B&KメーカーST1200 Seriesの使用説明書/サービス説明書
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B & K Components Ltd. P/N 12687.
B&K Components, Ltd., 2100 Old Union R oad, Buffalo, New York 14227.
Page 1 Safety Precautions Page 2 Purpose and function Page 3 Design and constr uction Page 3 Features Page 4 Rear panel v iew Page 4 Rear panel descr iption Page 5 Control muti ng Pag e 5 - 6 Level co.
Page 2 WA RNING: TO PREVENT FIRE OR SHOCK HA ZA RD, DO NOT EXPOSE THIS UNIT TO RA IN OR MOISTURE. The lightning fl ash with arrowhead, wi thin an equilater al tri angle, is intended to al ert the user.
Page 3 The ST1200 series II is a compact, very efficient, two channel pow er amplifier . It is designed to be used in al l types of audio or audi o/video sy stems. The term versatile is almost adequate to descri be the vari ance of operational modes the ST1200 series II is capable of providi ng.
Page 4 - Efficient high curr ent transformer for improved dy namics. - More accur ate and three dimensional r eproduction of source material. - Prov ides short term protecti on from accidental shorting of output devic es and protection from thermal over load.
Page 5 1. A C fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt Slow Bl ow fuse. Replace w ith same type and value fuse only. 2. A C Input receptacle - For attaching the suppl ied AC pow er cord to the amp lifier. 3. Speaker outputs - For connecting the speaker s to the amplifier.
Page 6 If the control function is desired, each uni t in the system must remai n connected at all times and the control must be enabled. To enabl e the control function, the CTRL ENABLE button must be out for each controllabl e amplifier in the sy stem.
Page 7 Example: W hen using 4 ohm and 8 ohm speakers together, the 4 ohm may sound louder then 8 ohm at a g iven v olume level. The l evel contr ols on the ampli fier are used to match the speakers volume level. Clockwise w ill increase the output. Counter clockwise will decrease the outp u t.
Page 8 Five w ay binding posts are pr ovided. One pai r for each channel. They ar e designed to accept a banana-type pl ug or spade lug connector (show n below) and are color coded for easy identificati on. The red (+) post should alw ays be connected to the speakers ( +) jack.
Page 9 In order to g ain access to the internal bus structur e, you must first r emove the top cover . Turn the amplifier so the rear panel i s facing y our. The jumper modul es may be seen on the circuit boar d just behind the lev el controls. Below i s the default setup for the ST1200 series II amplifier.
Page 10 Along w ith being the right channel input, it is used as the i nput to the right bus and the right sour ce for the ‘L+R BUS’ . Because it is a BUS i nput, any signal input here w ill appear at the ‘R BUS’ jumper terminal f o r both of the ST1200 series II ’ s jumper modul es.
Page 11 The ST1200 series II ’s tw o output channels may be parallel ed (mono) to combine the left and right channels output cur rent. This feature all ows the ampli fier to double its apparent output current. To use, pl ace the source group j umper for both channels on the ‘L BUS’ jumper terminal.
Page 12 The ST1200 series II may be bridg ed to driv e a high i mpedance speaker. To use, place the source gr oup jumper for both channels on the ‘L BU S’ jumper terminal . Place the volume g roup jumper for both channels on the ‘ NO VOL’ jumper ter minal.
Page 13 There will most like ly be a n umbe r of cable s in volved in the installatio n of your ho m e entertainment sy stem. Pre-planning is essential in order to max imiz e system efficiency.
Page 14 Connect the wi res from your speakers to the appropriate output on the ampl ifier. It is absolutely essential that you observ e correct polari ty in these connecti ons. Double check all connecti ons. Plug the ampli fier’s power cord into the AC pow er source.
Page 15 PROBLEM POSSIBLE CA USE POSSIBLE SOLUTION No sound 1. Power cord not plugged in. 1. Reconnect power cord. (‘on’ LED not illuminated) 2. Power off at AC source. 2. Check AC switch or fuse. 3. AC power inlet fuse blown 3. Check for shorts or or faulty.
Page 16 Power rating: 8 ohms 60 watts @ 1 kHz 4 ohms Not recommended Frequency response 5 Hz - 45 kHz Input sensitiv ity 0.77 Volts THD (S+ N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damping factor 100 Current ( peak to peak) 20 Amps Slew r ate 14 V / ) sec Dynami c headroom 1.
Page 17 B&K Components Ltd., referred to herein as B&K, warrant s your B&K equipment against all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to t he original purchaser and only to equipment in norm al residential use and service.
B&K Com ponents, Ltd. 2100 O l d Union Road Buf fa l o, New York 14227 716-656- 0023 www. bk co mp. co m.
デバイスB&K ST1200 Series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：
B&K ST1200 Series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B&K ST1200 Series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。B&K ST1200 Series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。B&K ST1200 Series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。
B&K ST1200 Series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B&K ST1200 Series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、B&K ST1200 Series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B&K ST1200 Series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。
