Sony MDR-IF125RK User's Manual
Contents
1. gt The POWER indicator on the headphones dims e Recharge the supplied battery If there is no sign of improvement please consult your nearest Sony dealer e Replace the battery of the headphones 4 Distortion gt If the transmitter is connected to the headphones jack turn down the volume of the connected audio video equipment Around level 5 or 6 on the volume control should be appropriate gt Recharge the supplied battery gt Replace the battery of the headphones Loud background noise gt Move closer to the transmitter As you move away from the transmitter more noise is likely to be heard This is inherent to infrared ray communication and does not mean that there is a problem with the unit itself gt Check that there is no object between the transmitter and the headphones Check that the infrared sensors are not covered with your hands or hair gt Change the position or angle of the transmitter e The headphones are used by a window where the sunlight is too strong Draw the curtains blind to shut out the direct sunlight or use the headphones away form the sunlight gt Ifthe transmitter is connected to the headphones jack turn up the volume of the connected audio video equipment Around level 5 or 6 on the volume control should be appropriate Recharge the supplied battery Replace the battery of the headphones 4 gt gt Specifications General Modulation system Frequency2. modulation Carrier frequency Right 2 8 MHz Left 2 3 MHz Frequency response 18 22 000 Hz Transmitter TMR IF125R Power source DC IN 9V jack accepts power supplied from the AC power adaptor for use on the following voltages Where purchased Operating voltage U S A Canada 120 V AC 60 Hz U K 230 240 V AC 50 Hz European countries 220 230V AC 50 Hz 220 230 V AC 50 60 Hz or 120 V AC 60 Hz Other countries 110 120 V 220 240 V AC 50 60 Hz Japan Except for Japanese domestic model Audio input Phono jacks stereo mini jack Dimensions Approx 152 x 40 x 72 mm 6x 1 2x2 sin w h d Mass Approx 88 g 3 1 oz Headphones MDR IF120 DC 1 5 V 1 x R6 size AA battery Mass Approx 130 g 4 6 oz including battery Power source Optional accessories Plug adaptor PC 236HG stereo mini jack lt gt monaural mini plug PC 234HG stereo mini jack gt stereo phone plug Connecting cords RK C510HG RK C515HG RK C520HG phono plug x 2 gt phono plug x 2 RK G136HG stereo mini plug gt stereo mini plug RK G129HG stereo mini plug gt phono plug x 2 Design and specifications are subject to change without notice
3. 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 Charging the rechargeable battery The headphones are powered by a rechargeable battery supplied or a dry cell battery not supplied Charge the rechargeable battery before use Check that the transmitter power is off ON D OFF CHG G POWER 2 Open the battery charger lid on the transmitter 3 Insert 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 4 Close 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 35 hours of operation One hour charging of the rechargeable battery enables about 1 hours and 30 minutes of operation Notes e 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 e Since little electric current is used for charging there is no need to worry about overcharging e 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 e When the transmitt
4. SONY 3 858 456 12 1 Cordless Stereo Headphone System Operating Instructions MDR IF125RK Sony Corporation 1996 Printed in Korea 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 Owner s Record 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 Record these numbers in the spaces provided below Refer to them whenever you call upon your Sony dealer regarding this product Model No MDR IF125RK Transmitter TMR IF125R Headphones MDR IF120 Serial No Transmitter Headphones 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 e Cordless system that allows you to listen to a program free from the restriction of a cord e Broad horizontal listening area that gives you superb sound virtually anywhere in the room Self adjusting headband for fitting your head perfectly e The VOL control adjusts the volume l
5. er 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 Setting up the headphones 1 Open the battery compartment lid on the left inner side of the headband 2 Insert the supplied rechargeable battery NC AA HJ by matching the and on the battery to the and in the battery compartment Make sure that the battery is charged 3 Close the battery compartment lid Using a dry cell battery Insert the dry cell battery into the headphone battery compartment the same as when inserting the rechargeable battery Battery life Battery Approx hours Sony alkaline battery 100 LR6 AM3 N Sony battery 50 R6P SUM 3 NS 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 Listening to a program 1 Turn on the audio video equipment connected to the transmitter 2 Turn on the transmitter The infrared emitters light up 3 Turn on the power of the headphones The power indicator lights in red Oo ON OFF Jo 4 Put on the headphones 5 Adjust the volume AS Mute function If a hissing noise is
6. evel of both channels The supplied rechargeable battery can be used to power the headphones About the infrared rays communication The illustration below shows the approximate area covered by the infrared rays emitted from the transmitter Transmitter Infrared ray Approx 3m Z 118 yan karat iy Notes e 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 e The infrared rays will not penetrate walls or opaque glass therefore be sure to stay within sight of the transmitter e 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 e The sound you hear varies according to your position and the transmitter position Try finding a position which yields the best sound Approx 3 m 118 in Unpacking Check that you have the following items TMR IF125R e Transmitter e Connecting cord phono plugs gt stereo mini plug e Ni Cd Rechargeable battery NC AA HJ e Headphones MDR IF120 Setting up the transmitter 1 Connect the transmitter to audio video equipment Select one of the hookups be
7. 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 headphones and 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 Precautions e Before operating the system check that the operating voltage of your system is identical with the voltage of your local power supply e The CE mark on the unit is valid only for products marketed in the European Union e 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 e 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 e Do not leave the cordless stereo headphones 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 aga
8. inst 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 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 Place the new ear pad on the housing as illustrated Make sure that the ear pad is securely replaced Troubleshooting No sound Muffled sound gt Turn on the transmitter and the headphones first then put on the headphones gt Check the connection of the audio video equipment or the AC power adaptor Check that the audio video equipment is turned on gt Turn up the volume on the connected audio video equipment if the transmitter is connected to the headphones jack Around level 5 or 6 on the volume control should be appropriate The mute function is activated e Check if there is any object between the transmitter and the headphones e Use the headphones near the transmitter e Change the position and angle of the transmitter
9. low depending on the jack type To connect to LINE OUT or REC OUT jacks Transmitter to AUDIO IN B jack Connecting cord supplied Left Right channel channel white red to LINE OUT or REC OUT _ Stereo system TV VCR etc 6 To connect to a headphones jack Transmitter to AUDIO IN A jacks Right channel Left channel red white Connecting cord supplied Unimatch plug adaptor not supplied Op to a headphones jack stereo mini jack D to a headphones Discman jack stereo WALKMAN TV phone jack VCR etc 2 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 AC power adaptor supplied 220V 240V 110V 120V E vg JAGE S CTOR 3 Connect the transmitter to a power source Transmitter gt to an AC outlet to DC IN 9V jack AC power adaptor supplied Notes e 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 e Use only the supplied AC power adaptor Do not use any other AC power adaptor Polarity of the plu go y plug e If the plug of the AC power adaptor does not fit in the AC outlet use the supplied AC plug adaptor e When you connect the connecting cord directly to an earphone jack the audio signal will not be
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