Sony Headphones MDR IF125RK User Manual

3-858-456-12(1)  
2
3
If your AC power adaptor is equipped  
with a voltage selector, before connecting  
the AC power adaptor to an AC outlet,  
set it to the operating voltage in your area  
with a screw driver.  
Unpacking  
Check that you have the following items:  
TMR-IF125R  
• Transmitter  
AC power adaptor (supplied)  
• AC power adaptor  
Connect the transmitter to a power  
source.  
Cordless Stereo  
• Connecting cord (phono plugs ˜ stereo mini  
plug)  
Transmitter  
Headphone System  
to an AC  
outlet  
• Ni-Cd Rechargeable battery NC-AA (HJ)  
Operating Instructions  
B
R
A
L
¥
AUDIO IN  
DC 9V  
to DC IN 9V jack  
• Headphones  
MDR-IF120  
AC power adaptor (supplied)  
Notes  
• Do not connect to the AUDIO IN A jacks and B 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.  
Polarity of the plug  
Setting up the  
transmitter  
• If the plug of the AC power adaptor does not fit in the  
AC outlet, use the supplied AC plug 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.  
1
Connect the transmitter to audio/video  
equipment. Select one of the hookups  
below depending on the jack type:  
* WALKMAN is a registered trademark of Sony  
Corporation.  
a To connect to LINE OUT or REC OUT  
jacks  
Transmitter  
MDR-IF125RK  
Sony Corporation © 1996 Printed in Korea  
R
A
L
¥
AUDIO IN  
DC IN 9V  
to AUDIO IN B jack  
WARNING  
About the infrared  
rays communication  
The illustration below shows the approximate area  
covered by the infrared rays emitted from the  
transmitter.  
Connecting  
cord (supplied)  
To prevent fire or shock hazard, do  
not expose the unit to rain or  
moisture.  
Left  
channel  
(white)  
Right  
channel  
(red)  
To avoid electrical shock, do not  
open the cabinet. Refer servicing  
to qualified personnel only.  
to LINE OUT  
or REC OUT  
jacks  
Transmitter  
Infrared ray  
Approx. 3 m  
(1181/8 in.)  
WARNING  
You are cautioned that any changes or  
modifications not expressly approved in this  
manual could void your authority to operate this  
equipment.  
Stereo system,  
TV, VCR, etc.  
45°  
Approx. 7 m (23 ft.)  
45°  
b To connect to a headphones jack  
Approx. 3 m  
Owner’s Record  
(1181/8 in.)  
The model number is located on the top of the  
transmitter and the inner side of the headband.  
The serial number is located at the bottom of the  
transmitter and inside the battery compartment of  
the headband.  
Transmitter  
Notes  
• This system utilizes infrared rays for communication so  
noise (hissing) can be heard in the headphones as you  
move farther away from the transmitter. The sound will  
also cutoff and noise occur if the infrared rays are  
blocked. These are characteristics of infrared ray  
communication and do not indicate an equipment  
breakdown.  
• 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.  
Record these numbers in the spaces provided  
below. Refer to them whenever you call upon your  
Sony dealer regarding this product.  
B
A
¥
AUDIO IN  
DC IN 9V  
to AUDIO IN A jacks  
Right channel  
(red)  
Left channel  
(white)  
Model No. MDR-IF125RK  
Transmitter TMR-IF125R  
Headphones MDR-IF120  
Serial No.  
Transmitter  
Headphones  
Connecting cord  
(supplied)  
Unimatch plug  
adaptor (not  
supplied)  
to a headphones  
jack (stereo  
mini jack)  
Welcome!  
Thank you for purchasing the Sony MDR-IF125RK  
Cordless Stereo Headphone System. Before  
operating the unit, please read this manual  
thoroughly and retain it for future reference.  
Some features are:  
to a headphones  
jack (stereo  
phone jack)  
Discman,  
WALKMAN*, TV,  
VCR, etc.  
• 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 VOL control adjusts the volume level of both  
channels.  
• The supplied rechargeable battery can be used to  
power the headphones.  
 

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