Sony MDR-IF245RK Operating Instructions Manual

Also see for MDR-IF245RK: Operating instructions Operating instructions Specifications

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headphone system

Cordless StereoHeadphone SystemOperating Instructions©2013 Sony Corporation Printed in China4-429-158-31(1)MDR-IF245RKWARNINGTo reduce the risk of fire or electric shock, do not expose thisapparatus to rain or moisture.To reduce the risk of fire or electric shock, do not expose thisapparatus to dripping or splashing, and do not place objectsfilled with liquids, such as vases, on the apparatus.Do not expose the batteries (battery pack or batteries installed)to excessive heat such as sunshine, fire or the like for a long time.To avoid electrical shock, do not open the cabinet. Referservicing to qualified personnel only.Do not install the appliance in a confined space, such as abookcase or built-in cabinet.As the main plug of AC power adaptor is used to disconnect theAC power adaptor from the mains, connect it to an easilyaccessible AC outlet. Should you notice an abnormality in it,disconnect it from the AC outlet immediately.Excessive sound pressure from earphones and headphones cancause hearing loss.AC adaptor is not disconnected from the mains as long as it isconnected to the AC outlet, even if the unit itself has beenturned off.The nameplate is located on the bottom exterior.You are cautioned that any changes or modifications notexpressly approved in this manual could void your authority tooperate this equipment.NoteThis equipment has been tested and found to comply with thelimits for a Class B digital device, pursuant to Part 15 of the FCCRules. These limits are designed to provide reasonableprotection against harmful interference in a residentialinstallation. This equipment generates, uses and can radiateradio frequency energy and, if not installed and used inaccordance with the instructions, may cause harmfulinterference to radio communications.However, there is no guarantee that interference will not occurin a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can bedetermined by turning the equipment off and on, the user isencouraged to try to correct the interference by one or more ofthe following measures:Reorient or relocate the receiving antenna.Increase the separation between the equipment and receiver.Connect the equipment into an outlet on a circuit differentfrom that to which the receiver is connected.Consult the dealer or an experienced radio/ TV technician forhelp.––––How to use Effective area of thetransmitterThe illustration below shows the approximate area covered bythe infrared rays emitted from the transmitter when you wearthe headphones and face the transmitter.TransmitterTop view Approx. 3 m (10 ft)Approx. 8 m(26 ft)90°90°Side view Approx. 3 m (10 ft)Approx. 8 m(26 ft)TransmitterIf you use the headphones at too great a distance from thetransmitter, you may hear a hissing noise, and if there is anobject between the headphones and the transmitter, soundmay be interrupted. These phenomena are inherent in infraredray communication and not a malfunction.Do not cover the infrared sensors with your hands or hair.When you use the headphones inside the area in theillustration above, the transmitter can be placed in front,behind or by the side of you. However, depending oncircumstances, the area covered by the infrared rays may besmaller than illustrated.The noise you may hear through the headphones may varydepending on the transmitter position and room conditions. Itis recommended that you place the transmitter in a locationthat produces the clearest sound.Do not use this system in areas exposed to direct sunlight orother strong light. The sound may be interrupted.Plasma displays may interfere with normal operation of thissystem.The brightness of the infrared emitters may not be uniform;however, this is not a malfunction.About muting functionIf the infrared rays are obstructed, or the headphones are usedoutside their effective range, noise will increase and sound willbecome hard to hear. In such a case, this function mutes anysound from the headphones to avoid potential ear damage as aresult of noise. Sound is automatically restored when you movenearer the transmitter or remove the obstruction.Tips for chargingCharge supplied battery firstThe supplied rechargeable nickel-metal hydride battery is notcharged from the first time you use it. Be sure to charge thembefore use.About auto charge functionPlacing the headphones on the transmitter automatically turnsthem off, then charging starts. This eliminates the need forturning on/off every time you wear and take off the headphones.If CHG indicator is not litCheck if the right and left headphones are rested on thetransmitter correctly. Take off the headphones and place themon the transmitter again so that the headphones’ contact pointsmeet the transmitter’s contact pins.Charging and usage timeDepending on the remaining battery status, it takes approx. 30minutes to 7 hours to recharge.Approx. charging time Approx. usage time1)7 hours2) 28 hours3)1) at 1 kHz, 0.1 mW + 0.1 mW output2) hours required to fully charge an empty battery3) Time may vary, depending on the temperature or conditionsof use.To recharge supplied battery after usePlace the headphones on the transmitter after use. The CHGindicator lights up, then charging starts.When charging is complete, there is no need to remove theheadphones from the transmitter.Remaining batteryTo check the remaining battery charge of the headphones, turnon the headphones, and check the POWER indicator. The batteryis still serviceable when the indicator lights up red.Charge the headphones if the POWER indicator turns off, dims,flashes, or the sound becomes distorted or noisy.NotesInsert the AC adaptor plug firmly.Be sure to use the supplied AC adaptor. Using AC adaptorswith different plug polarity or other characteristics can causeproduct failure.Unifiedpolarity plugThe battery capacity may decrease if the headphones areturned on and placed on the transmitter with the AC adaptordisconnected.The transmitter automatically turns off while charging thebattery.This system is designed to charge only the suppliedrechargeable battery BP-HP550-11 for safety. Note that othertypes of rechargeable battery cannot be charged with thissystem.If dry batteries are installed, they cannot be charged.Do not attempt to use the supplied rechargeable battery BP-HP550-11 for other components. It is for use with this systemonly.Charge in an environmental temperature of between 5 °C and35 °C (between 41 °F and 95 °F).When the battery life reduces to half, this may be the end ofbattery lifetime. The supplied rechargeable battery BP-HP550-11 is not commercially available. You can order the batteryfrom the store where you purchased this system, or at yournearest Sony dealer.––––––––––––––––Using the headphoneswith separately-sold drybatteriesCommercially available (LR03 (size AAA)) dry batteries can alsobe used to power the headphones. Install two batteries in thesame manner as described in step 1 of “How to use.”When dry batteries are installed, the battery charge function isnot activated.Battery lifeBattery Approx. usage time1)Sony alkaline battery LR03(size AAA) 50 hours2)1) at 1 kHz, 0.1 mW + 0.1 mW output2) Time may vary, depending on the temperature or conditionsof use.NoteDo not carry a dry battery together with coins or other metallicobjects. It can generate heat if the positive and negativeterminals of the battery are accidentally come into contact withmetallic objects.Tips for connectionDo not connect to the AUDIO IN 1 and AUDIO IN 2 jacks at thesame time. If you connect two A/V components to both jacksat the same time, both of the audio signals may result in mixedoutput.When you connect the connecting cable directly to anearphone jack (monaural mini jack), the audio signal may notbe output through the right channel.Tips for volume settingIf you connect the transmitter to the headphone jack of the A/V component, set the volume of the A/V component as high aspossible but not so high that the audio signal becomesdistorted.When watching videos, be careful not to raise the volume toohigh in quiet scenes. You may hurt your ears when a loudscene is played.Replacing the earpadsThe earpads are replaceable. If the earpads become dirty orworn out, replace them as illustrated below. The earpads are notcommercially available. You can order replacements from thestore where you purchased this system, or at your nearest Sonydealer.1 Remove the old earpadby pulling it off.2 Place the new earpadaround the housing.TroubleshootingIf you run into any problems using this system, use the followingchecklist. Should any problem persist, consult your nearest Sonydealer.No sound/Low soundTurn on the headphones.Check the connection of the A/V component or the ACadaptor.Check that the A/V component is turned on.If you connect the transmitter to an A/V component using theheadphone jack, raise the volume level on the connected A/Vcomponent within the range where the sound is not distorted.Check that the infrared sensors of the headphones are notcovered with your hands or hair.Check that there is no object between the transmitter and theheadphones.Use the headphones near the transmitter, or change theposition of the transmitter.Charge the supplied rechargeable battery, or replace drybatteries with new ones. If the POWER indicator is still off aftercharging, take the headphones to a Sony dealer.Raise the headphone volume.Distorted or intermittent sound(sometimes with noise)Use the headphones near the transmitter, or change theposition of the transmitter.If you connect the transmitter to an A/V component using theheadphone jack, lower the volume level on the connected A/Vcomponent within the range where the sound is not distorted.Charge the supplied rechargeable battery, or replace drybatteries with new ones. If the POWER indicator is still off aftercharging, take the headphones to a Sony dealer.Loud background noiseUse the headphones near the transmitter, or change theposition of the transmitter. (As you move away from thetransmitter, more noise is likely to be heard. This is inherent ininfrared ray communication and not a malfunction.)Check that there is no object between the transmitter and theheadphones.Check that the infrared sensors on the headphones are notcovered with your hands or hair.If you use the headphones by a window where the sunlight istoo strong, draw the curtains/blinds to shut out the directsunlight, or use the headphones away from the sunlight.If you connect the transmitter to an A/V component using theheadphone jack, raise the volume level on the connected A/Vcomponent within the range where the sound is not distorted.Charge the supplied rechargeable battery, or replace drybatteries with new ones. If the POWER indicator is still off aftercharging, take the headphones to a Sony dealer.If you have another transmitter, check if more than onetransmitters are used at the same time. Turn off othertransmitter or move to a place outside the range of thistransmitter.The sound cuts offThe transmitter turns off if no signal or low signal is input for10 minutes. If you connect the transmitter to an A/Vcomponent using the headphone jack, raise the volume levelon the connected A/V component within the range where thesound is not distorted.––––––––––––––––––––––––Battery cannot be charged/CHGindicator flashes, or does not light upCheck that the right/left of the headphones and transmittercorrespond, and put the headphones on the transmittercorrectly.Install the supplied rechargeable nickel-metal hydride battery.Dry batteries and rechargeable batteries other than thesupplied cannot be charged.If the CHG indicator does not light up even though you put theheadphones on the transmitter and wait for a while, it may bethe end of battery lifetime. You can order the suppliedrechargeable battery BP-HP550-11 from the store where youpurchased this system, or at your nearest Sony dealer.PrecautionsWhen this system is not to be used for a long period of time,disconnect the AC adaptor from the AC outlet holding theplug, and remove the battery from the headphones to avoiddamage caused by battery leakage and subsequent corrosion.Do not leave this system in a location subject to directsunlight, heat or moisture.This system is guaranteed for use in the temperature range of5 °C to 35 °C (41 °F to 95 °F).You may hear some noise when you disconnect the ACadaptor from the transmitter before taking off theheadphones.Avoid exposure to temperature extremes, direct sunlight,moisture, sand, dust or mechanical shock.Notes on headphonesTo reduce the risk of hearing damageAvoid using headphones at high volume. Hearing experts adviseagainst continuous, loud and extended play. If you experience aringing in your ears, lower the volume or discontinue use.Caring for othersKeep the volume at a moderate level. This will allow you to hearoutside sounds and to be considerate to the people around you.If you have any questions or problems concerning the systemthat are not covered in this manual, please consult your nearestSony dealer.Be sure to bring the headphones and the transmitter to the Sonydealer when requiring repair work.SpecificationsTransmitter (TMR-IF245R)Modulation FM stereoCarrier frequency Right 2.8 MHzLeft 2.3 MHzFrequency response10 Hz – 20,000 HzAudio inputs Pin jacks (left/right)Stereo mini jackPower requirementsDC 12 V (from the supplied AC adaptor)Dimensions Approx. 140 mm × 60 mm × 105 mm (w/h/d)Mass Approx. 200 gHeadphones (MDR-IF245R)Frequency response10 Hz – 24,000 HzPower source Supplied rechargeable nickel-metal hydridebattery BP-HP550-11, or commerciallyavailable (LR03 (size AAA)) dry batteriesMass Approx. 200 g including batteryIncluded itemsTransmitter TMR-IF245RHeadphones MDR-IF245RAC adaptor (12 V) (1)Connecting cable (stereo mini plug  pin plug × 2), 1 m (1)Rechargeable nickel-metal hydride battery BP-HP550-11(550 mAh min) (1)Operating Instructions (this manual) (1)Design and specifications are subject to change without notice.––––––––Transmitter TMR-IF245R (1)AC adaptor (1)Rechargeable nickel-metalhydride battery(BP-HP550-11) (1)Headphones MDR-IF245R (1)Connecting cable (stereo miniplug  pin plug × 2), 1 m (1)Checking the includeditemsFeaturesThank you for purchasing the Sony MDR-IF245RK Cordless StereoHeadphone System. Before operating the unit, please read thismanual thoroughly and retain it for future reference.Some features are:Lightweight headphones for long time listening comfort.Approx. 28 hours playback with supplied Ni-MH rechargeablebattery. AAA alkaline batteries (not supplied) can also be usedas alternative power.Battery is automatically charged by placing the headphoneson the transmitter.40 mm driver units for powerful, expressive sound.Muting function reduces noise disturbance.Self-adjusting headband mechanism eliminating the need forheadband adjustment.Up to 8 meters (26 feet) reception range.–––––––Connect the AC adaptor. Charge the headphones.To ACoutlet(Red) (Off )Complete whenindicator turns off.Connect the A/V component, following hookup  or  below.Raise the volume level on the connected A/V component within the range where the sound is not distorted. Using the headphone jack of the A/V componentL (white)R (red) Stereo miniplugHeadphone jack(Stereo mini jack)TV, Digital music player, etc.L (white)R (red)Stereo mini plugAudio out(L/R) jacksStereo system, Blu-ray Disc player, DVD player, TV*, etc.* In case of no headphone jack.About the infrared sensorsThe infrared sensors of the headphones are located as illustrated below.Use the transmitter in a position facing the headphones.If the infrared sensors of one housing are covered by your hands (when adjusting thevolume, etc.), the muting function may be activated to reduce noise caused byobstruction of the infrared rays. To restore sound, move nearer the transmitter, ororient the sensor of the uncovered housing toward the transmitter.––After useTake off the headphones, then turn off the power.If no signal or low signal isinput for about 10 minutesWhen no signal is input for about 10 minutes, thetransmitter turns off automatically*. The infraredemitters of the transmitter also turn off. Thetransmitter restarts after receiving an audio signalagain.The transmitter may also turn off if low signal isinput for about 10 minutes. In this case, raise thevolume of the connected A/V component withinthe range where the sound is not distorted, thenlower the volume of the headphones.* If signal noise is output from the connected A/Vcomponent, the transmitter may not turn off,even when no audio signal is input.Start playback of the A/V component.Raise the volume level on the connected A/V component within the range where the sound is notdistorted.Wear the headphones.Before listeningTo reduce the risk of hearing damage, first lower the volume. Using the audio out (L/R) jacks of the A/V componentInsert the supplied rechargeable battery BP-HP550-11 into the left housing of the headphones.Observe the correct polarity when installing battery.ContactpinsLower volumeUpTactile dotDownRechargeable nickel-metal hydridebattery BP-HP550-11 (supplied)ContactpointsTactile dotInsert the end first.If you want to receive audio on the headphones while at the same time hearing audio from the television speakers:connect the transmitter to your Cable Box/Satellite Box rather than your television.425 613

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