HarmanKardon-HK670-rec-sm1维修电路原理图.pdf

HK670 Integrated Amplifier PRELIMINARY Service Technical Manual Harman International SNC - Harman Consumer International 2, route de Tours 72500 Chteau du Loir FRANCE RadioFans.CN 收音机爱 好者资料库INTRODUCTION 3IntroductionCongratulations on your choice of theHarmanKardon HK670 Integrated Amplifier.In order to obtain the best performance fromthis integrated amplifier, please be sure to readthis owners manual and use your integratedamplifier only in accordance with its instructions.The special features of this unit include:HCC (High Instantaneous Current Capability)The amplifier sections react rapidly to musicaltransients, providing the instantaneous currentnecessary to precisely drive and control nearlyany loudspeaker system.Ultrawide BandwidthThe bandwidth of this unit is exceptionally wideand is independent of negative feedback.Thisimproves transient accuracy and phase linearity.Low Negative FeedbackThis unit has been designed to have low distor-tion and wide bandwidth without high negativefeedback.This further improves its dynamicaccuracy.Discrete Component CircuitryIn order to achieve the above goals, all discreteelectronic circuitry has been employed. No avail-able integrated circuits could provide this highlevel of performance.Sophisticated Electronic Protection CircuitryHarmanKardons unique protection circuitryguards the amplifier from short circuit or dam-aged speakers and wires, without impairingsound quality by the use of current limiting oroutput relays.General instructionsAlways Use at 230V ACThis unit is designed for operation with 230VAC. Use only domestic AC outlets. Connectingthe unit to an outlet supplying a higher voltagemay create a fire hazard.Handle the Power Cord GentlyDo not disconnect the plug from the AC outletby pulling the cord; always pull the plug itself.Pulling the cord may damage it. If you do notintend to use your unit for any considerablelength of time, turn the unit off completely bypressing the round Power button above “Power”(see page 5). Do not place furniture or otherheavy objects on the cord, and try to avoid drop-ping heavy objects on it.Also do not tie a knotin the power cord. Not only may the cord bedamaged, it can also cause a short circuit with aconsequent fire hazard.Place of installationPlace the unit on a firm and level surface.Avoidinstalling your unit under the following condi-tions:I Moist or humid places.I Places exposed to direct sunlight orclose to heating equipment.I Extremely cold locations.I Places subject to excessive vibration or dust.I Poorly ventilated places.Do not obstruct the ventilation slots on the topsurface of the unit by placing objects on them.Otherwise, the temperature inside the unit mayrise, possibly affecting its long-term reliability.Moving the UnitBefore moving the unit, be sure to pull out thepower cord from the AC outlet and disconnectthe interconnection cords with other units.Do Not Open the CabinetTo prevent shock hazard, do not tamper withinternal components for inspection or mainte-nance. HarmanKardon does not guaranteeagainst performance degradation resulting fromany modification. If water, a hairpin or wire acci-dentally enters the unit, immediately pull theplug from the AC outlet to prevent shock andconsult an authorized HarmanKardon servicestation. If you use the unit under this condition,it may cause a fire shock hazard.CleaningIf the unit gets dirty, wipe it with a soft dry cloth.If necessary, wipe it with a soft cloth dampenedwith mild soapy water and then with a dry cloth.Never use benzene, thinner, alcohol or othervolatile agents, and avoid spraying an insecticidenear the unit.Warning SignsIf you detect an abnormal smell or smoke, imme-diately turn the amplifier off and unplug thepower cord. Contact your dealer or nearestHarmanKardon service center.PackagingSave all packing material. It is essential for ship-ping, should you move, or in the event the unitever needs repair.RadioFans.CN 收音机爱 好者资料库4CONNECTIONSConnectionsConnecting Other Components1.Make sure your amplifier and other compo-nents are turned off.2.Connect each components Output/Play jacksto the corresponding Input jacks on the backof your amplifier and, if available, the compo-nents Input/Record jacks to the Output jacksof the HK670. Use the white, black or grayplugs to connect Left channel jacks; use thered plugs for Right channel jacks.3.A record player with MM cartridge must beconnected to the Phono Input jacks and aseparate ground wire to the ground terminalscrew above.Wired Remote ControlTo control your amplifier with an externalinfrared remote sensor, connect the wire fromthe remote sensor to the REMOTE IN jack on theback panel. Or, if another stereo component hasa built-in infrared remote sensor and a RemoteOutput jack, it may be possible to connect this jack to the REMOTE IN jack of your amplifier.AllHarmanKardon products with Remote In andRemote Out jacks are compatible with oneanother, except for the Citation 22, 24 and 25.Other manufacturers remote sensors and com-ponents may not be compatible, but it will nothurt to experiment.A second wire may be usedto connect your amplifiers REMOTE OUT jack tothe Remote Input of another stereo component.Continue this process to include additional com-ponents (if compatible).Connecting Speakers1.For best performance, use high quality speak-er cables. However, ordinary copper wire canbe used if the gauge meets the followingrequirements:Wire Min.LengthDiameterUp to 2.5 meter1 mmUp to 4 meter1.25 mmUp to 6 meter1.6 mmAbove 6 meter2-2.5 mm2.Avoid rolling excess wire with or near signalinterconnects.IMPORTANT:When connecting two pairs ofspeakers, determine the impedance of each pairby looking on the back of the speakers, in yourowners manual, or by contacting your dealer ormanufacturer.You can listen to two pairs of speakers atthe same time ONLY if the impedance ofEACH speaker is NOT LESS THAN 8 Ohms.WARNING: Do not play sets of speakers simul-taneously except as recommended above.Ampli-fier may overheat.Digital Loop-ThroughDigital inputs and outputs are provided only as aconvenience for connecting various digital com-ponents to the “CD”,“CDR” and “AUX” digitalinputs.The corresponding digital input signal isfed to the “DIGITAL OUT” connector when“CD”,“CDR” or “AUX” is selected as inputsource, to provide a digital signal for CD or MDRecorders.The HK670 cannot process, decode orconvert any digital signal.AC PowerPlug the cord into a 230 VAC wall socket.Record PlayerCassette Tape DeckSpeaker System 1Left channelCompact Disc PlayerCD RecorderSpeaker System 1Right channelVideo Player 2Right channelSpeaker System 2Left channelSpeaker System 2Video Player 1TunerCONTROLS AND FUNCTIONS 5Controls and FunctionsPower switchesPress the round Power button (above “Power”)to turn the amplifier on for the first time.Thestatus LED behind the flat “Power” button willturn orange. Once the unit has been turned onwith the round power button, this button shouldbe left on for normal use and only turned offwhen the amplifier will not be used for extendedperiods of time (vacation, etc.). For daily use,press the flat “Power” button to turn the ampli-fier on or off (Standby). In Standby the LED willglow orange, indicating that the unit is still con-nected to AC mains and can be turned on fromthe remote control or with the flat “Power” but-ton.Headphone JackPlug in headphones if desired.With both“Speaker 1” and “2” selectors in the Off posi-tion, output is supplied only to headphones.Speaker 1/2 SelectorsPress to select speaker pair 1 or 2, or both, orneither (headphone output only).Input Source SelectorSelect desired input source for listening by press-ing the “Input Source”button repeatedly (on theleft will select upwards,right downwards) untilthe indicator for the desired source is illuminated.Record Source SelectorSelect desired source for recording to deviceconnected to the rear panel Tape and CDR Outsockets by pressing the “Record Source”buttonrepeatedly until the indicator for the desiredsource is illuminated.Bass ControlTurn to increase or decrease the amount of lowfrequency sound.Treble ControlTurn to increase or decrease the amount of highfrequency sound.Balance ControlTurn to adjust relative output level of left andright speakers.Volume ControlTurn to raise or lower output volume.Source DirectPress to bypass tone control circuitry.HK 670HK 670Indicates sourceselected for listening.Indicates sourceselected for recording.LED Power Mode indicationRed= ProtectionOrange= StandbyGreen = ONSource Direct indicatorlights up when “SourceDirect” button has beenpressed to bypass bassand treble controls.Speaker 1 and 2indicators light upwhen the correspon-ding speaker pairshave been selected.6REMOTE CONTROLRemote ControlIndependent Remote ControlThe system remote of the HK670 can control theamplifier and compatible Tuners,CD Players andCD Recorders.The remote In jack of units withoutan integrated IR receiver must be connected tothe amplifiers remote control output jack so thatthe system remote control can operate them.The Function Table below will show all functionsof the HK670 and external devices that can becontrolled by the HK670 remote.Important Notes: For controlling a tuner (only needed for thenumeric buttons), CD Recorder or CD Playerthe appropriate input (TUNER, CDR orCD) must have been selected with thesource buttons of the remote control (selectingon the front panel is not sufficient). Note that DVD players or tape decks cannotbe controlled by the remote. To control a compatible CD Recorder CDRmust be selected as input and the drive to becontrolled (CDP or CDR) must be selectedappropriately with the CDP SELECT or CDRSELECT buttons.Operating ConditionsThe control unit operates effectively within a dis-tance of 7 meters and an angle of 30 from theamplifier. Using the control near fluorescentlights may shorten this range, as will any dust ordirt that accumulates on the front of the remotecontrol or the remote sensor area of the amplifi-er.Also avoid blocking the line of sight betweenamplifier and remote.The control unit is powered by two AA batteries,included with your amplifier.When you replaceweak batteries, replace both at the same time.When the remote is to be unused for an extend-ed period, remove the batteries to prevent dam-age from corrosion.321456CDROFFTVCD9870AUXCDRTUNERSELECTRDSCDPPHONOTAPETUNERVOLUMEPOWERHK 670CD / CDRButtonHK670CD PlayerCD Recorder TunerPOWER/OFFPower On/Off-II(Fast Forward)-Fast ForwardFast Forward-HH(Fast Reverse)-Fast ReverseFast Reverse-JH(Skip Reverse)-Skip ReverseSkip Reverse-IK(Skip Forward)-Skip ForwardSkip Forward-A (Stop)-StopStop-I(Play)-PlayPlay-0 9 (Numeric Buttons)-Track SelectTrack SelectPreset SelectCDSource Select-CDRSource Select-AUXSource Select-TVSource Select-TUNERSource Select-PHONOSource Select-TAPESource Select-CDP SELECT-CDP Drive Select 1)-CDR SELECT-CDR Drive Select 1)-RDS-RDS Display SelectTUNERD-Tuning UpTUNERE-Tuning DownVOLUMEDVolume Up-VOLUMEEVolume Down-1)Only needed with CD RecordersRemote button functionsOPERATING INSTRUCTIONS 7Operating InstructionsListening to your CD player, tapedeck, tuner or other source1.Turn Volume control to minimum level andpress the round Power button (above”Power”) to turn the unit to Standby, thepower indicator below will light orange.Thenpress the flat Power switch to turn on theamplifier.The power indicator lights red for afew seconds, while the protection circuitrychecks for short circuit or other problems, andthen it lights green.2.Press “Speaker 1” to hear loudspeakers con-nected to the rear Speakers 1 terminals. Press“Speaker 2” to hear loudspeakers connectedto the rear Speakers 2 terminals. Press both tohear both speaker pairs at once.To listen toheadphones only, press to turn off any activespeaker pair.3.Select desired source for listening by pressingthe front panel Source button repeatedly untilthe indicator for the desired source is illumi-nated or by pressing the desired Source but-ton on the remote.4.Begin playing the desired source.5.Adjust the Volume control to the desired level.6.Adjust Bass,Treble and Balance controls asdesired (the Source Direct function must beturned off).7.Press Source Direct until the SourceDirect indicator lights up to bypass the tonecontrol and balance circuitry to ensure purestsound performance. Press again to turn thebypass function off and to make the tone andbalance controls function again.Making a recordingYou may record any source to tape or to CD-R orto both simultaneously.You may also connect asecond tape deck to the CDR inputs and outputsto record from tape to tape (in either direction).To select the desired source for recording (thiscan be a different source than the one beinglistened to), press the Record Source buttonon the front panel repeatedly until the indicatorfor the desired record source is illuminated.NOTE:The record output signal is taken directlyfrom the program source and is unaffected bythe Volume, Bass,Treble or Balance controls.Important Notes: The functions Source Direct and RecordSource can be selected on the front panelonly, not from the remote control. 3-head cassette decks with monitoring func-tion can be connected to Tape or CDRconnectors too, but their monitoring functioncannot be used.8TROUBLESHOOTING/SPECIFICATIONSTroubleshootingThis unit is designed for trouble-free operation; most problems users encounter are due to operating errors. So if you have a problem, first check this list for apossible solution. If the problem persists, consult your authorized HarmanKardon service center.If the problem is.Make sure that.No lights illuminate when power cord is plugged into AC outlet. The unit is plugged into a live outlet. The round power button above Power on the front panel is pressed in.No sound is heard. Speaker switches corresponding to the desired speakers are pressed. Correct source button has been pressed. Volume is turned up. Speaker wires are connected properly. Hook-up wires to source component are connected properly.Sound is not heard from the speaker system on one side. The speaker wires and connection wires are connected correctly. The balance control knob is set to the center.When listening to stereo sound,the left and right sounds are reversed. The speaker wires are connected correctly. The wires between components are connected correctly.Intermittent or continuous buzzing or hissing. The unit is away from fluorescent lights,TV, motors and other electrical appliances.The remote control and front panel controls dont appear to work. Disconnect the AC line cord from the wall socket,wait 5 minutes and then re-connect it.Humming noise when listening to LP Ground wire from record player has been connected to ground terminal on amplifier. Cable from record player is away from power cords and speaker cables.Howl or ringing when listening to LP. Record player is not to close to speakers. Record player is on stable surface.Low sound level when listening to LP. Cable from record player