Sony MDR-IF245RK Operating Instructions

Cordless Stereo

Headphone System

Operating Instructions

Manual de instrucciones

©2012 Sony Corporation

Printed in China

4-429-158-

13

(1)

MDR-IF245RK

English

Cordless Stereo Headphone System

WARNING

To reduce the risk of fire or electric shock, do not expose this

apparatus to rain or moisture.

To reduce the risk of fire or electric shock, do not expose this

apparatus to dripping or splashing, and do not place objects

filled with liquids, such as vases, on the apparatus.

Do not expose the batteries (battery pack or batteries installed)

to excessive heat such as sunshine, fire or the like for a long time.

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.

As the main plug of AC power adaptor is used to disconnect the

AC power adaptor from the mains, connect it to an easily

accessible AC outlet. Should you notice an abnormality in it,

disconnect it from the AC outlet immediately.

Excessive sound pressure from earphones and headphones can

cause hearing loss.

AC adaptor is not disconnected from the mains as long as it is

connected to the AC outlet, even if the unit itself has been

turned off.

The nameplate is located on the bottom exterior.

You are cautioned that any changes or modifications not

expressly approved in this manual could void your authority to

operate this equipment.

RECYCLING NICKEL METAL HYDRIDE

BATTERIES

Nickel Metal Hydride batteries are recyclable.

You can help preserve our environment by

returning your used rechargeable batteries

to the collection and recycling location

nearest you.

For more information regarding recycling of rechargeable

batteries, call toll free

1-800-822-8837, or visit http://www.rbrc.org/

Caution: Do not handle damaged or leaking Nickel Metal

Hydride batteries.

Note

This equipment has been tested and found to comply with the

limits for a Class B digital device, pursuant to Part 15 of the FCC

Rules. These limits are designed to provide reasonable

protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate

radio frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful

interference to radio communications.

However, there is no guarantee that interference will not occur

in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of

the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different

from that to which the receiver is connected.

Consult the dealer or an experienced radio/ TV technician for

help.

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How to use

Effective area of the

transmitter

The illustration below shows the approximate area covered by

the infrared rays emitted from the transmitter when you wear

the headphones and face the transmitter.

Transmitter

Top view

Approx. 3 m (10 ft)

Approx. 8 m

(26 ft)

90°

90°

Side view

Approx. 3 m (10 ft)

Approx. 8 m

(26 ft)

Transmitter

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 in infrared

ray communication and not a malfunction.

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. However, depending on

circumstances, the area covered by the infrared rays may be

smaller than illustrated.

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

other strong light. The sound may be interrupted.

Plasma displays may interfere with normal operation of this

system.

The brightness of the infrared emitters may not be uniform;

however, this is not a malfunction.

About muting 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. In such a case, this function mutes any

sound from the headphones to avoid potential ear damage as a

result of noise. Sound is automatically restored when you move

nearer the transmitter or remove the obstruction.

Tips for charging

Charge supplied battery first

The supplied rechargeable nickel-metal hydride battery is not

charged from the first time you use it. Be sure to charge them

before use.

About auto charge function

Placing the headphones on the transmitter automatically turns

them off, then charging starts. This eliminates the need for

turning on/off every time you wear and take off the headphones.

If CHG indicator is not lit

Check if the right and left headphones are rested on the

transmitter correctly. Take off the headphones and place them

on the transmitter again so that the headphones’ contact points

meet the transmitter’s contact pins.

Charging and usage time

Depending on the remaining battery status, it takes approx. 30

minutes to 7 hours to recharge.

Approx. charging time

Approx. usage time

1)

7 hours

2)

28 hours

3)

1) at 1 kHz, 0.1 mW + 0.1 mW output

2) hours required to fully charge an empty battery

3) Time may vary, depending on the temperature or conditions

of use.

To recharge supplied battery after use

Place the headphones on the transmitter after use. The CHG

indicator lights up, then charging starts.

When charging is complete, there is no need to remove the

headphones from the transmitter.

Remaining battery

To check the remaining battery charge of the headphones, turn

on the headphones, and check the POWER indicator. The battery

is still serviceable when the indicator lights up red.

Charge the headphones if the POWER indicator turns off, dims,

flashes, or the sound becomes distorted or noisy.

Notes

Insert the AC adaptor plug firmly.

Be sure to use the supplied AC adaptor. Using AC adaptors

with different plug polarity or other characteristics can cause

product failure.

Unified

polarity plug

The battery capacity may decrease if the headphones are

turned on and placed on the transmitter with the AC adaptor

disconnected.

The transmitter automatically turns off while charging the

battery.

This system is designed to charge only the supplied

rechargeable battery BP-HP550-11 for safety. Note that other

types of rechargeable battery cannot be charged with this

system.

If dry batteries are installed, they cannot be charged.

Do not attempt to use the supplied rechargeable battery BP-

HP550-11 for other components. It is for use with this system

only.

Charge in an environmental temperature of between 5 °C and

35 °C (between 41 °F and 95 °F).

When the battery life reduces to half, this may be the end of

battery lifetime. The supplied rechargeable battery BP-HP550-

11 is not commercially available. You can order the battery

from the store where you purchased this system, or at your

nearest Sony dealer.

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Using the headphones

with separately-sold dry

batteries

Commercially available (size AAA) dry batteries can also be used

to power the headphones. Install two batteries in the same

manner as described in step 1 of “How to use.”

When dry batteries are installed, the battery charge function is

not activated.

Battery life

Battery

Approx. usage time

1)

Sony alkaline battery LR03

50 hours

2)

1) at 1 kHz, 0.1 mW + 0.1 mW output

2) Time may vary, depending on the temperature or conditions

of use.

Note

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.

Tips for connection

Do not connect to the AUDIO IN 1 and AUDIO IN 2 jacks at the

same time. If you connect two A/V components to both jacks

at the same time, both of the audio signals may result in mixed

output.

When you connect the connecting cable directly to an

earphone jack (monaural mini jack), the audio signal may not

be output through the right channel.

Tips for volume setting

If you connect the transmitter to the headphone jack of the A/

V component, set the volume of the A/V component as high as

possible but not so high that the audio signal becomes

distorted.

When watching videos, be careful not to raise the volume too

high in quiet scenes. You may hurt your ears when a loud

scene is played.

Replacing the earpads

The earpads are replaceable. If the earpads become dirty or

worn out, replace them as illustrated below. The earpads are not

commercially available. You can order replacements from the

store where you purchased this system, or at your nearest Sony

dealer.



1

Remove the old earpad

by pulling it off.

2

Place the new earpad

around the housing.

Troubleshooting

If you run into any problems using this system, use the following

checklist. Should any problem persist, consult your nearest Sony

dealer.

No sound/Low sound

Turn on the headphones.

Check the connection of the A/V component or the AC

adaptor.

Check that the A/V component is turned on.

If you connect the transmitter to an A/V component using the

headphone jack, raise the volume level on the connected A/V

component within the range where the sound is not distorted.

Check that the infrared sensors of the headphones are not

covered with your hands or hair.

Check that there is no object between the transmitter and the

headphones.

Use the headphones near the transmitter, or change the

position of the transmitter.

Charge the supplied rechargeable battery, or replace dry

batteries with new ones. If the POWER indicator is still off after

charging, take the headphones to a Sony dealer.

Raise the headphone volume.

Distorted or intermittent sound

(sometimes with noise)


position of the transmitter.


headphone jack, lower the volume level on the connected A/V





Loud background noise


position of the transmitter. (As you move away from the

transmitter, more noise is likely to be heard. This is inherent in

infrared ray communication and not a malfunction.)

Check that there is no object between the transmitter and the

headphones.

Check that the infrared sensors on the headphones 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.


headphone jack, raise the volume level on the connected A/V





If 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.

The sound cuts off

The transmitter turns off if no signal

or low signal is input for

10 minutes. If you connect the transmitter to an A/V

component using the headphone jack, raise the volume level

on the connected A/V component within the range where the

sound is not distorted.

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Battery cannot be charged/CHG

indicator flashes, or does not light up

Check that the right/left of the headphones and transmitter

correspond, and put the headphones on the transmitter

correctly.

Install the supplied rechargeable nickel-metal hydride battery.

Dry batteries and rechargeable batteries other than the

supplied cannot be charged.

If the CHG indicator does not light up even though you put the

headphones on the transmitter and wait for a while, it may be

the end of battery lifetime. You can order the supplied

rechargeable battery BP-HP550-11 from the store where you

purchased this system, or at your nearest Sony dealer.

Precautions

When this system is not to be used for a long period of time,

disconnect the AC adaptor from the AC outlet holding the

plug, and remove the battery from the headphones to avoid

damage caused by battery leakage and subsequent corrosion.

Do not leave this system in a location subject to direct

sunlight, heat or moisture.

This system is guaranteed for use in the temperature range of

5 °C to 35 °C (41 °F to 95 °F).

You may hear some noise when you disconnect the AC

adaptor from the transmitter before taking off the

headphones.

Avoid exposure to temperature extremes, direct sunlight,

moisture, sand, dust or mechanical shock.

Notes on headphones

To reduce the risk of 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.

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 your nearest

Sony dealer.

Be sure to bring the headphones and the transmitter to the Sony

dealer when requiring repair work.

Specifications

Transmitter (TMR-IF245R)

Modulation

FM stereo

Carrier frequency

Right 2.8 MHz

Left 2.3 MHz

Frequency response

10 Hz – 20,000 Hz

Audio inputs

Pin jacks (left/right)

Stereo mini jack

Power requirements

DC 12 V (from the supplied AC adaptor)

Dimensions

Approx. 140 mm × 60 mm × 105 mm

(5

1

/

2

in × 2

3

/

8

in × 4

1

/

7

in) (w/h/d)

Mass

Approx. 200 g (7.06 oz)

Headphones (MDR-IF245R)

Frequency response

10 Hz – 24,000 Hz

Power source

Supplied rechargeable nickel-metal hydride

battery BP-HP550-11, or commercially

available (size AAA) dry batteries

Mass

Approx. 200 g (7.06 oz) including battery

Included items

Transmitter TMR-IF245R

Headphones MDR-IF245R

AC adaptor (12 V) (1)

Connecting cable (stereo mini plug



pin plug × 2), 1 m

(39

3

/

8

in) (1)

Rechargeable nickel-metal hydride battery BP-HP550-11

(550 mAh min) (1)

Card warranty (1)

Operating Instructions (this manual) (1)

Design and specifications are subject to change without notice.

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Transmitter TMR-IF245R (1)

AC adaptor (1)

Rechargeable nickel-metal

hydride battery

(BP-HP550-11) (1)

Headphones MDR-IF245R (1)

Connecting cable (stereo mini

plug



pin plug × 2), 1 m (1)

Checking the included

items

Features

Thank you for purchasing the Sony MDR-IF245RK Cordless Stereo

Headphone System. Before operating the unit, please read this

manual thoroughly and retain it for future reference.

Some features are:

Lightweight headphones for long time listening comfort.

Approx. 28 hours playback with supplied Ni-MH rechargeable

battery. AAA alkaline batteries (not supplied) can also be used

as alternative power.

Battery is automatically charged by placing the headphones

on the transmitter.

40 mm driver units for powerful, expressive sound.

Muting function reduces noise disturbance.

Self-adjusting headband mechanism eliminating the need for

headband adjustment.

Up to 8 meters (26 feet) reception range.

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Connect the AC adaptor.

Charge the headphones.

To AC

outlet

(Red)

(Off)

Complete when

indicator turns off.

Connect the A/V component, following hookup



or



below.



Using the headphone jack of the A/V component

L (white)

R (red)

Stereo mini plug

Headphone jack

(Stereo mini jack)

TV, Digital music player, etc.

L (white)

R (red)

Stereo mini plug

Audio out

(L/R) jacks

Stereo system, Blu-ray Disc player,

DVD player, etc.

About the infrared sensors

The infrared sensors of the headphones are located as illustrated below.

Use the transmitter in a position facing the headphones.

If the infrared sensors of one housing are covered by your hands (when adjusting the

volume, etc.), the muting function may be activated to reduce noise caused by

obstruction of the infrared rays. To restore sound, move nearer the transmitter, or

orient the sensor of the uncovered housing toward the transmitter.

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After use

Take off the headphones, then turn off the power.

If no signal or low signal is

input for about 10 minutes

When no signal is input for about 10 minutes, the

transmitter turns off automatically*. The infrared

emitters of the transmitter also turn off. The

transmitter restarts after receiving an audio signal

again.

The transmitter may also turn off if low signal is

input for about 10 minutes. In this case, raise the

volume of the connected A/V component within

the range where the sound is not distorted, then

lower the volume of the headphones.

* If signal noise is output from the connected A/V

component, the transmitter may not turn off,

even when no audio signal is input.

Start playback of the A/V component.

Wear the headphones.

Before listening

To reduce the risk of hearing damage, first lower the volume.



Using the audio out (L/R) jacks of the A/V component

Insert the supplied rechargeable battery BP-HP550-11 into the left housing of the headphones.

Observe the correct polarity when installing battery.

Contact

pins

Lower volume

Up

Tactile dot

Down

Rechargeable nickel-metal hydride

battery BP-HP550-11 (supplied)

Contact

points

Tactile dot

Insert the



end first.

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Sony MDR-IF245RK Operating Instructions

Sony MDR-IF245RK Manual

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