Yamaha-YSTSW225-sub-sm 维修电路原理图.pdf

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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. 1523YST-SW225TOP VIEWFRONT VIEWIMPORTANT NOTICEThis manual has been provid

2、ed for the 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 ap

3、propriate 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 authori

4、zed YAMAHA 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

5、 data provided 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 n

6、otice or 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 (he

7、avy gauge 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. 04.07100895P.O.Box 1, Hamamatsu, JapanSERVICE MANUALSUBWOOFER SYSTEMYST-SW225RadioFans.CN 收音机爱 好者资料库YST-SW2252YST-SW225WALLOUTLETEQUIP

8、MENTUNDER 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 Current Measurement (For 120V Mo

9、dels 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.“CAUTION”“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME T

10、YPE 4A, 125V FUSE.”CAUTIONF1: REPLACE WITH SAME TYPE 4A, 125V FUSE.ATTENTIONF1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 4A, 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!The solder used in the man

11、ufacturing 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) to cause cancer and/or birth

12、 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 solder/flux vapor!If you come in

13、 contact with solder or components located inside the enclosure of this product, wash your hands beforehandling food.製品使用基板付、Sn+Ag+Cu （錫+銀+銅） 合金無鉛使用。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。All P.C.B.s used for this prod

14、uct are soldered with leadfree soldering material which is an alloy of Sn+Ag+Cu (tin+ silver + copper).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

15、+ Bi (tin + zinc + bismuth)Caution:1. As the melting point 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 termin

16、al section of the parts to bereplaced and from the area around it completely beforesoldering, or make sure that the lead free solder andlead solder melt together fully.About Lead Free Solder / 無鉛RadioFans.CN 收音机爱 好者资料库YST-SW2253YST-SW225290 (11-7/16)350 (13-3/4)290 (11-7/16)56.6(2-3/16)2.8(1/8)349.4

17、 (13-3/4)Unit : mm (inch)単位 : mm ()I SPECIFICATIONS / 参考仕様Type / 型式 .Advanced Yamaha Active Servo TechnologyOutput Power / 出力 (100 Hz, 5 ohms, 10% T.H.D.). 120 WDynamic Power / (5 ohms). 150 WInput Sensitivity / 入力感度INPUT1 (SP) . 1.5 VINPUT2 (PJ) . 70 mVInput Impedance / 入力INPUT1 (SP) .2.2 kohmsINPU

18、T2 (PJ) .12 kohmsFrequency Response / 再生周波数帯域 . 28 Hz to 200 HzDriver / .8 (20 cm) cone,Magnetic Shielding TypeInput Section / 入力部INPUT1.Speaker TerminalINPUT2. RCA Pin JackOperation Section / 操作部Top Panel .STANDBY/ON Switch, B.A.S.S. Switch,High Cut Filter Switch, Volume Control,High Cut Control, L

19、ED IndicatorRear Panel .Power Switch, Auto Standby Switch(HIGH / LOW / OFF), Phase Switch(NORM / REV), Voltage Selector (L, Rmodels only)Power Supply / 電源U, C models . AC 120 V, 60 HzR, L models .AC 240 220 / 120 110 V, 50/60 HzT model . AC 220 V, 50 HzK model . AC 220 V, 60 HzA model . AC 240 V, 50

20、 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 . 65 WJ model. 50 WStandby Power Consumption / 待機時消費電力. 0.5 WDimensions / 外形寸法 (W x H x D) . 290 x 350 x 349 mm (11-7/16 x 13-3/4 x 13-3/4)Weight / 質量. 11.5 kg (25 lbs. 6 oz.)FinishChe

21、rry Color .C, R, T, K, G, L, J modelsWhite Color . R, T, K, A, B, G, L, J modelsSilver Color. U, C, T, A, B, G, L modelsBlack Color .U, C, T, A modelsAccessories / 付属品Subwoofer Cable (5 m) x 1 (J model), Speaker cable (4m) x 2 (J model), Nonskid Pad x 4* Specifications are subject to change without

22、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 Servo Technology is aunique

23、 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.QD QD （） 、低音4水平方向効率放射独自。YST

24、-SW2254YST-SW225I REAR PANELSR modelU, C models123 4567891 MAIN (8) P.C.B.2 Driver3 MAIN (10) P.C.B.4 MAIN (1) P.C.B.5 MAIN (2) P.C.B.6 MAIN (3) P.C.B.7 MAIN (4) P.C.B.8 Power Transformer9 MAIN (5) P.C.B.Front SideRight SideI INTERNAL VIEWYST-SW2255YST-SW225T modelB, G modelsJ modelL modelK modelA m

25、odelYST-SW2256YST-SW225Driver22Base11Connector2. 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. 外。（Fig. 2）f. MAIN (3) P.C.B.接続 （CB3） 外。 （Fig. 2）g. 2本外。 （Fig. 2） 取外矢印 （） 印刷。h. 外。 （Fig. 2）2. Removal of Rear Panel Assya. Remove 8 screws (3)

26、. (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 the Control Unit from the Rear panel. (Fig. 2)f. Disconnect the connector (CB3) conne

27、cted to the MAIN(3) P.C.B. (Fig. 2)g. Remove 2 screws (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。 （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.

28、)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 connected to the terminal ofthe Driver. (Fig. 1)Fig. 1YST-SW2257YST-SW225343Rear Panel Assy

29、 AssyControl UnitRear Cover455CB2CB3Rubber Sheet and Cloth布Fig. 3When Checking the P.C.B.:Rear Panel Assy and Control Unit areassembled.Connect all the connectors removed duringdisassembly back to the original positions.Spread cloth first and place the rear panel assyon it. (Fig. 3)P.C.B.場合 Assy組立。

30、分解際外元通接続。 布敷、上Assy置。 （Fig. 3）Fig. 2YST-SW2258YST-SW225I ADJUSTMENTS / 調整G Confirmation of Power Amp operationFor the power amplifier which 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 th

31、e followingprocedure.Devices requiredSignal generator8 or 6 load resistorOscilloscope (dual trace type)Connection1) Connect the output signal 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 resi

32、stor.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 main unit.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 CH

33、2 must be leftunconnected.Setting1) Set the signal generator to the sine wave, 100 Hz andminimum output level settings.2) Set 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 outpu

34、t level observed atoscilloscope CH2 is 28 Vp-p.Waveform observationWith the settings made as described above, observethe waveform 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

35、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。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。YST-SW2259ABCDEFGHIJ1234567PS AMPPS AMPPS AMP

36、PSAMPPOWERDRIVEPOWER DRIVEDRIVERIDLING CURRENT ADJIDLING CURRENT ADJ. .DC 10 mV to 300 mVIDLING CURRENT ADJ.ABSchematic Diagram / 回路図G Idling AdjustmentTo stabilize operation of the amplifier, turn ON the powerwith no input signal and wait for 2 to 3 minutes in nonloaded condition before the adjustm

37、ent.Confirm that the voltage across the terminals TP1 and TP2is 10 mV to 300 mV.If it exceeds 300 mV, open (cut off) R110.G Confirmation of AUTO STANDBY operationSetting1) Turn off the power switch located on the rear panel.2) In order to shorten the time required for operationcheck; connect a 10k r

38、esistor at both ends of R72 onthe MAIN (2) P.C.B. (Refer to page 12)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 located on the rear panel.Confirmation1) Set t

39、he 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 HIGH position.5) Turn on the STANDBY/ON swit

40、ch.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 ends ofR72.調整動作安定、信号入力電源入、無負荷状態2、3分待調整行。TP1TP2端子

41、間電圧10 mV 300 mV確認。電圧300 mV越場合、R110。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。 （12参照）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）

42、 STANDBY/ONOFF。表示LED消灯。確認終了後1） 主電源切。2） R72両端取付抵抗外。Printed Circuit Board / 図ABDC 10 mV to 300 mVMAIN (10) P.C.B.MAIN (1) P.C.B.R110D34TP1TP2D33IDLING CURRENT ADJ.GND2ABCDEFGHIJ13457YST-SW225610IC1AIC1BIC3BPASSMOVIEMOVIEMUSICMUSICSW7HIGH CUT FILTERSW3B.A.S.S.PASSONONAUTO STANDBYSW2AUTO POWERON/OFF CIR

43、CUITVR1VOLUMEL.P.F.6dB/octL.P.F.12dB/oct36157IC4AQ23, 28, 30, 34321D6D10D2GRD3GRQ42HIGH CUTVR2PROTECTIONHLOFFOFFLHR72C39TIMERIC7MUSICSENSORIC684637Q9+REGULATORIC8Q3LR+INPUT 1LRINPUT 2LR+OUTPUTIC2A3274SW1PHASESELECT+PRE DRIVEQ1317Q20, 21POWERDRIVEQ25, 26LIMITERRY1IC8IC5Q580.1Q24C, 32PS AMPQ24A, 33PS

44、AMPB+BH.P.F.12dB/oct+15+B15BREGULATORPOWER SUPPLYD21Q18Q19F1POWERSW5STANDBY/ONSW4(R, L models only)REGULATORQ1, 2D4SUB POWER SUPPLYD1RY2T1DRIVER56A.N.I.CQ10, 11+IC3A321H.P.F.12dB/oct+IC4B567+I BLOCK DIAGRAMYST-SW22511A1234567BCDEFGHIJLEDGE1LEDRLEDGE1LEDRMAEAUT-15+15VCCPWSAUTPWSVCC+V1ESIGEAUT+15-15SI

45、GEAUT+15-15MAEAUT-15+15VCCPWSMAIN (8) P. C. B.MAIN (1) P. C. B.MAIN (4) P. C. B.MAIN (3) P. C. B.VOLUMEHIGH CUTHIGH CUT FILTERB.A.S.S.STANDBY/ONOUTPUT / INPUT 1INPUT 2PHASENORMREVMAIN (2)GAC+BSG-BMAIN (10)+B1DR+TR-BDR-OUT-B1AYST+15EPOWMAIN (10)Ref. no.LocationD2B2D3B2D6C4D7B4D9B4D10B4D12B4D13B4D15B5

46、D16C5D17C5D19B7D20B7D36C7D37C7IC1G6IC2I6IC3I3 Semiconductor LocationRef. no.LocationIC4G3IC5B6Q4B4Q5B4Q6B4Q7B4Q8B4Q10C6Q11C6Q13C4Q14B5Q15B5Q16B5Q17C4Q18B7Q19C7Q20C5Q21C5OFFONMOVIEMUSICPASSONC79I PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder UsedYST-SW22512A1234567BCDEFGHIJKMAIN (5) P. C. B.POWE

47、RAUTOSTANDBYR, 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+V1EWHWHBEBEGYGYORORWHBEREWHBEBEGYGYBRBRYEYEMAIN (1)GAC+BSG-BMAIN (1)+B1DR+TR-BDR-OUT-B1AYST+15EPOWM

48、AIN (1)Ref. no.LocationD1C4D4B5D5B4D18H6D21I6D22I5D23I2D24I5D25I2D26J5 Semiconductor LocationRef. no.LocationD27J5D28J5D29J2D30J2D31J2D32H4D33I3D34I4D35I3IC6B6Ref. no.LocationIC7B6IC8B5Q1B5Q2B5Q3B5Q9B6Q22J3Q23I4Q24AJ2Q24CJ5Ref. no.LocationQ25J4Q26J3Q28H4Q29I3Q30I4Q31I4Q32J5Q33J2Q34I4CONFIRMATION OF

49、AUTO STANDBY OPERATIONR72add 10 kohmsOFFONOFFLOWHIGH2 S C 1 8 4 6 S2 S D 1 8 8 92 S B 1 3 4 02 S B 1 3 4 02 S D 1 8 8 9I PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder UsedABCDEFGHIJKLYST-SW22513SCHEMATIC DIAGRAM123456789# All voltages are measured with a 10M/V DC electronic volt meter.# Compone

50、nts having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.# Schematic diagram 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: PC4570HADual OP-AmpVccVo1-Vm1