cord is connected to the earphone jack. Plug adaptor PC-236MS (stereo mini jack y monaural mini plug) If you have lost the supplied plug adaptor. Plug adaptor PC-234S (stereo mini jack y stereo phone plug) If you have lost the supplied connecting cord. RK-G129 (1.5 m, stereo mini plug y phono plug 2) Design and specifications are subject to change without notice.

Where purchased

U.S.A. U.K. European countries Japan (except for Japanese domesitic model) Other countries Audio input Dimensions

Operating voltage

120 V AC, 60 Hz 230 V AC, 50 Hz 230 V AC, 50 Hz 110 V/120 V/220 V/ 240 V AC, 50/60 Hz V AC, 50/60 Hz or 120 V AC, 60 Hz Phono jacks/stereo mini jack Approx. 72 mm (1/3/4 in.) (w/h/d) Approx. 75 g (2.7 oz.)

Caring for others

Precautions
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 and remove the battery to avoid damage caused by battery leakage and subsequent corrosion. Do not leave the cordless stereo headphones system in a location subject to direct sunlight, heat or moisture (It is recommended to use the headphones at a temperature of between 5C and 35C (between 41F and 104F).) Do not drop, hit or otherwise subject the transmitter or headphones to strong shocks of any kind. This could damage the product.
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 nearest Sony dealer. Be sure to bring the headphones and the transmitter to Sony dealer when requiring repair work.

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, lower the volume or discontinue use.

Troubleshooting

No sound/Muffled sound
, Turn on the transmitter first, and then put on the headphones. , Check the connection of the audio/ video equipment or the AC power adaptor. , 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 power indicator is still off after replacing the battery, take the headphones to a Sony dealer. , If you connect the LINE OUT jacks of your connected equipment to the PHONES IN jacks of the transmitter, volume may be too low. Use the LINE IN jacks of the transmitter instead. See Setting up the transmitter.
, If you connect the headphone jacks of your connected equipment to the LINE IN jack of the transmitter, sound may be distorted when raising the volume. Use the PHONES IN jacks of the transmitter instead. See 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 in 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. , 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. If the power indicator is still off after replacing the battery, take the headphones to a Sony dealer. , When you have another transmitter, check if more than one transmitters are used at the same time. Turn off other transmitter or move to a place outside the range of this transmitter.

Distorted sound

, If the transmitter is connected to the headphones jack, lower 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. If the power indicator is still off after replacing the battery, take the headphones to a Sony dealer.

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ea PHONES IN

e epea ay/eaapaype.
Bepe cc A B acc a x ea cye ay- eaapayp.

e aa (e)

pa aa (pac)
Cee yp (paaec) ea x ee (cepee)

epca epex (paaec)

ey x ee (cepe aye) WALKMAN*, eep, ea .
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B p e ea e x ee

e ea LINE IN a epeae.

e epea cy a.

ey DC IN 9 V

Aaep epee a (x e)

ey LINE IN

Cee yp (paaec)

ey, pe ea x ee cepeaapaypa, eep, ea .
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(pee a ceye cp.) Haa pa

N Paa c cce
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y c cae

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