Sony Wireless Headphone MDR-RF860RK Leaflet

© 2007   Sony Corporation     Printed in China

Operating Instructions

3-095-629-11(1)

To reduce the risk of fire or electric shock, 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.
Connect AC power adaptor to an easily accessible AC
outlet. Should you notice an abnormality in AC power
adaptor, disconnect it from the AC outlet
immediately.
Do not install the appliance in a confined space, such
as a bookcase or built-in cabinet.
Do not expose the battery to excessive heat such as
direct sunlight, fire or the like.

Hereby, Sony Corp., declares that this equipment is in
compliance with the essential requirements and other
relevant provisions of Directive 1999/5/EC.
For details, please access the following URL :
http://www.compliance.sony.de/

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
Civic Office, your household waste disposal service or
the shop where you purchased the product.

Thank you for purchasing the Sony MDR-RF840RK/
RF860RK Wireless Stereo Headphone System. Before
operating the unit, please read this manual thoroughly
and retain it for future reference.
Some features are:
• A compact transmitter enables simple charging by a

contactless charge method that requires no terminals
by the electromagnetic induction.
Just by placing the headphones on the transmitter,
the headphone battery can be charged.

• Automatic ON/OFF function on headphones to

preserve battery power.

• Noise reduction system to reproduce a clear sound

with minimum transmission noise. (MDR-RF860RK
only)

• Wireless system that allows you to listen to a

program free from the restriction of a cord

• High fidelity sound reproduction
• Easy connection with TV and HiFi Audio system

equipment

• Up to 100 meters reception range
• Volume control function on the headphones.
• Comfortable Circum-aural headphone with self

adjusting head band.

This system utilizes very high frequency signals in the
800 MHz band so the receiving performance may
deteriorate due to the surroundings.  The following
examples illustrate conditions that may reduce the
reception range or cause interference.
• Inside a building with walls containing steel beams.
• An area with many steel file cabinets, etc.
• An area with many electrical appliances capable of

generating electromagnetic fields.

• The transmitter is placed on a metal instrument.
• An area facing a roadway.
• Noise or interfering signals exist in the surroundings

due to radio transceivers in trucks, etc.

• Noise or interfering signals exist in the surroundings

owing to wireless communication systems installed
along roadways.

N

Check that you have the following items:

• The headphones (1)

• The transmitter (1)

• AC power adaptor (1)

• Connecting cord (1) (phono plugs 

y stereo

miniplug), 1 m

• Unimatch plug adaptor (1) (stereo mini jack 

y

stereo phone plug)

• Rechargeable nickel-metal hydride battery

BP-HP550-11 (1)

The supplied rechargeable nickel-metal hydride
battery is not charged from the first time you use it. Be
sure to charge it before use.
To charge the headphones, place them on the
transmitter.

The battery compartment lid comes off.

L

Insert the supplied rechargeable nickel-
metal hydride battery into the battery
compartment matching the 3 terminal on
the battery to the 3 mark in the
compartment.

Do not use rechargeable battery other than the
supplied one.

Please place the headphones on the transmitter so
that the triangle arrow would be matched. If the
headphones are not properly placed, it will not be
charged.
Charging will take about 16 hours, after which the
POWER/CHG indicator will go off.

This system employs a contactless charge method that
requires no terminals by the electromagnetic induction.

• Do not leave any metallic objects (coin, clip, etc.)

near the transmitter’s charging point. The
transmitter and the metal might become hot and it is
dangerous.

• Do not leave any objects susceptible to magnetism

(cash cards, floppy disks with magnetic coding, etc.)
near the system. Exposure to the transmitter’s
electromagnetic field may render them unusable.

• Do not place a radio near the system. A noise may be

heard from the radio. In such a case, change the
angle of the radio or move away from the system so
that a noise is not heard.

Check if the right and left headphones are rested on
the transmitter correctly. Remove the headphones and
replace them on the transmitter again so that the
POWER/CHG indicator lights in red.

Place the headphones on the transmitter after use.
Since the built-in timer recognizes when charging is
complete, there is no need to remove the headphones
from the transmitter after charging.

• The transmitter automatically stops sending RF

signals while charging the battery.

• This system is designed to charge only the supplied

rechargeable battery type BP-HP550-11 for safety.
Note that other types of rechargeable batteries
cannot be charged with this system.

• If dry batteries are installed, they cannot be charged.
• Do not attempt to use the supplied BP-HP550-11

rechargeable battery for other components. They are
for use with this system only.

• Charge in an environmental temperature of

between 0 °C and 40 °C (between 32 °F and 104 °F).

1 hour

60 minutes*

3

40 minutes*

3

16 hours*

2

18 hours*

3

14 hours*

3

*

1

at 1 kHz, 1 mW+1 mW output

*

2

hours required to fully charge an empty battery

*

3

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

Commercially available (size AAA) dry batteries can also
be used to power the headphones. Install the batteries in
the same manner as described in steps 1 through 3 of
“Charging the supplied rechargeable battery.”
When dry batteries are installed, the battery charge
function will not be activated.

 (Using Sony alkaline batteries LR03/AM-4 (N))

MDR-RF840RK

28 hours*

2

MDR-RF860RK

22 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.

• 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
accidentally come into contact with metallic objects.

• If you are not going to use the unit for a long time,

remove the batteries to avoid damage from battery
leakage or corrosion.

Pull up the self-adjusting band and check the POWER
indicator located on the right housing. The battery is
still serviceable when the indicator lights in red.
Charge the rechargeable battery or install new dry
batteries if the POWER indicator light dims, flashes, or
the sound becomes distorted or noisy.

The rechargeable nickel-metal hydride battery should
be replaced with new one when they last only half the
expected time after a proper recharging. The
rechargeable battery type 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.

Select one of the hookups below depending on the
jack type:

A

 To connect to a headphones jack

B

 To connect to LINE OUT or REC OUT

* “WALKMAN” and “WALKMAN” logo are

registered trademarks of Sony Corporation.

• Use only the supplied AC power adaptor. Do not

use any other AC power adaptor.

• When the transmitter is placed on or near a TV, it

may pick up a noise. In such a case, place the
transmitter away from the TV.

• If the connected equipment has the AVLS

(Automatic Volume Limiter System) function, be
sure to turn the function off when using the
transmitter. Otherwise, you will have to turn up the
volume of the headphones, and that may cause
noise.

N

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

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 becomes distorted.

The transmitter’s POWER/CHG indicator lights
up green.

When you put on the headphones, the
headphone’s power turns on automatically.
The POWER indicator on the right housing glows
red.
Be sure to put the right housing R on your right
ear and the left housing L on your left ear.
Wear the headphones vertically on your head so
that auto power on function is properly activated.

A

 MDR-RF840RK

Select the channel to that of the transmitter with
the TUNING selector on the right housing of the
headphones.
When tuning has completed, turn up the volume
to a moderate level with the VOLUME control on
the right housing.

R

B

 MDR-RF860RK

Press the TUNING button briefly for automatic
tuning of the headphones. If you do not receive a
clear audio signal, press it again.
When tuning has completed, turn up the volume
to a moderate level with the VOLUME control on
the right housing.

R

The transmitter starts sending RF signals
automatically when it detects an audio signal from the
connected equipment.
If it does not detect an audio signal for more than
about 4 minutes, the transmitter will stop sending RF
signals, and the POWER/CHG indicator will turn off.
When the transmitter receives an audio signal again, it
starts sending the RF signals, and the POWER/CHG
indicator will light up green again.
If the audio signal is very weak, the transmitter does
not send RF signals. If the transmitter is connected to a
headphone jack, make sure the volume of the
equipment connected is set to 5 - 6 or higher.
You may not hear the beginning of the sound from the
headphones until the transmitter starts sending the RF
signals after detecting an audio signal.

Do not pull up the self-adjusting band when not in
use, as this will consume the battery power.

• If hiss is heard, move closer to the transmitter.
• You may hear some noise when you disconnect the

AC power adaptor from the transmitter before turn
off the headphones.

The transmitter unit compresses the audio signal and
converts it to RF signal. The headphones unit converts
the received RF signal to an audio signal and
decompresses it.
This process reduces noise picked up during
transmission.

1

2

34

5

1

The transmitter unit compresses the audio signals
dynamic range, then converts it to RF signal.

2

Noise may occur due to long distance
transmission, etc.

3

The headphones unit converts the RF signal to an
audio signal.

4

Noise may occur during conversion.

5

Decompression of the audio signals dynamic range
reduces the noise level and improves the
S/N (signal-to-noise) ratio.

The optimum distance is up to approximately 100 m
without the system picking up some interference.
However, the distance may vary depending on the
surroundings and environment. If the system picks up
some noise within the above mentioned distance,
reduce the distance between the transmitter unit and
the headphones, or select another channel.

• When you use the headphones inside the effective

areas of the transmitter, the transmitter can be
placed in any direction from the listener.

• Even within the signal reception area, there are some

spots (dead spots) where the RF signal cannot be
received.  This characteristics is inherent to RF
signals, and does not indicate malfunction. By
slightly moving the transmitter, location of the dead
spot can be changed.

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.

Hang the edge of the ear pad on one side of the
driver unit’s groove edge, then turn the edge of
ear pad around the driver unit as illustrated
below.
When the ear pad is securely inserted into the
groove, adjust the ear pad to the vertical position.

N

• If the transmitter is not to be used for a long period of

time, disconnect the AC power adaptor from the AC
outlet by holding the plug. Do not pull on the cord.

• Do not leave the wireless stereo headphone system

in a location subject to direct sunlight, heat or
moisture.

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.

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.

Härmed intygar Sony Corp. att denna utrustning står I
överensstämmelse med de väsentliga egenskapskrav
och övriga relevanta bestämmelser som framgår av
direktiv 1999/5/EG. För ytterligare information gå in
på följande hemsida:
http://www.compliance.sony.de/

Undertegnede, Sony Corp. erklærer herved, at
følgende udstyr overholder de væsentlige krav og
øvrige relevante krav i Direktiv 1999/5/EF. For
yderligere information gå ind på følgende
hjemmeside: http://www.compliance.sony.de/

Sony Corp. vakuuttaa täten että tämä laite on
direktiivin 1999/5/EY oleellisten vaatimusten ja sitä
koskevien direktiivin muiden ehtojen mukainen.
Halutessasi lisätietoja käy osoitteessa:
http://www.compliance.sony.de/

Sony Corp. erklærer herved at utstyret er i samsvar
med de grunnleggende krav og øvrige relevante krav i
direktiv 1999/5/EF. Gå til denne URL-en for mer
informasjon: http://www.compliance.sony.de/

Με την παρούσα η Sony Corp. ∆ηλώνει τι αυτς
ο εξοπλισµς συµµορφώνεται προς της ουσιώδεις
απαιτήσεις και της λοιπές σχετικές διατάξεις της
οδηγίας 1999/5/EK. Για λεπτοµέρειες
παρακαλούµε πως ελέγξετε την ακλουθη
σελίδα του διαδικτύου:
http://www.compliance.sony.de/

Par la présente, Sony Corp. déclare que ce type
d’appareil est conforme aux exigences essentielles et
aux autres dispositions pertinentes de la directive
1999/5/CE. Pour toute information complémentaire,
veuillez consultez l’URL suivante :
http://www.compliance.sony.de/

Hiermit erklärt Sony Corp., dass sich dieses Gerät in
Übereinstimmung mit den grundlegenden
Anforderungen und den anderen relevanten
Vorschriften der Richtlinie 1999/5/EG befindet.
Weitere Informationen erhältlich unter:
http://www.compliance.sony.de/

Por medio de la presente, Sony Corp. declara que el
equipo cumple con los requisitos esenciales y
cualesquiera otras disposiciones aplicables o exigibles
de la Directiva 1999/5/CE. Para mayor información,
por favor consulte el siguiente  URL:
http://www.compliance.sony.de/

Hierbij verklaart Sony Corp. dat dit apparaat in
overeenstemming is met de essentiële eisen en de
andere relevante bepalingen van richtlijn 1999/5/EG.
Nadere informatie kunt u vinden op:
http://www.compliance.sony.de/

Con la presente Sony Corp. dichiara che questo
apparecchio è conforme ai requisiti essenziali ed alle
altre disposizioni pertinenti stabilite dalla direttiva
1999/5/CE. Per ulteriori dettagli, si prega di
consultare il seguente URL:
http://www.compliance.sony.de/

A Sony Corp. declara que este equipamento está
conforme com os requisitos essenciais e outras
provisões da Directiva 1999/5/CE. Para mais
informações, por favor consulte a seguinte URL:
http://www.compliance.sony.de/

MDR-RF840RK MDR-RF860RK

L

R

*,

, 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.

, Change the radio frequency with the

CHANNEL selector switch on the transmitter,
then set to the same radio frequency with the
TUNING selector (or TUNING button) on the
right housing of the headphones.

, The mute function is activated.

• Use the headphones near the transmitter.

, The headphones’ POWER indicator light turns

off, dims, flashes, or sound becomes distorted
or noisy.
• Charge the rechargeable battery if it is weak,

or replace alkaline batteries with new ones. If
the POWER indicator is still off after charging
the battery, take the headphones to a Sony
dealer.

, If the transmitter is connected to the

headphones jack, turn down the volume on the
connected audio/video equipment.

, Change the radio frequency with the

CHANNEL selector switch on the transmitter,
then set to the same radio frequency with the
TUNING selector (or TUNING button) on the
right housing of the headphones.

, The headphones’ POWER indicator light turns

off, dims, flashes, or sound becomes distorted
or noisy.
• Charge the rechargeable battery if it is weak,

or replace alkaline batteries with new ones. If
the POWER indicator is still off after charging
the battery, take the headphones to a Sony
dealer.

, Move closer to the transmitter. As you move

away from the transmitter, more noise is likely
to be heard.

, If the transmitter is connected to the

headphones jack, turn up the volume of the
connected audio/video equipment.

, Change the radio frequency with the

CHANNEL selector switch on the transmitter,
then set to the same radio frequency with the
TUNING selector (or TUNING button) on the
right housing of the headphones.

, The headphones’ POWER indicator light turns

off, dims, flashes, or sound becomes distorted
or noisy.
• Charge the rechargeable battery if it is weak,

or replace alkaline batteries with new ones. If
the POWER indicator is still off after charging
the battery, take the headphones to a Sony
dealer.

Carrier frequency

863.52 MHz, 864.02 MHz, 864.52 MHz

Channel

Ch1, Ch2, Ch3

Modulation

FM stereo

Frequency response

MDR-RF840R: 20 – 20,000 Hz
MDR-RF860R: 10 – 22,000 Hz

Power source DC 12 V: supplied AC power adaptor
Audio input

Phono jacks, stereo mini jack

Dimensions

Approx. 216 

× 105 × 96 mm

(8 

5

/

8

 

× 4 

1

/

4

 

× 3 

7

/

8

 in)  (w/h/d)

Mass

Approx. 220 g (7.77 oz)

Rated power consumption

3 W

Power source Supplied rechargeable nickel-metal

hydride battery BP-HP550-11 or
commercially available (size AAA) dry
batteries

Mass

Approx. 300 g (10.59 oz) incl. Battery

Design and specifications are subject to change
without notice.

L

R