Rotel-RC-971-OM 电路图 维修手册.pdf

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1、RC-971 STEREO CONTROL AMPLIFIER PRAMPLIFICATEUR STRO STEREO-VORVERSTRKER PREAMPLIFICATORE STEREO PREAMPLIFICADOR ESTEREOFONICO STEREO VOORVERSTERKER Owners Manual Manuel de lutilisateur Bedienungsanleitung Manuale di Istruzioni Manual de Instrucciones Gebruiksaanwijzing VOLUME L R LISTENING TUNER CD

2、 AUX TAPE 1 TAPE 2 RECORDING TUNER OFF CD AUX TAPE 1 STEREO CONTROL AMPLIFIER RC-971 POWERPHONESBASSTREBLE OFF TONE ON 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

3、: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS 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

4、SERVICING TO QUALIFIED SERVICE PERSONNEL. WARNING: There are no 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 enclos

5、ure. If the unit is exposed to moisture, or a foreign object gets 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

6、manual so you can refer to these safety instructions. Heed all 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 examp

7、le, 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 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

8、 registers, stoves, or any other appliance that produces heat. 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

9、not modify the supplied cable in any way. Do not attempt to defeat 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

10、 where it will be crushed, pinched, bent at severe angles, exposed 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 perio

11、d of time. Immediately stop using the unit and have it inspected 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 opera

12、tion 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 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 encl

13、osure that may constitute a risk of electric shock. This symbol 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 3 Figure 1:Controls and Connections Commandes et branchements Bedieneleme

14、nte und Anschlsse Controlli e Collegamenti Controles y Conexiones De bedieningsorganen en de ingangen voor de bronnen TAPE 1 INOUT AUXCDTUNERTAPE 2 INOUT OUTPUTS 12 LEFT RIGHT CONTROL AMPLIFIER MODEL NO. RC-971 POWER CONSUMPTION: 10W AC 3.3A 400W MAX SWITCHED LEFT RIGHT SERIAL NO. 913101112 VOLUME L

15、 R LISTENING TUNER CD AUX TAPE 1 TAPE 2 RECORDING TUNER OFF CD AUX TAPE 1 STEREO CONTROL AMPLIFIER RC-971 POWERPHONESBASSTREBLE OFF TONE ON 1 2378645 Figure 2:Output Connections Prises de sortie Anschlu einer Endstufe Collegamenti duscita Conexiones de Salida De verbindingen met de eindversterker SE

16、RIAL NO. 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 MINIMUM POWER AMPLIFIER

17、 MODEL NO. RB-981 POWER CONSUMPTION: 400W SERIAL NO. LEFT INPUTRIGHT INPUT ROTEL RB-981 TAPE 1 INOUT AUXCDTUNERTAPE 2 INOUT OUTPUTS 12 LEFT RIGHT CONTROL AMPLIFIER MODEL NO. RC-971 POWER CONSUMPTION: 10W AC 3.3A 400W MAX SWITCHED LEFT RIGHT ROTEL RC-971 STEREO CONTROL AMPLIFIER RC-971 RadioFans.CN 收

18、音机爱 好者资料库 4 SERIAL NO. CD PLAYER OUTPUT L R TAPE 1 INOUT AUXCDTUNERTAPE 2 INOUT OUTPUTS 12 LEFT RIGHT CONTROL AMPLIFIER MODEL NO. RC-971 POWER CONSUMPTION: 10W AC 3.3A 400W MAX SWITCHED LEFT RIGHT ROTEL RC-971 Figure 3:Line Level Input Connection Branchement des sources niveau Ligne Anschlu eines CD

19、-Players Collegamenti ingresso linea Conexiones de Nivel de Lnea De verbindingen met de lijnniveaubronnen Figure 4:Recorder Connections Branchements dun magntophone Anschlu eines Recorders Collegamenti registratore Conexin de Componentes de Grabacin De verbindingen met een opname/weergave apparaat S

20、ERIAL NO. RECORDER INPUT L R OUTPUT L R TAPE 1 INOUT AUXCDTUNERTAPE 2 INOUT OUTPUTS 12 LEFT RIGHT CONTROL AMPLIFIER MODEL NO. RC-971 POWER CONSUMPTION: 10W AC 3.3A 400W MAX SWITCHED LEFT RIGHT ROTEL RC-971 STEREO CONTROL AMPLIFIER RC-971 5 About Rotel A family whose passionate interest in music led

21、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 and music lovers, regardless of their budget, is shared by all Rotel

22、 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 product the best they can. You are likely to find capacitors from the Uni

23、ted 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 and awards from the most respected re- viewers in the industry, who

24、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 of enjoyment. Getting Started Thank you for purchasing the Rotel R

25、C-971 Stereo Control Ampli- fier. When used in a high-quality music audio system, it will pro- vide years of musical enjoyment. The RC-971 is a full featured, high performance preamplifier. All aspects of the design have been optimized to retain the full dy- namic range and subtle nuances of your mu

26、sic. The RC-971 has a highly regulated power supply incorporating a Rotel custom-de- signed power transformer. This low impedance power supply has ample power reserves, which enables the RC-971 to easily repro- duce the most demanding audio signals. This type of design is more expensive to manufactu

27、re, but it is better for the music. The RC-971 printed circuit boards (PCB) are designed with Sym- metrical Circuit Traces. This insures that the precise timing of the music is maintained and faithfully recreated. The RC-971 circuitry uses metal film resistors and polystyrene or polypropylene ca- pa

28、citors in important signal paths. All aspects of this design have been examined with the final goal being faithful reproduction of music. The RC-971 is straightforward in its installation and operation. If you have experience with other stereo systems, you shouldnt find anything perplexing. Simply p

29、lug in the associated components and enjoy. Contents (circled numbers refer to illustration) About Rotel _ 5 Getting Started _ 5 A Few Precautions6 Placement6 Cables6 AC Power and Control _ 6 AC Power Input 136 Power Switch 2 and Power Indicator 1 6 Auxiliary Power Outputs 126 Input Signal Connectio

30、ns 9 _ 7 Recorder Connections 10_ 7 Output Connections 11_ 7 Front Panel Controls _ 7 Volume Control 67 Tone On/Off Switch 57 Bass and Treble Controls 47 Listening Selector 88 Recording Selector 78 Phones Output 38 Troubleshooting _ 8 Power Indicator Is Not Lit8 Fuse Replacement8 No Sound8 Specifica

31、tions _ 30 English 6 A Few Precautions Please read this manual carefully. It provides complete informa- tion on how to incorporate the RC-971 into your system as well as general information that will help you get optimum sound perfor- mance. Please contact your authorized Rotel dealer for answers to

32、 any questions you might have. In addition, all of us at Rotel wel- come your questions and comments. Save the RC-971 shipping carton and all enclosed packing mate- rial for future use. Shipping or moving the RC-971 in anything other than the original packing material may result in severe damage to

33、your amplifier. Fill out and send in the owners registration card packed with the RC-971. 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 Like all audio components that hand

34、le low-level signals, the RC-971 can be affected by its environment. Do not stack the RC-971 on top of a power amplifier. This will minimize chance it will pick up hum or interference. We recommend installing the RC-971 in furniture designed to house audio components. Such furniture is designed to r

35、educe or suppress vibration which can adversely affect sound quality. Ask your authorized Rotel dealer for advice about component furniture and proper installation of audio components. Cables Be sure to keep the power cords, digital signal cables and regular audio signal cables in your installation

36、away from each other. This will minimize the chance of the regular audio signal cables pick- ing up noise or interference from the power cords or digital cables. Using only high quality, shielded cables will also help to prevent noise or interference from degrading the sound quality of your system.

37、If you have any questions see your authorized Rotel dealer for advice about the best cable to use with your system AC Power and Control AC Power Input 13 The RC-971 does not use a significant amount of power. However there are two auxiliary power outlets on the back of the unit, which can be used to

38、 supply power for other units. Consequently it is usually best to plug the RC-971 directly into a 2-pin polarized wall outlet. Avoid the use of extension cords. A heavy duty multi- tap power outlet strip may be used if it (and the wall outlet) is rated to handle the current demanded by the component

39、s con- nected to it. Note: Do not connect the power cord for a power amplifier to the auxiliary power outlets on the RC-971. Power amplifiers often draw more power than these outlets can provide. Your RC-971 is configured at the factory for the proper AC line voltage in the country where you purchas

40、ed 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 RC-971 amplifier to another country, it is possible to reconfigure your amplifier for use on a different line voltag

41、e. Do not attempt to perform this conversion yourself. Opening the enclosure of the RC-971 exposes you to dangerous voltages. Consult a qualified service person or the Rotel factory service department for information. If you are going to be away from home for an extended period of time such as a mon

42、th-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 2 and Power Indicator 1 The Power switch is located on the left side of the front panel. When it is pushed in the RC-971 is turned on and the Power

43、Indi- cator light is illuminated. Press the Power switch again to turn the RC-971 off. Auxiliary Power Outputs 12 (U.S.A. version) The RC-971 has two switched outlets on the back panel. Power is available from these outlets when the RC-971 is turned on. These outlets can provide up to a total of 400

44、 watts. They are appropri- ate for supplying power to signal sources, such as CD players, tuners, or tape decks. They should not be used for power amplifi- ers. Connecting components that will draw more than 400 watts to these outputs could damage the Standby switch in the RC-971. STEREO CONTROL AMP

45、LIFIER RC-971 7 Output Connections 11 See Figure 2 for RCA output connection illustration. The RC-971 has RCA-type output connectors that are compatible with the inputs of most power amplifiers. Use high quality cables and be sure to connect the Left and Right channel outputs of the RC-971 to the co

46、rrect channels of the amplifier. Note: There are two sets of outputs on the RC-971. The second set of outputs may be used in custom system configurations to drive a second power amplifier or to supply a signal to a special signal processor. Front Panel Controls Volume Control 6 The front panel Volum

47、e control is actually two separate controls. The control knobs are “friction connected”, so both controls nor- mally operate together. Turn the controls clockwise to increase the volume, or counterclockwise to decrease the volume. The two controls can be operated separately by holding one con- trol

48、knob while turning the other. Normally this is necessary only to compensate for problems in the program material. Tone On/Off Switch 5 When the switch is in the Off position the tone control circuits are bypassed to ensure the purest possible sound. Leave the switch in the Off position unless you want to use the tone controls. Turn the switch to the On position if you want to adjust the tone controls. Bass and Treble Controls 4 When the Tone Switch is in the On position, turning the Bass and Treble controls adjusts the tone balance of the sound. Turn the con