User manual YAMAHA SW118III

[. . . ] Heat ­ The unit should be situated away from heat sources such as radiators, stoves, or other appliances that produce heat. supply only of the type described in the operating instructions or as marked on the unit. 8 CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. · Explanation of Graphical Symbols The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert you to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. 9 10 Power Sources ­ The unit should be connected to a power 11 Power-Cord Protection ­ Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the unit. 12 Cleaning ­ The unit should be cleaned only as recommended by the manufacturer. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. 13 Nonuse Periods ­ The power cord of the unit should be unplugged from the outlet when left unused for a long period of time. 14 Object and Liquid Entry ­ Care should be taken so that objects do not fall into and liquids are not spilled into the inside of the unit. 1 2 3 4 5 Read Instructions ­ All the safety and operating instructions should be read before the unit is operated. [. . . ] Do not attempt to clean the unit with chemical solvents; this might damage the finish. Be sure to read the "TROUBLESHOOTING" section regarding common operating errors before concluding that the unit is faulty. When not planning to use this unit for long periods of time (ie. , vacation, etc. ), disconnect the AC power plug from the wall outlet. To prevent lightning damage, disconnect the AC power plug when there is an electrical storm. Since this unit has a built-in power amplifier, heat will radiate from the rear panel. Therefore, place the unit apart from the walls, allowing a space of at least 10 cm (3-15/16") above, behind and on the both sides of the unit. Also, do not position with the rear panel facing down on the floor or other surface. In such a case, move this unit away from the turntable. IMPORTANT Please record the serial number of this unit in the space below. Serial No. : The serial number is located on the rear of the unit. Retain this Owner's Manual in a safe place for future reference. In such a case, face the unit obliquely to the wall. It also may be necessary to break up the parallel surfaces by placing bookshelves etc. along the walls. 5 CONNECTIONS · Before attempting to make any connections to or from this unit, be sure to first switch OFF the power to this unit and to any other components to which connections are being made. · When making connections between this unit and other components, be sure all connections are made correctly and consistently, that is to say L (left) to L, R (right) to R, "+" to "+" and "­" to "­". · This unit can be connected to either the speaker terminals or the line output (pin jack) terminals of the amplifier. Choose one of the ways shown below according to your audio system. If connected, they will not produce sound. · When connecting to a monaural line output terminal of the amplifier, connect to either the left or right INPUT 2 terminal. 8 English CONTROLS AND THEIR FUNCTIONS 1 5 INPUT2 AUTO POWER STANDBY-RED ON-GREEN INPUT2 AUTO POWER STANDBY-RED ON-GREEN ON OFF INPUT1 FROM AMPLIFIER OFF ON INPUT1 FROM AMPLIFIER POWER HIGH CUT VOLUME 50 Hz 150 Hz 0 10 OUTPUT TO SPEAKERS POWER HIGH CUT VOLUME 50 Hz 150 Hz 0 10 OUTPUT TO SPEAKERS 2 3 4 1 POWER indicator Lights in green when the POWER switch is turned ON, and goes off when turned OFF. * STANDBY mode: If the AUTO POWER ON/OFF switch on the rear panel is set to ON, this indicator lights in red when no signal is input to this unit. 5 AUTO POWER ON/OFF switch By setting this switch to the ON position, this unit's automatic power ON/OFF function operates as described below. If you do not need this function, set to the OFF position. * Make sure to change the setting of this switch only when the power of this unit is off. [. . . ] Active Servo Processing speakers reproduce the bass frequencies through an "air woofer", which is a port or opening in the speaker's cabinet. This opening is used instead of, and performs the functions of, a woofer in a conventionally designed speaker system. Thus, signals of low amplitude within the cabinet can, according to the Helmholtz resonance theory, be output from this opening as waves of great amplitude if the design is such that the size of the opening and the volume of the cabinet are in the correct proportion to satisfy a certain ratio. In order to accomplish this, moreover, the amplitudes within the cabinet must be both precise and of sufficient power because these amplitudes must overcome the "load" presented by the air that exists within the cabinet. [. . . ]