HarmanKardon-HK3370-rec-sm2维修电路原理图.pdf

harman/kardon hk3370/3470STEREO RECEIVERPRELIMINARYSERVICE MANUALCONTENTSESD WARNING.2LEAKAGE TESTING.3BASIC SPECIFICATIONS hk3370.4BASIC SPECIFICATIONS hk3470.5FRONT PANEL CONTROLS hk3370.6REAR PANEL CONNECTIONS hk3370.8REMOTE CONTROL FUNCTIONS HK3370.10FRONT PANEL CONTROLS hk3470.12REAR PANEL CONNECTIONS hk3470.15REMOTE CONTROL FUNCTIONS HK3470.17TROUBLESHOOTING GUIDE.19ALIGNMENT PROCEDURES.20WAVEFORMS.23BLOCK DIAGRAM.28EXPLODED VIEW HK3370.29EXPLODED VIEW HK3470.30DISASSEMBLY PROCEDURES.31MECHANICAL PARTS LIST HK3370.39ELECTRICAL PARTS LIST HK3370.40MECHANICAL PARTS LIST HK3370.57ELECTRICAL PARTS LIST HK3370.58IC DESCRIPTIONS.75PCB DRAWINGS.86SCHEMATICS.92WIRING DIAGRAM.103PACKAGE.104harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797RadioFans.CN 收音机爱 好者资料库Eachprecautioninthismanualshouldbefollowedduringservicing.Components identified with the IEC symbolin the parts list are special significance to safety. When replacing a component identified with, use only the replacement parts designated, or parts with the same ratings or resistance, wattage, or voltage that are designated in theparts list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptablyinsulated from the supply circuit before retuming the product to the customer.Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors andsemiconductor chip components.The following techniques should be used to help reduce the incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge onyour body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device,which should be removed for potential shock reasons prior to applying power to the unit under test.2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, toprevent electrostatic charge build-up or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical chargessufficient to damage ES devices.5. Do not use freon-propelled chemicals. These can generate electrical change sufficient to damage ES devices.6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacementES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material.)7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to thechassis or circuit assembly into which the device will be installed.Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing togetheror your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.CAUTION :RadioFans.CN 收音机爱 好者资料库21. Inspect all lead dress to make certain thatleads are not pinched or that hardware is notlodged between the chassis and other metalpartsintheunit.2. Be sure that any protective devices such asnonmetallic control knobs, insulating fish-papers,cabinetbacks,adjustmentandcompartment covers or shields, isolationresistor-capacitynetworks,mechanicalinsulators, etc. Which were removed for theservicingareproperlyre-installed.Before returning the unit to the user, perform the following safety checks :3. Be sure that no shock hazard exists ; check for leakagecurrentusingSimpsonModel229LeakageTester,standardequipment item No. 21641, RCA Model WT540A or usealternate method asfollows : Plug the power cord directlyInto a 120 volt AC receptacle (do not use an IsolationTransformer for this test). Using two clip leads, connect a1500ohms,10wattResistorparalleledbya0.15uFcapacitor,inserieswithallexposedmetalcabinetpartsandaknownearthground,suchas a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivity to measure the AC voltage drop across theresistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal,cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbeperformedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.315 TROUBLESHOOTING GUIDETroubleshooting GuideThis unit is designed for trouble-free operation. Most problems users encounter are due to operating errors. So, if you have a problem, firstcheck this list for a possible solution. If the problem persists, consult your authorized Harman Kardon Service Center.If the problem is.Make sure that the.No lights illuminate when POWER button is pressedUnit is plugged into a live outletMain power switch is pressed inNo sound is heardUnit has not been mutedCorrect input function selector button has been pressedVolume is turned upThe speakers have been turned on using the Speaker SelectorsNo output from one or more channelsCables are not defective: check/replace speaker cablesTuner sound has a large amount of interference, orThe antenna is properly connectedThe “Stereo” display is not illuminated, orThe antenna is properly locatedTuner sound distorts and/or volume level is too lowThe antenna is set in the proper directionThe antenna is adequate to receive the desired stationTuner is intermittent or continuously buzzing or hissingThe unit is away from fluorescent lights,TVs, motors and other electrical appliancesTechnical SpecificationsAudio SectionStereo Mode Continuous Average Power (FTC)70 Watts per channel, 20Hz20kHz 0.07% THD, both channels driven into 8 ohms95 Watts per channel, 20Hz20kHz 80dBIF Rejection100dBTuner Output Level1kHz, 100kHz Dev 500mVAM Tuner SectionFrequency Range5201710kHzSignal-to-Noise Ratio40dBUsable SensitivityLoop 500V/MDistortion1kHz, 50% Mod 0.8%Selectivity10kHz, 25dBGeneralPower RequirementAC 120V/60HzPower Consumption72W idle, 332W maximum (both channels driven)Dimension (Max)Width17.4 inches (442mm)Height6.1 inches (156mm)Depth16.3 inches (415mm)Weight24.6 lb (11.2kg)Depth measurement includes knobs, buttons and terminal connections.Height measurement includes feet and chassis.All features and specifications are subject to change without notice.Harman Kardon is a registered trademark, and Power for the digital revolution is a trademark, of Harman Kardon, Inc. HK33701. Technical Specificationhk33704250 Crossways Park Drive,Woodbury, New York 11797 2000 Harman Kardon, Incorporated Part #YIAR-K1001-02ATechnical SpecificationsAudio SectionStereo Mode Continuous Average Power (FTC)100 Watts per channel, 20Hz20kHz 0.07% THD, both channels driven into 8 ohms135 Watts per channel, 20Hz20kHz 80dBIF Rejection100dBTuner Output Level1kHz, 100kHz Dev 500mVAM Tuner SectionFrequency Range5201710kHzSignal-to-Noise Ratio40dBUsable SensitivityLoop 500V/MDistortion1kHz, 50% Mod 0.8%Selectivity10kHz, 25dBGeneralPower RequirementAC 120V/60HzPower Consumption72W idle, 332W maximum (both channels driven)Dimension (Max)Width17.4 inches (442mm)Height6.1 inches (156mm)Depth16.3 inches (415mm)Weight26.8 lb (12.1kg)Depth measurement includes knobs, buttons and terminal connections. Height measurement includes feet and chassis.All features and specifications are subject to change without notice.Harman Kardon is a registered trademark, and Power for the digital revolution is a trademark, of Harman Kardon, Inc.VMAx is a registered trademark of Harman International Industries, Inc., and is an implementation of Cooper Bauck Transaural Stereo under patent license. HK34704hk347056 FRONT PANEL CONTROLS1 Main Power Switch: Press this buttonto apply power to the HK 3370.When theswitch is pressed in, the unit is placed in aStandby mode, as indicated by the amber LED3 surrounding the System PowerControl 2.This button MUST be pressed into operate the unit.To turn the unit off and pre-vent the use of the remote control, this switchshould be pressed until it pops out from thefront panel so that the word “OFF” may be read at the top of the switch.NOTE: In normal operation this switch is left inthe “ON” position.2 System Power Control: When theMain Power Switch 1 is “ON,” press thisbutton to turn on the HK 3370; press it againto turn the unit off. Note that the PowerIndicator surrounding the switch 3 will turn green when the unit is on.3 Power Indicator: This LED will illumi-nate in amber when the unit is in the Standbymode to signal that the unit is ready to beturned on.When the unit is in operation, theindicator will briefly turn red, and then changeto green.A red indicator during normal opera-tion means that the unit is in the Protect mode,and should be turned off and then checked fora possible speaker-wire short circuit.4 Headphone Jack: This jack may beused to listen to the HK 3370s output through apair of headphones.Be certain that the head-phones have a standard 14 stereo phone plug.5 Mute: Press this button to momentarilysilence the speaker output of the HK 3370.6 Speaker 1 Button: Press this button toturn the speakers connected to the Speaker 1output terminals on or off.7 Speaker 2 Button: Press this button toturn the speakers connected to the Speaker 2output terminals on or off.Front Panel Controls21MEMORYPRESETSLEEPAUTOMUTET-MONTUNEDST79!#%&(8) $*252627242322202134561 Main Power Switch2 System Power Control3 Power Indicator4 Headphone Jack5 Mute6 Speaker 1 Selector7 Speaker 2 Selector8 Phone Input Selector9 T-Mon Input Selector) Tuning Button! Tape Input Selector Preset Scan# CD Input Selector$ Aux Input Selector% Preset Selector Dimmer Button& FM/AM Selector* FM Mode Selector( Sleep Button Bass Control Treble Control Balance Control Volume Control Volume/Mute Indicator Information Display Speaker Selection Indicators Remote Sensor WindowHK3370 ONLY7 FRONT PANEL CONTROLSFront Panel Controls8 Phono Input Selector: Press this but-ton to select the output of a turntable that isconnected to the Phono inputs.9 T-Mon Input Selector: Press this button to listen to the output of a taperecorder connected to the Tape Monitorinputs.The T-Mon indicator will illuminateto indicate that the input source is being monitored when the HK 3370 is connected toa three-head tape deck or another unit withoff-head playback.) Tuning Button: Press the left side of thebutton to tune lower frequency stations and theright side of the button to tune higher frequencystations.When a station with a strong signal istuned, the TUNED indicator will illuminate inthe Information Display .A brief (1/2second) press of the button will manually tuneto the next frequency increment, while pressingand holding the button for a longer period willautomatically tune to the next station with asignal strong enough for acceptable reception.! Tape Input Selector: Press this buttonto listen to the output of a tape recorder or otherdevice connected to the Tape 2 inputs . Preset Scan: Press this button to auto-matically scan through the stations that havebeen programmed in the HK 3370s memory.The tuner will play five seconds of each stationbefore moving to the next preset station.Tostop the scan when the desired station isheard, press the button again. (See page 14 formore information on the tuner memory system.)# CD Input Selector: Press this buttonto listen to the output of a CD player connectedto the CD inputs .$ Aux Input Selector: Press this buttonto listen to the output of a device connected tothe Aux inputs .% Preset Selector: Press this button tostep up or down through the list of stationsthat has been entered into the preset memory.(See page14 for more information on tunerprogramming.) Dimmer Button: Press this button todim the front panel displays and indicators.Thefirst press of the button will dim the displays toone-half normal brightness; the next press willturn all displays off except for the PowerIndicator 3 and the SpeakerSelection Indicators . Note that whenthe panel is dimmed, it will return to normalbrightness after the unit is turned off, then onagain.& FM/AM Selector: Press this button toselect the tuner as the input to the receiver.When the tuner is in use, press this button tochange between the AM and FM frequencybands.* FM Mode Selector: Press this buttonto select the stereo or mono mode for FM tun-ing. In the STEREO mode, a Stereo indicatorwill illuminate in the Information Display, and stereo reception will be provided whenstations are transmitting stereo signals. In theMONO mode, the left and right signals fromstereo broadcasts will be mixed together andreproduced through all channels. Select MONOfor better reception of weak signals.( Sleep Button: Press this button to placethe unit in the Sleep mode. Each press of thebutton selects the amount of time that willremain before the unit automatically goes into the Standby mode, as shown in theInformation Display , in the followingorder: Bass Control: Turn this control to modi-fy the low-frequency output of the left/rightchannels by as much as 10dB. Set this controlto a suitable position for your taste and roomacoustics. Treble Control: Turn this control tomodify the high-frequency output of theleft/right channels by as much as 10dB. Setthis control to a suitable position for your tasteand room acoustics. Balance Control: Turn this control tochange the relative volume for the frontleft/right channels. Volume Control: Turn the knob clock-wise to increase volume, counterclockwise todecrease the volume. Volume/Mute Indicator: This indicatorwill glow green when the HK 3370 is turnedon. Its position will enable you to judge therelative volume of the unit even when thespeakers are muted or turned off.When theindicator is pointing toward the left, at an“8 oclock” position, the volume is low; when it is pointing to the right, as in a “3 oclock”position, the volume is loud.When the unit hasbeen muted by pressing the Mute button 5, the indicator will flash. Information Display: This displaydelivers messages and status indications tohelp you operate the receiver. Speaker Selection Indicators:These indicators light as a green LED next tothe designation for each speaker pair to showwhen they are active. Press the Speaker 17 or Speaker 2 7 Selectors to activateeither pair of speakers. Remote Sensor Window: The sensorbehind this window receives infrared signalsfrom the remote control.Aim the remot