Manuale d’uso / di manutenzione del prodotto ST260 del fabbricante B&K
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ST260 Two Channel Amplifier OWNER’S MANUAL B & K Components Ltd. 12997 REV 050500.
B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227.
Page 1 Table of contents Safety Precautions Page 2 Purpose and function Page 3 Design and construction Page 3 Features Page 4 Rear panel view Page 4 Rear panel description Page 5 Control muting Page 5.
Page 2 SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The li g htnin g flash with arrowhead, within an equilate.
Page 3 The ST260's purpose and function The ST260 is a compact, very efficient, two channel power amplifier. It is designed to be used in all types of audio or audio/video systems. The term versatile is almost adequate to describe the variance of operational modes the ST260 is capable of providing.
Page 4 )LJXUH$ Features Toroidal Transformer - Efficient hi g h current transformer for improved d y namics. Discrete Circuitry - More accurate and three dimensional reproduction of source material. Limited Protection - Provides short term protection from accidental shortin g of output devices and protection from thermal overload.
Page 5 Rear panel description 1. AC fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt Slow Blow fuse. Replace with same type and value fuse only. 2. AC Input receptacle - For attaching the supplied AC power cord to the amplifier. 3.
Page 6 )LJXUH% If the control function is desired, each unit in the system must remain connected at all times and the control must be enabled. To enable the control function, the CTRL ENABLE button must be out for each controllable amplifier in the system.
Page 7 )LJXUH& )LJXUH' Example: When using 4 ohm and 8 ohm speakers together, the 4 ohm may sound louder then 8 ohm at a given volume level. The level controls on the amplifier are used to match the speakers volume level. Clockwise will increase the output.
Page 8 )LJXUH( Outputs Five wa y bindin g posts are provided. One pair for each channel. The y are desi g ned to accept a banana-t y pe plu g or spade lu g connector (shown below) and are color coded for eas y identification. The red (+) post should alwa y s be connected to the speakers (+) jack.
Page 9 )LJXUH) )LJXUH* ST260’s internal bus structure In order to g ain access to the internal bus structure, y ou must first remove the top cover. Turn the amplifier so the rear panel is facin g y our. The jumper modules ma y be seen on the circuit board just behind the level controls.
Page 10 R BUS - Along with being the right channel input, it is used as the input to the right bus and the right source for the ‘L+R BUS’. Because it is a BUS input, any signal input here will appear at the ‘R BUS’ jumper terminal for both of the ST260’s jumper modules.
Page 11 )LJXUH+ )LJXUH, )LJXUH- Mono application (Medium current) The ST260’s two output channels ma y be paralleled (mono) to combine the left and ri g ht channels output current. This feature allows the amplifier to double its apparent output current.
Page 12 )LJXUH. )LJXUH/ )LJXUH0 Brid g ed application (Hi g h volta g e) The ST260 ma y be brid g ed to drive a hi g h impedance speaker. To use, place the source g roup jumper for both channels on the ‘L BUS’ jumper terminal. Place the volume g roup jumper for both channels on the ‘NO VOL’ jumper terminal.
Page 13 System installation There will most likely be a number of cables involved in the installation of your home entertainment system. Pre-planning is essential in order to maximize system efficiency.
Page 14 Connect the wires from your speakers to the appropriate output on the amplifier. It is absolutely essential that you observe correct polarity in these connections.
Page 15 Troubleshooting PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plu gg ed in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty. 4. Control switch in the wron g position. 1. Reconnect power cord.
Page 16 ST260 SPECIFICATIONS Power rating: 8 ohms 60 watts @ 1 kHz 4 ohms Not recommended Frequency response 5 Hz - 45 kHz Input sensitivity 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 rate 14 V / ) sec Dynamic headroom 1.
Page 17 Limited Warrant y 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 716-656-0023 www.bkcomp.com.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il B&K ST260 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del B&K ST260 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso B&K ST260 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul B&K ST260 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il B&K ST260, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del B&K ST260.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il B&K ST260. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo B&K ST260 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
