Yamaha-YSTSW1500-sub-sm 维修电路原理图.pdf

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1、100828IMPORTANT NOTICEThis manual has been provided 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 therefo

2、re not been restated.WARNING:Failure to follow appropriate 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

3、service requiredshould be performed by an authorized 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 establi

4、sh a principle-agent relationship of 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 departments of YAMAHA arecontinually striving to improve YAMAHA products. Modifications are, therefore, inevitable a

5、nd specifications are subject to change without notice 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 gro

6、unding yourself to theground buss in the unit (heavy 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.P.O.Box 1, Hamamatsu, JapanI CONTENTSTO SERVICE PERSONNEL . 2FRONT PANEL . 2REAR PANEL

7、S . 34SPECIFICATIONS. 5DISASSEMBLY PROCEDURES / 分解手順 . 67SERVICE POSITION. 7REPAIR PROCEDURES / 修理手順. 811ADJUSTMENT / 調整. 1214IC DATA . 15BLOCK DIAGRAM. 16PRINTED CIRCUIT BOARD . 1721IC BLOCK. 22PIN CONNECTION DIAGRAM . 22SCHEMATIC DIAGRAM . 23PARTS LIST. 2537REMOTE CONTROL. 38Parts List for Carbon

8、Resistors . 39SERVICE MANUALSUBWOOFER SYSTEMYST-SW1500YST-SW1500V983440RadioFans.CN 收音机爱 好者资料库2YST-SW1500YST-SW1500WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEI TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked san

9、d 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 shou

10、ld be equivalent to 1500 ohm shuntedby 0.15F.“CAUTION”“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 12A,250V FUSE.”CAUTIONF1: REPLACE WITH SAME TYPE 12A, 250V FUSE.ATTENTIONF1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 12A, 250V.GLeakage current must not excee

11、d 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.I FRONT PANELWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (whereapplicable) components may also contain traces of chem

12、icals found by the California Health and Welfare Agency (andpossibly 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

13、solder and your skin! When soldering, do not inhale solder 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.RadioFans.CN 收音机爱 好者资料库3YST-SW1500YST-SW1500I REAR PANELSA modelU, C

14、modelsB model4YST-SW1500YST-SW1500G modelJ modelK model5YST-SW1500YST-SW1500420 (16-9/16)448 (17-5/8)Unit : mm (inch)単位: mm（）511 (20-1/8)420 (16-9/16) DIMENSIONS / 寸法図I SPECIFICATIONS / 参考仕様Type / 型式 . Advanced Yamaha Active Servo TechnologyOutput Power / 出力. 1kW (100 Hz, 5 ohms 10% T.H.D.)Input Sen

15、sitivity / 入力感度INPUT1 (SP) .1.0 V (50 Hz, 1 kW / 5 ohms, L + R)INPUT2 (PJ) .50 mV (50 Hz, 1 kW / 5 ohms, L + R)INPUT3 (PJ) .50 mV (50 Hz, 1 kW / 5 ohms, L + R)Input Impedance / 入力INPUT1 (SP) .2.2 k-ohmsINPUT2 (PJ) .12 k-ohmsINPUT3 (PJ) .12 k-ohmsFrequency Response / 再生周波数帯域 .16 Hz to 160 HzDriver /

16、. 12 Cone, Magnetic Shielding TypeInput Section / 入力部INPUT1. Speaker TerminalINPUT2. Pin JackINPUT3. Pin JackI/O PORT . 3.5 mm Mini JackOutput Section / 出力部H.P.F. OUT . Pin JackI/O PORT . 3.5 mm Mini JackOperation Section / 操作部Front Panel.STANDBY/ON Switch, B.A.S.S. Switch,VOLUME Control, HIGH CUT C

17、ontrolRear Panel .Power Switch, Auto Standby Switch (HIGH /LOW / OFF), H.P.F. Switch (80 Hz / 100 Hz)Power Supply / 電源U, C models .AC 120 V, 60 HzA model .AC 240 V, 50 HzB, G models .AC 230 V, 50 HzK model .AC 220 V, 50 HzJ model . AC 100 V, 50/60 HzPower Consumption / 消費電力U, C, A, B, G, K models .

18、250 WJ model . 185 WStandby Power Consumption / 待機時消費電力 . 1.0 WDimension / 外形寸法 (W x H x D) .420 x 511 x 448 mm (16-9/16 x 20-1/8 x 17-6/8)Weight / 質量 . 29.0 kg (63 lbs. 15 oz.)Finish / 仕上Cherry color. U, C, A, B, G, K, J modelsBlack color. U, C, A, B, G, J modelsIncluded Accessories / 付属品Power Cabl

19、e x 1 pc (U, C, G, K, J models), Speaker Cable (4 m) x2 pcs (J model), Pin Cable for Subwoofer (3 m) x 1 pc (J model),Non-skid Pad x 4 pcs, Remote Control x 1 pc, Battery (AA, R6,UM-3) x 2 pcs, Grounding Cable* Specifications are subject to change without notice due to productimprovements. 参考仕様外観予告変

20、更。U . U.S.A. modelC . Canadian modelA . Australian modelB . British modelG . European modelK . Korean modelJ. Japanese model6YST-SW1500YST-SW150011CB8CB7 Front Panel AssyAssyI DISASSEMBLY PROCEDURE / 分解手順（番号順部品取外。）AC電源、電源抜。1. Assy外方a. 4本外、Assy取外。 （Fig. 1） 取外六角 （3mm） 使用。b. CB7、CB8外。 （Fig. 1） (Remove

21、parts in the order as numbered.)Disconnect the power cable from the AC outlet.1. Removal of Front Panel Assya. Remove 4 screws (1) and then remove the Front PanelAssy. (Fig. 1)*Use an Allen wrench (3mm) to unscrew the FrontPanel Assy.b. Remove CB7 and CB8. (Fig. 1)Fig. 22. Assy外方a. 12本外、Assy取外。 （Fig

22、. 2） 取外箇所、矢印 （） 印刷。 組立際、損傷無確認、漏発生組立。b. CB1、CB3、CB6外。 （Fig. 2）2. Removal of Rear Panel Assya. Remove 12 screws (2) and then remove the RearPanel Assy. (Fig. 2)*Arrow marks () are printed to identify the screws tobe removed.*When assembling the Rear Panel Assy, check toensure that the gasket is not da

23、maged so as toprevent air leakage from occurring.b. Remove CB1, CB3 and CB6. (Fig. 2)Fig. 122Rear Panel AssyAssyCB1CB3CB67YST-SW1500YST-SW1500333443Fig. 3取付方法a. 差込。b. 上布当木置。c. 木使用、打込。 打込際、傷付十分注意。 Installation of emblema. Put the emblem into the cabinet at the specifiedposition.b. Place a piece of cl

24、oth/wood on top of the emblem.c. Using a mallet, hammer the emblem in place throughthe cloth/wood.*Use special care not to cause damage to theemblem or cabinet while hammering the emblem.3. Removal of Drivera. Remove 8 screws (3) and then remove the BaseAssy. (Fig. 3)b. Remove 8 screws (4) and then

25、remove the Driver.(Fig. 3)3. 外方a. 8本外、Assy取外。（Fig. 3）b. 8本外、取外。 （Fig. 3）I SERVICE POSITIONP.C.B.場合 電源接続部持上、Assy下枕木敷。 次2区間、用延長使用。MAIN (2) P.C.B. CB1 POWER (2) P.C.B. CB8:V9956600 (6P 700mm)MAIN (1) P.C.B. CB3 POWER (2) P.C.B. CB7:V9956700 (11P 750mm)When checking the P.C.B.:To help lift the power cab

26、le connecting section of therear panel, put the supporting wood under the rearpanel assembly.Use the extension cable for servicing for the following 2sections.MAIN (2) P.C.B. CB1 POWER (2) P.C.B. CB8:V9956600 (6P 700mm)MAIN (1) P.C.B. CB3 POWER (2) P.C.B. CB7:V9956700 (11P 750mm)Fig. 4Extension Cabl

27、e延長Supporting Wood枕木CB3CB7CB1CB8MAIN (2) P.C.B.MAIN (1) P.C.B.POWER (2) P.C.B.8YST-SW1500YST-SW1500I REPAIR PROCEDURES / 修理手順部故障場合、SW電源部故障可能性、部SW電源部切離修理推奨。1. 部SW電源部切離MAIN （1） P.C.B.CB4、CB5外。部SW電源部切離。2. 部 （MAIN （1） P.C.B.） 修理主部品故障判定方法下示。FET （Q29、Q30、Q34、Q35、Q4144）G-S間抵抗値故障有無判定。故障場合、G-S間抵抗値0近値示。故障場合、G

28、-S間抵抗値以下通。Q29、Q30、Q34、Q35：約820Q4144：約115 （Q22A、Q22C、Q28A、Q28C、Q33A、Q33C、Q39A、Q39C)B-E間B-C間特性故障有無判定。When the power amplifier has failed, it is possible that theswitching power supply section has also failed. Therefore,it is recommended to separate the power amplifier sectionand the switching power su

29、pply section for the repair work.1. Separating power amplifier sectionand switching power supply sectionDisconnect CB4 and CB5 of the MAIN (1) P.C.B.,thereby the power amplifier section and the switchingpower supply section will be separated.2. Repairing power amplifier (MAIN (1)P.C.B.)Described bel

30、ow is the method to diagnose trouble ofthe major parts.FET (Q29, Q30, Q34, Q35, Q4144)Check the resistance between G and S to determine ifany trouble exists.If a trouble has occurred, the G-S resistance shouldindicate a value close to 0.If no trouble exists, the G-S resistance value should beas foll

31、ows.Q29, Q30, Q34, Q35: about 820Q4144: about 115Transistors (Q22A, Q22C, Q28A, Q28C, Q33A, Q33C,Q39A, Q39C)Use the diode characteristics between B and E, B andC to determine if any trouble exists.動作確認1） 直流安定化電源用意。負荷抵抗必要。2） 直流安定化電源出力電圧+30V、-30V設定。3） 直流安定化電源+B端子JY201、-B端子JY202GND端子GND接続。(Fig. A）4） R1

32、70GND接続。(Fig. A）5） 信号発生器出力端子100uF 16V +5.6k介J57 （=Q16） 接続、GND端子GND接続。6） 信号発生器出力信号正弦波、100Hz設定。7） 直流安定化電源ON。8） 信号発生器出力徐上、出力波形観測。9） 出力40Vp-p出力波形歪、OK判断。動作確認後直流安定化電源、信号発生器100uF 16V取外。Operation check1) Prepare a stabilized DC power source. No loadresistance is needed.2) Set the output voltage of the stabi

33、lized DC powersource to +30V and -30V.3) Connect the +B terminal of the stabilized DC powersource to JY201, -B terminal to JY202 and GNDterminal to GND. (Fig. A)4) Connect the probe of the oscilloscope to R170 andGND. (Fig. A)5) Connect the output terminal of the signal generatorto J57 (=base of Q16

34、) via 100F 16V +5.6k and theGND terminal to GND.6) Set the output signal of the signal generator to sinewave, 100Hz.7) Turn on the stabilized DC power source.8) Raise the output level of the signal generatorgradually and check the output waveform on theoscilloscope.9) If the output waveform is not d

35、istorted up to 40Vp-poutput level, the operation is OK.After confirming operation, disconnect the stabilizedDC power source, signal generator and 100F 16V.GDFETSBCETR9YST-SW1500YST-SW1500Fig. AQ42Q44Q35Q30Q29Q34Q43Q41Q20Q28AR170Q39CQ22AQ33AQ28CGNDJY201JY202OscilloscopeMAIN (1) P.C.B.J57Q16Q22C Q39AQ

36、33CCB4CB5Stabilized DC Power Source直流安定化電源Signal Generator信号発生器Set to -30.-30V設定Set to +30.+30V設定100uF16V5.6k GNDGND OUTGround side of probe側10YST-SW1500YST-SW15003. SW電源部 （POWER （1） P.C.B.） 修理危険回避C102、C103電源OFF後高電圧維持危険。修理前100 5W程度抵抗端子間接続強制放電。、修理後同様100 5W程度抵抗端子間接続強制放電。故障部品交換主部品故障判定方法下記示。 （Q51、52）故障場

37、合、C-E間抵抗値0近値示動作確認1） TP3-TP4間接続。2） 主電源ON。3） STANDBY/ONON。RY2ON、SW電源起動。4） 波形観測。5） 約12秒後、RY2OFF、同時波形消。異常、CB5外保護回路動作。確、CB5接続STANDBY/ONON。RY2ON、SW電源起動。波形観測。RY2OFF確認。動作確認後主電源OFF。注意動作確認時、側高電位危険、絶対他部品等接続。同様、筐体触気付。3. Repairing switching power supplysection (POWER (1) P.C.B.)To avoid possible danger:C102 and

38、C103 are dangerous, for a high voltage isretained there even after the power is turned off.Before the repair work, connect about 100 5Wresistance between terminals of the capacitor to forceddischarging.After the repair work, also perform forced dischargingby connecting about 100 5W resistance betwee

39、nterminals of the capacitor.Replacing faulty partsDescribed below is the method to diagnose trouble ofthe major parts.Transistors (Q51, 52)If a trouble exists, the C-E resistance value should beclose to 0.Operation check1) Connect the probe of the oscilloscope between TP3and TP4.2) Turn on the POWER

40、 switch.3) Turn on the STAND/BY switch. RY2 turns on and theSW power source is activated.4) Check the waveform on the oscilloscope.5) About 12 seconds later, RY2 turns off and thewaveform on the oscilloscope disappears at thesame time.This does not mean any abnormality but indicatesthat the protecti

41、on circuit is at work because CB5 isdisconnected.In order to check this, connect CB5 and turn on theSTANDBY/ON switch. Then RY2 turns on and theSW power source is activated. Watch the waveformon the oscilloscope to check that RY2 does not turnoff.After operation checkBe sure to turn off the POWER sw

42、itch.CautionNever connect the oscilloscope to any other part afterthe operation check because it is dangerous with a highpotential applied to its ground side.Also, use care not to touch the frame of theoscilloscope due to the same reason.11YST-SW1500YST-SW1500Fig. BTP3C103C102Q51Q52TP4RY2Oscilloscop

43、ePOWER (1) P.C.B.Ground side of probe側Caution: Use the AC range.注意：AC使用。12YST-SW1500YST-SW1500I ADJUSTMENT / 調整部動作確認部修理場合、下記回路図中AB波形共正常必確認。用意物信号発生器 （100Hz, 正弦波）86負荷抵抗 （2現象）接続1） 信号発生器出力信号L/MONO端子接続。2） 接続端子外負荷抵抗接続。3） CH1端子HOT側図中AB、GND側本体GND接続。4） CH2HOT端子、負荷抵抗接続赤側接続。注意：、CH2GND端子接続。設定1） 信号発生器正弦波、100Hz 、

44、出力最小設定。2） YST-SW1500電源ON。3） CH2観測出力70Vp-p信号発生器出力YST-SW1500 調整。波形観測上記設定、CH1 観測波形判断。Confirmation of Power Amp sectionoperationFor the power amplifier section which has been repaired, itis absolutely necessary to confirm that a correct waveformis obtained at points indicated by A and B in the schematic

45、diagram according to the following procedure.Devices requiredSignal generator (100Hz sine wave)8 or 6 load resistorOscilloscope (dual trace type)Connection1) Connect the output signal from the signal generator tothe L/MONO terminal.2) Disconnect the connector terminal connected to thespeaker unit an

46、d 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 main unit.4) Connect the oscilloscope CH2 input to the red side ofthe connector cable, which is connected with the loadresistor.At th

47、is time, the GND terminal of CH2 must be leftunconnected.Setting1) Set the signal generator to the sine wave, 100Hz andminimum output level settings.2) Turn on the power to YST-SW1500.3) Adjust the output level of the signal generator and thevolume of YST-SW1500 so that the output levelobserved at o

48、scilloscope CH2 is 70Vp-p.Waveform observationWith the settings made as described above, observe thewaveform obtained at CH1 for judgment.Normal正常Point B (Anode of D35)V: 50V/divH: 2 msec/divDC range1: 1 probePoint A (Cathode of D38)V: 50V/divH: 2 msec/divDC range1: 1 probeAbnormal+B or GND levelbec

49、omesconstant異常場合：+B GND 一定Abnormal-B or GND levelbecomesconstant異常場合：B GND一定13YST-SW1500YST-SW1500調整無負荷、無信号状態電源投入後1 2 分間行。調整箇所規格 （DC）TP1 TP2 両端VR130mV150mVIdling AdjustmentTo stabilize operation of the amplifier, turn ON the powerwith no input signal and wait for 1 or 2 minutes in nonloaded conditio

50、n before the adjustment.Adjust VR1 so that the voltage between terminals TP1 andTP2 is DC 30mV to 150mV.Q42Q44Q35Q30Q29Q34Q43Q41Q20D38D35TP2TP1MAIN (1) P.C.B.Point BPoint ADC 30mVto 150mVPoint BDC 30 mVto 150 mVPoint A14YST-SW1500YST-SW1500AUTO STANDBY動作確認設定1） 主電源OFF。2） /感度 切 設定。3） 信号発生器出力L/MONO端子接続