SONY MDR-RF855RK Wireless Stereo Headphone System Instruction Manual
- June 6, 2024
- Sony
Table of Contents
- WARNING
- Checking the included items
- Features
- How to use
- After use
- About sending RF signals
- Tips for charging
- Using the headphones with separately-sold dry batteries
- Tips for connection
- Tips for volume setting
- Tips for better reception
- Replacing the earpads
- Troubleshooting
- Precautions
- Specifications
- Included items
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Wireless Stereo
Headphone System
Operating Instructions
MDR-RF855RK
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.
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 the 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.
CAUTION
Risk of explosion if the battery is replaced by an incorrect type.
Do not expose the batteries (battery pack or batteries installed) to excessive
heat such as sunshine, fire or the like for a long time.
Do not subject the batteries to extreme low-temperature conditions that may
result in overheating and thermal runaway.
Do not dismantle, open or shred secondary cells or batteries. Do not expose
cells or batteries to heat or fire. Avoid storage in direct sunlight.
In the event of a cell leaking, do not allow the liquid to come in contact
with the skin or eyes. If contact has been made, wash the
affected area with copious amounts of water and seek medical advice.
Do not use any charger other than that specifically provided for use with the
equipment.
Secondary cells and batteries need to be charged before use. Always use the
correct charger and refer to the manufacturer’s instructions or equipment
manual for proper charging instructions.
After extended periods of storage, it may be necessary to charge and discharge
the cells or batteries several times to obtain maximum performance.
Dispose of properly.
High volume may affect your hearing.
The nameplate of the transmitter is located on the bottom exterior.
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) and
Switzerland.
Hereby, Sony Corporation declares that this equipment is in compliance with
Directive 2014/53/EU.
The full text of the EU declaration of conformity is available at the
following internet address: http://www.compliance.sony.de/
Hereby, Sony Corporation declares that this equipment is in compliance with
the UK relevant statutory requirements. The full text of the declaration of
conformity is available at the following internet address:
https://compliance.sony.co.uk
Disposal of waste batteries and electrical and electronic equipment
(applicable in the European Union and other countries with separate collection
systems)
This symbol on the product, the battery, or on the packaging indicates that
the product and the battery shall not be treated as household waste. On
certain batteries, this symbol might be used in combination with a chemical
symbol. The chemical symbol for lead (Pb) is added if the battery contains
more than 0.004% lead. By ensuring that these products and batteries are
disposed of correctly, you will help to prevent potential negative
consequences for the environment and human health which could be caused by
inappropriate waste handling. The recycling of the materials will help to
conserve natural resources.
In case of products that for safety, performance, or data integrity reasons
require a permanent connection with an incorporated battery, this battery
should be replaced by qualified service staff only. To ensure that the battery
and the electrical and electronic equipment will be treated properly, hand
over these products at end-of-life to the appropriate collection point for the
recycling of
electrical and electronic equipment. For all other batteries, please view the
section on how to remove the battery from the product safely. Hand the battery
over to the appropriate collection point for the recycling of waste batteries.
For more detailed information about recycling of this product or battery,
please contact your local Civic Office, your household waste disposal service
or the shop where you purchased the product or battery.
**Notice for customers: the following information is only applicable to
equipment sold in countries applying EU directives and/or the UK applying
relevant statutory requirements
This product has been manufactured by or on behalf of Sony Corporation.
EU and UK Importer: Sony Europe B.V.
Inquiries to the EU Importer or related to product compliance in Europe should
be sent to the manufacturer’s authorized representative, Sony Belgium,
bijkantoor van Sony Europe B.V.,
Da Vincilaan 7-D1, 1930 Zaventem, Belgium.
Inquiries to the UK Importer or related to product compliance in the UK should
be sent to the manufacturer’s authorized representative, Sony Europe B.V., The
Heights, Brooklands, Weybridge, Surrey KT13 0XW, United Kingdom.
This equipment has been tested and found to comply with the limits set out in
the EMC regulation using a connection cable shorter than 3 meters.
The unit is not waterproof. If water or foreign objects enter the unit, it may
result in fire or electric shock. If water or a foreign object enters the
unit, stop use immediately and consult your nearest Sony dealer. In
particular, be careful in the following cases.
– When using the unit around a sink, etc.
Be careful that the unit does not fall into a sink or container filled with
water.
– When using the unit in the rain or snow, or in humid locations
– When using the unit while you are sweaty
If you touch the unit with wet hands or put the unit in the pocket of a damp
article of clothing, the unit may get wet.
**
Note on static electricity
Static electricity accumulated in the body may cause mild tingling in your
ears. To reduce the effect, wear clothes made from natural materials, which
suppress the generation of static electricity.
For details on the effect of contact to the human body from the mobile phone
or other wireless devices connected to the unit, refer to the instruction
manual of the wireless device.
This product (including accessories) has a magnet(s) that may interfere with
pacemakers, programmable shunt valves for hydrocephalus treatment, or other
medical devices. Do not place this product close to persons who use such
medical devices.
Consult your doctor before using this product if you use any such medical
device.
Checking the included items
Features
Thank you for purchasing the Sony MDR-RF855RK Wireless Stereo Headphone
System. Before operating the unit, please read this manual thoroughly and
retain it for future reference.
Some features are:
– Wireless headphone system with long battery life and 100 m range
– Hassle-free recharging by placing the headphones on the transmitter
– 40 mm driver units for deep bass response
– Auto power on/off function for longer battery life
– Battery playback time up to 18 hrs with rechargeable batteries or 28 hrs
with Sony alkaline batteries
How to use
-
Insert the supplied rechargeable battery BP-HP550-11 into the left housing of the headphones.
Observe the correct polarity when installing the battery.
-
Connect the AC adaptor.
-
Charge the headphones
-
Connect the A/V component, following hookup
A
or B below.
Insert the plug firmly.
A
Using the headphone jack of the A/V component
B
Using the audio out (L/R) jacks of the A/V component
-
Wear the headphones.
Before listening
To reduce the risk of hearing damage, first lower the volume. -
Start playback of the A/V component.
The POWER/GREEN indicator of the transmitter lights up green.
-
Adjust the volume.
If you cannot receive a clear audio signal
First, change the radio frequency with the CHANNEL selector switch on the
transmitter, then change the radio frequency to that of the transmitter with
the TUNING switch on the headphones.
After use
The headphones automatically turn off when they are taken off (Auto power
on/off function).
About auto power on/off function
When you put on the headphones, the headphones’ power turns on automatically.
Wear the headphones vertically on your head so that the auto power on function
is properly activated.
The headphones automatically turn off when they are taken off.
Do not pull up the self-adjusting band when not in use, this will consume the
battery power.
About sending RF signals
The transmitter starts sending RF signals automatically when it detects an
audio signal from the connected component.
Note that;
– Noise may occur depending on the transmitter position and room conditions.
It is recommended to place the transmitter in a location that produces the
clearest sound.
– If the transmitter is placed on a metallic table, you may hear noise, or the
reception range may decrease. Do not place it on a metallic table.
If a low signal or no signal is input for about 5 minutes
If the low signal is input for about 5 minutes, the transmitter turns off
automatically*. If the volume of the connected A/V component is too low, the
transmitter may also turn off. When the low signal is input, the POWER/GREEN
indicator of the transmitter flashes green for 5 minutes, then turns off. 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.
The transmitter may also turn off if no signal is input for about 5 minutes.
The POWER/GREEN indicator of the transmitter flashes green for 5 minutes, then
turns off. The transmitter restarts after receiving an audio signal again.
- If signal noise is output from the connected A/V component, the transmitter may not turn off, even when no audio signal is input.
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/RED indicator does not light up red
– 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 may not be completed if the transmitter’s contact pin and
headphones’ contact point are dusty. Wipe them with a cotton bud, etc.
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 time1) |
---|---|
7 hours2) | 18 hours3) |
- at 1 kHz, 0.1 mW + 0.1 mW output
- hours required to fully charge an empty battery
- 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/RED indicator
lights up red, 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, pull up the self-
adjusting band, and check the POWER indicator. The
battery is still serviceable when the indicator lights up green. 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.
– 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 batteries cannot be
charged with this system.
– If dry batteries are installed, they cannot be charged.
– Do not attempt to use the supplied rechargeable battery BPHP550-11 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 the battery
life. 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.
Using the headphones with separately-sold dry batteries
Commercially available (LR03 (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 time1) |
---|---|
Sony alkaline battery LR03 (size AAA) | 28 hours2) |
- at 1 kHz, 0.1 mW + 0.1 mW output
- 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
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.
Tips for better reception
Receiving performance
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.
The effective area of the transmitter
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 and the headphones, or select
another channel.
– When you use the headphones inside the effective area 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 characteristic is inherent to RF
signals and does not indicate malfunction. By slightly moving the transmitter,
the location of the dead spot can be changed.
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.
-
Remove the old earpad by pulling it out of the groove on the housing.
-
Place the new earpad on the driver unit.
Hang the edge of the earpad on one side of the driver unit’s groove edge, then turn the edge of the earpad around the driver
the unit as illustrated below.
When the earpad is securely inserted into the groove, adjust the earpad to the vertical position.
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
– 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.
– Change the radio frequency with the CHANNEL selector on the transmitter,
then change the radio frequency to that of the transmitter with the TUNING
switch on 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)
– Use the headphones near the transmitter, or change the position of the
transmitter.
– Do not place the transmitter on a metallic table.
– 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.
– Change the radio frequency with the CHANNEL selector on the transmitter,
then change the radio frequency to that of the transmitter with the TUNING
switch on the headphones.
– 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.
Loud background noise
– 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.
– Do not place the transmitter on a metallic table.
– Use the headphones near the transmitter.
The POWER/GREEN indicator flashes green
– No signal or low signal is input. Start playback of the A/V component, or
raise the volume of the connected A/V component within the range where the
sound is not distorted, otherwise, the transmitter will turn off. If no signal
or low signal is input for about 5 minutes, the transmitter turns off
automatically.
The sound cuts off
– The transmitter turns off if no signal or low signal is input for 5 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.
The battery cannot be charged/CHG/RED indicator flashes red or does not
light up red
– 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/RED indicator does not light up red even though you put the
headphones on the transmitter and wait for a while, it may be the end of the
battery life. You can order the supplied rechargeable battery BP-HP550-11 from
the store where you purchased this system, or at your nearest Sony dealer.
– Charging may not be completed if the transmitter’s contact pin and
headphones’ contact point are dusty. Wipe them with a cotton bud, etc.
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.
– 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
RF stereo transmitter (TMR-RF855R)
Modulation: FM stereo
Operating frequency: 863.0 MHz – 865.0 MHz
Maximum output power: < 4 mW
Channel: Ch1, Ch2, Ch3
Transmission distance: Approx. 100 m of longest
Audio inputs: Pin jacks (left/right)
Stereo mini-jack
Power requirements: DC 12 V (from the supplied AC adaptor)
Dimensions: Approx. 180 mm × 94 mm × 126 mm (w/h/d)
Mass: Approx. 310 g
Rated power consumption: 3.0 W
Operating temperature: 5°C to 35°C (41°F to 95°F)
Wireless stereo headphones (MDR-RF855R)
Frequency response: 10 Hz – 22,000 Hz
Power source: Supplied rechargeable nickel-metal hydride battery BP-HP550-11,
or commercially available (LR03 (size AAA)) dry batteries
Mass: Approx. 280 g including battery
Operating temperature: 5°C to 35°C (41°F to 95°F)
Included items
RF stereo transmitter TMR-RF855R
Wireless stereo headphones MDR-RF855R
AC adaptor (12 V) (1)
Connecting cable (stereo mini-plug ↔ pin plug × 2), 1 m (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.
©2012 Sony Corporation Printed in China
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