HarmanKardon-AVR7300-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR7300 AVR7300 7 x 110W 7.1 CHANNEL A/V RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FEATURES.5 FRONT PANEL CONTROLS.6 REAR PANEL CONNECTIONS.10 REMOTE CONTROL FUNCTIONS.14 INSTALLATION/CONNECTIONS.18 OPERATION.21 TROUBLESHOOTING GUIDE.29 PR

2、OCESSOR RESET.29 UNIT EXPLODED VIEW.30 EXPLODED VIEW PARTS LIST.31 BLOCK DIAGRAM.33 CIRCUIT DESCRIPTION.34 DC OFFSET/IDLE CURRENT ADJ.45 BULLETIN HK2005-01.49 TECH TIP HKTT2003-01.50 ELECTRICAL PARTS LIST.51 SEMICONDUCTOR PINOUTS70 PCB DRAWINGS.99 SCHEMATICS146 WIRING DIAGRAM.157 PACKAGING PARTS LIS

3、T.158 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 3/2005 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

4、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 t

5、hat 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 devi

6、ces 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 as

7、sembly, 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 elec

8、trical 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.

9、 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

10、 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 devi

11、ce, 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

12、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 :AVR7300 harman/kardonAVR7300 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoRadioFans.

13、CN 收音机爱 好者资料库2SAFETY 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 an

14、d 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 LIMI

15、TSOUTLINED 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 above0.5mAEar

16、thgroundAVR7300 harman/kardonAVR7300 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoAVR 7300 TECHNICAL SPECIFICATIONS 59AVR 7300 TECHNICAL SPECIFICATIONSAudio SectionStereo Mode Continuous Average Power (FTC)125 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driv

17、en into 8 ohmsSeven-Channel Surround Modes Power per Individual ChannelFront L&R channels:110 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:110 Watts 0.07% THD, 20Hz20kHz into 8 ohmsSurround (L & R Side, L & R back) channels:110 Watts per channel Composite DownconversionYesBacklit

18、YesVideo Scaler/EnhancerFaroujda 2300 PluginVideo Test Signals, Color BarsYesAUDIO INPUTSAM/FMYesCD YesTapeYes6 (5.1) Channel DirectYes8 (7.1) Channel DirectYesAUDIO/VIDEO INPUTSVideo 1RearVideo 2 RearVideo 3RearVideo 4RearVideo 5FrontDVD(Rear)YesS-VHS Video Inputs/OutputsYesComponent Video Inputs/O

19、utputs, HD TV Capable3 In, 1 Out, 100MhzComponent Video Inputs, ConfiguarableYesAVR7300 harman/kardonAVR7300 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoFRONT-PANEL CONTROLS1 Standby/On Button2 Surround Mode Group Selector 3 Surround Mode Selector4 Tuning Selector 5 T

20、uner Band Selector6 Preset Stations Selector7 Input Source Selector8 Tuner Mode Selector9 Front-Panel Control Door) Volume Control! Input Indicators Speaker/Channel Input Indicators# Upper Display Line $ Lower Display Line% Surround Mode Indicators Remote Sensor WindowFRONT-PANEL CONTROLSFRONT-PANEL

21、 CONTROLS 5 5The following controls and indicators are available on the AVR 7300s front panel:The following controls and jacks are located behind the Front-Panel Control Door 9.To open the door, gently press the left or right bottom-corner edge of the door in and gently swing the door down towards y

22、ou.Main Power SwitchHeadphone JackTone Mode ButtonSpeaker Selector ButtonChannel Adjust SelectorDigital Input SelectorDelay Adjust Selector/ButtonsSet/Video ButtonOptical 4 Digital InputOptical Digital OutputCoaxial 4 Digital InputCoaxial Digital OutputVideo 5 Audio/Video JacksInput/Output Indicator

23、NOTE: To make it easier to follow the instructions that refer to this illustration, a larger copy may be downloaded from the Product Support section for this product .12)$#!%34 56781256734981314101112159123456789101112131415AVR7300(120v)-OM 6/14/04 9:15 AM Page 5AVR7300 harman/kardonAVR7300 harman/k

24、ardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoFRONT-PANEL CONTROLS6 FRONT-PANEL CONTROLS1 Standby/On Button: When the Main PowerSwitch is pressed in so that it is in the “ON”position, press this button to turn on the AVR 7300.When the unit is in the Standby mode, the switch iss

25、urrounded by amber lighting.When the unit is on,the lighting around the button is blue.2 Surround Mode Group Selector: Press this but-ton to select the top-level group of surround modes.Each press of the button will select one of the sur-round mode categories. Once the button is pressed sothat the n

26、ame of the desired surround mode categoryappears in the on-screen display and in the LowerDisplay Line $, press the Surround ModeSelector 3 to cycle through the individual modesavailable. For example, press this button to selectDolby modes, and then press the Surround ModeSelector 3 to choose from t

27、he various modeoptions.3 Surround Mode Selector: Press this button to select from among the available surround modeoptions for the surround mode category selected.The specific modes will vary based on the number ofspeakers available, the surround mode category andwhether the input source is digital

28、or analog. Forexample, press the Surround Mode Group Selector2 to select a category such as Dolby or Logic 7,and then press this button to see the specific modechoices that are available. For more information onmode selection, see page 35.4 Tuning Selector: Press the left side of the buttonto tune l

29、ower-frequency stations and the right side ofthe button to tune higher-frequency stations.When the tuner is in the MANUAL/MONO mode,each tap of the selector will increase or decrease thefrequency by one increment.When the tuner receivesa strong-enough signal for adequate reception,MANUAL TUNED will

30、appear in the LowerDisplay Line $ and in the on-screen display.Whenthe tuner is in the AUTO/STEREO mode,press the button once, and the tuner will scan for astation with acceptable signal strength.When the nexthigher- or lower-frequency station with a strong-enough signal is tuned, the frequency scan

31、 will stopand the Lower Display Line $ and the on-screendisplay will indicate AUTO TUNED.When an FMStereo station is tuned, the display will read AUTOST TUNED. See page 39 for more informationon using the tuner.5 Tuner Band Selector: Pressing this button willswitch to the Tuner mode. Pressing it aga

32、in will switchbetween the AM and FM frequency bands. (See page39 for more information on the tuner.)6 Preset Stations Selector: Press this button toscroll up or down through the list of stations that havebeen entered into the preset memory. (See page 39for more information on tuner programming.)7 In

33、put Source Selector: Press this button tochange the input by scrolling up or down through thelist of input sources.8 Tuner Mode Selector: Press this button to selectAuto or Manual tuning.When the button is pressed sothat AUTO/STEREO appears in the UpperDisplay Line #, the tuner will search for the n

34、extstation with an acceptable signal when the TuningSelector 5wis pressed.When the button is pressed so that MANUAL/MONO appears in the Upper Display Line #, each press of theTuning Selector 5wwill increase the fre-quency. (See page 39 for more information on usingthe tuner.) This button may also be

35、 used to switchbetween Stereo and Mono modes for FM radio recep-tion.When weak reception is encountered, select theMANUAL/MONO tuning mode. Press and holdagain to switch back to AUTO/STEREOmode. (See page 39 for more information on usingthe tuner.)9 Front-Panel Control Door: To open the door sothat

36、the front-panel jacks and controls behind this doormay be accessed, gently push the door down andtoward you, using either lower corner of the door.) Volume Control: Turn this knob clockwise toincrease the volume, counterclockwise to decrease thevolume. If the AVR 7300 is muted, adjusting the vol-ume

37、 control will automatically release the unit from thesilenced condition.! Input Indicators: One of these indicators will lightto identify the currently selected input. Note that theentire list will light briefly each time the unit is turnedon, as a test. Speaker/Channel Input Indicators: These indi-

38、cators are multipurpose, indicating both the speakertype selected for each channel and the number ofaudio channels available.The speaker indicators lightas a single outline around the speaker position indica-tor when a “small” speaker is selected and as a largericon with three connected boxes when “

39、large” speak-ers are selected.When only the speaker position let-ters appear, no speaker has been assigned to thatposition. (See page 26 for more information on con-figuring speakers.) The letters inside each box alsoindicate the active input channels. For standard analoginputs, only the L and R wil

40、l light, indicating a stereoinput. For a digital source, the indicators will light todisplay the channels being received at the digital input.When the letters flash, the digital input has been inter-rupted and an UNLOCK message may appear inthe Lower Display Line $. (See page 38 for moreinformation

41、on the Channel Indicators.)# Upper Display Line: Depending on the unitsstatus, a variety of messages will appear here. In normal operation, this line will show the current inputsource and identify whether an analog or digital inputis in use.When the tuner is selected as the input, thisline will iden

42、tify the station as AM or FM and show thefrequency and preset number, if any.$ Lower Display Line: Depending on the unitsstatus, a variety of messages will appear here. In nor-mal operation, the current surround mode will appearon this line.% Surround Mode Indicators: One of these indicators will li

43、ght to show the surround mode in use. Depending on the specific combination of inputsources and surround mode selected, more than one indicator may light. (See page 35 for more information.) Remote Sensor Window: The sensor behindthis window receives infrared signals from the remotecontrol.Aim the r

44、emote at this area and do not blockor cover it unless an external remote sensor isinstalled.1AVR7300(120v)-OM 6/14/04 9:15 AM Page 6AVR7300 harman/kardonAVR7300 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoFRONT-PANEL CONTROLSFRONT-PANEL CONTROLS 7NOTE: To make it easi

45、er to follow the instructions that refer to this illustration, a larger copy may be downloaded from the Product Support section for this product at .The following controls and jacks are located behind the front-panel door.To open the door, place the edge of a finger on the left or right bottom edge

46、of the panel and gentlyswing the door down toward you.Main Power Switch: Press this switch toapply power to the AVR 7300.When the switch ispressed in, the unit is placed in a Standby mode, asindicated by the lighting around the Standby/OnButton 1 turning amber.The switch MUST bepressed in to operate

47、 the unit.To turn the unit off andprevent the use of the remote control, this switchshould be pressed until it pops out from the frontpanel so that the word “OFF” may be read at the topof the switch.NOTE: This switch is normally left in the “ON” position.Headphone Jack: This jack may be used toliste

48、n to the AVR 7300s output through a pair ofheadphones. Be certain that the headphones have astandard 1/4 stereo phone plug, or that you use anadapter, as needed, to convert the plug on your head-phones to the 1/4 jack used on the AVR.When theheadphone jack is in use, the main room speakers willautom

49、atically be turned off and the unit will output astandard stereo signal.You may also use one of theDolby Headphone modes for an enhanced listeningexperience. For more information on headphone lis-tening, see page 35.Tone Mode Button: This button controls thetone mode settings, enabling adjustment of

50、 the bassand treble boost/cut.You may also use it to take thetone controls out of the signal path completely for“flat” response.The first press of the button displays aTONE MODE message in the Lower DisplayLine $ and in the on-screen display.To take thecontrols out of the signal path, press either o