HarmanKardon-AVR235-avr-sm维修电路原理图.pdf

《HarmanKardon-AVR235-avr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《HarmanKardon-AVR235-avr-sm维修电路原理图.pdf（122页珍藏版）》请在收音机爱好者资料库上搜索。

1、 harman/kardon AVR235 AVR235 7 X 50W 7.1 CHANNEL A/V RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 REAR PANEL CONNECTIONS.7 REMOTE CONTROL FUNCTIONS.10 CONNECTIONS.14 OPERATION.16 TROUBLESHOOTING GUIDE.23 PROCESSOR RESET.23 DISASSEMBLY

2、.24 UNIT EXPLODED VIEW.27 AMP BIAS ADJUSTMENT.28 TECH TIP HK2003-01.29 BLOCK DIAGRAM.30 ELECTRICAL PARTS LIST.31 SEMICONDUCTOR PINOUTS.68 PCB DRAWINGS.109 SCHEMATICS115 WIRING DIAGRAM.121 PACKAGING.122 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 4/2005 www.freeserviceman

3、uals.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 replacement parts desig

4、nated, 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 the product to the cus

5、tomer.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 chip components.The follo

6、wing 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 ground. Alternatively,

7、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 surface such as aluminum fo

8、il, 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 chargessufficient to

9、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 are packaged with lea

10、ds 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 device will be instal

11、led.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 foot from a carpeted f

12、loor can generate static electricity sufficient to damage an ES devices.CAUTION :AVR235 AVR235 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 continuedprotection of the customer and

13、 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, control shaft, etc.). Plu

14、g 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 THE APPLIANCETO THE CU

15、STOMER.DeviceundertestTest allexposed metalsurfacesAlso test withplug reversed(Using AC adapterplug as required)AC Leakage TestLeakagecurrenttesterReading shouldnot be above0.5mAEarthgroundAVR235 harman/kardonAVR235 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoTECHNICA

16、L SPECIFICATIONS 51Audio SectionStereo Mode Continuous Average Power (FTC)65 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohmsSeven-Channel Surround Modes Power per Individual ChannelFront L&R channels:50 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:50 Wat

17、ts 0.07% THD, 20Hz20kHz into 8 ohmsSurround (L & R side, L & R 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 I/II 40dBDolby Digital

18、 (AC-3)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 70/68dBD

19、istortionMono/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 Leve

20、l/Impedance1Vp-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 Consumption118W idle, 890W maximum (7 channels driven)Dimensions (Product)(Ship

21、ping)Width17.3 inches (440mm)21.5 inches (545mm)Height6.6 inches (168mm)9.9 inches (251mm)Depth15 inches (381mm)17.9 inches (455mm)Weight(Product)(Shipping)33.0 lb (15.0kg)35.2 lb (16kg)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 and Power for the Digital Revolution are registered trademarks of Harman International Industries, Incorporated.is a trademark of Harman International Industries, Incorporated (patent no. 5,386,478).*Manufactured under

23、license from Dolby Laboratories.“Dolby,”“Pro Logic” and the Double-D symbol are trademarks of Dolby Laboratories.DTS, DTS Surround, DTS-ES and DTS Neo:6 are registered trademarks of Digital Theater Systems, Inc.VMAx is a registered trademark of Harman International Industries, Incorporated, and is a

24、n implementation of Cooper Bauck Transaural Stereo under patent license.Logic 7 is a registered trademark of Harman International Industries, Incorporated.Cirrus and Cirrus Logic are registered trademarks of Cirrus Logic, Inc.TMAVR 235 TECHNICAL SPECIFICATIONSAVR 235 OM 8/27/04 4:17 PM Page 51AVR235

25、 harman/kardonAVR235 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoFRONT-PANEL CONTROLS1 Main Power Switch: Press this button to applypower to the AVR 235. When the switch is pressedin, the unit is in a Standby mode, as indicated by theamber Power Indicator 2 above the

26、Standby/OnSwitch 3. This button MUST be pressed in tooperate the unit. To turn the unit off and prevent theuse of the remote control, this switch should bepressed until it pops out from the front panel and theword “OFF” is seen at the top of the switch.NOTE: This switch is normally left in the “ON”

27、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.3 Standby/On Switch: When the Main PowerSwitch 1 is “ON,” press this button to turn on theAVR 235; press it again t

28、o turn the unit off.The PowerIndicator 3 turns blue when the unit is on.4 Headphone Jack: This jack may be used to listento the AVR 235s output through a pair of headphones.The speakers will automatically be turned off when theheadphone jack is in use.5 Tone Mode: Pressing this button enables or dis

29、-ables the Bass and Treble tone controls.When the but-ton is pressed so that TONE IN appears in theLower Display Line , the Bass and Treble controls may be used to adjust the output signals.When the button is pressed once or twice so that thewords TONE OUT appear in the Lower DisplayLine , the outpu

30、t signal will be “flat, ” no matter howthe actual Bass and Treble Controls areadjusted.6 Speaker Select Button: Press this button tobegin the process of configuring the unit to match thetype of speakers used in your listening room. (Seepages 16 and 2022 for more information on speakersetup and confi

31、guration.)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 Neo:6, Logic 7, DSP, Stereo).When the button is pressed so that the

32、 name of thedesired surround mode group appears in the on-screen display and in the Lower Display Line ,press the Surround Mode Selector 8 to cyclethrough the individual modes available. For example,press this button to select Dolby modes, and thenpress the Surround Mode Selector 8 to choosefrom the

33、 various mode options.1 Main 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 Stations Selector% Delay Adjust

34、 Selector Input Source Selector& Tuner Mode Selector * Optical 3 Digital Audio Input( Coaxial 3 Digital Audio Input Video 4 Video Input Jacks Video 4 Audio Input Jacks Bass Control Balance Control Treble Control Channel Adjust Selector Volume Control Input Indicators Speaker/Channel Input Indicators

35、 Upper Display Line Lower Display Line Surround Mode Indicators Remote Sensor Window1267#(*8)!)&%3459$DIGITALLOGIC 7VID 1DVDCDFMAMTAPE6 8 CHVID 2VID 3VID 4PRO LOGIC 3 STEREO DSP5 7 CH. STEREOSURR. OFFAVR 235FRONT-PANEL CONTROLSFRONT-PANEL CONTROLS 5 5NOTE: To make it easier to follow the instruction

36、s that refer to this illustration, a larger copy may be downloaded from the Product Support section for this productat .AVR 235 OM 8/27/04 4:16 PM Page 5AVR235 harman/kardonAVR235 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info8 Surround Mode Selector: Press this button

37、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 and if the input source isdigital or analog. For example, press the SurroundMode Group Selector 7 to select a mode groupingsuch as

38、Dolby or Logic 7, and then press this buttonto see the specific mode choices available. For moreinformation on mode selection, see page 26.9 Tuning Selector: Press the left side of the buttonto tune lower-frequency stations and the right side ofthe button to tune higher-frequency stations.When thetu

39、ner 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 display and the Lower Display Line.When the tuner is in the Auto mode, press the buttononce, and t

40、he 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 the Lower Display Linewill indicate AUTO TUNED.When an FM Stereo station is tuned, the display will read AUTO ST TUNED.To switch back

41、 and forth between the Auto andManual tuning modes, press the Tuner ModeSelector &.)/Buttons: When configuring the AVR 235ssettings,use these buttons to select from the availablechoices.! Tuner Band Selector: Press this button to turnthe AVR 235 on and to select the Tuner as the inputsource. Press i

42、t again to switch between the AM andFM frequency bands. (See page 29 for more informa-tion on the tuner.) Set Button: When making choices during thesetup and configuration process, press this button to enter the desired setting into the AVR 235s memory.# Digital Input Selector: Press this button tos

43、elect one of the digital inputs or the analog input forany source. (See pages 2629 for more informationon digital audio.)$ Preset Stations Selector: Press this button toscroll up or down through the list of stations that havebeen entered into the preset memory. (See page 30for more information on tu

44、ner presets.)% Delay Adjust Selector: Press this button tobegin the steps required to enter delay settings. (Seepage 22 for more information on delay times.) Input Source Selector: Press this button tochange the input by scrolling up or down through thelist of Input Indicators .& Tuner Mode Selector

45、: Press this button to selectAuto or Manual tuning.When the button is pressed sothat AUTO appears in the Lower Display Line ,the tuner will search for the next station with an accept-able signal when the Tuning Selector 9uis pressed.When the button is pressed so that MANUAL appears in the Lower Disp

46、lay Line ,each press of the Tuning Selector 9u will in-crease the frequency.This button may also be used toswitch between Stereo and Mono modes for FM radioreception.When weak reception is encountered, pressthe button so that MANUAL appears in the LowerDisplay Line and the on-screen display to switc

47、hto Mono reception. Press it again to switch back toStereo mode. (See page 29 for more information onusing the tuner.)* Optical 3 Digital Audio Input: Connect the opticaldigital audio output of an audio or video product to thisjack.When the input is not in use, be certain to keepthe plastic cap inst

48、alled to avoid dust contamination thatmight degrade future performance.( Coaxial 3 Digital Audio Input: This jack is usedfor connection to the output of portable audio devices,video game consoles or other products that have acoax digital audio jack. Video 4 Video Input Jacks: These jacks may be used

49、 for temporary connection to the composite orS-Video output of video games, camcorders or otherportable video products.You may make a connec-tion to either jack at any time, but not to both simultaneously. Video 4 Audio Input Jacks: These audio jacksmay be used for temporary connection to videogames

50、 or portable audio/video products such as cam-corders and portable audio players. Bass Control:Turn this control to modify the low-frequency output of the left/right channels by as much as 10dB. Balance Control: Turn this control to change therelative volume for the front left/right channels.NOTE: F