HarmanKardon-AVR520-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR520 AVR520 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 REAR PANEL CONNECTIONS.10 REMOTE CONTROL FUNCTIONS.12 TROUBLESHOOTING GUIDE.15 PROCESSOR RESET.15 UNIT EXPLODED VIEW.16 EXPLODED VIEW PARTS LI

2、ST.17 BLOCK DIAGRAM.18 BULLETIN HK2003-07.19 TECH TIP HKTT2003-01.21 IDLE CURRENT ADJUSTMENT22 ELECTRICAL PARTS LIST.25 SCHEMATICS.73 WIRING DIAGRAM.94 PACKAGE.95 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev4 2/2004 RadioFans.CN 收音机爱 好者资料库Eachprecautioninthismanualshouldbe

3、followedduringservicing.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 thepa

4、rts 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 comp

5、onents 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 elec

6、tricity.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 p

7、otential 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 so

8、ldering 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 suffi

9、cient 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.

10、)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

11、. 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 : AVR520 AVR520 harma

12、n/kardonharman/kardonRadioFans.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,cabinetback

13、s,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 leakag

14、ecurrentusingSimpsonModel229LeakageTester,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,10wattResistorparallel

15、edbya0.15uFcapacitor,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 h

16、aving a return path to the chassis (antenna, metal,cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbeperformedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.

17、AVR520 AVR520 harman/kardonharman/kardon34 TECHNICAL SPECIFICATIONSTechnical SpecificationsAudio SectionStereo Mode Continuous Average Power (FTC)85 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohmsFive-Channel Surround Modes Power Per Individual ChannelFront L&R channels:75

18、Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:75 Watts 0.07% THD, 20Hz20kHz into 8 ohmsSurround channels:75 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsInput Sensitivity/ImpedanceLinear (High-Level)200mV/47k ohmsSignal-to-Noise Ratio (IHF-A)95dBSurround System Adjacent Chann

19、el SeparationAnalog Decoding 40dB(Pro Logic II, etc.)Dolby Digital (AC-3)55dBDTS55dBFrequency Response 1W (+0dB, 3dB)10Hz 100kHzHigh Instantaneous Current Capability (HCC)45 AmpsTransient Intermodulation Distortion (TIM)UnmeasurableRise Time16secSlew Rate40V/secFM Tuner SectionFrequency Range87.5108

20、MHzUsable SensitivityIHF 1.3 V/13.2dBfSignal-to-Noise RatioMono/Stereo 70/68dBDistortionMono/Stereo 0.2/0.3%Stereo Separation40dB 1kHzSelectivity400kHz, 70dBImage Rejection80dBIF Rejection90dBTuner Output Level1kHz, 75kHz Dev 500mVAM Tuner SectionFrequency Range5201710kHzSignal-to-Noise Ratio45dBUsa

21、ble SensitivityLoop 500VDistortion1kHz, 50% Mod 0.8%Selectivity10kHz, 30dBVideo SectionTelevision FormatNTSCInput Level/Impedance1Vp-p/75 ohmsOutput Level/Impedance1Vp-p/75 ohmsVideo Frequency Response (Composite and S)10Hz8MHz (3dB)Video Frequency Response (Component) 10Hz30MHz (3dB)GeneralPower Re

22、quirementAC 120V/60HzPower Consumption78W idle, 694W maximum (2 channels driven)Dimensions (Max)Width17.3 inches (440mm)Height6.5 inches (165mm)Depth17.1 inches (435mm)Weight35 lb (15.9 kg)Depth measurement includes knobs, buttons and terminal connections.Height measurement includes feet and chassis

23、.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.is a trademark of Harman International Industries, Inc. (Patent No. 5,386,478).*Manufactured under license from Do

24、lby Laboratories.“Dolby,”“Pro Logic,”“Pro Logic II” and the Double-D symbol aretrademarks of Dolby Laboratories. Confidential UnpublishedWorks. 19921999 Dolby Laboratories, Inc.All rights reserved.DTS, DTS Surround, DTS-ES and DTS Neo:6 are trademarks of Digital Theater Systems, Inc.UltraStereo is a

25、 trademark of UltraStereo Corp.VMAx is a registered trademark of Harman International Industries, Inc., and is an implementation of Cooper Bauck Transaural Stereo under patent license.Logic 7 is a registered trademark of Lexicon, Inc.Crystal is a registered trademark of Cirrus Logic Corp.HDCD system

26、 manufactured under license from Pacific Microsonics, Inc.This product is covered by one or more of the following: In the USA: 5,479,168; 5,638,074; 5,640,161; 5,808,574;5,838,274; 5,854,600; 5,864,311; 5,872,531; and in Australia: 669114. Other patents pending.TM AVR AVR520 520 h ha ar rmmanan/kar/

27、kardondon5 FRONT PANEL CONTROLS1 Main Power Switch: Press this button toapply power to the AVR 520.When the switchis pressed in, the unit is placed in a Standbymode, as indicated by the amber PowerIndicator 3 surrounding the SystemPower Control 2.This button MUST bepressed in to operate the unit.To

28、turn the unitoff and prevent the use of the remote control,this switch should be pressed until it pops outfrom the front panel so that the word “OFF”may be read at the top of the switch.NOTE: This switch is normally left in the “ON”position.2 System Power Control: When the MainPower Switch 1 is “ON,

29、” press this buttonto turn on the AVR 520; press it again to turnthe unit off. Note that the Power Indicator3 surrounding the switch will turn greenwhen the unit is on.3 Power Indicator: This LED will be lit inamber when the unit is in the Standby mode tosignal that the unit is ready to be turned on

30、.When the unit is in operation, the indicator willturn green.4 Headphone Jack:This jack may be used tolisten to the AVR 520s output through a pair ofheadphones. Be certain that the headphoneshave a standard 1/4 stereo phone plug. Notethat the main room speakers will automaticallybe turned off when t

31、he headphone jack is in use.5 Dolby Mode Selector: Pressing this selec-tor button cycles the AVR through the variousDolby surround modes.The first press of the but-ton switches the surround mode to the lastDolby surround mode that was in use. Each sub-sequent press selects the next mode in the fol-l

32、owing order:6 DTS Surround Mode Selector: Pressingthis selector button cycles the AVR through theDTS surround modes.The first press of the but-ton selects the last DTS surround mode thatDOLBY 3 STEREODOLBY PRO LOGIC II MOVIEDOLBY PRO LOGIC II MUSICDOLBY PRO LOGIC IIEMULATIONFront Panel Controls1 Mai

33、n Power Switch2 System Power Control3 Power Indicator4 Headphone Jack5 Dolby Mode Selector6 DTS Surround Mode Selector7 Logic 7 Mode Selector /Button8 Tone Mode9 Surround Mode Selector) Tuning Selector! Tuner Band Selector Set Button# Preset Station Selector$ Stereo Mode Selector /Button% Input Sour

34、ce Selector FM Mode Selector& DTS Neo:6 Mode Selector* Digital Optical 3 Input( Input/Output Status Indicator Digital Coax 3 Jack Video 4 Input Jacks Bass Control Balance Control Treble Control Digital Select Button Channel Select Button Volume Control Input Indicators Main Information Display Remot

35、e Sensor Window Surround Mode Indicators247913568)!#$%&*( AVR AVR520 520 h ha ar rmmanan/kar/kardondon6 FRONT PANEL CONTROLSFront Panel Controlswas in use. Each subsequent press selects thenext DTS mode in the following order:7 Logic 7 Mode Selector /Button: Thisbutton has two functions: In normal u

36、se, pressit to select one of the Logic 7 modes.When anadjustment is being made using using theChannel Select or Digital Select buttons, this button may be pressed to scrollthrough the available options.8 Tone Mode: Pressing this button enablesor disables the Bass and Treble tone controls.When the bu

37、tton is pressed so that the wordsTONE IN appear in the Main InformationDisplay, the settings of the BassandTreblecontrols may be used to adjust theoutput signals.When the button is pressed sothat the words TONE OUT appear in the MainInformation Display, the output signalwill be “flat, ” without any

38、bass or treble alter-ation, no matter how the actual Bass andTreble Controls are adjusted.9 Surround Mode Selector: Press this but-ton to change the surround mode by scrollingthrough the list of available modes. Note thatdepending on the type of input, some modesare not always available. (See page 2

39、6 for moreinformation about surround modes.) Tuning Selector: 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 is reached, the TUNED Indicator W will be litin the Main Information Di

40、splay .To tune manually, tap the button lightly andnote that the tuner will step up one frequencyincrement per button press.When the button isheld for a few seconds you will note that theunit will quickly search the frequency band.Release it once the fast tuning starts; the tunerwill automatically s

41、can for the next station withan acceptable signal and then stop.! Tuner Band Selector: Pressing this but-ton will automatically switch the AVR 520 tothe Tuner mode. Pressing it again will switchbetween the AM and FM frequency bands. (Seepage 31 for more information on the tuner.) Set Button:When mak

42、ing choices duringthe setup and configuration process, press thisbutton to enter the desired setting as shown in the Main Information Display into the AVR 520s memory.# Preset Station Selector: Press this button to scroll up or down through the list orstations that have been entered into the presetm

43、emory. (See page 32 for more information ontuner programming.)$ Stereo Mode Selector /Button:Pressing this selector button cycles through thestereo modes, and it is also used to turn off allsurround processing and place the unit in a tra-ditional two-channel Stereo mode.The firstpress selects 5-Chan

44、nel Stereo, the next pressselects 8-Channel Stereo, and the third pressselects “SURROUND OFF,” which is true Stereo.% Input Source Selector: Press this buttonto change the input by scrolling up or downthrough the list of input sources. FM Mode Selector: Press this button toselect Auto or Manual tuni

45、ng.When the buttonis pressed so that the AUTO Indicator Xlights, the tuner will search for the next stationwith an acceptable signal when the TuningSelector )uis pressed.When the but-ton is pressed so that the AUTO Indicator Xis not lit, each press of the Tuning Selector)uwill increase the frequency

46、. (Seepage 31 for more information on using thetuner.)& DTS Neo:6 Mode Selector: Pressing thisselector button cycles the AVR through the vari-ous DTS Neo:6 modes, which extract a five-channel surround field from two-channel pro-gram material.The first press selects the lastDTS Neo:6 surround mode th

47、at was in use, andeach subsequent press selects the next mode inthe following order:* Digital Optical 3 Input: Connect the opti-cal digital output of an audio or video product tothis jack.When the input is not in use, be certainto keep the plastic cap installed to avoid dustcontamination that might

48、degrade future performance.( Input/Output Status Indicator:TheseLED indicators will normally light green to showthat the front panel Video 4 A/Vjacks orthe Coaxial 3 Digitaljacks are operating asinputs.When either of these jacks has been con-figured for use as an output, the indicator willturn red t

49、o show that the jack may be used forrecording. (See page 20 for more information onconfiguring the front panel jacks as outputs,rather than inputs.) Digital Coax 3 Jack: This jack is normallyused for connection to the output of portableaudio devices, video game consoles or otherproducts that have a

50、coax digital jack. It mayalso be configured as an output jack, to feed adigital signal to a CD-R, MiniDisc or other digi-tal recording device. (See page 20 for informa-tion on configuring the Digital Coax 3 Jack asan output.) Video 4 Input Jacks: These audio/videojacks may be used for temporary conn