Instruction/ maintenance manual of the product series II B&K
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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.
An important point after buying a device B&K series II (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought B&K series II yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data B&K series II - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, B&K series II you will learn all the available features of the product, as well as information on its operation. The information that you get B&K series II will certainly help you make a decision on the purchase.
If you already are a holder of B&K series II, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime B&K series II.
However, one of the most important roles played by the user manual is to help in solving problems with B&K series II. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&K series II along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
