Hafler-9130-pwr-sm维修电路原理图.pdf

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1、H O M E A U D I O C O M P O N E N T S0 W N E R SM A N U A LSeries 09130P 0 W E RA M P L I F I E RRadioFans.CN 收音机爱 好者资料库Series 9130 Power AmplifierNOTICE-IMPORTANT SAFETY INFORMATIONAp!J!AWARNING: TO PREVENT FIRE ORSHOCK HAZARD, DO NOT EXPOSE THISEQUIPMENT TO RAIN OR MOISTURE.1.2 .3 .4 .5 .6 .VENTIL

2、ATION7 .8 .POWER SOURCES9 .10.The lightning flash with arrowhead symbol withinan equilateral triangle is intended to alert theuser to the presence of uninsulated “dangerousvoltage” within the products enclosure, that maybe of sufficient magnitude to constitute a risk ofelectric shock to persons.The

3、exclamation point within an equilateraltriangle is intended to alert the user of thepresence of important operating and mainte-nance (servicing) instructions in the literatureaccompanying the appliance.READ INSTRUCTIONSAll the safety and operating instructions of your Hafler equipment should be read

4、 before power is applied to theequipment.RETAIN OWNERS MANUALThese safety and operating instructions should be retained for future reference.HEED WARNINGSAll warnings on the equipment and in the operating instructions are important and should be followed.FOLLOW INSTRUCTIONSAll operating and use inst

5、ructions are important and should be followed.HEATThe equipment should be kept away from areas of high temperature, such as heater vents, radiators, stoves/ovens,fireplaces, etc.The equipment should be used in an area suitable for proper ventilation. Care should be taken not to impede airflowin and

6、around the cabinet. Do not mount on a carpeted shelf or in a sealed enclosure. Allow for proper clearance abovethe equipment.WATER AND MOISTUREThe equipment should not be used in or around water, such as a bathtub, sink, or swimming area. Also, the equipmentshould not be used in areas prone to flood

7、ing, such as a basement.The equipment should be connected only to a power source of the same voltage and frequency as that listed on therear panel above the power cord entry point.POWER CORD PROTECTIONPower cords should be arranged so that they do not interfere with the movement of objects in the ro

8、om: people, fanblades, utility carts, etc. Also, care should be taken that the cord is not pinched or cut, and placed so that it is not indanger of being pinched or cut, as in under a rug, around a tight corner, etc.POWER CORD GROUNDINGThe power supply cord is of a three wire grounded type, designed

9、 to reduce the risk of electric shock sustained froma live cabinet. It is assumed to be of suitable length for most uses of the equipment. The use of extension cords andpower strips is discouraged unless they are of suitable rating to deliver the required total current for safe operation ofall conne

10、cted equipment. Furthermore, extension cords or power strips must provide the same three wire groundedconnection.It is important that the blades of the equipments plug be able to fully insert into the mating receptacle.Never remove the round grounding pin on the plug in an attempt to mate to a two w

11、ire ungrounded receptacle: usea grounding adaptor with the grounding tab or wire suitably connected to earth ground.-l-RadioFans.CN 收音机爱 好者资料库11.NON-USE PERIODSDuring periods of extended non-use, the power cord should be unplugged from the power source.12.CLEANINGThe equipment should be cleaned only

12、 as detailed in the operating instructions.13.OBJECT AND LIQUID ENTRYCare should be taken so that objects and/or liquids, such as cleaning fluids or beverages, are not spilled into theenclosure of the equipment.14.DAMAGE REQUIRING SERVICEHafler equipment should be serviced by qualified service perso

13、nnel when:A.The power supply cord or plug has been damaged, orB .Objects have fallen, or liquid has been spilled into the equipment, orC.The equipment has been exposed to rain, orD.The equipment does not appear to operate normally or exhibits a marked change in performance, orE .The equipment has be

14、en dropped, or the enclosure has been damaged.15.SERVICINGThe user should not attempt to service the equipment beyond that which is described in the operating instructions.All other service should be referred to qualified service personnel.16.CARTS AND STANDSThe equipment should be used with carts o

15、r stands only of sufficient strength and stability for the use intended.An equipment and cart combination should be moved with care. Quick stops and starts, excessive force, anduneven surfaces may cause the equipment and cart combination to topple.-2-TABLE OF CONTENTSPERFORMANCE SPECIFICATIONS . 4Ge

16、neral Information . 4INSTALLATIONRackmounting . 5Ventilation/Placement . 5Line Voltage.5OPERATION/CONNECTIONSPower Cord Connection/Power Switch . 5Inputs .5Front Panel View Diagram . 6Rear Panel View Diagram . 7Outputs.8GainControls.8Mono/Stereo Switching . 8Soft Turn-On System . 8Thermal Protection

17、 System . 8CIRCUIT HIGHLIGHTS . 9ADDITIONAL INFORMATIONLoudspeaker Load Impedance Considerations . 9Changing Line Voltage Rating.10AdjustingBias .10General Troubleshooting Hints . 11Ground Loops . 11Cleaning/Maintenance . 12Functional Block Diagram . 13Parts List .14Component Layout Diagram . 15Circ

18、uit Schematic Diagram.17SERVICE POLICY AND LIMITED WARRANTY.19-3-PERFORMANCE SPECIFICATIONSGENERALINFORMATIONAll specifications are for 20 Hz - 20 kHz, at full power into 8 ohms, unless specified otherwise.Power Rating:Rated THD:Full Power Bandwidth:Signal to Noise Ratio:Input Impedance:Input Sensit

19、ivity:Damping Factor:Controls:Inputs:outputs:Power Consumption:Size:Weight:65 watts per channel (8 ohms)less than 0.008%4 Hz to 40 kHzgreater than 100 dB, unweighted22,000 ohms1.1 volts RMS100 to 1 kHz, 50 to 10 kHzPower Switch, Left/Right Gain Controls, Mono/Stereo SwitchRight and Left/Mono RCA jac

20、ksRight, Left, and Mono 5-way Binding Posts40 watts quiescent, 600 watts maximum17”(W) x 9”(D) x 3.5”(H) excluding feet, faceplate 17” or 19”(W)43.2cm(W) x 22.8cm(D) x 8.9cm(H) excluding feet,faceplate 43.2cm or 48.3cm(W)20 Ibs., 9 kg, net.-4-INSTALLATIONRACKMOUNTINGVENTILATION/PLACEMENTLINE VOLTAGE

21、The 9130 Amplifier is supplied in either a 17” Black Version, or a 19” Silver Version. The 19” modelhas rackmounting holes provided for installation in equipment racks. The holes are on standard EIAspacings.Due to conflict with adjacent equipment, it may be advisable to remove the four rubber feetfr

22、om the bottom of the unit. The feet may be removed from the outside, with no dis-assembly of thechassis necessary.The 9130 Amplifier can produce considerable heat during normal operation. The amplifier should beplaced on a hard, smooth surface to allow air to circulate beneath the unit. Additionally

23、, allow at leastone inch of free space on either side, and several inches above and behind the amplifier to allow aircirculation around the heatsinks. This is particularly important when the unit is installed in a closedcabinet.In applications where the amplifier is driving low impedance and/or low

24、efficiency loudspeakers at highlevels, thermal shutdown may occur if inadequate ventilation is provided. If this occurs, it may benecessary to move the amplifier to a location with better free air circulation.The amplifier should be located at least several inches away from sensitive components, (su

25、ch aspreamplifiers, tuners, CD players, turntables, etc.) due to the possibility of audible hum or buzz frommagnetic radiation.The 9130 Amplifier is configurable for either 100, 120, or 230 volt operation. This is accomplished bymoving the Voltage Selector on the printed circuit board. The procedure

26、 is detailed in the section“CHANGING LINE VOLTAGE RATING”.Make sure that the unit is configured for your local AC line voltage before attempted use. Theconfiguration is labelled directly above the power cord connector. (Units wired for 230VAC may be usedover a range of 220 to 240VAC.)OPERATION/CONNE

27、CTIONSPOWER CORDCONNECTION/POWER SWITCHINPUTSUnits wired for 100 and 230 VAC are supplied without power cords. Local agents will supply cords withmale connectors appropriate to the local standard.Units wired for 120 VAC are supplied with a detachable AC power cord. The female connector plugsinto the

28、 receptacle provided on the rear panel. This power cord is a standard IEC Type 320, 3-wire,16 gauge assembly. Should replacement ever be necessary, be sure to replace it with an identical cord.Never remove the grounding pin from the male end of the cord. In applications where a grounded outletis not

29、 available, a ground adaptor should be employed, with the ground tab or wire of the adaptorconnected to a suitable earth ground.The AC power cord of the amplifier must be connected to a receptacle capable of delivering a minimumof 600 watts. The convenience outlets of some preamplifiers are not rate

30、d for this power level. Beforeconnecting the amplifier, be sure to check the rating of such outlets, and take into account the powerconsumption of any other connected components to determine the total maximum power consumption.If the amplifier is connected to a component with a switched convenience

31、outlet, then the amplifiersPower Switch may be left ON at all times, and the power controlled by the switched outlet. If the amplifieris connected to an unswitched outlet, then the amplifiers power should be controlled by the front panelPower Switch.All input connections to the amplifier must be per

32、formed with the amplifier off!The left and right audio inputs to the amplifier are via standard RCA jacks. Connect these jacks to theoutput of the preamplifier or other signal source.When operating the amplifier in the Mono Mode, only the left channel input should be used.-5-LEFT/MONOGAINPOWER SWITC

33、HUP - ONDOWN- O F FI(3,IRACKMOUNT HOLESRIGHT(19” VERSION ONLY)GAIN9130 AMPLIFIER FRONT PANEL VIEW-7-OUTPUTSAll output connections to the amplifier must be performed with the amplifier off!GAINCONTROLSMONO/STEREOSWITCHINGSOFT TURN-ON/OFFSYSTEMTHERMALPROTECTIONSYSTEMThe left and right audio outputs fr

34、om the amplifier are via standard 5-way type, 3/4” spacing, bindingposts. Connect these binding posts to the loudspeakers. The amplifiers binding posts will acceptsingle or dual banana plugs, spade lugs, pin plugs, or bare wires. If using bare wires, it is recommendedthat the ends of the wire be tin

35、ned with solder so that no stray strands can cause a short circuit to thechassis or adjacent terminals.To ensure proper speaker phasing and frequency response, be sure to connect each respectiveamplifier RED (+) terminal to the speaker RED (+) terminal, and the amplifier BLACK (-) terminal to thespe

36、aker BLACK (-) terminal. The polarity symbols (+/-) for Stereo Mode are labelled directly abovethe amplifiers binding posts.For operation in the Mono Mode, a single loudspeaker should be connected to the two RED bindingposts only. No connection is made to the amplifiers BLACK binding posts. Connect

37、the speakers RED(+) terminal to the amplifiers RED terminal labelled (+), and the speakers BLACK (-) terminal to theamplifiers RED terminal labelled (-). The polarity symbols (+/-) for the Mono Mode are labelled abovethe polarity markings for the Stereo Mode.The 9130 Amplifier is equipped with front

38、 panel mounted Gain Controls. These controls may be usedto attenuate the input signal to the amplifier. The maximum clockwise position of these controls appliesthe full input signal to the amplifier. Intermediate positions of these controls will partially attenuate thesignal, and the full counter-cl

39、ockwise position attenuates the input signal completely.Most applications will dictate that these controls be set to their maximum clockwise position. Insituations of unusually high level signal sources, or for matching levels in multiple amplifier installa-tions, it may be desirable to use an inter

40、mediate position of the Gain Controls. Unless intentionallyintroducing different gain levels in the two channels of the amplifier, these controls should normally beset at the same rotational position.In the Mono Mode, the Left Gain Control affects the overall gain of the amplifier. The Right Gain Co

41、ntrolhas no effect.The 9130 Amplifier may be operated in the normal two channel Stereo Mode, or may be converted(bridged) to a higher power, single channel amplifier in the Mono Mode.Operation of the Stereo/Mono switch must be performed with the amplifier off! Set the Stereo/MonoSwitch in the OUT po

42、sition for Stereo Mode, or in the IN position for Mono Mode. Mono Mode operationrequires different input and output connections: consult the sections of the manual titled “Inputs” and“Outputs”.The 9130 Amplifier is equipped with a Soft Turn-On/Off System that gradually activates the amplifierscircui

43、try to avoid spurious noises as the power supply stabilizes.At turn-off, this same system rapidly deactivates the amplifiers circuitry before the power supply beginsto collapse, again eliminating any spurious noises.The 9130 Amplifier is equipped with a Thermal Protection System that constantly moni

44、tors thetemperature of the heatsinks. When the heatsink temperature reaches a pre-determined level, theamplifiers circuitry is electronically shut down through the same system that provides the Soft Turn-On function. When the heatsinks cool to a safe operating temperature, normal operation of theamp

45、lifier resumes.-8-CIRCUIT HIGHLIGHTSThe 9130 employs a single ended, current source driven, differential input stage. This stage isconnected to the rest of the circuitry through a balanced push-pull current mirror system. A combinationcurrent mirror and bias multiplier drive the final output stage d

46、river emitter followers.Special linearizingtechniques are used that dramatically reduce harmonic distortion.The final output stage uses two multiple lateral MOSFETs (Metal Oxide Semiconductor Field EffectTransistors) per channel. These devices, unlike conventional bipolar transistors, have a negativ

47、etemperature coefficient, which means that they do not exhibit “thermal runaway”. Thermal runaway isa phenomenon whereby a transistor heats up as it conducts more current, which causes it to get hotter,and conduct more current, and so on, until the device self destructs. Since MOSFETs are inherently

48、self-protecting, no sonically degrading, complex circuitry is required to monitor and protect the outputdevices.Furthermore, these lateral MOSFETs exhibit a very linear input to output transfer function. Theirconnection in circuits and operating characteristics are very similar to vacuum tubes, whic

49、h is perhapsresponsible for their widely recognized sonic trait of being very “musical” and non-fatiguing.Conversion to Mono Mode is accomplished by driving the negative input (feedback point) of the rightchannel with the output of the left channel. This causes the right channel to mirror exactly th

50、e outputof the left channel, but 180 degrees out of phase. This creates twice the voltage swing to be availableacross the two red output binding posts. This simple method of bridging the amplifier (involving onlyone resistor) eliminates the costly and sonically degrading inverter circuitry used in o