Rotel-RB-976-OM 电路图 维修手册.pdf

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1、POWER SIX CHANNEL POWER AMPLIFIER RB-976 LEVEL ADJUST BRIDGED MONO CHANNEL 12 A? 34 B? 56 C? RB-976 SIX CHANNEL POWER AMPLIFIER AMPLIFICATEUR DE PUISSANCE SIX CANAUX SECHSKANAL-ENDSTUFE AMPLIFICATORE DI POTENZA A SEI CANALI ETAPA DE POTENCIA DE SEIS CANALES Owners Manual Guide dutilisation Bedienung

2、sanleitung Manuale di Istruzioni Manual de Instrucciones RadioFans.CN 收音机爱 好者资料库 CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT. INSERT FULLY. APPLICABLE FOR USA, CANADA OR WHERE APPROVED FOR THE USAGE ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLU

3、S LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. WARNING: There are n

4、o user serviceable parts inside. Refer all servicing to qualified service personnel. WARNING: To reduce the risk of fire or electrical shock, do not expose the unit to moisture or water. Do not allow foreign objects to get into the enclosure. If the unit is exposed to moisture, or a foreign object g

5、ets into the enclosure, immediately disconnect the power cord from the wall. Take the unit to a qualified service person for in- spection and necessary repairs. Read all the instructions before connecting or operating the unit. Keep this manual so you can refer to these safety instructions. Heed all

6、 warnings and safety information in these instructions and on the product itself. Follow all operating instructions. Clean the unit only with a dry cloth or a vacuum cleaner. Keep the ventilation inlets on the unit unobstructed. For example, do not place the unit on a bed, sofa, rug, or similar surf

7、ace that could block the ventilation slots. If the unit is placed in a bookcase or cabinet, there must be sufficient clearance around the unit and ventilation of the cabinet to allow proper cooling. Keep the unit away from radiators, heat registers, stoves, or any other appliance that produces heat.

8、 The unit must be connected to a power supply only of the type and voltage specified on the rear panel of the unit. Connect the unit to the power outlet only with the supplied 2-pin polarized power supply cable or an exact equivalent. Do not modify the supplied cable in any way. Do not attempt to de

9、feat grounding and/or polarization provisions. The cable should be connected to a 2-pin polarized wall outlet, matching the wide blade of the plug to the wide slot of the receptacle. Do not use extension cords. Do not route the power cord where it will be crushed, pinched, bent at severe angles, exp

10、osed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where it exits the back of the unit. The power cord should be unplugged from the wall outlet if the unit is to be left unused for a long period of time. Immediately stop using the unit and have it inspect

11、ed and/or serviced by a qualified service agency if: The power supply cord or plug has been damaged. Objects have fallen, or liquid has been spilled, into the unit. The unit has been exposed to rain. The unit shows signs of improper operation The unit has been dropped or damaged in any way Place the

12、 unit on a fixed, level surface strong enough to support its weight. Do not place the unit on a moveable cart that could tip over. This symbol is to alert the user to the presence of uninsulated dangerous voltages inside the products enclosure that may constitute a risk of electric shock. This symbo

13、l is to alert the user to important operating and maintenance (service) instructions in this manual and literature accompanying the product. RadioFans.CN 收音机爱 好者资料库 Figure 1:Controls and Connections Commandes et Prises Bedienelemente und Anschlsse Controlli e collegamenti Controles y Conexiones POWE

14、R SIX CHANNEL POWER AMPLIFIER RB-976 LEVEL ADJUST BRIDGED MONO CHANNEL 12 A? 34 B? 56 C? 12 3 45 POWER AMPLIFIER MODEL NO. RB-976 POWER CONSUMPTION: 700W SPEAKER IMPEDANCE SERIAL NO. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. BRIDGED IN

15、PUT LEFT SPEAKERS BRIDGEDSTEREO C LR RIGHT BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO LINK B LR RIGHT BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO A LR RIGHT STEREO4 OHMS MINIMUM BRIDGED8 OHMS MINIMUM LINK 98 666777 88 SIX CHANNEL POWER AMPLIFIER RB-976 RadioFans.CN 收音机爱 好者资料库 Figure 2:Normal Connection

16、s Inputs and Speakers Branchements normaux - Prises dentre et enceintes Anschludiagramm bei normalem Betrieb (Eingangs- und Lautsprecheranschlsse) Collegamenti normali - Ingressi e diffusori Realizacin de las Conexiones - Entradas y Cajas Acsticas Figure 3:Bridged Mono Connections Inputs and Speaker

17、s Branchements en mono en mode pont - Prises dentre et enceintes Anschludiagramm bei Brckenschaltung (Eingangs- und Lautsprecheranschlsse) Collegamenti mono “a ponte” (Bridged) - Ingressi e diffusori Conexiones para el Funcionamiento en Modo Monofnico Puenteado - Entradas y Cajas Acsticas POWER AMPL

18、IFIER MODEL NO. RB-976 POWER CONSUMPTION: 700W SPEAKER IMPEDANCE SERIAL NO. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO LINK C LR RIGHT BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO LINK B LR RIGHT B

19、RIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO A LR RIGHT STEREO4 OHMS MINIMUM BRIDGED8 OHMS MINIMUM OUTPUTS FRONTREAR CENTER SUB LEFT RIGHT ROTEL RB-976 PREAMPLIFIER OR SIGNAL PROCESSOR LEFT FRONTRIGHT FRONT LEFT REARRIGHT REAR CENTER CHANNEL SUBWOOFER POWER AMPLIFIER MODEL NO. RB-976 POWER CONSUMPTION:

20、700W SPEAKER IMPEDANCE SERIAL NO. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO LINK C LR RIGHT BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO LINK B LR RIGHT BRIDGED INPUT LEFT SPEAKERS BRIDGEDSTEREO A

21、 LR RIGHT STEREO4 OHMS MINIMUM BRIDGED8 OHMS MINIMUM OUTPUTS FRONTREAR CENTER SUB LEFT RIGHT ROTEL RB-976 PREAMPLIFIER OR SIGNAL PROCESSOR LEFT FRONTLEFT REAR CENTER CHANNEL About Rotel A family whose passionate interest in music led them to manufac- ture high fidelity components of uncompromising q

22、uality founded Rotel over 30 years ago. Through the years that passion has re- mained undiminished and the family goal of providing exceptional value for audiophiles and music lovers, regardless of their budget, is shared by all Rotel employees. The engineers work as a close team, listening to, and

23、fine tuning each new product until it reaches their exacting musical stan- dards. They are free to choose components from around the world in order to make that product the best they can. You are likely to find capacitors from the United Kingdom and Germany, semi conductors from Japan or the United

24、States, while toroidal power transformers are manufactured in Rotels own factory. Rotels reputation for excellence has been earned through hun- dreds of good reviews and awards from the most respected re- viewers in the industry, who listen to music every day. Their comments keep the company true to

25、 its goal the pursuit of equipment that is musical, reliable and affordable. All of us at Rotel thank you for buying this product and hope it will bring you many hours of enjoyment. Getting Started Thank you for purchasing the Rotel RB-976 Six Channel Power Amplifier. When used in a high-quality mus

26、ic or home theater sys- tem, it will provide years of musical enjoyment. The RB-976 is a high-power, six-channel power amplifier, provid- ing the highest level of audio performance. Discrete output de- vices, a massive power supply, premium components, and Rotels Balanced Design ensure superb sound

27、quality. High current capa- bility allows the RB-976 to drive the most demanding loudspeakers. Be aware that the RB-976 is capable of high power levels, in ex- cess of 60 watts per channel. Make sure that your speakers can handle the power of the RB-976. If in doubt about your speakers, ask your aut

28、horized Rotel dealer for advice. The RB-976 is straightforward in its installation and operation. If you have experience with other power amplifiers, you shouldnt find anything perplexing. Plug in the cables from your preamp into the amplifier inputs, wire up your speakers, and enjoy. A Few Precauti

29、ons Please read this manual carefully. In addition to basic installation and operating instructions, it provides valuable information on various RB-976 system configurations as well as general informa- tion that will help you get optimum performance from your system. Please contact your authorized R

30、otel dealer for answers to any questions you might have. In addition, all of us at Rotel welcome your questions and comments. Contents (circled numbers refer to illustration) About Rotel _ 1 Getting Started _ 1 A Few Precautions1 Placement2 Protection Circuitry2 AC Power and Control _ 2 AC Power Inp

31、ut 92 Power Switch 1 and Power Indicator 22 Channel and Bridged Mono Indicator Lights 3 42 Level Adjust Controls 52 Input Configuration and Connection _ 3 Input Selector Switches 73 Input Signal Connection 63 Speaker Connection _ 3 Speaker Selection3 Speaker Wire Selection3 Polarity and Phasing3 Ste

32、reo Speaker Connection 83 Bridged Mono Operation_ 4 Input Connection4 Bridged Speaker Connection4 Troubleshooting _ 4 Front Panel Power Indicator Is Not Lit4 Fuse Replacement4 No Sound4 Specifications _ 25 1 English Save the RB-976 shipping carton and all enclosed packing mate- rial for future use.

33、Shipping or moving the RB-976 in anything other than the original packing material may result in severe dam- age to your amplifier. Fill out and send in the owners registration card packed with the RB-976. Also be sure to keep the original sales receipt. It is your best record of the date of purchas

34、e, which you will need in the event warranty service is ever required. Placement Because of its high power output, the RB-976 may generate con- siderable heat. The heat sinks and ventilation openings in the am- plifier are more than capable of dissipating this heat under normal conditions, but dont

35、smother your amplifier. There must be ad- equate clearance around the chassis. The ventilation slots in the top cover must be unblocked, and there must be reasonable air- flow around the amplifier. Use common sense when placing the amplifier in a cabinet or when stacking other equipment. Likewise, r

36、emember the weight of the amplifier when you select an installation location. Make sure that the shelf or cabinet can support its considerable bulk. Again, use common sense. Protection Circuitry The RB-976 features a thermal protection circuit that protects the amplifier against potential damage in

37、the event of extreme or faulty operating conditions. Unlike many designs, the RB-976s protection circuit is independent of the audio signal and has no impact on sonic performance. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if temperatu

38、res exceed safe limits. Most likely, you will never see this protection circuitry in action. However, should a faulty condition arise, one or more channels of the amplifier will stop playing. If this happens, turn the amplifier off, let it cool down for several minutes, and attempt to identify and c

39、orrect the problem that caused the protection circuitry to engage. When you turn the am- plifier back on, the protection circuit will automatically reset. In most cases, the protection circuitry activates because of a fault condition such as shorted speaker wires, or inadequate ventila- tion leading

40、 to an overheating condition. In very rare cases, highly reactive or extremely low impedance speaker loads could cause the protection circuit to engage. If the protection circuitry triggers repeatedly and you are unable to isolate and correct the faulty condition, contact your authorized Rotel deale

41、r for assistance in troubleshooting. AC Power and Controls AC Power Input 9 Because of its high power rating, the RB-976 can draw consider- able current. Therefore, it should be plugged directly into a 2-pin polarized wall outlet. Do not use an extension cord. A heavy duty multi-tap power outlet str

42、ip may be used if it (and the wall outlet) is rated to handle the current demanded by the RB-976 and all the other components connected to it. Be sure the power switch on the front panel of the RB-976 is turned off (in the out position). Then, connect the supplied power cord to the AC power outlet.

43、Your RB-976 is configured at the factory for the proper AC line voltage in the country where you purchased it (either 115 volts AC or 230 volts AC with a line frequency of either 50 Hz or 60 Hz). The AC line configuration is noted on a decal on the back panel. Note: Should you move your RB-976 ampli

44、fier to another country, it is possible to reconfigure your amplifier for use on a different line voltage. Do not attempt to perform this conversion yourself. Opening the enclosure of the RB-976 exposes you to dangerous voltages. Consult a qualified service person or the Rotel factory service depart

45、ment for information. If you are going to be away from home for an extended period of time such as a month-long vacation, it is a sensible precaution to unplug your amplifier (as well as other audio and video compo- nents) while you are away. Power Switch 1 and Power Indicator 2 The power switch is

46、located on the front panel of your amplifier. To turn the amplifier on, push the switch in. The LED indicator above the switch will light, indicating that the amplifier is turned on. To turn the amplifier off, push the button again and return it to the out position. Channel and Bridged Mono Indicato

47、r Lights 3 4 When a channel pair is in stereo mode the two channel indicator lights for those channels will light. When a channel pair is in Bridged Mono mode, the two Channel Indicator Lights are turned off and the Bridged Mono Indicator Light for that channel pair is turned on. Refer to the Input

48、Configuration and Connection section on the following page for more information. Level Adjust Controls 5 The Level Adjust controls enable you to individually adjust the in- put sensitivity of the three channel pairs. They can be used to set the sound output balance of the speakers in a home theater

49、sys- tem, or control the volume level in the various rooms when the RB-976 is used to drive the speakers in a multi-room installation. The setting of the Input Selector Switch does not affect the opera- tion of the Level Adjust controls. 2 SIX CHANNEL POWER AMPLIFIER RB-976 Speaker Connection Speaker Selection We re