B&KメーカーST55.2の使用説明書/サービス説明書
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P/N13436 0702 B&K SB ! IMPL Y ETTER B&K Components, Ltd. ST55.2 OWNER’S MANUAL.
ii B&K Components, Ltd. , 2100 Old Union Road, Buffalo New York 14227-2725 Phone 1-800-543-5252 or (716) 656-0026, Fax (716) 656-1291 E-mail: info@bkcomp.
iii TABLE OF CONTENTS Table of Contents .............................................................................................................. ......................................iii Safety Pr ecauti ons .....................................
1 SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: to prevent fire or sh ock hazard, do not expose this unit to rain or moisture. Car e should be taken to prev ent objects or liquid from entering th e enclos ure. Never handle the po wer cord with wet hands.
2 PURPOSE AND FUNCTION The ST55.2 is a compact, very efficient, two channel power am plifier. It is designed for use in all types of audio or audio/video systems. The term versatile is al most adequate to describe the va riance of operational modes the ST55.
3 REAR PANEL R LEVEL L LEVEL HI LO HI LO BUS INPUT LEFT RIGHT LEFT RIGHT MONO BUS OUTPUT WHEN SWITCH IS SET TO ENABLE, THE AMPLIFIER WILL ONL Y OPERATE WHILE A 5-24VDC SIGNAL IS APPLIED TO CTRL IN WHE.
4 CONTROL MUTING A control is provided on each ST55.2 amplifier to allow re mote switching of mute on/off. The preamplifier’s cont rol output, such as is provided with B&K seri es preamplifiers, can be utilized to provide a contro l signal to the ST55.
5 LEVEL CONTROLS There are two level controls on the back of the amplifier. One level control for each channel. Whe n using the level controls, first start with them turned al l the way up (c lockwise). Then a djust them according to your system requirements to match the sound l evel coming from ea ch speaker.
6 Here is a typical amplifier setup: MINUS PLUS PLUS MINUS RIGHT LEFT Channel 1 (-) (+) (-) (+) Channel 2 INTERNAL BUS STRUCTURE In order to gain access to the internal bu s structure, you must first remove the top cover. Tu rn the amplifier so the rear panel is facing your.
7 MINUS PLUS PLUS MINUS RIGHT LEFT (-) (+) NOT USED RB U S L+R BUS LB U S NO VOL USE VOL JUMPER DESCRIPTION The jumper modules are used in configuring e ach channel. Each jumper termin al location is conveniently labeled as to the source it can be configured to provi de.
8 BRIDGED APPLICATION (HIGH VOLTAGE) The ST55.2 may be bridged to drive a high impedance spe aker. To use, place the source g roup jumper for both channels on the ‘L BUS’ j umper terminal. Place the volume group jumper for both channels on the ‘ NO VOL’ jumper terminal.
9 SYSTEM INSTALLATION There will most likely be a num ber of cables involved in the installation of your home entertainment system. Preplanning is essential in order to ma ximize system efficiency. We recommend the follo wing as a means of helping you reach that goal.
10 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plugged in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty 4. Control Input not activated. 1. Reconnect power cord.
11 SPECIFICATIONS Power Rating: 8 ohms 4 ohms 55 watts @ 1 kHz Not recommended THD (S+N) 0.09 % @ 1 kHz Frequency response 5 Hz – 45 kHz Input sensitivity 0.77 Volts Input impedance 33.2 k ohms Damping factor 100 Current (peak to peak) 20 Amps Slew rate 14 V / sec Dynamic headroom 1.
12 LIMITED WARRANTY B & K Components Ltd., referred to herein as B & K, warrants your B & K equipment against all d efects in material and workmanship for a period of five years from the date of purchase. This warranty applies o nly to the original purchaser and only to equip ment in normal residential use and service.
13 WWW.BKCOMP.COM B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 Phone: 716 – 656 - 0026.
デバイスB&K ST55.2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 ST55.2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 ST55.2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 ST55.2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 ST55.2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 ST55.2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 ST55.2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 ST55.2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 ST55.2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。
