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Фрагмент инструкции
To get the best results and longest life out of your F-20B, we recommend that you carefully read this manual, and keep it in a safe place for future reference. Precautions . To avoid possible damage do not expose the unit to: • direct sunlight • very high or low temperature/humidity • sand or excessive dust * Especially inside a vehicle, the temperature may rise excessively — do not leave the F-20B in your parked car on a sunny day! . Before connecting/disconnecting cables or turning the unit on/off, be sure to set the VOLUME control on the F-20B to 0. . Keep the F-20B away from neon signs or fluorescent lighting to prevent noise pickup. . Handle the unit carefully — never apply excessive force to the controls and avoid dropping the unit. . For safety, always remove the power plug from the AC wall outlet if there is any danger of lightning striking in your area. . To prevent damage and possibly electrical shock, never open the case and tamper with the internal circuitry. . Never use solvents such as benzene or thinner to clean the F-20B. Wipe clean with a soft, dry cloth. Specifications Rated Output Power : 20 W Power Requirements : U.S. and Canadian models : 120V, 60Hz Speaker : 25 cm x 1 General model : 230V, 50Hz Controls : VOLUME, TREBLE, HIGH MID, LOW MID, BASS, Input Dimensions (W x H x D) : 357 x 453 x 242 mm (14.1" x 17.8" x 9.5") Level Select Switch (PASSIVE/ACTIVE) Weight : 10.5 kg (23 lbs 2 oz) Input/Output Terminals : INPUT, AUX IN, PHONES * Specifications and external appearance are subject to change without notice. Control Panel q INPUT : Connect your bass guitar to this jack. w PASSIVE/ACTIVE (Input Level Select Switch) : Select the setting that best matches the type of bass guitar you are using. Set the switch to its PASSIVE position (raise the switch ?) when using a passive type bass guitar (one without a built-in pre-amplifier). Set the switch to its ACTIVE position (depress the switch >) when using an active type bass guitar (one with a built-in pre-amplifier), or when the sound of a passive instrument has a lot of distortion. e VOLUME : Controls the volume level. Active Equalizer The center position (0) of each knob is “flat”, having no effect. Rotating the knob to the right (+) boosts the frequency while rotating the knob to the left (–) cuts the frequency. r TREBLE : Controls the level of the amplifier’s high frequencies. t HIGH MID : Controls the level of the amplifier’s upper middle frequencies. y LOW MID : Controls the level of the amplifier’s lower middle frequencies. u BASS : Controls the level of the amplifier’s low frequencies. i Power Indicator : The lamp will light when the F-20B’s power switch is ON. o AUX IN : Connecting the output of an external audio device, such as a CD, MD, cassette deck, etc., to this jack allows you to listen to the audio playback of the device while playing along on your bass guitar. * Use the volume control on the audio device to control its volume level. !0 PHONES : Connect a pair of headphones to this jack. * The speaker will produce no sound when a pair of headphones is connected to this jack. !1 POWER : This is the amplifier’s power switch. When the switch is ON, the power indicator i will light. qw ertyu io!0!1 IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS D POSSIBILITIES HAS BEEN INCLUDED IN THIS LIST. WARNING-When using any electrical or electronic product, basic 8. This product was NOT designed for use in wet/damp locations and precautions should always be followed. These precautions include, but are should not be used near water or exposed to rain. Examples of wet /damp not limited to, the following: locations are; near a swimming pool, spa, tub, sink, or wet basement. 1. Read all Safety Instructions, Installation Instructions, Special Mes-9. This product should be used only with the components supplied or; sage Section items, and any Assembly Instructions found in this manual a cart ,rack, or stand that is recommended by the manufacturer. If a cart, BEFORE making any connections, including connection to the main rack, or stand is used, please observe all safety markings and instructions supply. that accompany the accessory product. 2. Do not attempt to service this product beyond that described in the 10. The power supply cord (plug) should be disconnected from the user-maintenance instructions. All other servicing should be referred to outlet when electronic products are to be left unused for extended periods qualified service personnel. of time. Cords should also be disconnected when there is a high probability of lightening and/or electrical storm activity. 3. Main Power Supply Verification: Yamaha products are manufactured specifically for the supply voltage in the area where they are to be 11. Care should be taken that objects do not fall and liquids are not sold. If you should move, or if any doubt exists about the supply voltage in spilled into the enclosure through any openings that may exist. your area, please contact...
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