Rotel-RB-981-OM 电路图 维修手册.pdf

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1、POWER POWER AMPLIFIER RB-981 PROTECTIONBRIDGED MONO RB-981 STEREO POWER AMPLIFIER AMPLIFICATEUR DE PUISSANCE STRO STEREO-ENDSTUFE FINALE DI POTENZA STEREO ETAPA DE POTENCIA ESTEREOFONICA Owners Manual Guide dutilisation Bedienungsanleitung Manuale di Istruzioni Manual de Instrucciones RadioFans.CN 收

2、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 PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER

3、 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 no user serviceable parts inside. Refer all servicing to qualified servi

4、ce 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 gets into the enclosure, immediately disconnect the power cord from the

5、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 warnings and safety information in these instructions and on the produ

6、ct 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 surface that could block the ventilation slots. If the unit is placed in a

7、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. The unit must be connected to a power supply only of the type and volt

8、age 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 defeat grounding and/or polarization provisions. The cable should be conn

9、ected 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, exposed to heat, or damaged in any way. Pay particular attention to the po

10、wer 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 inspected and/or serviced by a qualified service agency if: The power supply c

11、ord 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 unit on a fixed, level surface strong enough to support its weight. Do

12、 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 symbol is to alert the user to important operating and maintenance (service)

13、 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 POWER POWER AMPLIFIER RB-981 PROTECTIONBRIDGED MONO 1234 LEFTRIGHT SPEAKERS

14、 WARNING:TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUENE PAS OUVRIR SPEAKER IMPEDANCE STEREO 4 OHMS MINIMUM BRIDGED 8 OHMS MINIMUM POWER AMPLIFIER MODEL NO. RB-981 POWER CON

15、SUMPTION: 400W SERIAL NO. LEFT INPUTRIGHT INPUT 5567 STEREO POWER AMPLIFIER RB-981 RadioFans.CN 收音机爱 好者资料库 Figure 2:Stereo Connections Inputs and Speakers Branchements des entres et des enceintes en mode stro Anschludiagramm bei Stereobetrieb - Eingnge und Lautsprecher Collegamenti stereo - Ingressi

16、 e diffusori Entradas RCA y Terminales de Conexin a las Cajas Acsticas Figure 3:Bridged Mono Connections Inputs and Speakers Branchements des entres et des enceintes en pont mode mono Anschludiagramm bei Brckenschaltung - Eingnge und Lautsprecher Collegamenti mono configurazione “a ponte - Ingressi

17、e diffusori Conexiones para el Funcionamiento en Modo Monofnico Puenteado - Entradas RCA y Terminales de Conexin a las Cajas Acsticas PREAMP OUTPUTS RL LEFTRIGHT SPEAKERS WARNING:TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION RISK OF ELECTRI

18、C SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUENE PAS OUVRIR SPEAKER IMPEDANCE STEREO 4 OHMS MINIMUM BRIDGED 8 OHMS MINIMUM POWER AMPLIFIER MODEL NO. RB-981 POWER CONSUMPTION: 400W SERIAL NO. LEFT INPUTRIGHT INPUT ROTEL RB-981 PREAMPLIFIER / PRAMPLIFICATEUR / VORVERSTRKER / PREAMPLIFICATORE / PR

19、EAMPLIFICADOR PREAMP OUTPUTS RL LEFTRIGHT SPEAKERS WARNING:TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUENE PAS OUVRIR SPEAKER IMPEDANCE STEREO 4 OHMS MINIMUM BRIDGED 8 OHMS

20、MINIMUM POWER AMPLIFIER MODEL NO. RB-981 POWER CONSUMPTION: 400W SERIAL NO. LEFT INPUTRIGHT INPUT ROTEL RB-981 PREAMPLIFIER / PRAMPLIFICATEUR / VORVERSTRKER / PREAMPLIFICATORE / PREAMPLIFICADOR Jumper Locations Emplacement des Cavaliers Jumperposition Le posizioni dei ponticelli Ubicaciones de los P

21、uentes About Rotel A family whose passionate interest in music led them to manufac- ture high fidelity components of uncompromising quality 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 a

22、nd music lovers, regardless of their budget, is shared by all Rotel employees. The engineers work as a close team, listening to, and 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 produc

23、t the best they can. You are likely to find capacitors from the United Kingdom and Germany, semi conductors from Japan or the United States, while toroidal power transformers are manufactured in Rotels own factory. Rotels reputation for excellence has been earned through hun- dreds of good reviews a

24、nd awards from the most respected re- viewers in the industry, who listen to music every day. Their comments keep the company true to 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

25、 of enjoyment. Contents (circled numbers refer to illustration) About Rotel _ 1 Getting Started _ 2 A Few Precautions2 Placement2 AC Power and Control _ 2 AC Power Input 72 Power Switch 1 and Power Indicator 22 Protection Circuitry 32 Input Signal Connection _ 3 Input Signal Connection 53 Speaker Co

26、nnection _ 3 Speaker Selection3 Speaker Wire Selection3 Polarity and Phasing3 Stereo Speaker Connection 63 Bridged Mode Operation _ 4 Bridged Mono Indicator Light 44 Resetting Jumpers4 Input Connection4 Bridged Speaker Connection4 Troubleshooting _ 4 Front Panel Power Indicator Is Not Lit4 Fuse Repl

27、acement4 No Sound4 Protection Indicator Is Lit4 Specifications _ 25 1 English Getting Started Thank you for purchasing the Rotel RB-981 Stereo Power Ampli- fier. When used in a high-quality music or home theater system, it will provide years of musical enjoyment. The RB-981 is a high-power, two-chan

28、nel 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 quality. High current capa- bility allows the RB-981 to drive the most demanding loudspeakers. Be aware that

29、the RB-981 is capable of high power levels, in ex- cess of 130 watts per channel. Make sure that your speakers can handle the power of the RB-981. If in doubt about your speakers, ask your local Rotel audio retailer for advice. The RB-981 is straightforward in its installation and operation. If you

30、have experience with other stereo power amplifiers, you shouldnt find anything perplexing. Plug in a pair of high-quality RCA cables from your preamp into the amplifier inputs, wire up your speakers, and enjoy. A Few Precautions Please read this manual carefully. In addition to basic installation an

31、d operating instructions, it provides valuable information on various RB-981 system configurations as well as general informa- tion that will help you get optimum performance from your system. Please contact your authorized Rotel audio retailer for answers to any questions you might have. In additio

32、n, all of us at Rotel wel- come your questions and comments. Save the RB-981 shipping carton and all enclosed packing mate- rial for future use. Shipping or moving the RB-981 in anything other than the original packing material may result in severe dam- age to your amplifier. Fill out and send in th

33、e owners registration card packed with the RB-981. Also be sure to keep the original sales receipt. It is your best record of the date of purchase, which you will need in the event warranty service is ever required. Placement Because of its high power output, the RB-981 may generate con- siderable h

34、eat. The heat sinks and ventilation openings in the am- plifier are more than capable of dissipating this heat under normal conditions, but dont 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

35、reasonable air- flow around the amplifier. Use common sense when placing the amplifier in a cabinet or when stacking other equipment. Likewise, remember the weight of the amplifier when you select an installation location. Make sure that the shelf or cabinet can support its considerable bulk. Again,

36、 use common sense. AC Power and Control AC Power Input 7 Because of its high power rating, the RB-981 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 strip may be used if i

37、t (and the wall outlet) is rated to handle the current demanded by the RB-981 and all the other components connected to it. Be sure the power switch on the front panel of the RB-981 is turned off (in the out position). Then, connect the supplied power cord to the AC power outlet. Your RB-981 is conf

38、igured 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-981 amplifier to another cou

39、ntry, 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-981 exposes you to dangerous voltages. Consult a qualified service person or the Rotel factory service department for informatio

40、n. 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 located on the fron

41、t 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. Protection Circuitry 3 The RB-981 features a thermal

42、 protection circuit that protects the amplifier against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, the RB-981s protection circuit is independent of the audio signal and has no impact on sonic performance. Instead, the protection circuit monitors the

43、 temperature of the output devices and shuts down the amplifier if temperatures exceed safe limits. 2 STEREO POWER AMPLIFIER RB-981 Speaker Wire Selection Use insulated two-conductor stranded wire to connect the RB-981 to the speakers. The size and quality of the wire can have an au- dible effect on

44、 the performance of the system. Standard speaker wire will work, but can result in lower output or diminished bass response, particularly over longer distances. In general, heavier wire will improve the sound. For best performance, you may want to consider special high-quality speaker cables. Your R

45、otel audio retailer can help in the selection of appropriate cables for your system. Polarity and Phasing The polarity the positive/negative orientation of the connec- tions for every speaker and amplifier connection must be con- sistent so all the speakers will be in phase. If the polarity of one c

46、onnection is mistakenly reversed, bass output will be very weak and stereo imaging degraded. All wire is marked so you can iden- tify the two conductors. There may be ribs or a stripe on the insu- lation of one conductor. The wire may have clear insulation with different color conductors (copper and

47、 silver). There may be po- larity indications printed on the insulation. Identify the positive and negative conductors and be consistent with every speaker and amplifier connection. Stereo Speaker Connection 6 The RB-981 has two pairs of color coded binding posts on the back panel. These connectors

48、accept bare wire, connector lugs, or dual banana type connectors (except in the European Commu- nity countries where their use is not permitted). Route the wire from the RB-981 to the speakers. Give yourself enough slack so you can move the components enough to allow access to the speaker connectors

49、. If you are using dual banana plugs, connect them to the wires and then plug into the backs of the binding posts. The hexagonal thumbscrews of the binding posts should be screwed in all the way (clockwise). If you are using terminal lugs, connect them to the wires. If you are attaching bare wires directly