User manual YAMAHA YST-FSW100

[. . . ] UCA YST-FSW100 i IMPORTANT SAFETY INSTRUCTIONS 1 2 3 4 CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. Read these instructions. Install in accordance with the manufacturer's instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] A vessel with water in it If the vessel falls by vibrations and water spills, it may cause damage to the speaker, and/or you may get an electric shock. · Do not place this unit where foreign objects such as water drips might fall. It might cause a fire, damage to this unit, and/or personal injury. · Never put a hand or a foreign object into the YST port located on the right side of this unit. When moving this unit, do not hold the port as it might cause personal injury and/or damage to this unit. · Never place a fragile object near the YST port of this unit. If the object falls or drops by the air pressure, it may cause damage to the unit and/or personal injury. It might cause an electric shock since this unit uses a high voltage. It might also cause personal injury and/or damage to this unit. · When using a humidifier, be sure to avoid condensation inside this unit by allowing enough spaces around this unit or avoiding excess humidification. Condensation might cause a fire, damage to this unit, and/or electric shock. · Super-bass frequencies reproduced by this unit may cause a turntable to generate a howling sound. In such a case, move this unit away from the turntable. · This unit may be damaged if certain sounds are continuously outputted at high volume level. For example, if 20 Hz-50 Hz sine waves from a test disc, bass sounds from electronic instruments, etc. are continuously outputted, or when the stylus of a turntable touches the surface of a disc, reduce the volume level to prevent this unit from being damaged. · If you hear distorted noise (i. e. , unnatural, intermittent "rapping" or "hammering" sounds) coming from this unit, reduce the volume level. Extremely loud playing of a movie soundtrack's low frequency, bass-heavy sounds or similarly loud popular music passages can damage this subwoofer system. · Vibration generated by super-bass frequencies may distort images on a TV. In such a case, move this unit away from the TV set. · Do not attempt to clean this unit with chemical solvents as this might damage the finish. · Be sure to read the "TROUBLESHOOTING" section regarding common operating errors before concluding that the unit is faulty. [. . . ] A subwoofer cable is not connected securely. Remedy Turn the power switch OFF, then connect the power plug securely. Turn the VOLUME control to the right (clockwise). Connect a subwoofer cable securely. Sound level is too low. You are playing a sound source that Play a sound source that includes includes inadequate bass frequencies. The sound level has been diminished by standing waves. [. . . ]