B&Kメーカーseries IIの使用説明書/サービス説明書
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Reference 7270 series II Seven Channel Amplifier OWNER’S MANUAL B & K Components Ltd. P/N 13009 Rev.0102.
B&K Components, Ltd 2100 Old Union Road Buffalo, New York 14227 P/N 13009 Rev.0102.
TABLE OF CONTENTS Safety Precautions page 2 Purpose and function page 3 Design and construction page 3 Features page 3 Rear panel view page 4 Rear panel description page 4 Level controls page 5 Inputs.
SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The lightning flash with an arrowhead, within an equilateral tri.
THE REFERENCE 7270 SERIES II PURPOSE AND FUNCTION The Reference 7270 series II is a high current, seven channel power amplifier. It is designed to be used in all types of audio or audio/video systems.
Rear Panel View 1. AC fuse holder 4. Amplifier control muting input/output 2. AC Input receptacle 5. Level controls 3. Speaker outputs 6. Inputs 7. Speaker fuses REAR PANEL DESCRIPTION 1. AC fuse holder - Holds the AC Line fuse. This fuse is a 15 Amp / 250 Volt Slow Blow fuse.
LEVEL CONTROLS THX certified units are denoted by the THX Ultra logo on the faceplate of the unit. For use in THX reference theater system, the level controls must be set to the full clockwise position (highest possible level). Generally in a home theater application, the level controls on the rear will not be used.
Here is a typical preamplifier to amplifier setup: OUTPUTS Five way binding posts are provided. There is one pair provided for each channel. They are designed to accept a banana-type plug, spade-lug connector (shown below), terminal posts, and bare wire, and they are color coded for easy identification.
SYSTEM INSTALLATION There will most likely be a number of cables involved in the installation of your home entertainment system. Preplanning is essential in order to maximize system efficiency.
MAKING THE CONNECTION Before doing anything, insure that the power switch on the amplifier’s front panel is in the ‘off’ position. Again, it is recommended that you locate a separate AC power outlet for the amplifier, one that is not shared by any other audio component in the system or any other household component.
CONTROL MUTING A control is used to “trigger” various outboard amplifiers, projectors, or other accessories by sending a specified voltage when a certain mode or source is selected from the source of the control voltage “trigger”.
TROUBLESHOOTING 1. Replace blown rail fuse inside amplifier 1. Blown rail fuse Channel sounds distorted and low in output 1. Check all connectors and repair as necessary. 1. Poor g round connection in inter- connect cables. Loud hum or buzz on one or more channels 1.
REFERENCE 7270 SERIES II SPECIFICATIONS Power rating: 8 ohms 200 watts @ 1 kHz 4 ohms 375 watts @ 1 kHz Frequency response 5 Hz - 45 kHz Input sensitivity 1.4 Volts THD (S+N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damping factor 450 Current (peak to peak) 75 Amps Slew rate 14 V / µ sec Dynamic headroom 1.
LIMITED WARRANTY B&K Components Ltd., referred to herein as B&K, warrants your B&K equipment a g ainst all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the ori g inal purchaser and only to equipment in normal residential use and service.
B&K Components, Ltd 2100 Old Union Road Buffalo, New York 14227 P/N 13009 Rev.0102.
B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 www.bkcomp.com P/N 1 300 9 Rev. 0 102.
デバイスB&K series II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 series II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 series II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 series II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 series II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 series II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 series II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 series II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 series II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。
