HarmanKardon-AVR745-avr-sm1维修电路原理图.pdf
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1、 harman/kardon AVR745 AVR745 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTSESD WARNING.2ELECTRICAL PARTS LIST.11LEAKAGE TESTING.3SEMICONDUCTOR PINOUTS36BASIC SPECIFICATIONS.4PCB DRAWINGS.87TROUBLESHOOTING GUIDE.5SERVICE PROCEDURE.100PROCESSOR RESET.5BLOCK DIAGRAM.103PACKAGING.6CIRCUIT DESCRIPTIO
2、N.105PACKING PARTS LIST.7WIRING DIAGRAM.106UNIT EXPLODED VIEW.8SCHEMATIC DIAGRAMS.107EXPLODED VIEW PARTS LIST.9harman/kardon, Inc.250 Crossways Park Dr.Woodbury, New York, 11797harman/kardonService manual AVR745EUPage 1 of 118RadioFans.CN 收音机爱 好者资料库Rev0 - 08/2007Eachprecautioninthismanualshouldbefol
3、lowedduringservicing.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
4、 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 compone
5、nts 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 electri
6、city.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 pote
7、ntial 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 solde
8、ring 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 sufficie
9、nt 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.
10、 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. M
11、inimize 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 : harman/kardonService m
12、anual AVR745EUPage 2 of 118RadioFans.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 curre
13、nt 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.
14、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 TestLeakagecurrenttest
15、erReading shouldnot be above0.5mAEarthgroundharman/kardonService manual AVR745EUPage 3 of 118ENGLISHTechnical SpecificationsAudio SectionStereo Mode Continuous Average Power (FTC)100Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohms5/7 Channel Surround Modes Power Per Individu
16、al ChannelFront L&R channels:85Watts per channel, 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:85Watts, 0.07% THD, 20Hz20kHz into 8 ohmsSurround (L & R Side, L & R Back) channels:85Watts per channel, 0.07% THD, 20Hz20kHz into 8 ohmsInput Sensitivity/Impedance Linear (High Level)200mV/47kohmsSignal
17、-to-Noise Ratio (IHF-A)95dBSurround System Adjacent Channel Separation Analog Decoding 40dB (Pro Logic, etc.) Dolby Digital (AC-3) 55dB DTS55dBFrequency Response 1W (+0dB, 3dB)10Hz130kHzHigh Instantaneous Current Capability (HCC)60 AmpsTransient Intermodulation Distortion (TIM)UnmeasurableRise Time1
18、6secSlew Rate40V/sec*FM Tuner SectionFrequency Range87.5108MHzUsable SensitivityIHF 1.3 V/13.2dBfSignal-to-Noise RatioMono/Stereo: 70/68dB (DIN)DistortionMono/Stereo: 0.15/0.2%Stereo Separation40dB 1kHzSelectivity400kHz: 70dBImage Rejection80dBIF Rejection90dBAM Tuner SectionFrequency Range5201710kH
19、zSignal-to-Noise Ratio45dBUsable SensitivityLoop: 500VDistortion1kHz, 50% Mod: 0.8%Selectivity10kHz: 30dBVideo SectionVideo FormatPAL/NTSCInput Level/Impedance1Vp-p/75 ohmsOutput Level/Impedance1Vp-p/75 ohmsVideo Frequency Response(Composite and S-Video)10Hz8MHz (3dB)Video Frequency Response (Compon
20、ent)10Hz-50MHz (-3dB)HDMI Version 1.1GeneralPower RequirementAC 220-240V/50HzPower Consumption120W idle, 1400W maximum (7 channels driven) Dimensions (Max)Width440mm Height165mm Depth435mm Weight19.9 kgDepth measurement includes knobs, buttons and terminal connections. Height measurementincludes fee
21、t and chassis.All features and specifications are subject to change without notice.Harman Kardon and Power for the Digital Revolution are registered trademarks of Harman International Industries, Incorporated.and are trademarks of Harman International Industries, Incorporated.(Patent No.5,386,478).*
22、Manufactured under license from Dolby Laboratories.“Dolby,”“Pro Logic,”“Pro Logic II,” Pro Logix IIx and the Double-D symbol are trademarks ofDolby Laboratories. Confidential Unpublished Works. 19921999 Dolby Laboratories, Inc.All rights reserved.DTS and DTS Surround, DTS-ES and DTS Neo:6 are tradem
23、arks of Digital Theater Systems, Inc.Logic 7 is a registered trademark of Harman International Industries, Incorporated.A-BUS and A-BUS/READYReady are registered trademarks of Leisure Tech Electronics Pty LtdAustralia.TiVo is a registered trademark of TiVo, Inc.SACD is a trademark of Sony Corporatio
24、n.iPod is a registered trademark of Apple Computer, Inc.DLP and Texas Instruments are trademarks of Texas Instruments.Faroudja and DCDi by Faroudja are trademarks of Genesis Microchip, Inc.HD-DVD is a trademark of the DVD Format/Logo Licensing Corporation (DVD FLLC).HDMI, the HDMI logo and High-Defi
25、nition Multimedia Interface are trademarks or registeredtrademarks of HDMI Licensing, LLC.Microsoft,Windows and Windows Media are registered trademarks of Microsoft Corporation inthe United States and other countries.*Without input anti slewing and output isolation networks. The BridgeTMSupplied Acc
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