YamahaメーカーYST-SW225の使用説明書/サービス説明書
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YST-SW225 Subwoofer System UB OWNER’S MANUAL YST-SW225UB.book Page 1 Tu es day, July 27, 2004 10:25 AM.
i IMPOR T ANT SAFETY INSTR UCTIONS 1 Read these instructions. 2 Keep these instructions. 3 Heed all warnings. 4 Follow all instructions. 5 Do not use this a ppar atus near water. 6 Clean only with dry cloth. 7 Do not block any ventilat ion openings. Install in accordance with t he manuf acturer’s in structions.
ii W e W ant Y ou Listening For A Lifet ime YAMAHA and the Electronic Industries Association’s Consumer Electronics Group want you to get the most out of your equipment by playing it at a safe level.
iii Thank you for selecting th is YAMAHA subwoofer system. Please read the followi ng operating precautions before use. YAMAHA will not be held resp onsible for any damage and/or injury caused by not following the cau tions below. • To assure the finest perfo rmance, please r ead this manual carefully.
1 • VOLTAGE SELECTOR (Asia and General models only) The voltage selector switch on the rear panel of this unit must be set for your local main voltage BEFORE plugging this unit into the AC main supply. Voltages are 110-120/220-240 V AC, 50/60 Hz. For U.
2 • This subwoofer system em ploys Advanced Yamaha Active Servo Technol ogy II which Yamaha has developed for reproducing higher quality super-bass sound. (Refer to page 14 for details on Advanced Yamaha Active Servo Tec hnology II.) This super-bass sound adds a more realistic , theater-in-the-home effect to your stereo system.
3 ( : subwoofer, : front speaker) One subwoofer will have a good effect on your audio system, however, the use of two subwoofers is recommended to obtain more effect. If using one subwoofer, it is recommended to place it on the outside of either the right or the left front speaker.
4 Choose one of the following two connecting method s that is more suitable for your audio system. ■ Choose (pages 4-5) if your amplifier has line output (pin jack) terminal(s) ■ Choose (pages 6-7.
5 CONNECTIONS ■ Using one subwoofer ■ Using two subwoofers OUTPUT TO SPEAKERS INPUT 1 FROM AMPLIFIER INPUT 2 PHASE AUTO STANDBY HIGH VOLTAG E SELECTOR POWER ON OFF 220V-240V 11 0V-120V LOW OFF NOR.
6 CONNECTIONS Select this method if your amplifier ha s no line output (pin jack) terminal. If y our amplifier has two sets of fr ont speaker output terminals and both terminals ca n output sound signals sim ultaneously .
7 CONNECTIONS If y our amplifier has only one set of fr ont speaker output terminals. Connect the speaker output terminals of the amplifier to the INPUT1 terminal s of the subwoofer, and connect the OUTPUT terminals of the subwoof er to the front speakers.
8 CONNECTIONS For connection, keep the sp eaker cables as short as possible. Do not bundle or roll up the excess part of the cables. If the connections are faulty, no sound will be heard from the subwoofer or the speakers, or both of them. Make sure that the + and – polarity markings of the speaker cables are observed and set correctl y.
9 1 Power indicator Lights up in green while the subwoofer is on. Lights up in red while the subwoofer is set in the standby mode by the operation of the automatic power- switching function.
10 CONTROLS AND THEIR FUNCTIONS 5 HIGH CUT control Adjusts the high freque ncy cut off point. Frequencies higher than the frequency selected by this control are all cut off (and no output). * One graduation of this control represents 10 Hz. 6 VOLUME control Adjusts the volume level.
11 This function automatic ally switches th e unit between standby and p ower-on modes. The subwoofer automatically places itself in standby mode if it does not receive an input signal for 7 or 8 minutes.
12 Before using the subwoofer, adjust the subwoofer to obtain the optimum volume and tone balance between the subwoofer and the front speakers by followi ng the procedures described below. 1 Set the VOLUME control to minim um (0). 2 Turn on the power of all the other components.
13 ADJUSTING THE SUBWOOFER BEFORE USE This subw oofer’ s frequency c haracteristics The figures below show the optimum adjustment of each co ntrol and the frequency characteristics when this subwoofer is combined with a typical front spea ker system.
14 In 1988, Yamaha brought to the marketplace speaker systems utilizing YST (Yamaha Active Servo Technology) to give powerful, high qual ity bass reproduction. This technique uses a di rect connection between the amplifier and speaker, allowing accura te signal transm ission and precise speaker control.
15 Refer to the chart below when this unit does not function p rope rly. If the problem you are expe riencing is not listed below or if the instructions given below do not help, disconnect the power cord and contact your authoriz ed YAMAHA dealer or service center.
Type ..... ..... Advanced Yamaha Active Servo Technology Driver ........... ........... ............. .......20 c m (8”) cone woofer Magnetic shielding type Amplifier Output (100 Hz, 5 ohms, 10% THD) .................................................
デバイスYamaha YST-SW225の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Yamaha YST-SW225をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはYamaha YST-SW225の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Yamaha YST-SW225の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Yamaha YST-SW225で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Yamaha YST-SW225を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はYamaha YST-SW225の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Yamaha YST-SW225に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちYamaha YST-SW225デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
