HarmanKardon-AVR120-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR120 AVR120 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 FRONT PANEL DISPLAY.7 REAR PANEL CONNECTIONS.9 REMOTE CONTROL FUNCTIONS.11 TROUBLESHOOTING GUIDE.14 PROCESSOR RESET.14 BULLETIN HK2003-07.15 T

2、ECH TIP HKTT2003-01.17 EXPLODED VIEW.18 EXPLODED VIEW PARTS LIST.19 BLOCK DIAGRAM.20 ELECTRICAL PARTS LIST.21 PCB DRAWINGS.54 SEMICONDUCTOR PINOUTS57 SCHEMATICS.100 PACKING.118 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev3 6/2005 www.freeservicemanuals.infoIts Freewww.free

3、servicemanuals.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 replacement parts designated, or parts with the

4、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

5、(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

6、 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 commerc

7、ially 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 electrostat

8、ic 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 n

9、ot 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 t

10、ogether 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 a

11、pplied 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

12、electricity sufficient to damage an ES devices.CAUTION :AVR120 AVR120 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoRadioFans.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 me

13、talpartsintheunit.2. Be sure that any protective devices such asnonmetallic control knobs, insulating fish-papers,cabinetbacks,adjustmentandcompartment covers or shields, isolationresistor-capacitynetworks,mechanicalinsulators, etc. Which were removed for theservicingareproperlyre-installed.Before r

14、eturning the unit to the user, perform the following safety checks :3. Be sure that no shock hazard exists ; check for leakagecurrentusingSimpsonModel229LeakageTester,standardequipment item No. 21641, RCA Model WT540A or usealternate method asfollows : Plug the power cord directlyInto a 120 volt AC

15、receptacle (do not use an IsolationTransformer for this test). Using two clip leads, connect a1500ohms,10wattResistorparalleledbya0.15uFcapacitor,inserieswithallexposedmetalcabinetpartsandaknownearthground,suchas a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivi

16、ty to measure the AC voltage drop across theresistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal,cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbeperfor

17、medwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.AVR120 AVR120 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info34 TECHNICAL SPECIFICATIONSTechnical SpecificationsAudio SectionStereo Mode Continuous

18、 Average Power (FTC)50 Watts per channel, 0.07% THD, 20Hz 20kHz,both channels driven into 8 ohmsFive-Channel Surround Modes Power Per Individual ChannelFront L&R channels:40 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:40 Watts 0.07% THD, 20Hz20kHz into 8 ohmsSurround channels:40

19、 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 Channel SeparationPro Logic II 45dBDolby Digital (AC-3)55dBDTS55dBFrequency Response 1W (+0dB, 3dB)10Hz100kHzHigh Instantaneous Cur

20、rent Capability (HCC)25 AmpsTransient Intermodulation Distortion (TIM)UnmeasurableSlew Rate40V/secFM Tuner SectionFrequency Range87.5108.0MHzUsable SensitivityIHF 1.3V/13.2dBfSignal-to-Noise RatioMono/Stereo 70dB/68dBDistortionMono/Stereo 0.2%/0.3%Stereo Separation40dB 1kHzSelectivity400kHz, 70dBIma

21、ge Rejection80dBIF Rejection90dBAM Tuner SectionFrequency Range5201710kHzSignal-to-Noise Ratio45dBUsable SensitivityLoop 500VDistortion1kHz, 50% Mod 0.8%Selectivity10kHz, 30dBVideo SectionTelevision FormatNTSCInput Level/Impedance1Vp-p/75 ohmsOutput Level/Impedance 1Vp-p/75 ohmsVideo Frequency Respo

22、nse10Hz8MHz (3dB)GeneralPower RequirementAC 120V/60HzPower Consumption68W idle, 540W maximum (2 channels driven)Dimensions Width17.3 inches (440mm)Height6.5 inches (165mm)Depth17.1 inches (435mm)Weight31 lb (14.1kg)Depth measurement includes knobs, buttons and terminal connections.Height measurement

23、 includes feet and chassis.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.*Manufactured under license from Dolby Laboratories.Dolby, Pro Logic II,AC-3 and the Doub

24、le-D symbol aretrademarks of Dolby Laboratories. Confidential UnpublishedWorks. 19921999 Dolby Laboratories, Inc.All rights reserved.DTS and DTS Surround are registered trademarks of Digital Theater Systems, Inc.UltraStereo is a trademark of UltraStereo Corp.VMAx is a registered trademark of Harman

25、International Industries, Inc., and is an implementation of Cooper Bauck Transaural Stereo under patent license.Logic 7 is a registered trademark of Lexicon, Inc., a Harman International Company.Crystal is a registered trademark of Cirrus Logic Corp.AVR120 AVR120 harman/kardon www.freeservicemanuals

26、.infoIts Freewww.freeservicemanuals.info5 FRONT PANEL CONTROLS1 Main Power Switch: Press this button toapply power to the AVR 120.When the switchis pressed in, the unit is placed in a Standbymode, as indicated by the amber LED 3 sur-rounding the System Power Control 2.This button MUST be pressed in

27、to operate theunit.To turn the unit off and prevent the useof the remote control, this switch should bepressed until it pops out from the front panelso that the word “OFF” may be read at thetop of the switch.NOTE: This switch is normally left in the “ON”position.2 System Power Control: When the Main

28、Power Switch 1 is “ON,” press this buttonto turn on the AVR 120; 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 illumi-nated in amber when the unit is in the Standbymode to signal that t

29、he unit is ready to beturned on.When the unit is in operation, theindicator will turn green. Should the indicatorturn red, turn the unit off using the MainPower Switch 1 and check the speaker wireconnections to make certain that there are noshort circuits.4 Headphone Jack:This jack may be used tolis

30、ten to the AVR 120s 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 the headphone jack is in use.5 Selector Buttons:When you are establish-ing the AVR 120s configuration sett

31、ings,usethese buttons to select from the choices available,as shown in the Main Information Display .6 Tone Mode: Pressing this button enablesor disables the Bass and Treble tone controls.When the button is pressed so that the wordsTONE IN appear in the Main InformationDisplay , the settings of the

32、Bass & andTreble ( controls 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 bass or treble alter-ation, no matter how the actual Bass andTreble Controls &( are adjusted.

33、7 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 22 for moreinformation about surround modes.)Front Panel Controls1 Main Power Switch2 Syste

34、m Power Control3 Power Indicator4 Headphone Jack5 Selector Buttons6 Tone Mode7 Surround Mode Selector8 Tuning Selector9 Tuner Band Selector) Preset Stations Selector! Input Source Selector FM Mode Selector# Digital Optical 3 Input$ Digital Coax 3 Input% Video 4 Video Input Jacks Video 4 Audio Input

35、Jacks& Bass Control* Balance Control( Treble Control Volume Control Set Button Input Indicators Delay Digital Input Selector Main Information Display Channel Select Button Speaker Select Button Test Tone Selector Surround Mode Indicators Remote Sensor Window413789)!#$%*&(2926305AVR 120AVR120 AVR120

36、harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info6 FRONT PANEL CONTROLSFront Panel Controls8 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 sig

37、nal is reached, the TUNED Indicator Q will be illuminated in the Main Information Display .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

38、frequency band.Release it once the fast tuning starts; the tunerwill automatically scan for the next station withan acceptable signal and then stop.9 Tuner Band Selector: Pressing this buttonwill automatically switch the AVR 120 to theTuner mode. Pressing it again will switchbetween the AM and FM fr

39、equency bands. (Seepage 25 for more information on the tuner.) Preset Stations Selector: Press this button to scroll up or down through the list orstations that have been entered into the presetmemory. (See page 26 for more information ontuner presets.)! Input Source Selector: Press this buttonto ch

40、ange the input by scrolling up or downthrough the list of input sources. FM Mode Selector: Press this button toselect Auto or Manual tuning.When the buttonis pressed so that the AUTO Indicator Rlights, the tuner will search for the next stationwith an acceptable signal when the TuningSelector 8u is

41、pressed.When the button ispressed so that the AUTO Indicator R is notlit, each press of the Tuning Selector 8uwill increase the frequency.This button may alsobe used to switch between Stereo and Monomodes for FM radio reception.When weakreception is encountered, press the button untilthe STEREO Indi

42、cator P goes out to switchto Mono reception. Press and hold again toswitch back to STEREO mode. (See page 25 formore information on using the tuner.)# 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

43、 the plastic cap installed to avoid dustcontamination that might degrade future performance.$ Digital Coax 3 Input: This jack is used forconnection to the output of portable audiodevices, video game consoles or other productsthat have a coax digital jack.% Video 4 Video Input Jacks: These jacksmay b

44、e used for temporary connection to thecomposite or S-Video output of video games,camcorders or other portable video products. Video 4 Audio Input Jacks: These audiojacks may be used for temporary connection tovideo games or portable audio/video productssuch as camcorders and portable audio players.&

45、 Bass Control:Turn this control to modifythe low-frequency output of the left/right chan-nels by as much as 10dB,when the unit is inthe “Surround Off”mode.Set this control to asuitable position for your taste or room acoustics.* Balance Control: Turn this control tochange the relative volume for the

46、 frontleft/right channels.NOTE: For proper operation of the surroundmodes this control should be at the midpoint or “12 oclock” position.(Treble Control:Turn this control to modifythe high frequency output of the left/right chan-nels by as much as 10dB,when the unit is inthe “Surround Off”mode.Set t

47、his control to asuitable position for your taste or room acoustics. Volume Control: Turn this knob clockwiseto increase the volume, counterclockwise todecrease the volume. If the AVR 120 is muted,adjusting the Volume Control willautomatically release the unit from the silencedcondition. Set Button:W

48、hen making choices duringthe setup and configuration process, press thisbutton to enter the desired setting as shown in the Main Information Display into the AVR 120s memory.The set button may also be used to change the display brightness.(See page 26.) Input Indicators: A green LED will light infro

49、nt of the input that is currently being used asthe source for the AVR 120. Delay: Press this button to begin thesequence of steps required to enter delay timesettings. (See page 19 for more information ondelay times.) Digital Input Selector: When playing asource that has a digital output, press this

50、 button to select between the Optical #dand Coaxial $e Digital inputs. (See pages2325 for more information on digital audio.) Main Information Display: This displaydelivers messages and status indications tohelp you operate the receiver. (See pages 78for a complete explanation of the InformationDisp