User manual SONY MDR-RF820RK

[. . . ] Noise or interfering signals exist in the surroundings due to radio transceivers in trucks, etc. ⷠNoise or interfering signals exist in the surroundings owing to wireless communication systems installed along roadways. Check that you have the following items: · The supplied rechargeable nickel-metal hydride batteries are not charged from the first time you use them. Do not use rechargeable batteries other than the supplied ones. [. . . ] If you connect the transmitter to LINE OUT or REC OUT jacks of an audio reproducer such as an MD player or CD player, do not set the NOISE FILTER switch to ON. When the transmitter is placed on or near a TV, it may pick up a noise. To prevent your ears from being damaged, first lower the volume. Be sure to put the right housing (R) on your right ear and the left housing (L) on your left ear. Wear the headphones vertically on your head so that auto power on function is properly activated. The transmitter's power indicator will light in red. If you do not receive a clear audio signal, press it again. Sending RF signals from the transmitter The transmitter starts sending RF signals automatically when it detects an audio signal from the equipment connected. If it does not detect an audio signal for more than about four minutes, the transmitter will stop sending RF signals, and the power indicator will turn off. When the transmitter receives an audio signal again, it starts sending the RF signals, and the power indicator will light in red again. If the audio signal is very weak, the transmitter does not send RF signals. if the transmitter is connected to a headphone jack , make sure the volume of the equipment connected is set to 5 ­ 6 or higher. You may not hear the beginning of the sound from the headphones until the transmitter starts sending the RF signals after detecting an audio signal. B MDR-RF820RK Tune the headphones in to the frequency of the transmitter with the TUNE control until you can hear the audio signal loud and clear. The headphones automatically turn off when they are taken off -- Auto power on/off function Do not pull up the self-adjusting band when not in use, as this will consume the battery power. Follow steps 3 and 5 above until the receiving performance becomes better. If hiss is heard, move closer to the transmitter. ⷠYou may hear some noise when you disconnect the AC power adaptor from the transmitter before taking off the headphones. The optimum distance is up to approximately 100 m without the system picking up some interference. However, the distance may vary according to the surroundings and environment. If the system picks up some noise while using it within the above mentioned distance, reduce the distance between the transmitter unit and the headphones, or select another channel. notes · When you use the headphones inside the effective areas of the transmitter, the transmitter can be placed in any direction from the listener. [. . . ] If you connect the transmitter to LINE OUT or REC OUT jacks of an audio reproducer, make sure that the NOISE FILTER switch is set to OFF. Loud background noise As you move away from the transmitter, more noise is likely to be heard. if the transmitter is connected to the headphones jack , turn up the volume of the connected audio/video equipment. MDR-RF820RK: Change the radio frequency with the CHANNEL selector on the transmitter, then tune the headphones with the TUNE control. [. . . ]