HarmanKardon-HK3485-avr-sm维修电路原理图.pdf

harman/kardon HK3485 HK3485 STEREO RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 SPECIFICATIONS .4 PACKAGE.5 FRONT PANEL CONTROLS .6 REAR PANEL CONNECTIONS .9 REMOTE CONTROL FUNCTIONS .11 CONNECTIONS/INSTALLATION.13 OPERATION.19 TROUBLESHOOTING GUIDE.23 PROCESSOR RESET.23 DISASSEMBLY PROCEDURES24 EXPLODED VIEW .25 AMPLIFIER BIAS ADJUSTMENT.26 BLOCK DIAGRAM.27 IC DESCRIPTIONS/PINOUTS28 ELECTRICAL PARTS LIST 42 PCB DRAWINGS.47 SCHEMATICS.49 WIRING DIAGRAM.51 harman/kardon, Inc. 250 Crossways Park Dr. Released 2007 Woodbury, New York 11797 Rev0 7/2007 Discontinued XXXX RadioFans.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 :HK3485 harman/kardonharman/kardon 2RadioFans.CN 收音机爱 好者资料库SAFETY PRECAUTIONSThe following check should be performed for the continuedprotection of the customer and service technician.LEAKAGE CURRENT CHECKMeasure leakage current to a known earth ground (waterpipe, conduit, etc.) by connecting a leakage current testerbetween the earth ground and all exposed metal parts of theappliance (input/output terminals, screwheads, metaloverlays, control shaft, etc.). Plug the AC line cord of theappliance directly into a 120V AC 60Hz outlet and turn theAC power switch on. Any current measured must not exceedo.5mA.ANY MEASUREMENTS NOT WITHIN THE LIMITSOUTLINED ABOVE ARE INDICATIVE OF APOTENTIAL SHOCK HAZARD AND MUST BECORRECTED BEFORE RETURNING THE APPLIANCETO THE CUSTOMER.DeviceundertestTest allexposed metalsurfacesAlso test withplug reversed(Using AC adapterplug as required)AC Leakage TestLeakagecurrenttesterReading shouldnot be above0.5mAEarthground3HK3485 harman/kardonharman/kardon HK 3485 TECHNICAL SPECIFICATIONSAudio SectionStereo Mode:Continuous Average Power (FTC):120 Watts per channel, 20Hz 20kHz, 0.07% THD, both channels driven into 8 ohms150 Watts per channel, 20Hz 20kHz 80dBIF Rejection:100dBTuner Output Level:1kHz, 100kHz, Dev 500mVAM Tuner SectionFrequency Range:520 1710kHzSignal-to-Noise Ratio:40dBUsable Sensitivity:Loop 500V/MDistortion:1kHz, 50% Mod 0.8%Selectivity:10kHz, 25dBVideo SectionTelevision Format:NTSC/PAL/SECAMSignal Format:CompositeInput Level:1Vp-pInput Impedance:75 Ohms, unbalancedSync Polarity:NegativeOutput Level:1Vp-pOutput Impedance:75 Ohms, unbalancedVideo Frequency Response:10Hz 10MHzGeneralPower Requirement:AC 120V/60HzPower Consumption:3W standby, 280W maximum (both channels driven)Dimensions:(Product)(Shipping)Width:17.4 (442mm)21.5 (545mm) Height:6.6 (168mm)9.9 (251mm) Depth:15 (382mm)17.9 (455mm)(Product)(Shipping)Weight:20.9 lb (9.5kg)25.1 lb (11.4kg)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 trademark of Harman International Industries, Incorporated,registered in the United States and/or other countries. Designed to Entertain is a trademark of Harman International Industries, Incorporated.CEA is a registered trademark of the Consumer Electronics Association.iPod is a trademark of Apple Inc., registered in the U.S. and other countries.HK 3485 OM 2/15/07 4:21 PM Page 264HK3485 harman/kardonharman/kardon 5FRONT-PANEL CONTROLSPower Switch:This electrical switch turns the receiver on for playback, or leaves it in Standby mode for quick turn-on using theremote control.Power Indicator:This LED has two modes.When power is turned off, the LED is amber to indicate that the receiver is plugged in and ready to be turned on.When the receiver is turned on, the LED turns blue.Headphone Jack:Plug a 1/4 headphone plug into this jack for private listening.Mute:Press this button to mute the HK 3485s speaker and head-phone outputs temporarily.To end the muting, press this button or adjustthe volume. Muting is also canceled when the receiver is turned off.Speaker 1/2:Press the left side of this button to enable the HK 3485 to output audio to the speakers connected to the Speaker 1Outputs, and press the right side of the button to enable the Speaker 2Outputs.You may enable or disable both sets of speaker outputs simul-taneously.This feature is a convenient way of hearing audio in morethan one room at a time, although the same source material will beplayed through both sets of speakers.Tuning:Press either side of this button to tune a radio station.Tap thebutton briefly to tune one frequency step at a time, or press and holdthe button to seek the next frequency with an acceptably strong signal.Preset Scan:Press this button once to scan through the stations you have previously programmed as presets. Each station will play forfive seconds before the tuner skips to the next preset station. Press thebutton a second time to select the current station. If no presets havebeen programmed, the 0 PRESET message will be displayed.Preset Stations:Press this button to select a preset radio station.If no presets have been programmed, the 0 PRESET message will be displayed.Tuner Band:Press this button to select the tuner as the source, or to select the AM (right side of button) or FM (left side of button) band.FM Mode:This button toggles between Stereo and Mono modeswhen an FM station is tuned. Mono mode may improve reception ofweaker signals.Bass Control:Turn the knob clockwise to boost low-frequency outputby up to 10dB, or counterclockwise to cut low-frequency output by upto 10dB. Set the control to suit your taste and room acoustics.Video 3,Analog Audio and Video Inputs:Connect a sourcecomponent that will only be used temporarily to these jacks, such as a camera or game console, or connect an iPod using the suppliedaudio/video cable.Balance Control:Turn the knob to adjust the relative volume of theleft and right channels, which affects imaging and can compensate forroom characteristics.Volume Control:Turn this knob to raise or lower the volume, whichwill be shown in decibels (dB) in the Message Display.Treble Control:Turn the knob clockwise to boost high-frequencyoutput by up to 10dB, or counterclockwise to cut high-frequency outputby up to 10dB. Set the control to suit your taste and room acoustics.Sleep:Press this button to activate the sleep timer, which shuts off thereceiver after a programmed period of time up to 90 minutes.Dimmer:Some people find the front-panel display distracting. Pressthis button once to dim the displays to half-brightness, and a secondtime to turn the displays completely off.The Power Indicator will alwaysremain lit to remind you that the receiver is turned on. Press the buttona third time to return the display to normal brightness.This setting iscanceled when the unit is turned off.Message Display:Various messages appear in this display inresponse to commands.Video Source Selectors:Press any of these buttons to select the device connected to the corresponding Audio and Video Inputs forplayback. Remember to turn on the source device, to connect the VideoMonitor Output to your video display and to turn on your video displayand select the correct Video Input.NOTE: The Video 3 source device may be connected to eitherthe front- or rear-panel connectors.To select the desired device,press the Video 3 Source Selector repeatedly until the dot tothe left of the Video 3 Indicator in the Message Display lightssteadily (rear-panel connections selected) or flashes (front-panelconnections selected).CD Source Selector:Press this button to select the device connected to the CD Inputs as the source.Tape Source Selector:Press this button to select the device connected to the Tape/CDR Audio Inputs as the source. If you are making a recording using a three-head tape deck or another unit withoff-head playback, the dot to the left of the Tape Monitor Indicator in the Message Display will flash when the recording is being monitored.Phono Source Selector:Press this button to select a turntableconnected to the Phono Inputs as the source.HK 3485 OM 2/15/07 4:20 PM Page 76HK3485 harman/kardonharman/kardon MuteTuningPreset StationsSpeaker 1/2Preset ScanFM ModeTunerBandBassControlVideo 3Video InputVideo 3Audio InputsPowerIndicatorHeadphoneJackPowerSwitchVolumeControlCD Source SelectorTape Source SelectorPhono Source SelectorVideo Source SelectorsMessage DisplayDimmerSleepTrebleControlBalanceControlNOTE: To make it easier to follow the instructions throughout the manual that refer to this illustration, a copy of this page may be downloaded from the Product Support section .HK 3485 OM 2/15/07 4:20 PM Page 87HK3485 harman/kardonharman/kardon Speaker 1/2:The dot to the left of the indicator for each speakerpair will light when that pair is active. Press the Speaker 1/2 Selectors to activate either or both pairs of speakers.Messages:This display shows messages relating to the status, inputsource, tuner or other aspects of the HK 3485s operation.Preset Number/Sleep Timer:When the tuner is in use, thesenumbers indicate the specific preset memory location in use.When theSleep function is in use, these numbers show how many minutes remainbefore the unit turns off.Source Inputs:The dot to the left of the name of the device that iscurrently the source input for the HK 3485 will light.When the device connected to the Tape Monitor Inputs has been selected, the dot to the left of the Tape Monitor Input Indicator will flashto indicate that you are monitoring a recording being made on thedevice connected to the Tape Monitor Inputs, if the recorder has off-head playback.The dot to the left of the Input Indicator for the last-selected source input will remain lit.Sleep Indicator:This indicator lights when the Sleep function is inuse.The numbers in the Preset Number/Sleep Timer Indicators will showthe minutes remaining before the HK 3485 turns off.Preset Indicator:This indicator lights when the tuner is in use toshow that the Preset Number/Sleep Timer is showing the stations preset memory number.Memory Indicator:This indicator flashes when entering presets and other information into the tuners memory.Stereo Indicator:This indicator lights when an FM station is beingtuned in stereo.Tuned Indicator:This indicator lights when a station is being receivedwith sufficient signal strength to provide acceptable listening quality.Auto Indicator:This indicator lights when the tuners Auto Stereomode is in use.Mute Indicator:This indicator flashes to remind you that the HK 3485s output has been silenced by pressing the Mute Button.Press the button again to end muting.FRONT-PANEL INFORMATION DISPLAYSPEAKER 2SPEAKER 1PHONOCDFMVID 1TAPE M.VID 2PRESETAMVID 3AUTOTUNEDSTEREOMUTESLEEPMEMORYSpeaker 1/2MuteAutoTunedStereoMemory Preset SleepMessagesPreset Number/Sleep TimerSource InputsNOTE: To make it easier to follow the instructions that refer to this illustration, a larger copy may be downloaded from the Product Supportsection for this product at .HK 3485 OM 2/15/07 4:20 PM Page 98HK3485 harman/kardonharman/kardon REAR-PANEL CONNECTIONSAM and FM Antenna Terminals:Connect the included AM andFM antennas to their respective terminals for radio reception.Video 1,Video 2 and Video 3 Audio/Video Inputs:Thesejacks may be used to connect your video-capable source components(e.g.,VCR, DVD player, cable TV box) to the receiver.NOTE: The Video 3 source has inputs on both the front andrear panels of the HK 3485, and you may connect differentdevices to each set of inputs.To select between the two sets ofinputs, press the Video 3 Source Selector repeatedly. Observethe HK 3485s front panel.When the dot next to the Video 3Input Indicator lights steadily, the device connected to the rearpanel has been selected.When the dot flashes, the device connected to the front panel has been selected.Video 1 Audio/Video Outputs:These jacks may be used to connect your VCR or another recorder.Video Monitor Output:If some of your sources use video connec-tions, then you will need to connect the Video Monitor Output to the corresponding input on your television or video display in order to viewthe sources. No video signal will be available when an audio-only sourceinput, such as CD or Tape, is selected.Remote Infrared (IR) Input and Output:When the remote IR receiver on the front panel is blocked, such as when the HK 3485 is placed inside a cabinet, connect an optional IR receiver to theRemote IR Input jack for use with the remote control.The Remote IR Output may be conn