HarmanKardon-AVR240-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR240 AVR240 7 X 50W 7.1 CHANNEL A/V RECEIVER PRELIMINARY SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 PACKAGING.5 FRONT PANEL CONTROLS.6 REAR PANEL CONNECTIONS.9 REMOTE CONTROL FUNCTIONS.12 CONNECTIONS.16 OPERATION.18 TROUBLESHOOTING GUIDE.24 PROCES

2、SOR RESET.24 DISASSEMBLY25 UNIT EXPLODED VIEW.26 EXPLODED VIEW PARTS LIST27 AMP BIAS ADJUSTMENT.28 TECH TIP HK2003-01.29 BLOCK DIAGRAM.30 ELECTRICAL PARTS LIST.31 PCB DRAWINGS72 SEMICONDUCTOR PINOUTS.78 SCHEMATICS149 WIRING DIAGRAM.156 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11

3、797 www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoRadioFans.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 r

4、eplacement 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

5、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 chi

6、p 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 g

7、round. 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 surfa

8、ce 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

9、 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

10、 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

11、 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

12、foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.CAUTION :AVR240 AVR240 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoRadioFans.CN 收音机爱 好者资料库2SAFETY PRECAUTIONSThe following check should be performed for the continuedprotecti

13、on 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, con

14、trol 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

15、THE APPLIANCETO THE CUSTOMER.DeviceundertestTest allexposed metalsurfacesAlso test withplug reversed(Using AC adapterplug as required)AC Leakage TestLeakagecurrenttesterReading shouldnot be above0.5mAEarthgroundAVR240 AVR240 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.inf

16、oAVR 240 TECHNICAL SPECIFICATIONSAudio SectionStereo Mode Continuous Average Power (FTC)65 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohmsSix-Channel Surround Modes Power per Individual ChannelFront L&R channels:50 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter ch

17、annel:50 Watts 0.07% THD, 20Hz20kHz into 8 ohmsSurround (L & R Side, Back) channels:50 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsInput Sensitivity/ImpedanceLinear (High-Level)200mV/47k ohmsSignal-to-Noise Ratio (IHF-A)100dBSurround System Adjacent Channel SeparationPro Logic 40dBDolby Digita

18、l 55dBDTS55dBFrequency Response 1W (+0dB, 3dB)10Hz 130kHzHigh Instantaneous Current Capability (HCC)35 AmpsTransient Intermodulation Distortion (TIM)UnmeasurableSlew Rate40V/secFM Tuner SectionFrequency Range87.5108.0MHzUsable SensitivityIHF 1.3V/13.2dBfSignal-to-Noise RatioMono/Stereo 70/68dBDistor

19、tionMono/Stereo 0.2/0.3%Stereo Separation40dB 1kHzSelectivity400kHz, 70dBImage Rejection80dBIF Rejection90dBAM Tuner SectionFrequency Range5201720kHzSignal-to-Noise Ratio45dBUsable SensitivityLoop 500VDistortion1kHz, 50% Mod 0.8%Selectivity10kHz, 30dBVideo SectionTelevision FormatNTSCInput Level/Imp

20、edance1Vp-p/75 ohmsOutput Level/Impedance1Vp-p/75 ohmsVideo Frequency Response (Composite and S-Video)10Hz8MHz (3dB)Video Frequency Response (Component Video) 10Hz50MHz (3dB)GeneralPower RequirementAC 120V/60HzPower Consumption65W idle, 540W maximum (6 channels driven)Dimensions (Product)(Shipping)W

21、idth17.3 inches (440mm)21.5 inches (545mm) Height6.6 inches (168mm)9.9 inches (251mm) Depth15 inches (382mm)17.9 inches (455mm) (Product)(Shipping)Weight 24.4 lb (11.1kg)29.3 lb (13.3kg)Depth measurement includes knobs, buttons and terminal connections.Height measurement includes feet and chassis.Al

22、l features and specifications are subject to change without notice.Harman Kardon, Harman International, Power for the Digital Revolution and Logic 7 are registered trademarks,and The Bridge and are trademarks,of Harman International Industries, Incorporated.*Manufactured under license from Dolby Lab

23、oratories. Dolby, Pro Logic and the double-D symbol are registered trademarks of Dolby Laboratories.DTS, DTS Surround, DTS-ES, DTS 96/24 and DTS Neo:6 are registered trademarks of DTS, Inc.VMAx is a registered trademark of Harman International Industries, Incorporated, and is an implementation of Co

24、oper Bauck Transaural Stereo under patent license.SACD is a trademark of Sony Electronics, Inc.Apple and iPod are registered trademarks, and Shuffle is a trademark, of Apple Computer, Inc. The BridgeTMPlease register your product on our Web site at . Note:Youll need the products serial number.At the

25、 same time you can choose to be notified about our new products and/or special promotions.AVR240 AVR240 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infowww.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoFRONT-PANEL CONTROLS1 Main Power Switch: Press this button

26、 to applypower to the AVR 240. When the switch is pressedin, the unit is in a Standby mode, as indicated by theamber Power Indicator 2. This button MUST bepressed in to operate the unit. To turn the unit off andprevent the use of the remote control, this switchshould be pressed until it pops out fro

27、m the frontpanel and the word “OFF” is seen at the top of theswitch.NOTE: This switch is normally left in the “ON” position.2 Power Indicator: This LED lights amber when theunit is in the Standby mode to signal that the AVR isready to be turned on.When the unit is in operation,the indicator is blue.

28、3 Standby/On Switch: When the Main PowerSwitch 1 is “ON,” press this button to turn on theAVR 240; press it again to turn the unit off.The PowerIndicator 2 turns blue when the unit is on.4 Headphone Jack: This jack may be used to listento the AVR 240s output through a pair of headphones.The speakers

29、 will automatically be turned off when theheadphone jack is in use.When configuring your sys-tem using EzSet+, the calibration microphone shouldbe plugged into this jack using the supplied adaptorthat converts the small mini-plug at the end of themicrophones cord to a 1/4 plug.5 Tone Mode: This butt

30、on controls the tone modesettings, enabling adjustment of the bass and trebleboost/cut.You may also use it to take the tone con-trols out of the signal path completely for “flat”response.The first press of the button displays aTONE IN message in the Lower Display Line and in the on-screen display.To

31、 take the controlsout of the signal path, press either of the /Buttons ) until the display reads TONE OUT.To change the bass or treble settings, make sure thatTONE IN appears in the Lower Display Line or press either of the / Buttons ) until it does.Press the Tone Mode Button 5 until the desiredopti

32、on of TREBLE MODE or BASS MODEappears in the Lower Display Line and in theon-screen display and then press either of the /Buttons ) to enter the desired boost or cut setting.Both treble and bass contours may be boosted or cut by up to + or 10dB in increments of 2dB. Seepages 21 and 31 for more infor

33、mation on the tonecontrols.NOTE: The AVR 240 is not equipped with a traditionalBalance control.When listening to two-channel materi-als, if you wish to adjust the stereo image, you mayuse the Channel Adjust Selector to increase ordecrease the level of the left front channel by up to +or 10dB, and th

34、en to decrease or increase the rightfront channel by the corresponding amount. However,when listening to surround materials and most two-channel materials, it is recommended that you leavethese settings at the results obtained during the config-uration process described on pages 19 through 30.1 Main

35、 Power Switch2 Power Indicator 3 Standby/On Switch4 Headphone Jack5 Tone Mode 6 Speaker Selector7 Surround Mode Group Selector8 Surround Mode Selector9 Tuning Selector)/Buttons! Tuner Band Selector Set Button# Digital Input Selector$ Preset Station Selector% Delay Adjust Selector Input Source Select

36、or& Tuner Mode Selector * Optical 3 Digital Audio Input( Coaxial 3 Digital Audio Input Video 4 Video Input Jacks Video 4 Audio Input Jacks Channel Adjust Selector Volume Control Input Indicators Speaker/Channel Input Indicators Upper Display Line Lower Display Line Surround Mode Indicators Remote Se

37、nsor WindowDIGITALLOGIC 7VID 1DVDCDFMAMTAPE6 8 CHVID 2VID 3VID 4PRO LOGIC 3 STEREO DSP5 7 CH. STEREOSURR. OFF1267#(*8)!)&%3459$AVR 240Optical 3Coaxial 3Video 4FRONT-PANEL CONTROLSFRONT-PANEL CONTROLS 5 5NOTE: To make it easier to follow the instructions that refer to this illustration, a larger copy

38、 may be downloaded from the Product Support section for this productat .AVR240 AVR240 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info6 Speaker Selector: Press this button to begin the process of configuring the unit to match the type of speakers used in your listening ro

39、om. (See pages2628 for more information on speaker setup andconfiguration.)7 Surround Mode Group Selector: Press this but-ton to select the top-level group of surround modes.Each press of the button will select the current or lastused mode in each of the surround mode groups(e.g., Dolby, DTS, DTS Ne

40、o:6, Logic 7, DSP, Stereo).When the button is pressed so that the name of thesurround mode group appears in the on-screen dis-play and in the Lower Display Line , press theSurround Mode Selector 8 to cycle through theindividual modes available. For example, press thisbutton to select Dolby modes, an

41、d then press theSurround Mode Selector 8 to choose from thevarious Dolby mode options.8 Surround Mode Selector: Press this button to select from among the available surround modeoptions for the mode group selected.The specificmodes will vary based on the number of speakersavailable, the mode group a

42、nd if the input source isdigital or analog. For example, press the SurroundMode Group Selector 7 to select a main modegrouping such as Dolby or Logic 7, and then pressthis button to see the specific mode choices available.Note that the digital surround modes, such as DolbyDigital and DTS, may not be

43、 accessed unless that typeof source signal is present, such as when a DVD movieor television signal programmed in Dolby Digital or DTSsurround sound is playing. For more information on sur-round mode selection, see pages 23 and 32.9 Tuning Selector: Press the left side of the buttonto tune lower-fre

44、quency stations and the right side ofthe button to tune higher-frequency stations.When thetuner is in the Manual mode, each tap will increase ordecrease the frequency by one increment.When thetuner receives a strong enough signal for adequatereception, MANUAL TUNED will appear in theon-screen displa

45、y and the Lower Display Line.When the tuner is the Auto mode, press the buttononce, and the tuner will scan for a station with accept-able signal strength.When the next station with astrong signal is tuned the scan will stop and the on-screen display and Lower Display Linewill indicate AUTO TUNED.Wh

46、en an FM Stereo station is tuned, the display will read AUTO ST TUNED.To switch back and forth between the Auto andManual tuning modes, press the Tuner ModeSelector &.)/Buttons: When configuring the AVR 240ssettings,use these buttons to select from the availablechoices.! Tuner Band Selector: Press t

47、his button to turnthe AVR on and to select the Tuner as the input. Pressit again to switch between the AM and FM frequencybands.(See page 37 for more information on the tuner.) Set Button: When making choices during thesetup and configuration process, press this button to enter the desired setting i

48、nto the AVR 240s memory.# Digital Input Selector: Press this button toselect one of the digital audio inputs or the analogaudio input for any source. (See pages 3237 formore information on digital audio.)$ Preset Stations Selector: Press this button toscroll up or down through the list of stations t

49、hat havebeen entered into the preset memory. (See page 37for more information on tuner presets.)% Delay Adjust Selector: Press this button tobegin the steps required to enter delay settings. (Seepages 2829 for more information on delay times.) Input Source Selector: Press this button tochange the in

50、put by scrolling up or down through thelist of Input Indicators .& Tuner Mode Selector: Press this button to selectAuto or Manual tuning.When the button is pressed sothat the AUTO appears in the Lower Display Line, the tuner will search for the next station with anacceptable signal when the Tuning S