HarmanKardon-3490-rec-sm维修电路原理图.pdf

harman/kardon Service Manual HK 3490/230 2 x 120W STEREO RECEIVER CONTENTS LEAKAGE CHECK 2 ESD WARNING 3 TECHNICAL SPECIFICATIONS 4 TROUBLESHOOTING GUIDE 5 FRONT PANEL CONTROLS 6 REAR PANEL CONNECTIONS 7 PACKAGE LIST AND PARTS 8 DISASSEMBLY 9 EXPLODED VIEW AND PARTS 13 ELECTRICAL PARTS LIST 14 SEMICONDUCTOR PINOUTS 34 PCB DRAWINGS 58 BLOCK DIAGRAM 64 WIRING DIAGRAM 65 AMP BIAS ADJUSTMENT 66 SCHEMATIC DIAGRAMS 67 Released EU2008 harman/kardon, Inc. Rev 0, 09/2008 250 Crossways Park Dr. Woodbury, New York, 11797 harman/kardonHK 3490/230 Service ManualPage 1 of 70RadioFans.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 current 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.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 TestLeakagecurrenttesterReading shouldnot be above0.5mAEarthgroundharman/kardonHK 3490/230 Service ManualPage 2 of 70RadioFans.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 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 (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 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 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 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. 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 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 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. 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 :harman/kardonHK 3490/230 Service ManualPage 3 of 702Technical Specifications18 TECHNICAL SPECIFICATIONSAudio SectionStereo Mode Continuous Average Power (FTC)HK 3490: 120 Watts per channel, 20Hz20kHz 0.07% THD, both channels driven into 8 ohmsHK 3390: 80 Watts per channel, 20Hz20kHz 80dBIF Rejection100dBAM Tuner SectionFrequency Range5221620kHzSignal-to-Noise Ratio40dBUsable SensitivityLoop: 500V/MDistortion1kHz, 50% Mod: 0.8%Europe:9kHzVideo SectionTelevision SystemNTSC/PAL/SECAMSignal FormatCompositeInput Level1Vp-pInput Impedance75 ohms, unbalancedSync PolarityNegativeOutput Level1Vp-pOutput Impedance75 ohms, unbalancedVideo Frequency Response10Hz 10MHzGeneralPower RequirementAC 230V/50HzPower ConsumptionHK 3490: 3W standby, 310W maximum(both channels driven)HK 3390: 3W standby, 230W maximum(both channels driven)Dimension (Max)Width440mmHeight165mmDepth382mmWeightHK 3490: 10.4kgHK 3390: 9.5kgDepth measurement includes knobs, buttons and terminal connections. Height measurement includes feet 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.os0015CSK - HK 3390+3490 UK v8c.qxp:18223_HK3480 eng.qxp 13/03/08 13.38 Side 18 (Sort/Black plade)harman/kardonHK 3490/230 Service ManualPage 4 of 70Troubleshooting GuideTROUBLESHOOTING 17EnglishThis unit is designed for trouble-free operation. Most problems users encounter are due to operating errors. If you have a problem, first check this list for apossible solution. If the problem persists, consult your authorized Harman Kardon Service Center.If the problem is.Make sure that the.No lights appear when System Power2button Unit is plugged into a live outlet.is pressed No sound is heardUnit has not been muted.Correct input function selector button has been pressed.Volume is turned up.Speakers have been turned on using the Speaker Selectors67.No output from one or more channelsCables are not defective: check/replace speaker cables.Tuner sound has a large amount of interference, orAntenna is properly connected.the “Stereo” display is not illuminated, orAntenna is properly located.Tuner sound distorts and/or is noisyAntenna is set in the proper direction.Antenna is adequate to receive the desired station.Tuner is intermittent or continuously buzzing or hissingUnit is away from fluorescent lights, TVs, motors and other electrical appliances.Remote does not function correctly Batteries are not weak, and replace them if necessary.Correct device page has been selected by pressing the Source Selector key .Remote sensor is not obstructed, and remote is pointing directly at sensor at an angle of no more than 30 degrees. Also, check for fluorescent lighting, which may be interfering with the IR transmission.Cassette or CD sounds distorted Cassette deck or CD player has not been plugged into the Phono input. (Only use the outputs of a turntable or tonearm with the Phono input.)Turntable sounds distortedTurntable has been plugged into the Phono Input?,as the other inputs are not compatable with turntable signal levelsNo video imageVideo source units video ouput is properly connected, the source is turned on and the correctvideo input on the HK 3490/HK 3390 has been selectedVideo Monitor Output?is connected to a TV or video display, and that the TV is turnedon and the proper input on the TV has been selectedos0015CSK - HK 3390+3490 UK v8c.qxp:18223_HK3480 eng.qxp 13/03/08 13.38 Side 17 (Sort/Black plade)harman/kardonHK 3490/230 Service ManualPage 5 of 701Video 3 input jacks2System Power Control3Power Indicator4Headphone Jack5Mute6Speaker 1 Selector7Speaker 2 Selector8Phone Input Selector(The Bridge/Phono Input Selector HK 3490 only)9Tape Monitor Input Selector)Tuning Button!Video 1 Input SelectorPreset Scan#CD Input Selector$Video 2 Input Selector%Preset SelectorDSP Function Selector (HK 3490 only), Dimmer Switch (HK 3390 only).&FM/AM Selector*FM Mode Selector(Sleep ButtonBass ControlTreble ControlBalance ControlVolume ControlVideo 3 Input SelectorInformation DisplayRemote Sensor Window1Video 3 Input Jacks: These audio/videojacks may be used for temporary connection tovideo games or portable audio/video productssuch as camcorders and portable audio players. To select the front-panel inputs, press the Video3 Input Selector repeatedly until theInformation Display shows the text VIDEO F /ANALOG. When using the rear panel inputs,the Display shows VIDEO 3 / ANALOG.2System Power Control:When the MainPower Switch?is “ON,” press this button toturn on the HK 3490/HK 3390; press it again toturn the unit off (to Standby). Note that thePower Indicator3changes color from amberto white when the unit is on.3Power Indicator:This LED will illuminate inamber when the unit is in the Standby mode tosignal that the unit is ready to be turned on.When the unit is in operation, the indicator willturn white. A red indicator means that the unit isin the Protect mode, and should be turned offand then checked for a possible speaker wireshort circuit.4Headphone Jack:This jack may be used tolisten to the HK 3490/HK 3390s output througha pair of headphones. Be certain that the head-phones have a standard 6,3 mm stereo phoneplug.When a headphone is connected, theSpeakers 1 and Speakers 2 Selectors are inac-tive.5Mute: Press this button to momentarilysilence the speaker and preamp output of theHK 3490/HK 3390.6Speakers 1 Selector: Press this button toturn the speakers connected to the Speaker 1output terminals ?on or off.7Speakers 2 Selector: Press this button toturn the speakers connected to the Speaker 2output terminals ?on or off.89(7)#!$%&*34256666666666666666666666666666666666666666666666666666666662022252326242114 FRONT PANEL CONTROLSFront Panel Controlsos0015CSK - HK 3390+3490 UK v8c.qxp:18223_HK3480 eng.qxp 13/03/08 13.38 Side 4 (Sort/Black plade)harman/kardonHK 3490/230 Service ManualPage 6 of 706 REAR PANEL CONNECTIONSRear Panel ConnectionsONOFF?F? AM Antenna? FM Antenna? Phono Ground? Remote IR In? Remote IR Out? Phono Inputs? CD Inputs? Video 1 Audio/Video Play/In? Tape Monitor Play/In? Tape Monitor Record/Out? Video 1 Audio/Video Record/Out? Video 2 Audio/Video Inputs? Main In? Video 3 Audio/Video Inputs? Preamp Out? Subwoofer Out? Speaker 1 Terminals? Speaker 2 Terminals? Switched AC Outlet? Power Cable? Video Monitor Outputs? The Bridge Input (HK 3490 only)? Update Cable Input? Reset Switch? Coaxial Digital Audio Input (HK 3490 only)? Optical Digital Audio Input (HK 3490 only)? Subwoofer Trigger Outputs? Subwoofer Link On/Off Switches? Main On/Off Switchos0015CSK - HK 3390+3490 UK v8c.qxp:18223_HK3480 eng.qxp 13/03/08 13.38 Side 6 (Sort/Black plade)harman/kardonHK 3490/230 Service ManualPage 7 of 70harman/kardonHK 3490/230 Service ManualPage 8 of 70harman/kardonHK 3490/230 Service ManualPage 9 of 70HK 3490 DISASSEMBLY PROCEDURES TOP-CABINET(21) REMOVAL 1. Remove 13 screws(S1) and then remove the Top-cabinet. FRONT PANEL ASSY REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Disconnect the lead wire(BN22-11P) on the Potentiometer PCB (43-4) from connector(CN22) on the Input PCB(45). 3. Disconnect the lead wire(BN13-9P) on the Front PCB(43-1) from connector(CN13) on the Main PCB(44-1). 4. Disconnect the connector(CN87-19P) on the Front PCB(43-1) from connector(CN87) on the Main PCB(44-1). 5. Disconnect the lead wire(BN73-5P) on the Phone PCB(43-3) from connector(CN73) on the Main PCB(44-1). 6. Disconnect the lead wire(BN84-5P) on the Front input video PCB(43-6) from connector(CN84) on the Input PCB(45). 7. Remove 1 screw(S6) and then lead wire(JW98,JW99-1P) on the PCB(43-5, 43-3). 8. Remove 1 screw(S6) and then lead wire(JW97-1P) on the Power led PCB(43-2). 9. Remove 10 screws(S1) and then remove the Front Panel ASSY. Potentiometer PCB(43-4) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Remove 2 screws(S3) and then remove the Potentiometer PCB(43-4). PHONE PCB(43-3) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Remove 2 screws(S4) and then remove the Phone PCB(43-3). 4. Disconnect the lead wire(BN73-5P) from connector(CN73) on the PHONE PCB(43-3). Volume PCB(43-5) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Pull out the Volume Knob ASSY . 4. Remove 4 screws(S3) and then Volume PCB(43-5). 5. Disconnect the lead wire(BN81-5P) from connector(CN81) on the Volume PCB(43-5). POWER LED PCB(43-2) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Remove 2 screws(S3) and then remove the Power led PCB(43-2). 4. Disconnect the lead wire(BN82-5P) from connector(CN82) on the Power led PCB(43-2). Front input video PCB(43-6) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Remove 2 screws(S3) and then remove the Front input video PCB(43-6). harman/kardonHK 3490/230 Service ManualPage 10 of 70 FRONT PCB(43-1) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Remove the Front Panel ASSY, referring to the previous step. 3. Remove the Potentiometer PCB(43-4) , referring to the previous step. 4. Remove the PHONE PCB(43-3), referring to the previous step. 5. Remove the Volume PCB(43-5), referring to the previous step. 6. Remove the POWER LED PCB(43-2), referring to the previous step. 7. Remove the Front input video PCB(43-6), referring to the previous step. 8. Remove 12 screws(S3) and then remove the Front PCB(43-1). TUNER MODULE(34) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Disconnect the connector(CON1-Card cable) from connector(CN26) on the Input PCB(45). 3. Remove 2 screws(S5) and then remove the Tuner Module(47). VIDEO PCB(43-8) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Disconnect the connector(CN85-Card cable) from connector(CN85) on the Input PCB(45). 3. Remove 4 screws(S8,S5) and then remove the Video PCB(43). DSP PCB(46-1) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Disconnect the connector(CN51,52,71-Card cable) from connector(CN51,52,71) on the Input PCB(45). 3.Disconnect the connector (CN51) from lead wire(BN51-11P) on the Tr PCB(46-2). 4. Remove 5 screws(S8,S5,S14) and then remove the DSP PCB(46-1). INPUT PCB(46-1) REMOVAL 1. Remove the Top-cabinet, referring to the previous step. 2. Disconnect the connector(CN21-Card cable)