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Sony MDR-RF940RK Operating Instructions

Sony wireless stereo headphone system operating instructions.
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3-858-839-12(1)
2
2
3
( Getting started
Connect the transmitter to a power
Insert two R6 (size AA) batteries by
Put on the headphones and the
Replacing the ear
Troubleshooting
source.
matching the + and – on the batteries
power turns on automatically.
to the + and – in the battery
Unpacking
pads
To obtain power from an AC outlet
compartment.
Problem
Solution
Transmitter
Check that you have the following
When the ear pads become dirty or
to an AC
No sound/
Turn on the transmitter
outlet
items:
damaged, you can get replacements
Muffled sound
first, then put on the
from your Sony dealer. Replace them as
headphones.
• The transmitter
illustrated below.
Check the connection of the
to DC IN
]
]
audio/video equipment or
Wireless Stereo
4.5V jack
1
AC power
Remove the old ear pad by pulling it
the AC power adaptor.
adaptor
4
out of the groove on the housing.
}
Adjust the volume.
(supplied)
Check that the audio/video
Headphone System
equipment is turned on.
Notes
Turn up the volume on the
• AC power adaptor
3
•When the AC power adaptor is connected to the
Close the battery compartment lid.
connected audio/video
transmitter, internal batteries are automatically
equipment, if the
disconnected.
Operating Instructions
transmitter is connected to
•Use only the supplied AC power adaptor. Do
the headphones jack.
not use any other AC power adaptor.
Manual de instrucciones
The mute function is
• Connecting cord (phono plugs ˜
activated.
Note
stereo mini jack)
2
Use the headphones near
Place the new ear pad on the
If the transmitter is connected to the headphones
the transmitter.
Polarity of the plug
housing and insert the edge of the
jack of the source equipment, set the volume of
that equipment as high as possible without
pad into the groove as illustrated.
Replace both batteries of the
•When you connect the connecting cord directly
distorting the audio signal.
headphones.
to an earphone jack, the audio signal will not be
• The headphones
output through the right channel. In such a case,
Replace the batteries in the
Auto power on/off function
use the separately sold PC-236HG plug adaptor.
transmitter if the
When you remove the headphones, the
transmitter is used by
To obtain power from batteries
Battery life
power turns off automatically. Do not
battery operation.
The transmitter can also be operated by
apply pressure to the left ear pad when
Battery
Approx. hours
Distortion
If the transmitter is
use of four R6 (size AA) batteries.
not using the headphones, otherwise the
connected to the headphones
headphones will be switched on.
Sony alkaline battery
40
1
jack, turn down the volume
Open the battery compartment lid
LR6 (SG)
of the connected audio/
on the bottom of the transmitter.
Sony battery R6P (SR)
20
video equipment.
Make sure that the entire edge of the ear
pad is securely inserted into the groove.
Replace both batteries of the
Setting up the
When to replace the batteries
/
headphones.
Replace both batteries with new ones
transmitter
Replace the batteries in the
when the POWER indicator dims, and a
( Additional information
transmitter if the
hissing noise increases.
transmitter is used by
1
2
Mute function
Insert four R6 (size AA) batteries by
Connect the transmitter to audio/
battery operation.
Precautions
If a hissing noise is heard when the
video equipment.
matching the + and – on the batteries
Notes on batteries
headphones are used outside of the
Move closer to the
to the + and – in the battery
Loud
To avoid damage to the system caused
a To connect to a headphones jack
transmitter. As you move
compartment.
effective range (see the next section), the
background
by battery leakage and corrosion;
MDR-RF940RK
• When the headphones are not to be
away from the transmitter,
noise
mute function will be activated and the
– Install the batteries with the correct
used for a long period of time, remove
more noise is likely to be
sound will not be heard from the
polarity.
heard.
the batteries to avoid damage caused
Sony Corporation © 1996
headphones. To restore the sound,
Printed in Japan
– Do not try to recharge the batteries.
Transmitter
by battery leakage and subsequent
If the transmitter is
move near toward the transmitter.
– Remove the batteries if the system is
corrosion.
connected to the
not to be used for a long period of
• When the transmitter is not to be used
headphones jack, turn up
After listening to a program
time.
the volume of the connected
for a long period of time, disconnect
English
Take the headphones off before turning
In case of battery leakage, wipe off any
audio/video equipment.
the AC power adaptor from the AC
off the transmitter. If you turn off the
3
deposit in the battery compartments
thoroughly and retain it for future
Close the battery compartment.
outlet holding the plug. Do not pull
If noise is heard when the
transmitter first, you may hear some
before installing new batteries.
WARNING
reference.
to headphones jack
on the cord.
transmitter is hooked to the
noise.
Some features are:
(stereo mini jack)
TV headphones jack, try
Also remove the batteries to avoid
• Wireless system that allows you to
To prevent fire or shock hazard,
connecting from LINE OUT.
damage caused by battery leakage and
listen to a program free from the
( Operating the system
do not expose the unit to rain or
subsequent corrosion.
Replace both batteries of the
restriction of a cord within 130 feet
moisture.
• Do not leave the wireless stereo
headphones.
The effective areas
from the transmitter.
headphone system in a location subject
Listening to a
To avoid electrical shock, do not
Replace the batteries in the
Battery life
• High fidelity sound reproduction
of the transmitter
to direct sunlight, heat or moisture.
open the cabinet. Refer servicing
transmitter if the
• Compact transmitter which operates
program
Battery
Approx. hours
transmitter is used by
to qualified personnel only.
Discman,
on battery power and AC power
Notes on headphones
battery operation.
Walkman, TV,
Sony alkaline battery
40
The optimum distance is up to
supplied through the supplied AC
WARNING
1
Preventing hearing damage
VCR, etc.
LR6 (SG)
Select the radio frequency with the
approximately 130 feet (40m) without
You are cautioned that any changes or
power adaptor
Avoid using headphones at high
CHANNEL selector switch.
Sony battery R6P (SR)
20
the system picking up some interference.
modifications not expressly approved in
• Comfortable Circum-aural
volume. Hearing experts advise against
Select the same channel on the
However, the distance may vary
headphones
b To connect to LINE OUT or REC OUT
this manual could void your authority to
continuous, loud and extended play. If
headphones and the transmitter.
according to the surroundings and
Specifications
• Automatic ON/OFF function on
operate this equipment.
jacks
you experience a ringing in your ears,
When to replace the batteries
environment. If the system picks up
headphones to preserve battery power
reduce the volume or discontinue use.
Replace all the batteries with new ones
some noise while using it within the
• Mute function to avoid noise when no
Owner's Record
General
when the POWER indicator dims, and a
above mentioned distance, reduce the
audio signal is available.
Caring for others
hissing noise increases.
Transmitter
Carrier frequency
The model number is located inside the
distance between the transmitter unit
Keep the volume at a moderate level.
913.5 – 914.5 MHz
battery compartment of the transmitter
and the headphones, or select the other
This will allow you to hear outside
Channel
Ch1, Ch2
and the right inner side of the head
channel.
sounds and to be considerate to the
Modulation
FM stereo
band.
Notes on receiving
people around you.
Setting up the
Frequency response
The serial number is located inside the
Notes
18 – 22,000 Hz
battery compartment of the transmitter
performance
•When you use the headphones inside the
headphones
If you have any questions or problems
Transmitter
effective areas of the transmitter, the transmitter
and inside of the battery compartment of
concerning the system that are not
can be placed in any direction from the listener.
RF Power
Less than 94 dBµV/m at 3 m
the headphones.
The system for this equipment utilizes very
•Even within the signal reception area, there are
1
covered in this manual, please consult
Power source
DC 4.5 V: supplied AC power
high frequency signals in the 900 MHz band
Open the battery compartment lid
Record these numbers in the spaces
CH1
CH2
some spots (dead point) where the RF signal can
the nearest Sony dealer.
adaptor
so the receiving performance may deteriorate
on the left inner side of the head
provided below. Refer to them
not be received. This characteristics is inherent to
DC 6 V: 4 x R6 (size AA) battery
due to the surroundings. The following
band.
RF signals, and does not indicate malfunction.
whenever you call upon your Sony
Audio input
stereo mini plug
Be sure to bring the headphones and the
examples illustrate conditions that may
By slightly moving the transmitter, location of
dealer regarding this product.
the dead point can be changed.
Dimensions
Approx. 90 mm dia x 35 mm
reduce the possible receiving range or cause
transmitter to the Sony dealer when
Connecting
(3
5
/
x 1
7
/
in.) (w/h)
interference with reception.
8
16
Model No. MDR-RF940RK
2
requiring repair work.
Turn on the audio/video equipment
cord (supplied)
• Inside a building with walls containing
Mass
Approx. 200 g (7.1 oz.)
Transmitter TMR-RF940R
then the transmitter.
steel beams.
incl.batteries
Headphones MDR-RF940R
• Area with many steel file cabinets, etc.
Left channel
Right
Serial No.
channel (red)
• Area with many electrical appliances
(white)
Headphones
Transmitter
capable of generating electromagnetic
Power source
DC 3 V: 2 x R6 (size AA) battery
Headphones
noise.
to LINE OUT or
Mass
Approx. 270 g (9.5 oz.) incl.
• Transmitter is placed on a metal
REC OUT
batteries
POWER
instrument.
• Area facing roadways.
Optional accessories
• Noise or interfering signals exist in the
Welcome!
Plug adaptor PC-236HG
surroundings due to radio transceivers in
(stereo mini jack ˜ monaural mini plug)
trucks, etc.
Stereo system,
Thank you for purchasing the Sony
• Noise or interfering signals exist in the
TV, VCR, etc.
Design and specifications are subject to change
MDR-RF940RK Wireless Stereo
surroundings due to wireless
without notice.
communication systems installed along
Headphone System. Before operating
roadways.
the unit, please read this manual

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    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 out of the groove on the housing.

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