Sony MDR-RF915RK Operating Instructions

Wireless Stereo
Headphone System
Operating Instructions
Mode d'emploi
MDR-RF945RK
MDR-RF915RK
Sony Corporation © 2001
Printed in Korea
English
Note Welcome!
This device complies with RSS-210 of Industry
Thank you for purchasing the Sony
Canada. Operation is subject to the following two
MDR-RF945RK/RF915RK Wireless Stereo
conditions: (1) this device may not cause
Headphone System. Before operating the unit,
interference, and (2) this device must accept any
please read this manual thoroughly and retain it
interference, including interference that may cause
for future reference.
undesired operation of the device.
Some features are:
• Wireless system that allows you to listen to a
RECYCLING NICKEL-CADMIUM BATTERIES
program free from the restriction of a cord
• High fidelity sound reproduction
Nickel-Cadmium batteries
• A compact transmitter with an AC power
are recyclable. You can help
adaptor (supplied) enables simple charging of
preserve our environment by
the headphone battery. Just by placing the
returning your unwanted
headphones on the transmitter, headphone
batteries to your nearest
battery can be charged.
point for collection, recycling
• Comfortable Supra-aural headphones with self
or proper disposal.
adjusting head band
• Automatic ON/OFF function on headphones to
Note: In some areas the disposal of nickel-
preserve battery power
cadmium batteries in household or
business trash may be prohibited.
Notes on receiving
RBRC (Rechargeable Battery Recycling
Corporation) advises you about spent battery
performance
collection by the following phone number.
The system for this equipment utilizes very high
Call toll free number: 1-800-822-8837 (United
frequency signals in the 900 MHz band so the
States and Canada only)
receiving performance may deteriorate due to the
surroundings. The following examples illustrate
Caution: Do not handle damaged or leaking
conditions that may reduce the possible receiving
nickel-cadmium batteries. range or cause interference with reception.
• Inside a building with walls containing steel
beams.
• Area with many steel file cabinets, etc.
• Area with many electrical appliances capable of
generating electromagnetic noise.
• Transmitter is placed on a metal instrument.
• Area facing roadways.
• Noise or interfering signals exist in the
surroundings due to radio transceivers in trucks,
etc.
• Noise or interfering signals exist in the
surroundings due to wireless communication
systems installed along roadways.
3-233-607-21(1) C To connect to TV, etc.
N Getting started
Unpacking
Check that you have the following items:
Transmitter
• The headphones
• The transmitter
• AC power adaptor
• Unimatch plug adaptor (stereo mini jack t
stereo phone plug)
• Connecting cord (phono plugs y stereo mini
plug), 1 m
Setting up the
transmitter
1
Connect the transmitter to audio/video
equipment. Select one of the hookups
below depending on the jack type:
A To connect to a headphones jack
Transmitter
to AUDIO IN
A jacks
B R A L DC IN 9V
OFF ON 1 2 3
NOISE FILTER AUDIO IN CHANNEL
Left channel
Right channel
(white)
(red)
2
Connecting cord
(supplied)
Notes
• Use only the supplied AC power adaptor. Do not use
any other AC power adaptor.
Unimatch plug
to headphones
adaptor • When you connect the connecting cord directly to an
jack (stereo
(supplied)
mini jack) earphone jack, the audio signal will not be output
through the right channel. In such a case, use the
Discman, MD, separately sold PC-236HG plug adaptor.
to headphones
WALKMAN*, VCR, • If the connected equipment has the AVLS (Automatic
jack (stereo
etc. Volume Limiter System) function, be sure to turn the
phone jack)
function off when using the transmitter. Otherwise, you
will have to turn up the volume of the headphones, and
that may cause noise.
B To connect to LINE OUT or REC OUT
• Do not place the transmitter near a fluorescent lamp, etc.
jacks
when using the system.
* WALKMAN is a registered trademark of Sony
Transmitter
Corporation.
Charging the
headphone battery
B R A L DC IN 9V
OFF ON 1 2 3
NOISE FILTER AUDIO IN CHANNEL
Using the headphones for the first
to AUDIO IN time
B jack
When you use the headphones for the first time,
charge the battery in the following manner.
1
Connecting cord
(supplied)
Left channel Right channel
(white) (red)
to LINE OUT or REC
OUT jacks
Stereo system, VCR, etc.
2
Place the headphone on the transmitter such that
the charging pins on the transmitter engage the
charging contacts on the bottom of the right-hand
housing.
The charge indicator on the transmitter will light
in green to indicate that the battery is being
charged.
To recharge the headphone battery after
If noise occurs when the transmitter is use
Since little electric current is used for charging,
connected to the headphone jack of your
there is no need to worry about overcharging.
TV or VCR, set the NOISE FILTER switch
to ON.
Charging and using hours
Approx. charging Approx. using time*
to AUDIO IN
hours
A jack
MDR-
RF945RK
1 50 minutes
DC IN 9V
B R A L 1 2 3
OFF ON
NOISE FILTER AUDIO IN CHANNEL
24** 20 hours
Right channel Left channel * at 1 kHz, 1 mW + 1 mW output
** The hours required to fully charge empty battery
(red) (white)
N Operating the system
Connecting cord
Listening to a program
(supplied)
1
First turn on the audio/video equipment
and start playing.
to stereo mini jack
2
Remove the headphones from the
transmitter.
The transmitter's power indicator will
TV, etc.
light in red.
Notes
• If you connect the transmitter to LINE OUT or REC
OUT jack, do not set the NOISE FILTER switch to
ON. Otherwise, the volume will be limited.
• The NOISE FILTER switch effects the sound only in
cases such as connection diagram C. In diagrams A
and B, the switch has no effect.
• When the transmitter is placed on or near a TV, it
may pick up a noise. In such case, place the
transmitter away from the TV.
Connect the transmitter to an AC outlet
using the supplied AC power adaptor.
3
Select the radio frequency with the
Polarity of the plug
CHANNEL selector.
1 2 3
CHANNEL
4
When you put on the headphones the
headphone power turns on
automatically.
5
-A Turn up the volume to a moderate
level with the VOL control.
Connect the transmitter to a power
Press the TUNING button briefly for
source.
automatic tuning of the headphones.
If you do not receive a clear audio
Transmitter
signal, press it again.
to an AC outlet
A MDR-RF945RK
To DC IN
9 V jack
AC power adaptor
(supplied)
Place the headphones on the transmitter.
VOL control
5
-B Turn up the volume to a moderate
level with the VOL control, then tune
the headphones in to the frequency of
the transmitter with the TUNING
control until you can hear the audio
signal loud and clear.
B MDR-RF915RK
TUNING
control
VOL control
Try the above steps 3 and 5 until the
receiving performance becomes better.
Sending RF signals from the Transmitter
The transmitter starts sending the RF signals
Replacing the ear
automatically, when it detects audio signals from
pads
the equipment connected.
If it does not detect an audio signal for more than
approximately four minutes, the transmitter will
When the ear pads become dirty or damaged, you
stop sending RF signals, and the power indicator
can get replacements from your Sony dealer.
turns off.
Replace them as illustrated below.
When the transmitter receives an audio signal
1
again, it starts sending the RF signals, and the
Remove the old ear pad by pulling it out
MDR-
power indicator will light in red again.
of the groove on the housing.
RF915RK
If the audio signal is very weak, the transmitter
does not send RF signals. If the transmitter is
55 minutes
connected to a headphone jack, make sure the
23 hours
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.
Note
If the transmitter is connected to the headphones jack of
the source equipment, set the volume of that equipment
as high as possible without distorting the audio signal.
Auto power on/off function
When you remove the headphones from your
2
Place the new ear pad on the driver unit
head, the power turns off automatically. Do not
and insert the edge of the pad into the
allow the self adjusting band to be pulled up,
otherwise the headphones will be switched on. groove as illustrated.
The power turns on.
Note
If a hissing noise is heard move closer to the transmitter.
After listening to a program
Take the headphones off and rest them away on
Make sure that the entire edge of the ear pad is
the transmitter, and recharge them.
securely inserted into the groove.
Note
Do not hang the headphones by the self adjusting band, N Additional information
otherwise, the self adjusting band will be pulled up and
the headphones will be switched on.
Precautions
The effective areas of
• When the transmitter is not to be used for a long
the transmitter period of time, disconnect the AC power
adaptor from the AC outlet holding the plug. Do
not pull on the cord.
The optimum distance is up to approximately 150
• Do not leave the wireless stereo headphone
feet (46 m) without the system picking up some
system in a location subject to direct sunlight,
interference. However, the distance may vary
heat or moisture.
according to the surroundings and environment. If
the system picks up some noise while using it
Notes on headphones
within the above mentioned distance, reduce the
Preventing hearing damage
distance between the transmitter unit and the
Avoid using headphones at high volume. Hearing
headphones, or select the other channel.
experts advise against continuous, loud and
extended play. If you experience a ringing in your
Notes
ears, reduce the volume or discontinue use.
• When you use the headphones inside the effective areas
of the transmitter, the transmitter can be placed in any
direction from the listener.
Caring for others
• Even within the signal reception area, there are some
Keep the volume at a moderate level. This will
spots (dead spot) where the RF signal can not be
allow you to hear outside sounds and to be
received. This is a characteristic inherent to RF signals,
and does not indicate malfunction. By slightly moving
considerate to the people around you.
the transmitter, location of the dead spot can be
changed.
If you have any questions or problems concerning
the system that are not covered in this manual,
please consult the nearest Sony dealer.
Be sure to bring the headphones and the
transmitter to the Sony dealer when requiring
repair work.
Disposing of the headphones
Be sure to remove the built-in rechargeable
batteries from the headphones before you
dispose of the headphones.
First remove the left headphone's ear pad.
You will see six screws. Remove the six screws
and open the housing.
TUNING
button
Troubleshooting
No sound/Muffled sound
, Turn on the transmitter first, then put on the
headphones.
, 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.
, MDR-RF915RK:
Change the radio frequency with the CHANNEL
selector on the transmitter, then tune the
headphones with the TUNING control.
MDR-RF945RK:
Change the radio frequency with the CHANNEL
selector on the transmitter, then press the
TUNING button again.
, The mute function is activated.
Use the headphones near the transmitter.
, The headphones' POWER indicator light is weak
or turned off.
• Charge the built-in rechargeable battery or if the
POWER indicator is still off after charging the
built-in rechargeable battery, take the
headphones to a Sony dealer for replacement of
the rechargeable battery.
, If you connect the transmitter to the LINE OUT or
REC OUT jack of an audio reproducer, make sure
that the NOISE FILTER switch is set to OFF.
, Make sure that the NOISE FILTER switch is set to
either ON or OFF (If the switch gets stuck
between ON and OFF, the sound will be cut off).
Distortion
, If the transmitter is connected to the headphones
jack, turn down the volume of the connected
audio/video equipment.
, Change the radio frequency with the CHANNEL
selector on the transmitter.
, The headphones' POWER indicator light is weak
or turned off.
• Charge the built-in rechargeable battery or if the
POWER indicator is still off after charging the
built-in rechargeable battery, take the
headphones to a Sony dealer for replacement of
the rechargeable battery.
, If you connect the transmitter to LINE OUT or
REC OUT jack of an audio reproducer, make sure
that the NOISE FILTER switch is set to OFF.
Loud background noise
, 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.
, MDR-RF915RK:
Change the radio frequency with the CHANNEL
selector on the transmitter, then tune the
headphones with the TUNING control.
MDR-RF945RK:
Change the radio frequency with the CHANNEL
selector on the transmitter, then press the
TUNING button again.
, The headphones' POWER indicator light is weak
or turned off.
• Charge the built-in rechargeable battery or if the
POWER indicator is still off after charging the
built-in rechargeable battery, take the
headphone to a Sony dealer for replacement of
the rechargeable battery.
, If you connect the transmitter to the LINE OUT or
REC OUT jack of an audio reproducer, make sure
that the NOISE FILTER switch is set to OFF.
Specifications
General
Carrier frequency
913.5 – 914.5 MHz
Channel Ch1, Ch2, Ch3
Modulation FM stereo
Frequency response
20 – 20,000 Hz
Transmitter TMR-RF945R, TMR-RF915R
Power source DC 9 V: supplied AC power adaptor
Audio input phono jacks/stereo mini jack
Dimensions Approx. 150 mm dia. 108 mm
(6 4 1 / in.) (w/h)
3
Mass Approx. 190 g (6.7 oz.)
Headphones MDR-RF945R, MDR-RF915R
Power source DC 2.4 V: Built-in rechargeable
battery
Mass Approx. 240 g (8.5 oz.) incl.
built-in rechargeable battery
Built-in Ni-Cd rechargeable battery
Model name NC-AA
Voltage 1.2 V
Capacity 700 mAh
Optional accessory
Plug adaptor PC-236HG (stereo mini jack y
monaural mini plug)
Design and specifications are subject to change without
notice.