Rotel-RA-972-OM 电路图 维修手册.pdf

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1、Owners Manual Manuel dutilisation Bedienungsanleitung Manuale di Istruzioni Manual de Instrucciones Gebruiksaanwijzing RA-972 Stereo Integrated Amplifier Amplificateur Intgr Strophonique Stereo-Vollverstrker Amplificatore Integrato Estereofonico Amplificador Integrado Estereofnico Gentegreerde Stere

2、o Versterker STEREO INTEGRATED AMPLIFIER RA-972 BASS TONE OFF A B A+B ONOFF VOLUME RECORDINGLISTENING TAPE 1 TUNER OFF CD AUX 1 AUX 2 TAPE 2 TAPE 1 CDTUNER AUX 1 AUX 2 TREBLE SPEAKERS PHONES REMOTE SENSOR POWER RadioFans.CN 收音机爱 好者资料库 2RA-972 Stereo Integrated Amplifier WARNING: There are no user se

3、rviceable parts inside. Re- fer all servicing to qualified service personnel. WARNING: To reduce the risk of fire or electric shock, do not expose the unit to moisture or water. Do not allow for- eign objects to get into the enclosure. If the unit is exposed to moisture, or a foreign object gets int

4、o the enclosure, im- mediately disconnect the power cord from the wall. Take the unit to a qualified service person for inspection and nec- essary repairs. Read all the instructions before connecting or operating the component. Keep this manual so you can refer to these safety instructions. Heed all

5、 warnings and safety information in these instructions and on the product itself. Follow all operating instructions. Clean the enclosure only with a dry cloth or a vacuum cleaner. You must allow 10 cm or 4 inches of unobstructed clearance around the unit. Do not place the unit on a bed, sofa, rug, o

6、r similar surface that could block the ventilation slots. If the component is placed in a bookcase or cabinet, there must be ventilation of the cabinet to allow proper cooling. Keep the component away from radiators, heat registers, stoves, or any other appliance that produces heat. The unit must be

7、 connected to a power supply only of the type and volt- age specified on the rear panel of the unit. Connect the component to the power outlet only with the supplied power supply cable or an exact equivalent. Do not modify the supplied cable in any way. Do not attempt to defeat grounding and/or pola

8、rization provi- sions. 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 power cord at the plug and where it exits the back of the unit. The power cord should be un

9、plugged from the wall outlet if the unit is to be left unused for a long period of time. Immediately stop using the component and have it inspected and/or ser- viced by a qualified service agency if: The power supply cord or plug has been damaged. Objects have fallen or liquid has been spilled into

10、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 not place it on a moveable cart that could tip over. RadioFans.CN 收音机爱 好者资料库 3 Figu

11、re 1:Controls and Connections Commandes et branchements Bedienelemente und Anschlsse Controlli e collegamenti Controles y Conexiones De bedieningsorganen en de aansluitingen English RadioFans.CN 收音机爱 好者资料库 4 Figure 2:Line Level Signal, Recorder and Speaker Output Connection Signal dentre Ligne, denr

12、egistreur et sorties enceintes acoustiques Signaleingang und Anschlu eines Lautsprecherpaares Collegamenti dei segnali linea in ingresso, del registratore, dei diffusori Conexiones para Entrada de Seal y Salida a las Cajas Acsticas De aansluiten van de lijnbronnen, een opname/weergaveapparaat en de

13、luidsprekers CDTUNERAUX 1AUX 2 SPEAKER IMPEDANCE MINIMUM A OR B 4 OHMS PER SPEAKER A AND B 8 OHMS PER SPEAKER WARNING: TO AVOID THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CD PLAYER RECORDER R L OUTPUT R L INPUT R L OUTPUT SPEAKERS LEFT RIGHT INTEGRATED AMPL

14、IFIER MODEL NO. RA-972 POWER CONSUMPTION: 300W LEFTRIGHT SPEAKER ASPEAKER B TAPE 1TAPE 2PREOUT OUTINOUTIN LEFTRIGHT CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 12V TRIG. OUT ROTEL RA-972 SWITCHED 400W MAX. RA-972 Stereo Integrated Amplifier 5 Contents About Rotel . 5 Getting Started . 5 The RR-AT92 R

15、emote Control . 6 Remote Sensor 6 A Few Precautions6 Placement6 Cables6 AC Power and Control . 6 AC Power Input 6 Power Indicator and Power Control 6 Auxiliary Power Outputs (U.S.A. version)7 12 Volt Trigger Outlet 7 Input Signal Connections . 7 Recorder Connections 7 Preamp Outputs 7 Speaker Output

16、s . 7 Speaker Selector Switch . 7 Speaker Selection7 Speaker Wire Selection7 Polarity and Phasing7 Speaker Connection7 Phones Output . 8 Audio Controls . 8 Volume Control 8 Tone On/Off Switch 8 Bass and Treble Controls 8 Listening Selector 8 Recording Selector 8 Remote Control Functions . 8 Mute Con

17、trol 8 Power On/Off 8 Troubleshooting. 9 Power Indicator Is Not Lit9 Fuse Replacement9 No Sound9 Specifications . 9 About Rotel A family whose passionate interest in music led them to manufacture high fidelity components of uncompromising quality founded Rotel 40 years ago. Through the years that pa

18、ssion has remained 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, listen- ing to, and fine tuning each new product until it reaches their exacting musi

19、cal standards. 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 ca- pacitors from the United Kingdom and Ger- many, semi conductors from Japan or the United States, while toroidal power transform- ers are manufactured in

20、 Rotels own factory. Rotels reputation for excellence has been earned through hundreds of good reviews and awards from the most respected reviewers in the industry, who listen to music every day. Their comments keep the company true to its goal the pursuit of equipment that is musi- cal, reliable an

21、d 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 RA-972 Stereo Integrated Amplifier. When used in a high-quality music audio system, it will pro- vide years of musical enjoyment.

22、The RA-972 is a full featured, high perfor- mance component. All aspects of the design have been optimized to retain the full dynamic range and subtle nuances of your music. The RA-972 has a highly regulated power sup- ply incorporating a Rotel custom-designed to- roidal power transformer and custom

23、-made slit foil capacitors. This low impedance power supply has ample power reserves, which enables the RA-972 to easily reproduce the most demanding audio signals. This type of design is more expensive to manufacture, but it is better for the music. The printed circuit boards (PCB) are designed wit

24、h Symmetrical Circuit Traces. This insures that the precise timing of the music is main- tained and faithfully recreated. The RA-972 circuitry uses metal film resistors and poly- styrene or polypropylene capacitors in impor- tant signal paths. All aspects of this design have been examined to ensure

25、the most faithful music reproduction. In addition the RA-972 has independent in- put signal selectors for listening and record- ing. They allow you to listen to one signal source while recording another. The main functions of the RA-972 are easy to install and use. If you have experience with other

26、stereo systems, you shouldnt find any- thing perplexing. Simply plug in the associ- ated components and enjoy. English 6RA-972 Stereo Integrated Amplifier The RR-AT92 Remote Control Some functions can be done with either the front panel controls, or the supplied RR-AT92 remote control. When these op

27、erations are described, the call out number for both con- trols is shown. For example, you can select the source you want to listen to with either the front panel Listening Selector or the re- mote control buttons . Remote Sensor The Remote Sensor picks up the infrared sig- nals from the remote cont

28、rol. Do not cover or block the sensor. It must be unobstructed or the remote control will not work properly. The operation of the Remote Sensor can also be affected if it is exposed to bright light, par- ticularly sunlight. Certain types of lighting, such as halogen lights, that emit a fair amount o

29、f infrared light, can also interfere with proper operation. In addition remote control functions may not work reliably if the batteries in the RR-AT92 are weak. Note: Remove the batteries from the re- mote control if it will not be used for a long period of time. Do not leave run down bat- teries in

30、 the remote control. Exhausted bat- teries can leak corrosive chemicals which will damage the unit. A Few Precautions WARNING: To avoid potential damage to your system, turn off ALL the components in the system when connecting or discon- necting the loudspeakers or any associated components. Do not

31、turn the system com- ponents back on until you are sure all the connections are correct and secure. Pay particular attention to the speaker wires. There must be no loose strands that could contact the other speaker wires, or the chassis of the amplifier. Please read this manual carefully. It provide

32、s information on how to incorporate the RA-972 into your system as well as information that will help you get optimum sound performance. Please contact your authorized Rotel dealer for answers to any questions you might have. In addition, all of us at Rotel welcome your questions and comments. Save

33、the RA-972 shipping carton and all en- closed packing material for future use. Ship- ping or moving the RA-972 in anything other than the original packing material may re- sult in severe damage to your amplifier. Fill out and send in the owners registration card packed with the RA-972. Also be sure

34、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 handle low- level signals, the RA-972 can be affected by its environment. Avoid placing the RA-972 on top o

35、f other components. Also avoid routing audio signal cables near power cords. This will minimize the chance it will pick up hum or interference. The RA-972 generates heat as part of its normal operation. The heat sinks and venti- lation openings in the amplifier are designed to dissipate this heat. T

36、he ventilation slots in the top cover must be open. There should be 10 cm (4 inches) of clearance around the chassis, and reasonable airflow through the installation location, to prevent the amplifier from overheating. Remember the weight of the amplifier when you select an installation location. Ma

37、ke sure that the shelf or cabinet can support it. We recommend installing the RA-972 in furniture designed to house audio components. Such furniture is designed to reduce or suppress vibration which can adversely affect sound quality. Ask your authorized Rotel dealer for advice about component furni

38、ture and proper installation of audio components. Cables Be sure to keep the power cords, digital sig- nal cables and regular audio signal cables in your installation away from each other. This will minimize the chance of the regular au- dio signal cables picking up noise or inter- ference from the

39、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. If you have any questions see your authorized Rotel dealer for advice about the best cable to use with your system. AC Power and Co

40、ntrol AC Power Input Because of its relatively high power rating, the RA-972 can draw considerable 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 it (and the wall outlet) is

41、rated to handle the current demanded by the RA-972 and all the other components con- nected to it. Your RA-972 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 A

42、C line configuration is noted on a decal on the back panel. Note: Should you move your RA-972 am- plifier to another country, it is possible to reconfigure it for use on a different line voltage. Do not attempt to perform this conversion yourself. Opening the enclosure of the RA-972 exposes you to d

43、angerous 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 month- long vacation, it is a sensible precaution to unplug your amplifier (as well as other au- dio and video

44、 components) while you are away. Power Indicator and Power Control Press the front panel Power Switch button, to turn the RA-972 on. The Power Indicator light is illuminated when the RA-972 is on. Press Power button again to turn the RA-972 off. Once the RA-972 has been turned on with the front pane

45、l power switch, it can be switched between normal operating mode and standby mode with the Power button on the RR-AT92 remote control. See page 8 for more information 7 Auxiliary Power Outputs (U.S.A. version) The RA-972 has a switched outlet on the back panel. Power is available from this outlet wh

46、en the RA-972 is turned on. The outlet can pro- vide up to 400 watts. It is appropriate for sup- plying power to a signal source, such as a CD player, tuner, or tape deck. It should not be used for power amplifiers. Connecting a component that will draw more than 400 watts from this output could dam

47、age the Power Standby switch in the RA-972. 12 Volt Trigger Outlet Some audio components can be turned on automatically when they receive a 12V turn on “signal”. The 12V Trigger Output of RA-972 provides the required signal. Connect the com- patible components to the RA-972 with a conventional 1/8”

48、miniplug cable. Input Signal Connections See Figure 2 for input connection il- lustration. The RA-972 has conventional RCA type in- put connectors, the type found on nearly all audio equipment. Note: To prevent loud noises that neither you nor your speakers will appreciate, make sure the system is turned off when you make any signal connections. All the inputs of the RA-972 are “line level inputs. These are appropriate for connecting components such as CD players, Hi Fi or NICAM Stereo video cassette recorders, tuners for au