Yamaha-YSTSW320-sub-sm 维修电路原理图.pdf

YST-SW320YST-SW320SERVICE MANUALI CONTENTSTO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . .1SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1REAR PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . .34ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .56PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . .712BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .13SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . .14PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1522This manual has been provided for the use of authorized YAMAHARetailers and their service personnel.It has been assumed that basic service procedures inherent to the industry,and more specifically YAMAHA Products, are already known andunderstood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safetyprocedures when servicing this product may result inpersonal injury, destruction of expensive components,and failure of the product to perform as specified. Forthese reasons, we advise all YAMAHA product ownersthat any service required should be performed by anauthorized YAMAHA Retailer or the appointed servicerepresentative.IMPORTANT:The presentation or sale of this manual to any individualor firm does not constitute authorization, certificationor recognition of any applicable technicalcapabilities, or establish a principle-agent relationshipof any form.The data provided is believed to be accurate and applicable to the unit(s)indicated on the cover. The research, engineering, and service departmentsof YAMAHA are continually striving to improve YAMAHA products.Modifications are, therefore, inevitable and specifications are subject tochange without notice or obligation to retrofit. Should any discrepancyappear to exist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components.Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground bussin the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and partreplacement. Recheck all work before you apply powerto the unit.IMPORTANT NOTICE100720SERVICE MANUALYST-SW320SUBWOOFER SYSTEMRadioFans.CN 收音机爱 好者资料库YST-SW320YST-SW320I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedby 0.15F.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FORANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumesor expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food.1GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.ISPECIFICATIONSType . . . . . . . . . Advanced Yamaha Active Servo TechnologyDriver . . . . . . . . . . . 25 cm (9-13/16) cone woofer (JA25600)Magnetically shielded typeAmplifier Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250W/5Frequency Response . . . . . . . 20 Hz to 160 Hz (-24 dB/oct.)Power SupplyU, C models . . . . . . . . . . . . . . . . . . . . . . . . .AC120V, 60 HzA model . . . . . . . . . . . . . . . . . . . . . . . . . . . .AC240V, 50 HzB, G models . . . . . . . . . . . . . . . . . . . . . . . . .AC230V, 50 HzR, T models . . . . . . . . . . . .AC110/120/220/240V, 50/60 HzPower Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60WDimensions (W x H x D) . . . . . . . . . . . . 340 x 432 x 370 mm(13-3/8 x 17 x 14-9/16)Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 kg (37 lbs. 7 oz)FinishAll model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black colorR, T, G models . . . . . . . . . . . . . . . . . . . . . . . . Cherry colorAccessories . . . . . . . . . . . . . . . . . . . . . . . . . . Nonskid pad x 4* Specifications subject to change without notice.U . . . . . . . . . . USA modelC . . . . . .Canadian modelA . . . . . Australian modelB . . . . . . . . British modelG . . . . . European modelR . . . . . . . General modelT . . . . . . . . . China modelRadioFans.CN 收音机爱 好者资料库YST-SW320YST-SW320I REAR PANELM U, C modelsM A modelM B, G modelsM R modelM T model2R, T models onlyYST-SW320YST-SW320IDISASSEMBLY PROCEDURES(Remove parts in the order as numbered.)1. Removal of Front Panel AssyRemove 4 screws ( q ) and then remove the FrontPanel Assy in Fig. 1.*Use an Allen wrench (3mm) to unscrew the FrontPanel Assy.Fig. 2Fig. 1*When assembling the Rear Panel, check to ensure thatthe gasket is not damaged so as to prevent air leakagefrom occurring.Fig. 332. Removal of Loud Speakera. Remove 8 screws ( w ) and then remove the BaseAssy in Fig. 2.b. Remove 4 screws ( e ) and then remove the LoudSpeaker in Fig. 2.3. Removal of Rear Panel AssyRemove 12 screws ( r ) in Fig. 3.*Arrow marks ( ) are printed to identify the screws to beremoved.GInstallation of emblem1. Put the emblem into the cabinet at the specified posi-tion.2. Place a piece of cloth/wood on top of the emblem.3. Using a mallet, hammer the emblem in place throughthe cloth/wood.*Use special care not to cause damage to the emblem orcabinet while hammering the emblem.qqFront Panel AssyMain (5) P.C.B.wwwweeLoud SpeakerBase AssyrrrRear Panel AssyrYST-SW320YST-SW320Glue ListPlaceNameCord stopper5 minute epoxy or2051(Revertex Finewaters SDN.BHD.) orVYLOK 917DH (National Starch &Chemical (M) SDM.BHD.)Power switch5 minute epoxy or Diabond 1620B4370 (14-9/16)228340 (13-3/8)432 (17)340 (13-3/8)340 (13-3/8)(5/16)(7/8)GInstallation of power switchRapid cures bond (such as 5 minute epoxy) is required to fix the power switch.As shown in Fig. A, apply rapid cures bond (such as 5 minute epoxy) to the power switch (the area whichcontacts the rear panel), insert it in the rear panel and make sure it is fixed.(Inserting the power switch in the rear panel only would not be sufficient for its secure installation.)GPrecaution for installation of power cordAfter connecting the power cord, be sure to apply the rapid cures bond (such as 5 minute epoxy) to thecord stopper as shown in Fig. A,Bond application diagram (Fig. A)G DimensionsUnits : mm (inch)Apply rapid cures bondApply rapid cures bondYST-SW320YST-SW3205I ADJUSTMENTSGIdling AdjustmentTo stabilize operation of the amplifier, turn ON thepower with no input signal and wait for 1 or 2 minutesin non loaded condition before the adjustment.Adjust VR1 so that the voltage between terminalsTP11 and TP12 is DC 50mV to 250mV.Point A(Cathode of D29)V : 20V/divH : 2 msec/divDC range1 : 1 probe0VPoint B(Anode of D30)V : 20V/divH : 2 msec/divDC range1 : 1 probe0VGConfirmation of Power Amp operationFor the power amplifier which has been repaired, itis absolutely necessary to confirm that a correctwaveform is obtained at points indicated by A and Bin the schematic diagram according to the followingprocedure.Devices requiredSignal generator8 or 6 load resistorOscilloscope (dual trace type)Connection1) Connect the output signal from the signal generatorto the input terminal of YST-SW320.2) Disconnect the connector terminal connected to thespeaker unit and reconnect it to the load resistor.3) Connect the HOT side of the oscilloscope CH1 probeto the point A or B indicated in the figure and theGND side to the GND of the main unit.4) Connect the oscilloscope CH2 input to the red sideof the connector cable, which is connected with theload resistor.At this time, the GND terminal of CH2 must be leftunconnected.Setting1) Set the signal generator to the sine wave, 100Hz andminimum output level settings.2) Set the volume of YST-SW320 to the minimumposition.3) Turn on the power to YST-SW320.4) Adjust the output level of the signal generator and thevolume of YST-SW320 so that the output levelobserved at oscilloscope CH2 is 28Vp-p.Waveform observationWith the settings made as described above, observethe waveform obtained at CH1 for judgment.NormalNormalAbnormal+B or GND levelBecomes constantAbnormal-B or GND levelBecomes constantGConfirmation of AUTO STANDBYMeasuring ConditionR60 = 1M 1M/10kF = 100HzInput Level = 4mVLoad = OpenRatingAfter 2 to 8 sec.STANDBY(LED become red)Dont STANDBYRemarksVOLUME: MAXHIGH CUT: MAXAUTO STANDBY: LOWVOLUME: MAXHIGH CUT: MAXAUTO STANDBY: HIGHYST-SW320YST-SW3206IDLING CURRENT ADJ.DC 50mV to 250mVABREWHMain (1) P.C.BDC 50mV to 250mVTP11 (+)TP12 (-)VR1D30D29Point APoint BG Schematic DiagramG Test PointsABCDE1234567YST-SW320I PRINTED CIRCUIT BOARD (Foil side)781FROM : MAIN (2)REWHW19W20TO : SPEAKER+V1AYSTDROUTDR+B1E+B1REBLREW7W6W5TO : MAIN (6)FROM : MAIN (2)IDLING CURRENT ADJ.Q16CQ1CQ9Q1AQ17CQ17AQ16AMAIN ( 1 ) P. C. B. ABDC 50mV to 250mVIDLING TEST POINTABCDE1234567YST-SW320I PRINTED CIRCUIT BOARD (Foil side)89191BEBLBEW16W15W14TO : MAIN (6)TO : MAIN (1)DR+OUTDRAYST+V1#17W17TO : MAIN (3)VCCVCCEEPWS+V1#2W2FROM : MAIN (4)MA1ETOVL+1212LIMMA2FROM : MAIN (5)TVOLEMAIN+V2+1212PWSVCC+B1EB1#18W18TO : MAIN (1)MAIN ( 2 ) P. C. B. ABCDE1234567YST-SW320I PRINTED CIRCUIT BOARD (Foil side)98911MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B. FROM : MAIN (2)+V1PWSEEVCCVCCFROM : MAIN (4)SWLSWH2SWH1SOG R, T modelsW11GRW10BRTO : VOLTAGE SELECTORORW12GYW13TO : MAIN (8)W9BEGYBLORWHBEREW8RETO : POWER CORDTO : POWER TRANSFORMERTO : VOLTAGE SELECTORABCDE1234567YST-SW320I PRINTED CIRCUIT BOARD (Foil side)108191MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B. ORW12BE W9WH W8GYW13TO : MAIN (8)FROM : POWER CORDTO : POWER TRANSFORMERFROM : MAIN (2)+V1PWSEEVCCVCCFROM : MAIN (4)SWLSWH2SWH1SOG U, C, A, B, G modelsABCDE1234567YST-SW3209118BASSPHASEAUTOSTANDBYINPUT2RL+OUTPUTINPUT 1MA2LIM12+12TOVLEMA1TO : MAIN (2)#1W1SWLSWH2SWH1SOTO : MAIN (3)#4W4MAIN ( 4 ) P. C. B. R, T, B, G ONLY91FROM : MAIN (2)TOVLEMAIN+V2+1212PWSVCCVOLUMEHIGHCUTSATNDBY/ONMAIN ( 5 ) P. C. B. 11I PRINTED CIRCUIT BOARD (Foil side)ABCDE1234567YST-SW320W7W6W5W14W15W16FROM : POWER TRANSFORMERREBLREBEBLBETO : MAIN (2)TO : MAIN (1)MAIN ( 6 ) P. C. B. W12W13ORGYTO : MAIN (3)MAIN ( 8 ) P. C. B. POWER12I PRINTED CIRCUIT BOARD (Foil side)ABCDE1234567YST-SW320IC11AIC11BIC7AAUTO STANDBYSW3AUTO POWER ON/OFF CIRCUITVR3VOLUMEL.P.F.6dB/octB.P.FQ3336L.P.F.12dB/oct3615768IC7BIC3Q22, 2342D8D17D9D18Q152HIGH CUTVR2PROTECTIONH/LOFFPWRR60C45TIMERIC5MUSICSENSORIC484637Q12PWRREGULATORIC12Q11LR+INPUT 1LRINPUT 2LR+OUTPUTIC1A432SW2PHASESELECTIC1BL.P.F.12dB/oct68BASSSELECTSW4+PRE DRIVEQ28, 10POWER DRIVEQ9, 16A/C, 26A/C,Q28, 29A.N.I.CLIMITERRY1IC8, 9Q25D12, 13, 19Q1821D6, 14, 33, 340.1SPEAKERQ1C, 17C, 24AQ27, 31PS AMPQ1A, 17A, 24CQ30, 32PS AMPB+BH.P.F.12dB/oct+1212REGULATORPOWER SUPPLYD2IC6IC10F1POWER SW5+BBPOWER SUPPLYD1STANDBY/ONSW1R, T ONLYREGULATORQ13, 14D15SUB POWER SUPPLYD11RY2T1+I BLOCK DIAGRAM13ABCDEFGH123456IJK78YST-SW320ISCHEMATIC DIAGRAMVO12Vm13+Vm14VEE5+Vm26Vm27VO28VCC9VCC11+2IC1, 4, 79 : PC4570HADual OP-AmpIC5 : M51848LCR Timer* All voltage are measured with a 10M/V DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.2SK304 (E, T)NJM4558LPC1237HAM51848LPC4570HA191SS133S2L20U1SR139-400MTZJ3.6BMTZJ12.0CMTZJ24.0BAnodeCathodeBCE2SA970 (GR, BL)2SA1015 (Y)2SA1145 (O, Y)2SC1815 (Y, GR)2SC2240 (GR, BL)2SC2705 (O, Y)2SC2878 (A, B)RBV-602DGS2SA1492Z (O, P, Y)2SC3856Z (O, P, Y)2SC4688 (R, O)PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.14L.P.F.L.P.F.L.P.F.H.P.F.B.P.F.LIMITERPRE DRIVEPOWER DRIVEPS AMPPROTECTIONPOWER SUPPLYA.N.I.CPOWER SUPPLYSUBPOWER SUPPLYAUTO POWER ON/OFFCIRCUIT00011.83.43.42.75.9-0.1000.600-0.1000-11.9000-11.900011.8001.8000.67.97.3000-11.900011.8AC 97.6VAC 25.9VAC 11.2V011.55.65.611.50.900.711.507.903.97.96.703.96.61.3007.501.36.67.95.37.57.57.900-16.416.4016.411.80-16.4-11.96.66.000011.800-0.3-0.3-11.90000-11.9000011.800-1.500000.10.10.1-11.911.8000000-62.5-61.9-61.8-61.9-62.5-61.4-61.8-61.4-1.6-61.4-61.8-61.800.20.70.761.662.162.962.461.661.662.11.7-1.0-1.61.71.71.14.263.163.13.61.13.60.60.62.63.262.6063.163.062.662.762.763.162.463.12.62.663.10063.162.462.4000-2.7-62.3-3.2-0.5-0.5-1.0-62.8-3.6-3.6-1.0-4.2-62.8-1.6-62.8-62.3-62.9-63.4-62.862.8-63.1-63.4-62.8-2.6-2.6-2.70-62.83.300.702.00006.66.00.724.363.100-62.84.2IDLING CURRENT ADJ.DC 50mV to 250mVAB+BCE2SA18372SC479318IC11 : NJM4558LDual OP-AmpIN12+IN13VCC4+IN25IN26OUT27+VCC8OUT11+IC3 : PC1237HAProtector IC for Power Amplifier12534786OverloaddetectMid-pointpotentialdetectFlip flopcircuitVcc onmuteAC OFFdetectLatch / automaticreturn selectRelaydrivecircuitGNDVccGND64123TRIGGEROUTRESETREFERENCEVOLTAGETHRESHOLDDISCHARGEVCC78+FLIP-FLOP+5RRRS1NB20+2SC1846SECB1231:OUTPUT2:COMMON3:INPUTNJM78L08ABCENJM78M12FANJM79M12FA1: OUTPUT2: COMMON3: INPUT3211:COMMON2:INPUT3:OUTPUT321YST-SW320YST-SW32015ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS :C.A.EL.CHP: CHIP ALUMI. ELECTROLYTIC CAPC.CE: CERAMIC CAPC.CE.ARRAY: CERAMIC CAP ARRAYC.CE.CHP: CHIP CERAMIC CAPC.CE.ML: MULTILAYER CERAMIC CAPC.CE.M.CHP: CHIP MULTILAYER CERAMIC CAPC.CE.SAFTY: RECOGNIZED CERAMIC CAPC.CE.TUBLR: CERAMIC TUBULAR CAPC.CE.SMI: SEMI CONDUCTIVE CERAMIC CAPC.EL: ELECTROLYTIC CAPC.MICA: MICA CAPC.ML.FLM: MULTILAYER FILM CAPC.MP: METALLIZED PAPER CAPC.MYLAR: MYLAR FILM CAPC.MYLAR.ML: MULTILAYER MYLAR FILM CAPC.PAPER: PAPER CAPACITORC.PLS: POLYSTYRENE FILM CAPC.POL: POLYESTER FILM CAPC.POLY: POLYETHYLENE FILM CAPC.PP: POLYPROPYLENE FILM CAPC.TNTL: TANTALUM CAPC.TNTL.CHP: CHIP TANTALUM CAPC.TRIM: TRIMMER CAPCN: CONNECTORCN.BS.PIN: CONNECTOR, BASE PINCN.CANNON: CONNECTOR, CANNONCN.DIN: CONNECTOR, DINCN.FLAT: CONNECTOR, FLAT CABLECN.POST: CONNECTOR, BASE POSTCOIL.MX.AM: COIL, AM MIXCOIL.AT.FM: COIL, FM ANTENNACOIL.DT.FM: COIL, FM DETECTCOIL.MX.FM: COIL, FM MIXCOIL.OUTPT: OUTPUT COILDIOD.ARRAY: DIODE ARRAYDIODE.BRG: DIODE BRIDGEDIODE.CHP: CHIP DIODEDIODE.VAR: VARACTOR DIODEDIOD.Z.CHP: CHIP ZENER DIODEDIODE.ZENR: ZENER DIODEDSCR.CE: CERAMIC DISCRIMINATORFER.BEAD: FERRITE BEADSFER.CORE: FERRITE COREFET.CHP: CHIP FETFL.DSPLY: FLUORESCENT DISPLAYFLTR.CE: CERAMIC FILTERFLTR.CO