Yamaha-YSTSW-325-Service-Manual电路原理图.pdf

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1、I CONTENTS TO SERVICE PERSONNEL . 2 SPECIFICATIONS / 参考仕様 . 3 INTERNAL VIEW . 4 REAR PANELS . 45 DISASSEMBLY PROCEDURES / 分解手順 . 67 ADJUSTMENTS / 調整 . 89 BLOCK DIAGRAM. 10 PRINTED CIRCUIT BOARD . 1112 SCHEMATIC DIAGRAM . 13 PARTS LIST. 1522 TOP VIEWFRONT VIEW IMPORTANT NOTICE This manual has been pr

2、ovided 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 fo

3、llow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required should be performed by a

4、n 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 applicable technical capabilities, or establish a principle-agent relationship of a

5、ny 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 are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to cha

6、nge without notice or obligation to retrofit. 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 the ground buss

7、 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. 2005 All rights reserved. P.O.Box 1, Hamamatsu, Japan YST-SW325 05.07 100961 SERVICE MANUAL SUBWOOFER SYSTEM YST-SW32

8、5 YST-SW325 2 YST-SW325 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE I TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally i

9、nstalled. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. GMeter impedance should be equivalent to 1500 ohms shunted by 0.15F. “CAUTION” “F1: FOR CONTIN

10、UED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 3A, 125V FUSE.” CAUTION F1: REPLACE WITH SAME TYPE 3A, 125V FUSE. ATTENTION F1: 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 pol

11、arities. WARNING: CHEMICAL CONTENT NOTICE! The solder used in the manufacturing process except soldering of the P.C.B. assy 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 We

12、lfare 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 FOR ANY REA- SON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, d

13、o not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. About Lead Free Solder / 無鉛 Side A Side B SMT REFLOW Process MI FLOW Process Solder Dip 無鉛種類、修理時 下記無鉛使用推

14、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30 40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 the repair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + c

15、opper) Sn + Zn + Bi (tin + zinc + bismuth) Caution: 1. As the melting point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the lead solder, be sure to use a soldering iron suitable to each solder. 2. If lead solder must be used, be sure to remove lead free s

16、older from each terminal section of the parts to be replaced and from the area around it completely before soldering, or make sure that the lead free solder and lead solder melt together fully. The P.C.B.s installed in this unit are soldered using the following solder. 本機搭載基板付使用 下記通。 MAIN P.C.B. SID

17、E A / A 面 - SIDE B / B 面 Lead Free Solder / 無鉛 YST-SW325 3 YST-SW325 315 (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 II Output Power / 出力 (100 Hz, 5 ohms, 10% T.H.D.). 15

18、0 W Dynamic Power / (5 ohms). 170 W Input Sensitivity / 入力感度 (50 Hz, 150 W/5 ohms, L+R) INPUT1 (SP) . 1.5 V INPUT2 (PJ) . 60 mV Input Impedance / 入力 INPUT1 (SP) . 2.2 k-ohms INPUT2 (PJ) . 12 k-ohms Frequency Response / 再生周波数帯域 . 25 Hz to 180 Hz Driver / .20 cm (8) cone, Magnetic Shielding Type Input

19、 Section / 入力部 INPUT1.Speaker Terminal INPUT2. RCA Pin Jack Operation Section / 操作部 Top Panel .STANDBY/ON Switch, B.A.S.S. Switch, High Cut Filter Switch, Volume Control, High Cut Control, LED Indicator Rear Panel .Power Switch, Auto Standby Switch (HIGH / LOW / OFF), Phase Switch (NORM / REV), Volt

20、age Selector (R, L models) Power Supply / 電源 U, C models . AC 120 V, 60 Hz R, L models .AC 110 120 / 220 240 V, 50/60 Hz T model . AC 220 V, 50 Hz K model . AC 220 V, 60 Hz A model . AC 240 V, 50 Hz B, G models . AC 230 V, 50 Hz J model. AC 100 V, 50/60 Hz Power Consumption / 消費電力 U, C, R, T, K, A,

21、B, G, L models . 70 W J model. 60 W Standby Power Consumption / 待機時消費電力. 0.5 W Dimensions / 外形寸法 (W x H x D). 315 x 380 x 374 mm (12-7/16 x 15 x 14-3/4) Weight / 質量. 13.0 kg (28 lbs. 10 oz.) Finish Cherry Color . U, C, R, T, K, A, B, G, L, J models Black Color . U, C, R, T, K, A, B, G, L, J models A

22、ccessories / 付属品 Speaker cable (4 m) x 2 (J model), Subwoofer Cable (5 m) x 1 (J model), Nonskid Pad x 4 * Specifications are subject to change without notice due to product improvements. 参考仕様外観予告変更。 U . U.S.A. modelA . Australian model C . Canadian modelB . British model R . General modelG . Europe

23、an model T . Chinese modelL. Singapore model K . Korean modelJ . Japanese model DIMENSIONS / 寸法図 Advanced YST Advanced Yamaha Active Servo Technology is a unique system to let the speaker unit have a perfectly linear motion by the speaker and amplifier combination. 、組合振動板 効率動最大音圧時 大幅改善。 QD-Bass Tech

24、nology QD-Bass (Quatre Dispersion Bass) technology is a Yamaha unique technology to radiate the sound efficiently in four horizontal direction. QD QD （） 、低音 4水平方向効率放射独自 。 YST-SW325 4 YST-SW325 I REAR PANELS R modelU, C models Front SideRear Side 1 MAIN (8) P.C.B. Driver MAIN (3) P.C.B. MAIN (4) P.C.

25、B. MAIN (2) P.C.B. MAIN (1) P.C.B. MAIN (10) P.C.B. Power Transformer MAIN (6) P.C.B. MAIN (7) P.C.B. MAIN (9) P.C.B. (R, L models) MAIN (5) P.C.B. 1 2 3 4 5 6 7 8 9 0 A B 234567 8B A90 I INTERNAL VIEW YST-SW325 5 YST-SW325 T model B, G models J modelL model K model A model YST-SW325 6 YST-SW325 Dri

26、ver 2 2 Base 11 Connector 2. 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。 （Fig. 2） 取外矢印 （） 印刷。 h. 取外。 （Fig. 2） 2. Removal of Rear Panel Assy a. Remove 8 screws (3). (Fig.

27、 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

28、cted 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。 （Fig. 1） b. 4本外、取外 。 （Fig. 1） c. 端子接続 外。 （Fig. 1） (Remove parts in the order

29、as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Driver a. 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 of the Driver. (Fig. 1) Fig. 1 YST-SW325 7 YST

30、-SW325 3 43 Rear Panel Assy ASSY Rear Cover 4 5 CB2 CB3CB3 MAIN (8) P.C.B. Control Unit MAIN (3) P.C.B. Rubber Sheet and Cloth 布 Rear Panel Assy ASSY Control Unit Fig. 3 When Checking the P.C.B.: Assemble Rear Panel Assy and Control Unit. Connect all the connectors removed during dis- assembly back

31、to the original positions. Spread cloth first and place the Rear Panel Assy 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. 2 YST-SW325 8 YST-SW325 I ADJUSTMENTS / 調整 G Confirmation of Power Amp operation For the power amplifier which has been repaired, it is

32、 absolutely necessary to confirm that a correct waveform is obtained at points indicated by A and B in the schematic diagram according to the following procedure. Devices required Signal generator 8 or 6 load resistor Oscilloscope (dual trace type) Connection 1) Connect the output signal from the si

33、gnal generator to the input terminal of the unit. 2) Disconnect the connector terminal connected to the speaker unit and reconnect it to the load resistor. 3) Connect the HOT side of the oscilloscope CH1 probe to the point A or B indicated in the figure and the GND side to the GND of the main unit.

34、(Fig. 1) 4) Connect the oscilloscope CH2 input to the red side of the connector cable, which is connected with the load resistor. At this time, the GND terminal of CH2 must be left unconnected. Setting 1) Set the signal generator to the sine wave, 100 Hz and minimum output level settings. 2) Set the

35、 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 the volume of the unit so that the output level observed at oscilloscope CH2 is 28 Vp-p. Waveform observation With the settings made as described above, observe the w

36、aveform obtained at CH1 for judgment. Point A (Cathode of D34) V : 20 V/divH : 2 msec/div DC range1 : 1 probe Point B (Anode of D33) V : 20 V/divH : 2 msec/div DC 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

37、点接続、GND側本機GND 接続。 （Fig. 1） 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-p 28 Vp-p YST-SW325 9 ABCDEFGHIJ 1 2 3 4 5 6 7 G Confirmation of AUTO STANDBY operation Setting 1) Turn off the powe

38、r switch located on the rear panel. 2) In order to shorten the time required for operation check; connect a 10k resistor at both ends of R72 on the MAIN (2) P.C.B. (Fig. 2) 3) Connect the output signal from the signal generator to the INPUT 2 / L/MONO terminal of the unit. 4) Set the signal generato

39、r for the sine wave of 100Hz, 8mV. 5) Turn on the power switch located on the rear panel. Confirmation 1) 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 changes to red after 4 to 5 seconds. 3) Turn off the STANDBY/ON

40、 switch. The display LED goes off. 4) Set the AUTO STANDBY switch to the HIGH position. 5) Turn on the STANDBY/ON switch. The display LED lights up (green) and its color remains unchanged even after time have elapsed. 6) Turn off the STANDBY/ON switch. The display LED goes off. After confirmation 1)

41、 Turn off the power switch. 2) Disconnect the 10k resistor connected to both ends of R72. 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

42、/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。 確認終了後 1） 主電源切。 2） R72両端取付10 k抵抗外。 R72 10k R72 10 k Fig. 1 D33 D34 AB GND Fig. 2 MAIN (2) P.C.B. MAIN (10) P.C.B. DRIVER PS AMP PS AMP PS AMP PS AMP PROTECTION A B 2 ABCDEFGHIJ 1 3 4 5 7 YST-SW325 6

43、10 IC1A IC1B IC3B PASSMOVIEMOVIE MUSICMUSIC SW7 HIGH CUT FILTER SW3 B.A.S.S. PASS OFFOFF AUTO STANDBY SW2 AUTO POWER ON/OFF CIRCUIT POWER INDICATOR VR1 VOLUME L.P.F. 6dB/oct L.P.F. 12dB/oct 3 61 57 IC4A Q23, 28, 30, 34 3 3 4 8 6 10 11 13 2 1 D6 D10 D2 GR D3 GR Q4 2 HIGH CUT VR2 PROTECTION H L OFF OF

44、F L H R72 C39 TIMER IC7 MUSIC SENSOR IC6 8 4 6 3 7 Q9 + REGULATOR IC8 Q3 L R + + INPUT 1 L/MONO R INPUT 2 L R + + OUTPUT IC2A 3 27 4 SW1 PHASE SELECT POWER AMP LIMITER RY1 IC8 IC5 Q5, 6 0.1 Q24C, 32PS AMP Q24A, 33PS AMP B +B H.P.F. 12dB/oct + + + +15 +B 15 B REGULATOR POWER SUPPLY D21 Q18 Q19 F1 POW

45、ER SW5 STANDBY/ON SW4 (R, L models) REGULATOR Q1, 2 D4 SUB POWER SUPPLY D1 RY2 T1 DRIVER 5 6 A.N.I.C Q10, 11 Q29, 31 + + + IC3A 3 2 1 H.P.F. 12dB/oct + IC4B 5 6 7+ NORM REV + + IC9 I BLOCK DIAGRAM YST-SW325 11 A 1 2 3 4 5 6 7 BCDEFGHIJ SIG E AUT +15 -15 SIG E AUT +15 -15 MAIN (8) P. C. B. MAIN (1) P. C. B. MAIN (4) P. C. B. MAIN (3) P. C. B. VOLUMEHIGH CUT HIGH CUT FILTERB.A.S.S.STANDBY/ON POWER INDICATOR OUTPUT / INPUT 1INPUT 2PHASE NORMREV MAIN (2) (CB1) MAIN (