User manual SONY SRS-A3

[. . . ] Should you notice an abnormality in it, disconnect it from the AC outlet immediately. The system is not disconnected from the mains as long as it is connected to the AC outlet, even if the system itself has been turned off. To avoid damaging the system do not use any other AC power adaptor. [. . . ] Do not place the AC power adaptor on a bookshelf or in a confined place, such as a cabinet. To avoid fire or electric shock do not use the AC power adaptor in a place subject to liquid or moisture. The sound may not come through the right speaker. notes If the PC volume adjustment (master volume , WAV volume , etc. For details on volume adjustment on your PC, refer to its operating instructions. Make sure the connection of the stereo mini plug and the jack of the source device is made properly. If connecting the system via a device with a built-in radio or tuner, radio broadcasts or TV sound may not be received, or sensitivity may be reduced significantly. If you remove the input cable while the source device (PC, etc) is working, the equipment or your ears may be damaged by unexpected loud sound. Be sure to lower the volume of the source device (PC, etc) and turn off the system when removing the input cable from the source device. Turn down the volume of the source device to the point where the sound is no longer distorted. There is hum or noise in the system output. Make sure no audio devices are positioned too close to the TV set. The brightness of the POWER indicator may become unstable when the volume is turned up. The sound comes through only one speaker. [. . . ] In the case of a personal computer, take appropriate measures such as data storage before turning off. if no improvement is apparent , locate the system farther away from the TV set/personal computer. Furthermore, be sure not to place objects in which magnets are attached or used, such as audio racks, TV stands, toys, etc. [. . . ]