Yamaha-YSTSW205-sub-sm 维修电路原理图.pdf

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1、SERVICE MANUALSUBWOOFER SYSTEMYST-SW205/305100768I CONTENTSTO SERVICE PERSONNEL . 1SPECIFICATIONS. 2INTERNAL VIEW . 3REAR PANELS . 45DISASSEMBLY PROCEDURES . 6ADJUSTMENTS.78BLOCK DIAGRAM. 9PRINTED CIRCUIT BOARD . 1015SCHEMATIC DIAGRAM . 1617PARTS LIST . 1831IMPORTANT NOTICEThis manual has been provi

2、ded for the use of authorized YAMAHARetailers and their service personnel.It has been assumed that basic service procedures inherent to theindustry, and more specifically YAMAHA Products, are alreadyknown and understood by the users, and have therefore not beenrestated.WARNING:Failure to follow appr

3、opriate service and safetyprocedures when servicing this product may resultin personal injury, destruction of expensivecomponents, and failure of the product to performas specified. For these reasons, we advise allYAMAHA product owners that any servicerequired should be performed by an authorizedYAM

4、AHA Retailer or the appointed servicerepresentative.IMPORTANT:The presentation or sale of this manual to anyindividual or firm does not constitute authorization,certification or recognition of any applicabletechnical capabilities, or establish a principle-agentrelationship of any form.The data provi

5、ded is believed to be accurate and applicable to theunit(s) indicated on the cover. The research, engineering, and servicedepartments of YAMAHA are continually striving to improveYAMAHA products. Modifications are, therefore, inevitable andspecifications are subject to change without notice or oblig

6、ation toretrofit. Should any discrepancy appear to exist, please contact thedistributors Service Division.WARNING:Static discharges can destroy expensivecomponents. Discharge any static electricity yourbody may have accumulated by grounding yourselfto the ground buss in the unit (heavy gauge blackwi

7、res connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and partreplacement. Recheck all work before you applypower to the unit.YST-SW205/305P.O.Box 1, Hamamatsu, JapanYST-SW205YST-SW305RadioFans.CN 收音机爱 好者资料库YST-SW205/305YST-SW205/3051WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER O

8、REQUIVALENTINSULATINGTABLEWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency(and

9、 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 FOR ANY REA-SON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder

10、fumes or exposeeyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands beforehandling food.I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked sand must be replac

11、ed 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

12、 to 1500 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.RadioFans.CN 收音机爱 好者资料库YST-SW205/305YST-SW205/305I SPECIFICATIONSYST-SW205YST-SW305TypeAdvanced Yamaha Active Servo TechnologyOutput Power150 W/100 Hz, 5 10% T.H.D.200

13、 W/100 Hz, 5 10% T.H.D.Input SensitivityINPUT 1 (SP)0.8 V (50 Hz, 150 W/5, L+R)1.0 V (50 Hz, 200 W/5, L+R)INPUT 2 (PJ)40 mV (50 Hz, 150 W/5, L+R)50 mV (50 Hz, 200 W/5, L+R)Input ImpedanceINPUT 1 (SP)2.2 kINPUT 2 (PJ)12 kFrequency Response23 Hz 170Hz20 Hz 160HzDriver Unit20 cm (8) cone20 cm (8) conem

14、agnetic shielding type x 1magnetic shielding type x 2Input SectionINPUT 1Speaker terminalINPUT 2RCA pin jackPower SupplyU, C modelsAC120V, 60HzA modelAC240V, 50HzB, G modelsAC230V, 50HzR, T modelsAC110/120/220/240V, 50/60HzPower Consumption70 W80 WStandby Power Consumption0.8 W0.8 WDimensions (W x H

15、 x D)235 x 485 x 402 mm235 x 585 x 445 mm(9-5/16 x 19-1/16 x 15-13/16)(9-5/16 x 23 x 17-1/2)Weight15 kg (33 lbs. 1 oz.)21 kg (48 lbs. 8 oz.)FinishAll modelsBlack color / Cherry colorAccessoryNonskid Pad x 4U . U.S.A. modelC. Canada modelA .Australia modelB . British modelG. Europe modelR. General mo

16、delT.China model Specifications are subject to change without notice due to product improvements.235 (9-5/16)351 (13-13/16)19(3/4)32(1-1/4)402 (15-13/16)485 (19-1/16) DIMENSIONS2235 (9-5/16)394 (15-1/2)19(3/4)32(1-1/4)445 (17-1/2)585 (23)Unit : mm (inch)YST-SW205YST-SW305YST-SW205/305YST-SW205/30531

17、234567890I INTERNAL VIEW1 MAIN (5) P. C. B.2 MAIN (4) P. C. B.3 MAIN (10) P. C. B.4 MAIN (3) P. C. B.5 MAIN (9) P. C. B. R, T models only6 MAIN (8) P. C. B. U, C, A, B, G modelsMAIN (7) P. C. B. R, T models1234568907YST-SW205YST-SW3057 MAIN (1) P. C. B.8 MAIN (2) P. C. B.9 MAIN (6) P. C. B.0 Power T

18、ransformerYST-SW205/305YST-SW205/30570 WATTSI REAR PANELSU, C modelsA modelB, G modelR modelT model4YST-SW205YST-SW205/305YST-SW205/305580WATTS80WATTSU, C modelsA modelB, G modelR modelT modelYST-SW305YST-SW205/305YST-SW205/30533444444Extension cableCB3CB9CB922Front Panel AssyMain (5) P.C.B.1 (Remov

19、e parts in the order as numbered.)G For exchanging the driver unit1. Removal of Front GrilleThe front grille is fixed to the cabinet with dowels at 6 locations.As a screwdriver (for slotted head screw) is used for removal, usespecial care not to cause damage to the cabinet.a. Apply the block to the

20、rear panel so as to avoid damage to theTerminal of the rear panel.b. Use the screwdriver inserted in the gap between the front grilleand the cabinet (bottom side first), push up the front grille. (Fig. 1)c. Remove the front grille by lifting it up. (Fig. 1)2. Removal of Driver unita. Remove 4 (8 whe

21、n YST-SW305) screws (1) in Fig. 2, andremove the Driver unit.b. Remove the cable cord.G For repairing P.C.B.Repairing P.C.B. is possible without removing front grille.1. Removal of Front Panel AssyRemove 2 screws (2) and then remove the Front Panel Assy inFig. 3.*Use an Allen wrench (3 mm) to unscre

22、w the Front Panel Assy.2. Removal of Rear PanelRemove 4 screws (3) and 12 screws (4) in Fig. 4, and removethe rear panel. At this time, disconnect the connector CB3 ofMAIN (2) P.C.B.*When removing the rear panel, replace the packing.3. P.C.B. Operation Checka. Disconnect the connector CB9 of MAIN (5

23、) P.C.B.b. Connect the connector CB3 of MAIN (2) P.C.B. and CB9 of MAIN(5) P.C.B. by using an extension cable. (Fig. 4)Extension cable : V7278000 (9P, 700 mm)I DISASSEMBLY PROCEDURESFig. 1Fig. 2Fig. 3Fig. 46YST-SW205/305YST-SW205/3057I ADJUSTMENTSG Confirmation of Power Amp operationFor the power am

24、plifier which has been repaired, it isabsolutely necessary to confirm that a correct waveformis obtained at points indicated by A and B in theschematic diagram according to the following procedure.Devices requiredSignal generator8 or 6 load resistorOscilloscope (dual trace type)Connection1) Connect

25、the output signal from the signal generator to theinput terminal of the unit.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 probe tothe point A or B indicated in the figure and the GND sideto the

26、 GND of the main unit.4) Connect the oscilloscope CH2 input to the red side of theconnector cable, which is connected with the loadresistor.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

27、 the volume of the unit to the minimum position.3) Turn on the power to the unit.4) Adjust the output level of the signal generator and thevolume of the unit so that the output level observed atoscilloscope CH2 is 28Vp-p.Waveform observationWith the settings made as described above, observe thewavef

28、orm obtained at CH1 for judgment.G Idling AdjustmentTo stabilize operation of the amplifier, turn ON the powerwith no input signal and wait for 2 to 3 minutes in non loadedcondition before the adjustment.Adjust VR1 so that the voltage between terminals TP11 andTP12 is 30mV to 200mV.G Confirmation of

29、 AUTO STANDBY operationSetting1) Turn off the power switch.2) In order to shorten the time required for operation check;connect a 10k resistor at both ends of R60 on the MAIN(3) P.C.B.3) Connect the output signal from the signal generator to theL/MONO terminal of the unit.4) Set the signal generator

30、 for the sine wave of 100Hz,8mV.5) Turn on the power switch.Confirmation1) Set the AUTO STANDBY switch to the LOW position.AUTOSTANDBYOFFHIGHLOW2) Turn on the STANDBY/ON switch.The display LED lights up (green) and its color changesto red after 5 to 10 seconds.3) Turn off the STANDBY/ON switch.The d

31、isplay LED goes off.4) Set the AUTO STANDBY switch to the HIGH position.AUTOSTANDBYOFFHIGHLOW5) Turn on the STANDBY/ON switch.The display LED lights up (green) and its color remainsunchanged even after time have elapsed.6) Turn off the STANDBY/ON switch.The display LED goes off.After confirmation1)

32、Turn off the power switch.2) Disconnect the 10k resistor connected to both ends ofR60.NormalPoint A(Cathode of D29)V : 20V/divH : 2 msec/divDC range1 : 1 probeNormalPoint B(Anode of D31)V : 20V/divH : 2 msec/divDC range1 : 1 probeAbnormal+B or GND levelBecomes constantAbnormal-B or GND levelBecomes

33、constant0V0VYST-SW205/305YST-SW205/305Schematic Diagram (Ex.: YST-SW205)Test Points (Ex.: YST-SW205)PS AMPPOWER DRIVE-65.5-66.71.865.1-1.6-4.2-4.2-1.0-1.01.21.21.865.54.4-3.6-66.74.466.166.13.3-1.64.90-2.7-2.7-2.7-66.7-66.0-66.7-66.7-2.7-66.7-66.766.165.965.765.92.766.10.60.1-2.7-2.73.3066.166.166.1

34、3.31.8-1.6-1.01.2-1.00.6-0.5-0.5-3.3-3.60.166.166.00.166.002.70.1-66.766.166.166.165.52.72.765.52.72.7-66.7-66.3-66.7-69.7IDLING CURRENT ADJ.DC 30 mV to 200 mVBAMain (1) P.C.B. Main (2) P.C.B. DC 30 mV to 200 mV TP11 (+)TP12 (-)VR1D31D29Point APoint B 8YST-SW205/305ABCDE12345679IC11AIC11BIC7AAUTO ST

35、ANDBYSW3AUTO POWER ON/OFF CIRCUITVR3VOLUMEL.P.F.6dB/octB.P.FQ3336L.P.F.12dB/oct3615768IC7BIC3Q22, 2342D8D17D9D18Q152HIGH CUTVR2PROTECTIONH/LOFFPWRR60C46TIMERIC5MUSICSENSORIC484637Q12PWRREGULATORIC12Q11LR+INPUT 1LRINPUT 2LR+OUTPUTIC1A432SW2PHASESELECTIC1BL.P.F.12dB/oct68BASSSELECTSW4+PRE DRIVEQ210Q27

36、30POWER DRIVEQ16A/C, 26A/CA.N.I.CLIMITERRY1IC8, 9Q25D12, 13, 19Q1821D6, 14, 33, 340.1Q1C, 17C, 24AQ27, 31PS AMPQ1A, 17A, 24CQ30, 32PS AMPB+BH.P.F.12dB/oct+1212REGULATORPOWER SUPPLYD2IC6IC10F1POWER SW5+BBPOWER SUPPLYD1STANDBY/ONSW1R, T ONLYREGULATORQ13, 14D15SUB POWER SUPPLYD11RY2T1+SPEAKERYST-SW305S

37、PEAKERSPEAKERYST-SW205I BLOCK DIAGRAMYST-SW205/305ABCDE1234567YST-SW205/305MAIN (1) P. C. B.From MAIN (6)REREBL-B1+B1ETR-ETR-CTR-BFromMAIN(2)FromMAIN(2)DR1+OUTDR2+DR2-DR1-+V1AYSTSPEAKERSP-SP+18Q16CQ1CQ9Q1AQ17CQ17AQ16AFromMAIN(2)IDLING TEST POINTDC 30 mV to 200 mVABI PRINTED CIUCUIT BOARD (Foil side)

38、YST-SW20510YST-SW205/305ABCDE123456711MAIN (1) P. C. B.From MAIN (6)REREBL-B1+B1ETR-ETR-CTR-BFromMAIN(2)FromMAIN(2)DR1+OUTDR2+DR2-DR1-+V1AYSTSPEAKERSSP-SP+SP-SP+18Q16CQ1CQ9Q1AQ17CQ17AQ16AFromMAIN(2)+IDLING TEST POINTDC 30 mV to 200 mVABI PRINTED CIUCUIT BOARD (Foil side)YST-SW305YST-SW205/305ABCDE12

39、34567YST-SW205/305I PRINTED CIUCUIT BOARD (Foil side)YST-SW205YST-SW305MAIN (2) P. C. B.TOVLEMA1BASS+V2+12-12PWSVCCMA1ETOVLBASS+12-12LIMMA2FromMAIN(3)FromMAIN(4)ToMAIN(5)VCCEEPWS+V1ToMAIN(1)DR1+DR2+OUTDR2-DR1-AYST+V1ToMAIN(1)+B1E-B1To MAIN (1)TR-CTR-BTR-EFrom MAIN (6)BEBLBE1919IDLING CURRENT ADJ.12Y

40、ST-SW205/305ABCDE123456713I PRINTED CIUCUIT BOARD (Foil side)YST-SW205YST-SW305181881MAIN (4) P. C. B.AUTOSTANDBYPHASELOWHIGHREVNORMOFFOUTPUT / INPUT 1 INPUT 2LR+19From MAIN (3)SMLSWH2SWH1SOFrom MAIN (2)MA2LIM-12+12BASSTOVLEMA1MAIN (3) P. C. B.WHBEU, C, A, B, G models: To MAIN (8)R, T models: To MAI

41、N (7)To MAIN (10)GYORToMAIN(2)+V1PWSEEVCCTo MAIN (4)SWLSWH2SWH1SO1819YST-SW205/305ABCDE1234567YST-SW205/305MAIN (8) P. C. B.MAIN (6) P. C. B.POWERTRANSFORMER(U, C, A, B, G models)WHBEFromMAIN(3)ToMAIN(2)BEBLBEREBLREToMAIN(1)YST-SW205YST-SW305I PRINTED CIUCUIT BOARD (Foil side)MAIN (5) P. C. B.STANDB

42、Y / ONB.A.S.S.HIGH CUTVOLUMEFrom MAIN (2)TOVLEMA1BASS+V2+12-12PWSVCC19MAIN (10) P. C. B.POWERSW5FromMAIN(3)ORGY14YST-SW205/305ABCDE123456715YST-SW205YST-SW305I PRINTED CIUCUIT BOARD (Foil side)MAIN (6) P. C. B.POWERTRANSFORMERMAIN (7) P. C. B.(R, T models)FromMAIN(9)WHREBLYEBRGRBEBEFromMAIN(3)ToMAIN

43、(2)BEBLBEREBLREToMAIN(1)MAIN (9) P. C. B.(R, T models)To MAIN (7)VOLTAGESELECTORYEBEBLBRREGR240V1-2/5-6220V2-3/6-7110V3-4/7-8120V4-5/8-1A123456789BCDEFGHIJKLYST-SW205/SW305SCHEMATIC DIAGRAM (YST-SW205)E-16/J-12INPUT 1PC4570HA19M51848LPC1237HA18NJM79M12FA1: COM2: IN3: OUTNJM78M12FA1: OUT2: COM3: INNJ

44、M78L08AOUTCOMINx:? NOT USEDO:?USED / APPLICABLENJM4558L2SA9702SA10152SA11452SC18152SC22402SC27052SC2878ECB2SK304ECBPIN CONNECTION DIAGRAM OF TRANSISTORS,DIODES AND ICS.BCE2SA18372SC47932SC18462SC46882SA16952SC44681SR139?1SS133MTZJ3.6BMTZJ12.0CMTZJ24.0BS2L20UD3SBA20S1NB20AnodeCathodeIC1, 4, 79 : PC45

45、70HADual OP-AmpIC6: NJM78M12FAVoltage RegulatorVccVo1-Vm1+Vm1VEE+Vm2-Vm2Vo2Vcc1?2?3?4?5?6?7?8?9+-12INPUTOUTPUTCOMMONIC10: NJM79M12FAVoltage RegulatorIC11: NJM4558LDual OP-AmpIC12: NJM78L08AVoltage RegulatorCOMMONOUTPUTINPUT87654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1VINVOUTGND+18BCEECBL.P.F.L.P.F.B.P.F.L.P

46、.F.H.P.F.PRE DRIVELIMITERPOWER SUPPLYA.N.I.CPS AMPPOWER DRIVEPOWER SUPPLYPROTECTIONAUTO POWER ON/OFF CIRCUITSUB POWER SUPPLY#? All voltage are measured with a 10M? /V DC electric volt meter.#? Components having special characteristics are marked s and must be replaced with parts having specification

47、s equal to those originally installed.IC5 : M51848LCR TimerIC3 : PC1237HAProtector12534786OverloaddetectMid-pointpotentialdetectFlip flopcircuitVcc onmuteAC OFFdetectLatch / automaticreturn selectRelaydrivecircuitGNDVccGND64123TRIGGEROUTRESETREFERENCEVOLTAGETHRESHOLDDISCHARGEVCC78+FLIP-FLOP+5RRR100C

48、910.01SG82KB220100/16011.88.68.08.60011.8-11.900000000-11.80.70000-11.901.90.10.600.100011.80007.97.3-11.90000000.10.6-65.70.1-65.7-66.6-65.5-64.9-65.5-66.71.865.10.665.666.165.165.1-1.6-4.2-4.2-1.0-1.01.21.21.865.165.54.4-3.6-66.766.1-66.700AC97.74.466.166.13.3-1.6-64.9-65.7-65.7-65.70.6-65.7-66.6-

49、65.70.1-0.111.80000000011.800-11.911.8-11.918.7-18.70018.7-18.7000000-11.8000.3011.8000-1.50.73.93.907.96.76.6005.201.4011.80.211.907.95.75.7012.00.2AC28.9AC12.06.66.46.45.37.96.61.407.90.7 03.32.0 00.1 06.025.10.86.62.10-2.7-2.7-2.7-66.7-66.0-66.7-66.7-2.7-66.7-66.766.165.965.765.92.766.10.60.1-2.7

50、-2.73.3066.166.166.13.31.8-1.6-1.01.2-1.00.6-0.5-0.5-3.3-3.60.166.166.00.166.002.70.1-66.766.166.166.165.52.72.765.52.72.7-66.7-66.3-66.7-69.7-11.9000IDLING CURRENT ADJ.DC 30 mV to 200 mVBAPC4570HA19M51848LPC1237HA18NJM79M12FA1: COM2: IN3: OUTNJM78M12FA1: OUT2: COM3: INNJM78L08AOUTCOMINA123456789BCD