User manual SONY MDR-IF140K

[. . . ] The power source of the headphones can be selected from either a supplied rechargeable battery or a commercially available R6 (size AA) dry battery. Check that you have the following items: · 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. [. . . ] 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. Insert the supplied rechargeable battery NC-AA (HJ), making sure to match battery polarity with the ] and } marks on the charger case. 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. 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. 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 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. 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. / Turn on the transmitter and the headphones first, then put on the headphones. (Around level 5 or 6 on the volume control should be appropriate. Check if there is any object between the transmitter and the headphones. [. . . ] This is inherent to infrared ray communication and does not mean that there is a problem with the unit itself. / 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. The headphones are used by a window where the sunlight is too strong. [. . . ]