Sony MDR-IF230RK User manual

3
3-862-873-43(1)
© 1998 by Sony Corporation
MDR-IF230RK
Cordless Stereo
Headphone System
Operating Instructions page 2
Bedienungsanleitung seite 14
Návod k obsluze strana 26
Használati útmutató oldal 38
Instrukja obsługi strona 5
Инструкция по эксплуатации стр. 62

2
WARNING
To prevent fire or shock hazard, do
not expose the unit to rain or
moisture.
To avoid electrical shock, do not
open the cabinet. Refer servicing to
qualified personnel only.
WARNING
You are cautioned that any changes or
modifications not expressly approved in
this manual could void your authority to
operate this equipment.

3
Table of contents
Getting started
Unpacking.................................................. 4
Setting up the transmitter ........................ 4
Charging the rechargeable
battery ..................................................... 6
Setting up the headphones ...................... 7
Operating the system
Listening to a program..............................8
About the infrared rays communication 9
Replacing the ear pads ..............................9
Additional information
Precautions ...............................................10
Troubleshooting .......................................11
Specifications ............................................12
Welcome!
Thank you for purchasing the Sony
MDR-IF230RK Cordless Stereo Headphone
System. Before operating the unit, please
read this manual thoroughly and retain it
for future reference.
Some features are:
• Cordless system that allows you to listen
to a program free from the restriction of a
cord.
• Broad horizontal listening area that gives
you superb sound virtually anywhere in
the room.
• Self-adjusting headband for fitting your
head perfectly.
• The power of the headphones turns on
and off automatically every time you put
the headphones on and off (Auto power
on/off function).
• The VOL control adjusts the volume level
of both channels.
• The power source of the headphones can
be selected from either a supplied
rechargeable battery or a commercially
available R6 (size AA) dry battery.
(This mark is valid for Russia
version only.)

4
(Getting started
Unpacking
Check that you have the following items:
• Transmitter
• AC power adaptor
• Connecting cord (phono plugs ˜stereo
mini plug)
• Ni-Cd Rechargeable battery
NC-AA (HJ)
• Headphones
TMR-IF230R
MDR-IF230
Setting up the
transmitter
1Connect the transmitter to audio/video
equipment.
aWhen connecting to your audio/video
system's LINE OUT or REC OUT jacks,
connect the cord to the transmitter's
LINE IN jack only.
Note
If your audio/video equipment has a stereo mini
jack(LINE OUT), connect the stereo mini
jack(LINE OUT) to LINE IN of the transmitter by
using optional connecting cord RK-G136HG.
Connecting the LINE OUT jack of your audio/
video equipment to PHONES IN of the
transmitter will cause low or muffled sound. To
connect to PHONES IN of the transmitter with
the supplied cord, use a headphones jack on the
audio/video equipment.
Stereo system, TV, VCR, etc.
Transmitter
to LINE IN jack
Connecting cord
(supplied)
Left channel
(white) Right channel (red)
to LINE OUT or
REC OUT jacks
RLINE IN
DC IN 9V
L
¥
PHONES IN

5
bWhen connecting to your Discman's
headphones jack, connect the cord to the
transmitter's PHONES IN jack only.
2Connect the transmitter to a power
source.
Notes
•Do not connect to the PHONES IN jacks and
LINE IN jack at the same time. If you do so, the
audio signals may be mixed.
•Use only the supplied AC power adaptor. Do
not use any other AC power adaptor.
•When you connect the connecting cord directly
to an earphone jack, the audio signal will not be
output through the right channel. In such a
case, use the separately sold PC-236HG plug
adaptor.
* WALKMAN is a registered trademark of Sony
Corporation.
Polarity of the plug
Discman,
WALKMAN*,
TV, VCR, etc.
Transmitter
to PHONES
IN jacks
Right channel
(red) Left channel (white)
to a headphones
jack (stereo mini
jack)
to a headphones
jack (stereo
phone jack)
Connecting
cord
(supplied)
Unimatch
plug adaptor
(not supplied)
RLINE IN
DC IN 9V
L
¥
PHONES IN
AC power adaptor (supplied)
Transmitter
to an AC
outlet
to DC IN 9 V
jack
RLINE IN
DC IN 9V
L
¥
PHONES IN

6
Charging the
rechargeable
battery
The headphones are powered by a
rechargeable battery NC-AA (HJ)
(supplied) or a dry cell battery (not
supplied). Charge the rechargeable battery
before use.
NC-AA (HJ) is applicable only for Sony
cordless/wireless headphone systems.
Never use for any other purpose.
1Check that the transmitter power is off.
ON
OFF/CHG
POWER
2Open the battery charger lid on the
transmitter.
3Insert the supplied rechargeable battery
NC-AA (HJ), making sure to match
battery polarity with the ]and }
marks on the charger case.
The CHARGE indicator then lights up
and charging starts.
4Close the battery charger lid on the
transmitter.
Charging time and battery life
About 24 hours is required to fully charge
the rechargeable battery. Once fully
charged, the battery provides about 30
hours of operation.
One hour charging of the rechargeable
battery enables about 1 hours and 30
minutes of operation.
Notes
•This system is designed to charge only the
supplied rechargeable battery for safety. This
system cannot charge other batteries even if
they have the same shape.
•Since little electric current is used for charging,
there is no need to worry about overcharging.
•As this system is not affected by the memory
effect of the Ni-Cd battery, recharging the
supplied battery before it is completely
discharged is not a problem.
•When the transmitter power is turned on, the
battery charger does not operate.
When to recharge the battery
Recharge the supplied battery when the
POWER indicator on headphones dims,
and hissing or noise occurs.
If the POWER indicator dims even after full
charging, the battery is completely dead.
To purchase a new rechargeable battery,
consult your nearest Sony dealer.

7
Setting up the
headphones
1Open the battery compartment lid on
top of the left housing.
2Insert the supplied rechargeable battery
NC-AA (HJ) by matching the ]on the
battery to the ]terminal on the lid.
Make sure that the battery is charged.
3Close the battery compartment lid.
Removing the battery
Open the battery compartment lid, while
keeping the housing level and remove the
battery from the battery compartment as
illustrated below.
Using a dry cell battery
Insert the dry cell battery into the
headphone battery compartment in the
same way as when inserting the
rechargeable battery.
Battery life
When to replace the battery
Replace the battery with a new one when
the POWER indicator on the headphones
dims, and a hissing noise increases.
Housing (left)
Battery Battery
compartment lid
Battery
Sony alkaline battery
LR6/AM3 (N)
Sony battery
R6P/SUM-3 (NS)
Approx. hours
100
50

8
(Operating the system
Listening to a
program
1Turn on the audio/video equipment
connected to the transmitter.
2Turn on the transmitter. The infrared
emitters light up.
3Put on the headphones and the power
turns on automatically. The power
indicator glows red when the power
turns on.
4Adjust the volume.
Auto power on/off function
When you remove the headphones, the
power turns off automatically. Do not pull
up the self adjusting band when not using
the headphones, otherwise the headphones
will be switched on.
Mute function
If a hissing noise is heard when the infrared
rays are obstructed, or the headphones are
used outside of the effective range (see
“About the infrared rays communication”),
the mute function will be activated and the
sound will not be heard from the
headphones. To restore the sound, move
nearer toward the transmitter or remove
the obstruction.
After listening to a program
Take the headphones off before turning off
the transmitter. Otherwise you may hear
some noise when the infrared rays are
suddenly cut off.
Note
The infrared emitters light up when the
transmitter is turned on. The brightness of the
emitters may not be uniform, however, this is not
a malfunction.
POWER
ON
OFF/CHG

9
About the infrared
rays communication
The illustration below shows the
approximate area covered by the infrared
rays emitted from the transmitter.
Notes
•If you use the headphones at too great a
distance from the transmitter, you may hear a
hissing noise and if there is an object between
the receiver and the transmitter, the sound may
be interrupted. These phenomena are inherent
to infrared ray communication and do not
mean that there is a problem with the unit
itself.
•The infrared rays will not penetrate walls or
opaque glass, therefore, be sure to stay within
sight of the transmitter.
•When you use the headphones inside the area
illustrated in the diagram, the transmitter can
be placed in the front, behind or by the side of
the listener.
•The sound you hear varies according to your
position and the transmitter position. Try
finding a position which yields the best sound.
Replacing the Ear
Pads
When the ear pads become dirty or
damaged, consult your nearest Sony dealer
and replace them as illustrated below.
Remove the old
ear pad by
pulling it out.
45°
45°
Transmitter
Approx. 3 m
(118 1/8in.)
Approx. 3 m
(118 1/8in.)
Infrared ray
Approx. 7 m
(23 ft.)
Place the new ear
pad around the
driver unit as
illustrated.

10
(Additional information
Precautions
• Before operating the system, check that
the operating voltage of your system is
identical with the voltage of your local
power supply.
• The CE mark on the unit is valid only for
products marketed in the European
Union.
• When the headphones is not to be used
for a long period of time, remove the
battery to avoid damage caused by
battery leakage and subsequent
corrosion.
• When the transmitter is not to be used for
a long period of time, disconnect the AC
power adaptor from the AC outlet
holding the plug. Do not pull on the
cord.
• Do not leave the cordless stereo
headphone system in a location subject to
direct sunlight, heat or moisture.
Notes on headphones
Preventing 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, reduce 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 the nearest
Sony dealer.
Be sure to bring the headphones and the
transmitter to the Sony dealer when
requiring repair work.