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Sony MDR-RF940R Operating Instructions
Sony MDR-RF940R Operating Instructions

Sony MDR-RF940R Operating Instructions

Wireless stereo headphone
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Wireless Stereo
Headphones
Operating Instructions
Mode d'emploi
MDR-RF940R
Sony Corporation © 1997
Printed in Japan
English
Welcome!
Note
Thank you for purchasing the Sony
MDR-RF940R Wireless Stereo
This device complies with RSS-210 of
Headphones. Before operating the unit,
Industry Canada. Operation is subject
please read this manual thoroughly and
to the following two conditions: (1) this
retain it for future reference.
device may not cause interference, and
Some features are:
(2) this device must accept any
• Wireless system that allows you to
interference, including interference that
listen to a program free from the
may cause undesired operation of the
restriction of a cord within 130 feet
device.
from the transmitter.
• High fidelity sound reproduction
• Comfortable Circum-aural
headphones
• Automatic ON/OFF function on
headphones to preserve battery power
• Mute function to avoid noise when no
audio signal is available.
3-858-950-31(1)
( Getting started
( Operating the system
Setting up the
Listening to a
headphones
program
1
1
Open the battery compartment lid
on the left inner side of the head
band.
2
Insert two R6 (size AA) batteries by
matching the + and – on the batteries
to the + and – in the battery
compartment.
2
]
]
}
3
Close the battery compartment lid.
3
4
Battery life
Battery
Approx. hours
Sony alkaline battery
40
LR6 (SG)
Sony battery R6P (SR)
20
When to replace the batteries
Replace both batteries with new ones
Note
when the POWER indicator dims, and a
If the transmitter is connected to the
hissing noise increases.
headphones jack of the source equipment, set
the volume of that equipment as high as
Notes on batteries
possible without distorting the audio signal.
To avoid damage to the system caused
by battery leakage and corrosion;
Auto power on/off function
— Install the batteries with the correct
When you remove the headphones, the
polarity.
power turns off automatically. Do not
— Do not try to recharge the batteries.
apply pressure to the left ear pad when
— Remove the batteries if the system is
not using the headphones, otherwise the
not to be used for a long period of
headphones will be switched on.
time.
In case of battery leakage, wipe off any
deposit in the battery compartments
before installing new batteries.
Mute function
If a hissing noise is heard when the
headphones are used outside of the
effective range (see the next section), the
mute function will be activated and the
sound will not be heard from the
headphones. To restore the sound,
move near toward the transmitter.
After listening to a program
Take the headphones off before turning
off the transmitter. If you turn off the
transmitter first, you may hear some
noise.
The effective areas
of the transmitter
The optimum distance is up to
approximately 130 feet (40m) without
Select the radio frequency with the
the system picking up some interference.
CHANNEL selector switch.
However, the distance may vary
Select the same channel on the
according to the surroundings and
headphones and the transmitter.
environment. If the system picks up
some noise while using it within the
Transmitter
above mentioned distance, reduce the
distance between the transmitter unit
and the headphones, or select the other
channel.
Notes
• When you use the headphones inside the
effective areas of the transmitter, the
transmitter can be placed in any direction
CH1
CH2
from the listener.
• Even within the signal reception area, there
are some spots (dead point) where the RF
signal can not be received. This
Turn on the audio/video equipment
characteristics is inherent to RF signals, and
then the transmitter.
does not indicate malfunction. By slightly
moving the transmitter, location of the
Transmitter
dead point can be changed.
POWER
Replacing the ear
Put on the headphones and the
pads
power turns on automatically.
When the ear pads become dirty or
damaged, you can get replacements
from your Sony dealer. Replace them as
illustrated below.
1
Remove the old ear pad by pulling it
Adjust the volume.
out of the groove on the housing.
2
Place the new ear pad on the
housing and insert the edge of the
pad into the groove as illustrated.
Make sure that the entire edge of the ear
/
pad is securely inserted into the groove.
( Additional information
Troubleshooting
Precautions
Problem
Solution
No sound/
Turn on the transmitter first, then
• When the headphones are not to be
Muffled sound
put on the headphones.
used for a long period of time, remove
the batteries to avoid damage caused
Check the connection of the
audio/video equipment or the AC
by battery leakage and subsequent
power adaptor.
corrosion.
• Do not leave the wireless stereo
Check that the audio/video
equipment is turned on.
headphone in a location subject to
direct sunlight, heat or moisture.
Turn up the volume on the
connected audio/video
equipment, if the transmitter is
Notes on headphones
connected to the headphones jack.
Preventing hearing damage
Avoid using headphones at high
The mute function is activated.
Use the headphones near the
volume. Hearing experts advise against
transmitter.
continuous, loud and extended play. If
Replace both batteries of the
you experience a ringing in your ears,
headphones.
reduce the volume or discontinue use.
Replace the batteries in the
Caring for others
transmitter if the transmitter is
used by battery operation.
Keep the volume at a moderate level.
This will allow you to hear outside
Distortion
If the transmitter is
connected to the headphones jack,
sounds and to be considerate to the
turn down the volume of the
people around you.
connected audio/video
equipment.
If you have any questions or problems
Replace both batteries of the
concerning the system that are not
headphones.
covered in this manual, please consult
Replace the batteries in the
the nearest Sony dealer.
transmitter if the transmitter is
used by battery operation.
Be sure to bring the headphones and the
Loud
Move closer to the transmitter. As
transmitter to the Sony dealer when
background
you move away from the
requiring repair work.
noise
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.
Replace both batteries of the
headphones.
Replace the batteries in the
transmitter if the transmitter is
used by battery operation.
Specifications
General
Carrier frequency
913.5 – 914.5 MHz
Channel
Ch1, Ch2
Modulation
FM stereo
Frequency response
20 – 20,000 Hz
Headphones
Power source
DC 3 V: 2 x R6 (size AA)
battery
Mass
Approx. 270 g (9.5 oz.) inc.
batteries
Design and specifications are subject to
change without notice.

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Summary of Contents for Sony MDR-RF940R

  • Page 1 When the ear pads become dirty or damaged, you can get replacements from your Sony dealer. Replace them as illustrated below. Remove the old ear pad by pulling it Adjust the volume. out of the groove on the housing.
  • Page 2 Nous vous félicitons pour l’achat de ce casque casque stéréo sans fil Sony Ce dispositif satisfait aux exigences MDR-RF940R. Avant la mise en service d'Industrie Canada, prescrites dans le de cet appareil, prière de lire Ouvrez le couvercle du logement document CNR-210.