Battery cannot be charged/CHG
How to use
Effective area of the
transmitter
Using the headphones
with separately-sold dry
batteries
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.
Insert the supplied rechargeable battery BP-HP550-11 into the left housing of the headphones.
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.
Observe the correct polarity when installing battery.
1
2
4
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.
Top view
Approx. 3 m (10 ft)
Cordless Stereo
Headphone System
Battery life
Battery
Operating Instructions
Approx. usage time1)
Approx. 8 m
(26 ft)
Manual de instrucciones
50 hours2)
Sony alkaline battery LR03
Precautions
Transmitter
Side view
Insert the
end first.
1) at 1 kHz, 0.1 mW + 0.1 mW output
2) Time may vary, depending on the temperature or conditions
of use.
– 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.
90°
Rechargeable nickel-metal hydride
battery BP-HP550-11 (supplied)
Note
Approx. 3 m (10 ft)
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.
– 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.
4-429-158-14(1)
Connect the AC adaptor.
Charge the headphones.
Approx. 8 m
(26 ft)
3
©2012 Sony Corporation Printed in China
To AC
outlet
Transmitter
Tips for connection
MDR-IF245RK
– 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.
(Red)
Complete when
indicator turns off.
(Off)
Notes on headphones
90°
To reduce the risk of hearing damage
– 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.
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.
– 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.
English
Cordless Stereo Headphone System
Contact
points
Caring for others
Checking the included
items
Features
Keep the volume at a moderate level. This will allow you to hear
outside sounds and to be considerate to the people around you.
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:
Tips for volume setting
If you have any questions or problems concerning the system
that are not covered in this manual, please consult your nearest
Sony dealer.
– 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.
Contact
pins
– 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.
Be sure to bring the headphones and the transmitter to the Sony
dealer when requiring repair work.
– 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.
– Battery is automatically charged by placing the headphones
on the transmitter.
Connect the A/V component, following hookup or below.
Transmitter TMR-IF245R (1)
– 40 mm driver units for powerful, expressive sound.
– Muting function reduces noise disturbance.
– Self-adjusting headband mechanism eliminating the need for
headband adjustment.
Specifications
Using the headphone jack of the A/V component
Replacing the earpads
– The brightness of the infrared emitters may not be uniform;
however, this is not a malfunction.
Transmitter (TMR-IF245R)
Headphones MDR-IF245R (1)
Modulation
FM stereo
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.
– Up to 8 meters (26 feet) reception range.
Carrier frequency Right 2.8 MHz
Left 2.3 MHz
Frequency response
10 Hz – 20,000 Hz
About muting function
Headphone jack
(Stereo mini jack)
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.
AC adaptor (1)
Connecting cable (stereo mini
plug pin plug × 2), 1 m (1)
Audio inputs
Power requirements
Dimensions
Mass
Pin jacks (left/right)
Stereo mini jack
R (red)
L (white)
Stereo mini
plug
DC 12 V (from the supplied AC adaptor)
TV, Digital music player, etc.
Approx. 140 mm × 60 mm × 105 mm
Rechargeable nickel-metal
hydride battery
(BP-HP550-11) (1)
(5 1/2 in × 2 3/8 in × 4 1/7 in) (w/h/d)
Approx. 200 g (7.06 oz)
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.
Headphones (MDR-IF245R)
1
Remove the old earpad
by pulling it off.
2
Place the new earpad
around the housing.
Frequency response
Using the audio out (L/R) jacks of the A/V component
10 Hz – 24,000 Hz
Power source
Supplied rechargeable nickel-metal hydride
battery BP-HP550-11, or commercially
available (size AAA) dry batteries
Audio out
(L/R) jacks
WARNING
L (white)
R (red)
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.
Troubleshooting
Mass
Approx. 200 g (7.06 oz) including battery
If you run into any problems using this system, use the following
checklist. Should any problem persist, consult your nearest Sony
dealer.
To reduce the risk of fire or electric shock, do not expose this
apparatus to rain or moisture.
Note
Included items
Transmitter TMR-IF245R
Headphones MDR-IF245R
AC adaptor (12 V) (1)
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:
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.
Stereo mini plug
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.
No sound/Low sound
– Turn on the headphones.
Connecting cable (stereo mini plug pin plug × 2), 1 m
– Check the connection of the A/V component or the AC
adaptor.
(39 3/8 in) (1)
Stereo system, Blu-ray Disc player, DVD player, TV*, etc.
* In case of no headphone jack.
Do not expose the batteries (battery pack or batteries installed)
to excessive heat such as sunshine, fire or the like for a long time.
Rechargeable nickel-metal hydride battery BP-HP550-11
(550 mAh min) (1)
Card warranty (1)
– 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.
To avoid electrical shock, do not open the cabinet. Refer
servicing to qualified personnel only.
Charging and usage time
Depending on the remaining battery status, it takes approx. 30
minutes to 7 hours to recharge.
Operating Instructions (this manual) (1)
If you want to receive audio on the headphones while at the same time hearing audio from the television speakers:
connect the transmitter to your Cable Box/Satellite Box rather than your television.
Do not install the appliance in a confined space, such as a
bookcase or built-in cabinet.
Design and specifications are subject to change without notice.
Approx. charging time
Approx. usage time1)
– Check that there is no object between the transmitter and the
headphones.
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.
7 hours2)
Wear the headphones.
Start playback of the A/V component.
28 hours3)
– Reorient or relocate the receiving antenna.
– 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.
– 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.
5
6
Before listening
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 reduce the risk of hearing damage, first lower the volume.
Excessive sound pressure from earphones and headphones can
cause hearing loss.
– Consult the dealer or an experienced radio/ TV technician for
help.
Tactile dot
Up
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.
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.
Distorted or intermittent sound
(sometimes with noise)
– Use the headphones near the transmitter, or change the
position of the transmitter.
Down
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.
– If you connect the transmitter to an A/V component using the
headphone jack, lower the volume level on the connected A/V
component within the range where the sound is not distorted.
– 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.
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.
RECYCLING NICKEL METAL HYDRIDE
BATTERIES
Charge the headphones if the POWER indicator turns off, dims,
flashes, or the sound becomes distorted or noisy.
Tactile dot
Loud background noise
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.
– Use the headphones near the transmitter, or change the
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.
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.
Lower volume
– Check that the infrared sensors on the headphones are not
Unified
polarity plug
About the infrared sensors
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.
For more information regarding recycling of rechargeable
batteries, call toll free
covered with your hands or hair.
The infrared sensors of the headphones are located as illustrated below.
– 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.
– 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.
– 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.
– 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 battery capacity may decrease if the headphones are
turned on and placed on the transmitter with the AC adaptor
disconnected.
Caution: Do not handle damaged or leaking Nickel Metal
Hydride batteries.
– 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.
– Use the transmitter in a position facing the headphones.
– Charge in an environmental temperature of between 5 °C and
The sound cuts off
– 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.
35 °C (between 41 °F and 95 °F).
– 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.
– 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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