Yamaha-YSTSW325-sub-sm 维修电路原理图.pdf

《Yamaha-YSTSW325-sub-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Yamaha-YSTSW325-sub-sm 维修电路原理图.pdf（21页珍藏版）》请在收音机爱好者资料库上搜索。

1、I CONTENTSTO SERVICE PERSONNEL . 2SPECIFICATIONS / 参考仕様 . 3INTERNAL VIEW . 4REAR PANELS . 45DISASSEMBLY PROCEDURES / 分解手順 . 67ADJUSTMENTS / 調整 . 89BLOCK DIAGRAM. 10PRINTED CIRCUIT BOARD . 1112SCHEMATIC DIAGRAM . 13PARTS LIST. 1522TOP VIEWFRONT VIEWIMPORTANT NOTICEThis manual has been provided for th

2、e use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users,and have therefore not been restated.WARNING:Failure to follow appropriate

3、 service and safety procedures when servicing this product may result in personal injury, destruction of expensivecomponents, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service requiredshould be performed by an authorized YAMAH

4、A Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicabletechnical capabilities, or establish a principle-agent relationship of any form.The data pro

5、vided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA arecontinually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or

6、obligation toretrofit. Should any discrepancy appear to exist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to theground buss in the unit (heavy gauge

7、 black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit. 2005 All rights reserved.P.O.Box 1, Hamamatsu, JapanYST-SW325 05.07100961SERVICE MANUALSUBWOOFER SYSTEMYST-SW325RadioFans.CN 收音机爱 好者资料库YST-SW32

8、52YST-SW325WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEI TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked sand must be replaced with parts having specifications equalto those originally installed.2. Leakage Curren

9、t 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 ohms shuntedby 0.15F.“CAUTION”“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIR

10、E, REPLACE ONLY WITH SAME TYPE 3A, 125V FUSE.”CAUTIONF1: REPLACE WITH SAME TYPE 3A, 125V FUSE.ATTENTIONF1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 3A, 125V.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.WARNING: CHEMICAL CONTENT NOTICE

11、!The solder used in the manufacturing process except soldering of the P.C.B. assy contains LEAD. In addition, otherelectrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by theCalifornia Health and Welfare Agency (and possibly other entities) t

12、o cause cancer and/or birth defects or other reproductiveharm.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 fumes or exposeeyes to solde

13、r/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands beforehandling food.About Lead Free Solder / 無鉛Side ASide BSMT REFLOW ProcessMI FLOW ProcessSolder Dip無鉛種類、修理時下記無鉛使用推奨。Sn+Ag+Cu （錫+銀+銅）Sn+Cu （錫+銅）Sn+Zn+Bi （錫+亜鉛+）注意： 無鉛融点温度通常鉛入

14、比3040程度高、合使用。 鉛入使得場合、交換部品端子部周辺部無鉛取除、無鉛鉛入十分溶状態付。Among some types of lead free solder currently available,it is recommended to use one of the following types for therepair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth)Caution:1. As the melting poi

15、nt temperature of the lead free solderis about 30C to 40C (50F to 70F) higher than that ofthe lead solder, be sure to use a soldering iron suitableto each solder.2. If lead solder must be used, be sure to remove lead freesolder from each terminal section of the parts to bereplaced and from the area

16、around it completely beforesoldering, or make sure that the lead free solder andlead solder melt together fully.The P.C.B.s installed in this unit are soldered using thefollowing solder.本機搭載基板付使用下記通。MAIN P.C.B.SIDE A / A 面-SIDE B / B 面Lead Free Solder / 無鉛RadioFans.CN 收音机爱 好者资料库YST-SW3253YST-SW32531

17、5 (12-7/16)380 (15)315 (12-7/16)56.6(2-3/16)2.8(1/8)374.4 (14-3/4)Unit : mm (inch)単位 : mm ()I SPECIFICATIONS / 参考仕様Type / 型式 .Advanced Yamaha Active Servo Technology IIOutput Power / 出力 (100 Hz, 5 ohms, 10% T.H.D.). 150 WDynamic Power / (5 ohms). 170 WInput Sensitivity / 入力感度 (50 Hz, 150 W/5 ohms, L

18、+R)INPUT1 (SP) . 1.5 VINPUT2 (PJ) . 60 mVInput Impedance / 入力INPUT1 (SP) . 2.2 k-ohmsINPUT2 (PJ) . 12 k-ohmsFrequency Response / 再生周波数帯域 . 25 Hz to 180 HzDriver / .20 cm (8) cone,Magnetic Shielding TypeInput Section / 入力部INPUT1.Speaker TerminalINPUT2. RCA Pin JackOperation Section / 操作部Top Panel .ST

19、ANDBY/ON Switch, B.A.S.S. Switch,High Cut Filter Switch, Volume Control,High Cut Control, LED IndicatorRear Panel .Power Switch, Auto Standby Switch(HIGH / LOW / OFF), Phase Switch(NORM / REV), Voltage Selector (R, Lmodels)Power Supply / 電源U, C models . AC 120 V, 60 HzR, L models .AC 110 120 / 220 2

20、40 V, 50/60 HzT model . AC 220 V, 50 HzK model . AC 220 V, 60 HzA model . AC 240 V, 50 HzB, G models . AC 230 V, 50 HzJ model. AC 100 V, 50/60 HzPower Consumption / 消費電力U, C, R, T, K, A, B, G, L models . 70 WJ model. 60 WStandby Power Consumption / 待機時消費電力. 0.5 WDimensions / 外形寸法 (W x H x D). 315 x

21、380 x 374 mm (12-7/16 x 15 x 14-3/4)Weight / 質量. 13.0 kg (28 lbs. 10 oz.)FinishCherry Color . U, C, R, T, K, A, B, G, L, J modelsBlack Color . U, C, R, T, K, A, B, G, L, J modelsAccessories / 付属品Speaker cable (4 m) x 2 (J model), Subwoofer Cable (5m) x 1 (J model), Nonskid Pad x 4* Specifications ar

22、e subject to change without notice due to productimprovements. 参考仕様外観予告変更。U . U.S.A. modelA . Australian modelC . Canadian modelB . British modelR . General modelG . European modelT . Chinese modelL. Singapore modelK . Korean modelJ . Japanese model DIMENSIONS / 寸法図Advanced YSTAdvanced Yamaha Active

23、 Servo Technology is aunique system to let the speaker unit have a perfectlylinear motion by the speaker and amplifiercombination.、組合振動板効率動最大音圧時大幅改善。QD-Bass TechnologyQD-Bass (Quatre Dispersion Bass) technology is aYamaha unique technology to radiate the soundefficiently in four horizontal direction

24、.QD QD （） 、低音4水平方向効率放射独自。YST-SW3254YST-SW325I REAR PANELSR modelU, C modelsFront SideRear Side1MAIN (8) P.C.B.DriverMAIN (3) P.C.B.MAIN (4) P.C.B.MAIN (2) P.C.B.MAIN (1) P.C.B.MAIN (10) P.C.B.Power TransformerMAIN (6) P.C.B. MAIN (7) P.C.B.MAIN (9) P.C.B. (R, L models)MAIN (5) P.C.B.1234567890AB2345

25、678B A90I INTERNAL VIEWYST-SW3255YST-SW325T modelB, G modelsJ modelL modelK modelA modelYST-SW3256YST-SW325Driver22Base11Connector2. ASSY外方a. 8本外。 （Fig. 2） 取外矢印 （） 印刷。b. ASSY引出。 （Fig. 2）c. MAIN (8) P.C.B.接続 （CB2） 外。 （Fig. 2）d. 5本外。 （Fig. 2）e. 取外。（Fig. 2）f. MAIN (3) P.C.B.接続 （CB3） 外。 （Fig. 2）g. 1本外。

26、（Fig. 2） 取外矢印 （） 印刷。h. 取外。 （Fig. 2）2. Removal of Rear Panel Assya. Remove 8 screws (3). (Fig. 2)* Screws (3) are identified with arrow marks ().b. Pull out the rear panel assy. (Fig. 2)c. Disconnect the connector (CB2) connected to the MAIN(8) P.C.B. (Fig. 2)d. Remove 5 screws (4). (Fig. 2)e. Remove

27、 the Control Unit from the Rear panel. (Fig. 2)f. Disconnect the connector (CB3) connected to the MAIN(3) P.C.B. (Fig. 2)g. Remove 1 screw (5). (Fig. 2)* Screws (5) are identified with arrow marks ().h. Remove the Rear Cover. (Fig. 2)I DISASSEMBLY PROCEDURES / 分解手順（番号順部品取外。）AC電源、電源抜。1. 外方a. 4本外、取外。

28、（Fig. 1）b. 4本外、取外。 （Fig. 1）c. 端子接続外。 （Fig. 1） (Remove parts in the order as numbered.)Disconnect the power cable from the AC outlet.1. Removal of Drivera. Remove 4 screws (1) and then remove the Base.(Fig. 1)b. Remove 4 screws (2) and then remove the Driver.(Fig. 1)c. Disconnect the connector connec

29、ted to the terminal ofthe Driver. (Fig. 1)Fig. 1YST-SW3257YST-SW325343Rear Panel Assy ASSYRear Cover45CB2CB3CB3MAIN (8) P.C.B.Control UnitMAIN (3) P.C.B.Rubber Sheet and Cloth布Rear Panel AssyASSYControl UnitFig. 3When Checking the P.C.B.:Assemble Rear Panel Assy and Control Unit.Connect all the conn

30、ectors removed during dis-assembly back to the original positions.Spread cloth first and place the Rear PanelAssy and Control panel on it. (Fig. 3)P.C.B.場合 ASSY組立。 分解際外元通接続。 布敷、上ASSY置。（Fig. 3）Fig. 2YST-SW3258YST-SW325I ADJUSTMENTS / 調整G Confirmation of Power Amp operationFor the power amplifier whic

31、h has been repaired, it isabsolutely necessary to confirm that a correctwaveform is obtained at points indicated by A and B inthe schematic diagram according to the followingprocedure.Devices requiredSignal generator8 or 6 load resistorOscilloscope (dual trace type)Connection1) Connect the output si

32、gnal from the signal generator tothe input 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 GND of the m

33、ain unit. (Fig. 1)4) Connect the oscilloscope CH2 input to the red side ofthe connector 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, 100 Hz andminimum output level settings.2) Set th

34、e 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 28 Vp-p.Waveform observationWith the settings made as described above, observethe wavefor

35、m obtained at CH1 for judgment.Point A (Cathode of D34)V : 20 V/divH : 2 msec/divDC range1 : 1 probePoint B (Anode of D33)V : 20 V/divH : 2 msec/divDC range1 : 1 probe動作確認修理場合、下記手順従、回路図示A点B点正波形得必確認。必要機器信号発生器86負荷抵抗 （2現象）接続1） 信号発生器出力信号本機入力端子接続。2） 接続端子外、負荷抵抗接続。3） CH1端子HOT側図示A点B点接続、GND側本機GND接続。 （Fig. 1）

36、4） CH2HOT端子、負荷抵抗接続赤側接続。注意：時、CH2GND端子接続。設定1） 信号発生器正弦波、100 Hz、最低出力設定。2） 本機最小設定。3） 本機電源入。4） 信号発生器出力本機調整、CH2観測出力28 Vp-p。波形観測上記設定、CH1得波形観測判断。28 Vp-p28 Vp-pYST-SW3259ABCDEFGHIJ1234567G Confirmation of AUTO STANDBY operationSetting1) Turn off the power switch located on the rear panel.2) In order to shorte

37、n the time required for operationcheck; connect a 10k resistor at both ends of R72 onthe MAIN (2) P.C.B. (Fig. 2)3) Connect the output signal from the signal generator tothe INPUT 2 / L/MONO terminal of the unit.4) Set the signal generator for the sine wave of 100Hz,8mV.5) Turn on the power switch l

38、ocated on the rear panel.Confirmation1) Set the AUTO STANDBY switch to the LOW position.2) Turn on the STANDBY/ON switch.The display LED lights up (green) and its color changesto red after 4 to 5 seconds.3) Turn off the STANDBY/ON switch.The display LED goes off.4) Set the AUTO STANDBY switch to the

39、 HIGH position.5) 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) Turn off the power switch.2) Disconnect the 10k resistor connected to both end

40、s ofR72.動作確認設定1） 主電源OFF。2） 動作確認時間短縮、MAIN （2） P.C.B.R72両端10 k抵抗取付。 （Fig. 2）3） 信号発生器出力信号本機入力2L/MONO端子接続。4） 信号発生器正弦波、100 Hz、8 mV設定。5） 主電源ON。確認1） /感度 低 合。2） STANDBY/ONON。表示LED点灯 （緑色） 。45秒後、表示LED赤色変。3） STANDBY/ONOFF。表示LED消灯。4） /感度 高 合。5） STANDBY/ONON。表示LED点灯 （緑色） 。時間経過表示LED色変化。6） STANDBY/ONOFF。表示LED消灯。確認

41、終了後1） 主電源切。2） R72両端取付10 k抵抗外。R7210kR7210 kFig. 1D33D34ABGNDFig. 2MAIN (2) P.C.B.MAIN (10) P.C.B.DRIVERPS AMPPS AMPPSAMPPSAMPPROTECTIONAB2ABCDEFGHIJ13457YST-SW325610IC1AIC1BIC3BPASSMOVIEMOVIEMUSICMUSICSW7HIGH CUT FILTERSW3B.A.S.S.PASSOFFOFFAUTO STANDBYSW2AUTO POWERON/OFF CIRCUITPOWERINDICATORVR1VOLUM

42、EL.P.F.6dB/octL.P.F.12dB/oct36157IC4AQ23, 28, 30, 343348610111321D6D10D2GRD3GRQ42HIGH CUTVR2PROTECTIONHLOFFOFFLHR72C39TIMERIC7MUSICSENSORIC684637Q9+REGULATORIC8Q3LR+INPUT 1L/MONORINPUT 2LR+OUTPUTIC2A3274SW1PHASESELECTPOWERAMPLIMITERRY1IC8IC5Q5, 60.1Q24C, 32PS AMPQ24A, 33PS AMPB+BH.P.F.12dB/oct+15+B1

43、5BREGULATORPOWER SUPPLYD21Q18Q19F1POWERSW5STANDBY/ONSW4(R, L models)REGULATORQ1, 2D4SUB POWER SUPPLYD1RY2T1DRIVER56A.N.I.CQ10, 11Q29, 31+IC3A321H.P.F.12dB/oct+IC4B567+NORMREV+IC9I BLOCK DIAGRAMYST-SW32511A1234567BCDEFGHIJSIGEAUT+15-15SIGEAUT+15-15MAIN (8) P. C. B.MAIN (1) P. C. B.MAIN (4) P. C. B.MA

44、IN (3) P. C. B.VOLUMEHIGH CUTHIGH CUT FILTERB.A.S.S.STANDBY/ONPOWERINDICATOROUTPUT / INPUT 1INPUT 2PHASENORMREVMAIN (2)(CB1)MAIN (10)(W7A)MAIN (10) (W6A)MAIN (10)(W3)OFFONMOVIEMUSICPASSONLEDRAUTPWSPWSVCC+15-15AUT-V2BASECUROUTVCC+V1E+B-BEE1LEDGLEDRE1LEDGCircuit No.U, C, JR, LT, K, B, GAL4, 5XXOXC82XX

45、OXJ33, 106OOXORef. no.LocationD2B2D3B2D6C4D10B4D16C6D17C6D19C6D20C6D32C5D36B6D37C6 Semiconductor LocationRef. no.LocationIC1F6IC2H6IC3H3IC4F3Q4C4Q10B5Q11C5Q18C6Q19C6Q23C5Q28C5PWSVCC+15-15AUTEMAI PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder UsedYST-SW32512A1234567BCDEFGHIJKMAIN (5) P. C. B.AUTO

46、STANDBYR, T, K, L modelsU, C, R, A, B, G, J modelsR, L modelsPOWERTRANSFORMERPOWERTRANSFORMERVOLTAGE SELECTORMAIN (2) P. C. B.MAIN (7) P. C. B.MAIN (6) P. C. B.MAIN (10) P. C. B.MAIN (7) P. C. B.MAIN (9) P. C. B.MAIN (6) P. C. B.AUTPWSVCC+V1EWHWHBEBEGYGYORWHBEBEBEGYGYBRBRYEYEMAIN (1)(W1)REWHRef. no.

47、LocationD1B4D4B5D5B4D7J5D9J5D12J4D13J4D15J4D18H6 Semiconductor LocationRef. no.LocationD21I6D22I2D23I5D24I2D25I5D26I2D27I3D28I3D29I5Ref. no.LocationD30I5D31I5D33I5D34J2D35H3IC5I2IC6B6IC7B6IC8A5Ref. no.LocationIC9K3Q1B5Q2B5Q3B5Q5J4Q6J4Q9B6Q24AI5Q24CI3Ref. no.LocationQ29J4Q30I3Q31I3Q32K2Q33K5Q34H3CONF

48、IRMATION OF AUTO STANDBY OPERATIONR72add 10 k-ohmsOFFLOWHIGHMAIN (1)(W6B)MAIN (3)(CB3)MAIN (1)(W7B)DRIVER11391MAAUT-15+15VCCPWSPWSVCC+15-15AUT-V2BASEOUTCUREE+B-BOFFONPOWERGYORCircuit No.U, C, JR, LT, K, B, GAC25XOXXR46XOXXD4XOXXQ1XOXXQ2XOXXC27XOXXC28OXOOR52OXOOI PRINTED CIRCUIT BOARD (Foil side) Lea

49、d Free Solder UsedABCDEFGHIJKLYST-SW32513SCHEMATIC DIAGRAM123456789# All voltages are measured with a 10M/V DC electronic volt meter.# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.# Schematic diagram

50、is subject to change without notice. 電圧、内部抵抗10M電圧計測定。 s印部品、安全性確保部品示。部品交換必要場合、記載部品使用。 本回路図標準回路図。改良予告変更。IC2, 5, 6: PC4570HA-ADual OP-AmpVccVo1-Vm1+Vm1VEE+Vm2-Vm2Vo2Vcc123456789+-1287654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1IC1, 3, 4: NJM4558LDual OP-AmpIC7: LB8555DTimer1VCC8DISCHARGE7CONTROL VOLTAGE5THRESHO