User manual SONY MDR-IF420RK

[. . . ] The model number is located at the bottom of the transmitter and the right inner side of the headband. The serial number is located at the bottom of the transmitter and in the battery compartment of the headphones. record these numbers in the spaces provided below. Refer to them whenever you call upon your Sony dealer regarding this product. [. . . ] Right channel's volume is higher Left channel's volume is higher When you remove the headphones, the power turns off automatically. Do not allow the suspender to be pulled up, otherwise the headphones will be switched on. Put on the headphones and the power turns on automatically. The power indicator glows red when the power turns on. If a hissing noise is heard when the infrared rays are obstructed, or the headphones are used outside of the effective range (see page 3), 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. When no audio signal is received for more than approximately five minutes Enjoying the TV or VCR with the simulated surround effect (MDR-IF520RK only) When using an audio equipment with a stereo speakers Take the headphones off and rest them away onto the transmitter. The transmitter power will automatically be turned off. If the supplied rechargeable battery is used for the headphones, the charging indicator on the transmitter lights up. The rechargeable headphone battery is continuously charged when the headphones are placed on the transmitter. Since little electric current is used for charging, there is no need to worry about overcharging. As MDR-IF420RK/MDR-IF520RK Cordless Stereo Headphone System is not affected by the memory effect of the Ni-Cd battery, it is advisable that the headphones are rested on the transmitter whenever not in use so that the headphones' battery is always charged. When a R6 (size AA) dry battery is used for the headphones, the battery charge function is not activated. 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. With this headphone system, you can enjoy surround sound by listening to the sound from the speakers of a connected stereo TV or audio equipment and to the rear sound from the headphones created by the built-in surround circuit. To listen to the sound with this effect, set up the equipment as follows. When all the audio output jacks of the epuipment that you are connecting to are used, set up as follows. If you do so, front speaker sound will be lost, and the surround effect can not be obtained. Notes The surround effect does not work in the following cases: --The source sound is monaural. When you use the surround effect, do not connect the transmitter to the surround terminals of the audio/video equipment. If you do so, the surround effect may not be obtained or sound may not be output. [. . . ] The headphones' power indicator light is weak or turned off. Charge the rechargeable battery because the headphones' battery is weak, or if the power indicator is still off after charging the battery, take the headphones to a Sony dealer for a replacement of the rechargeable battery. If you are using the conventional dry battery, replace it with a new one. Disconnect the connecting cord with the power of the transmitter on and check if the noise is heard from the headphones. [. . . ]