HarmanKardon-AVR300-avr-sm维修电路原理图.pdf

harman/kardon AVR300A/V DOLBY DIGITAL RECEIVERSERVICE MANUALCONTENTSSPECIFICATIONS.2ESD WARNING. .4LEAKAGE TESTING.5CONTROLS AND FUNCTIONS. .6SERVICE PROCEDURE.9ALIGNMENT PROCEDURE. .9IDLE CURRENT/DC OFFSET.10ALIGNMENT/TEST POINTS. 11CIRCUIT DESCRIPTION. 13BLOCK DIAGRAM 16BULLETIN HK2000-05. 17BULLETIN HK2000-02 Rev1.18DISASSEMBLY PROCEDURE.21UNIT EXPLODED VIEW.22MECHANICAL PARTS LIST.23PCB DRAWINGS25ELECTRICAL PARTS LIST.30INTEGRATED CIRCUIT DRAWINGS.52SCHEMATICS.80SEMICONDUCTOR PINOUTS.89WIRING DIAGRAM.90PACKAGE.91harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797Rev0 6/2002RadioFans.CN 收音机爱 好者资料库RadioFans.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 :- 4 -3001. lnspect all lead dress to make certain thatleads are not pinched or that hardware is notlodged between the chassis and other metalpartsintheunit.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 returning 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 as follows : Plug the power cord directlyInto a 120 volt AC 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 sensitivity 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, beperformedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.- 5 -300?SERVICE PROCEDURETEST EQUIPMENT REQUIRED1) AM/FM Signal generator2) Digital Multimeter3) Distortion lever meter2. VFD segment illumination & textThis set do not have VFD segment check function because lack of u-com memory sizeSo For your checking VFD states according to each functionPlease refer to owners manual process.1. All ClearThis service program can clear all memorized operations and functions.When the POWER ON, press the AM/FM button while pressing the PRO LOGICbutton.After this, Preset memory will be set to these frequencies.FMAMVERSION120230RDSVERSION120230RDSP187.587.50P9520522P288.088.00P10600594P390.090.00P11610999P495.095.00P1210001395P598.098.00P1314001611P699.099.00P141500P7106.0106.00P151710P8108.0108.00ALIGNMENT PROCEDURES1. FM MONO. Distortion adjustmentstep12Input Signal SourceConnectionSignal generatoroutput to FMantennaterminal.(750hm)SignalFrequency98MHzSource Signal Output Level andModulation1000uV/m (60dBu)MONO 1kHz/Dev. 75kHzReceptionFrequency98MHz(P5)AdjustmentPointT804T805AdjustmentValue0mV0.5mV(R831)DistortionlevelatTAPE-OUTMinimum4. FM STEREO Separation Adjustmentstep12Input Signal SourceConnectionSignal generatoroutput to FMantennaterminal.(750hm)SignalFrequency98MHzSource Signal Output Level andModulationsame specification asdistortion adjustment.Input only L channelFM STEREOsame specification asdistortion adjustment.Input only R channelFM STEREOReceptionFrequency98MHz(P5)98MHz(P5)AdjustmentPointVR803VR803AdjustmentValueOutput levelat TAPE-OUTchannel RMinimumOutput levelat TAPE-OUTchannel RMinimum2. FM MUTING LEVEL ADJUSTMENTTurn variable resistor VR801 and stop at position TUNED is not shown (not indicated), then again turn the variable resistor VR801 to theopposite revolution and stop at a position TUNED is shown.step12Input Signal SourceConnectionSignal generatoroutput to FMantennaterminal.(750hm)SignalFrequency98MHzSource Signal Output Level andModulation10uV/m (20dBu)MONO 1kHz/Dev. 75kHzReceptionFrequency98MHz(P5)AUTOSCANAdjustmentPointVR801Only confirmAdjustmentValueTUNEDindicate on VFDTUNEDindicate on VFD- 9 -2stepInput Signal SourceConnectionSignalFrequencySource Signal Output Level andModulationReceptionFrequencyAdjustmentPointAdjustmentValue11395kHz(230,230RDS)1400kHz(120)CT8015. AM-Tracking Adjustment (MW)Signal Generatoroutput to transmissionloop antenna(standard required loop)5mV/m(74dBu)400HzMOD.30%594kHz(230,230RDS)600kHz(120)594kHz(230,230RDS)600kHz(120)T801Output level(L or R)atTAPE-OUTMinimumOutput level(L or R)atTAPE-OUTMinimum6. AM IF AdjustmentstepInput Signal SourceConnectionSignalFrequencySource Signal Output Level andModulationReceptionFrequencyAdjustmentPointAdjustmentValueT803Output level(L or R)atTAPE-OUTMaximumSignal Generatoroutput to transmissionloop antenna(standard required loop)5mV/m(74dBu)400HzMOD.30%999kHz(230,230RDS)1000kHz(120)999kHz(230,230RDS)1000kHz(120)Output level(L or R)atTAPE-OUTMaximum1stepInput Signal SourceConnectionSignalFrequencySource Signal Output Level andModulationReceptionFrequencyAdjustmentPointAdjustmentValue1522kHz(230,230RDS)520kHz(120)5mV/m(74dBu)400HzMOD.30%Signal Generatoroutput to transmissionloop antenna(standard required loop)522kHz(230,230RDS)520kHz(120)(P9)T8021.1V1.2V4. AM OSC Adujstment3002stepInput Signal SourceConnectionSignalFrequencySource Signal Output Level andModulationReceptionFrequencyAdjustmentPointAdjustmentValue17. AM auto stop AdjustmentSignal Generatoroutput to transmissionloop antenna(standard required loop)1000uV/m(60dBu)400HzMOD.30%AUTO SCANTUNEDindicate onVFD999kHz(230,230RDS)1000kHz(120)999kHz(230,230RDS)1000kHz(120)OnlyConfirmVR802TUNEDindicate onVFD8. Main Amp ldling current Adjustment(4) CAUTIONshould be adjusted again* FRONT AMP: Q433Q440* CENTER AMP: Q517Q520* SURROUND AMP: Q633Q6401) In case that POWER TR or DREVE TR is needed to be replaced for repairing, the corresponding channel(1) SET CONDITION1) SEMI VOLUME POSITION at MAIN/SURROUND AMP Board; CENTERMAIN: VR401, VR402, VR501SURROUND : VR601, VR6022) NO signal / NO LOAD3) AC LINE VOLTAGE : 120V/60Hz, 230V/50Hz(2) After turning on the unit, keep it over than 5MIN. (Keep the Power/Drive TR as normal temperature)(3) Adjust the voltage value of primary & secondary of wafer to be 10mV by rotating the semi-volumeof each channel to the rightR401:22.7mAR472:22.7mAR501:22.7mAR601:22.7mAR602:22.7mAFRONT-L chFRONT-R chCENTER chSURROUND-L chSURROUND-R chVR401VR402VR501VR601VR602WA401WA402WA501WA601WA602CHANNELADJUSTMENTMEASUREMENTOTHERS- 10 -103mV103mV103mV103mV103mVVOLAGE9. Main Amp DC OFFSET VOLTAGE Adjustment(4) CAUTIONshould be adjusted again* FRONT AMP: Q401Q440, Q411Q414* CENTER AMP: Q501, Q502, Q506, Q507* SURROUND AMP: Q601Q604, Q611Q6141) In case that POWER TR or DREVE TR is needed to be replaced for repairing, the corresponding channel(1) SET CONDITION1) SEMI VOLUME POSITION at MAIN/SURROUND AMP Board; CENTERMAIN: VR403, VR404, VR502SURROUND : VR603, VR6042) NO signal / NO LOAD3) AC LINE VOLTAGE : 120V/60Hz, 230V/50Hz(2) After turning on the unit, keep it over than 5MIN. (Keep the Power/Drive TR as normal temperature)(3) Adjust the voltage value of primary & secondary of wafer to be 10mV by rotating the semi-volumeof each channel to the rightFRONT-L chFRONT-R chCENTER chSURROUND-L chSURROUND-R chVR403VR404VR502VR603Vr604JK401JK402JK501JK601JK601CHANNELADJUSTMENTMEASUREMENTOTHERS0mV0mV0mV0mV0mVVOLAGE10. Cautions for main Amp adjustment(1) At MAIN/SURROUND BOARD, use the below condensors after discharging for sufficent timefor preventing possible damage from electrical spark.(2) The checker for MAIN/SURROUND BOARD should have the discharging circuit.Discharge over 30sec. through (407ohm 10w) resistor after turning offMAIN BOARDC481, C482 (10000/63V, 8200uF/63V)SURROUND BOARDC691, C692 (6800/63V, 6800uF/50V)30012harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400harman/kardon Service BulletinService bulletin # H/K2000-05 May 2000Warranty labor rate: MAJOR repairTo: All harman/kardon Service CentersModels: AVR300, AVR500Subject: Volume Level ChangesOn early versions of the AVR300 or AVR500 the volume level may change by itself, or when the volume knobis tapped. This may happen on an occasional random basis and depends on where the volume control knob ispositioned after a volume adjustment. During a running production change, new volume encoders wereinstalled.In the event you receive an AVR300 or AVR500 with the complaint “The volume on my receiverchanges by itself”, perform the following procedure:REPLACE VR901 VOLUME ENCODER1) Remove the top cover, (14) Black Phillips screws.2) Remove the (11) Black Phillips screws holding the plastic front panel to the chassis.3) Remove the single Phillips screw on both right & left side of the chassis with a dual black ground wire.4) Remove the volume, bass, treble and balance knobs by pulling them straight off.5) Remove the single nut holding the volume encoder to the front panel.6) Pull the loaded front panel off the chassis; cut any plastic cable ties necessary to fully disengage it7) Lift and set the receiver on its right side for the remainder of the procedure.8) Remove molex connector CN983 at the power switch; see Figure 1.9) Pull the front panel as far away as the remaining connecting wires will allow.10) Unsolder the connections at the rear of the front PCB to the volume encoder.11) Using a “stubby” Phillips screwdriver, remove the (19) Black Phillips screws holding the front PCB to thefront panel; two plated screws at the rear of the headphone jack also must be removed.12) Pull the front PCB away from the front panel.13) Remove and replace the volume encoder with h/k part# J32612050102; resolder the new encoder in place.14) Replace the front PCB and reassemble the receiver in reverse order, following the instructions above.Replace all cable ties that were cut, and reattach any connectors that were unplugged. Make sure the twoground wires on both sides of the receiver are reattached.15) Power up receiver, and test volume control to assure it no longer changes settings by itself, or when thevolume knob is tapped.17harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400harman/kardon Service BulletinService bulletin # H/K2000-02 Rev1 January 2001Warranty labor rate: MAJOR repairTo: All harman/kardon Service CentersModels: AVR300, AVR500Subject: Random Noise, Erratic Output in DTS ModeIn the event you receive an AVR300 or AVR500 receiver with the complaint “there is distortion, randomnoise or gaps in the program material when in the DTS mode”, perform the following procedure:REMOVAL AND MODIFICATION OF THE DSP BOARD1) Remove the top cover, (14) Black Phillips screws.2) Locate the DSP PC Board; Figure 1. Remove the two metal braces at the top of the unit. If necessary, cutthe cable ties attached to the braces to move any wires away from the area.3) Pull the white 22 conductor ribbon cable at the rear of the DSP PC Board straight out of its receptacle.4) Unplug the white 5 conductor molex cable at the top of the DSP PC Board.5) Remove the (33) plated Phillips screws on the left side of the rear backplate; see Figure 2. Do not removeany additional screws on the right side. If using a power tool, use care and minimum effort to avoid damagingthe various plastic receptacles.6) Remove all three black plastic plugs that cover the optical inputs at the rear of the DSP PC Board.7) Pull on the left side of the rear backplate, away from the receiver chassis; you should be able to pull it awayenough to allow the DSP PC Board to be pulled straight up and out of the receiver.8) Proceed with the modifications on page 2.ModelSerial Number120VSerial Number230V RDSSTATUSACTIONAVR300AVR500TH0001-01000ToTH0001-13886TH0002-01000ToTH0002-10460TH0005-01000ToTH0005-03317TH0006-01000ToTH0006-02795Random Noise, ErraticOutput or Gaps in ProgramMaterial when in DTS ModeModifications to DSP Board:Add ground wire;Change R756 & R755from 600? resistor or Capacitor to 33? resistorAVR300AVR500TH0001-13887Or higherTH0002-10461Or higherTH0005-03318Or higherTH0006-02796Or higherModified by factoryNONE REQUIRED18harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400Models: AVR300, AVR500 Subject: Rando