Yamaha-YSTSW-225-Service-Manual电路原理图.pdf

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. 1523 YST-SW225 TOP VIEWFRONT VIEW IMPORTANT NOTICE This 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 therefore not been restated. WARNING:Failure to follow 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 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 applicable technical capabilities, or establish 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 are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change 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 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. 04.07 100895 P.O.Box 1, Hamamatsu, Japan SERVICE MANUAL SUBWOOFER SYSTEM YST-SW225 YST-SW225 2 YST-SW225 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 installed. 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 ohm shunted by 0.15F. “CAUTION” “F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.” CAUTION F1: REPLACE WITH SAME TYPE 4A, 125V FUSE. ATTENTION F1: 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 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 Welfare 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, do 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. 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。 All P.C.B.s used for this product are soldered with lead free 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 the repair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) 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 solder 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. About Lead Free Solder / 無鉛 YST-SW225 3 YST-SW225 290 (11-7/16) 350 (13-3/4) 290 (11-7/16)56.6 (2-3/16) 2.8 (1/8) 349.4 (13-3/4) Unit : mm (inch) 単位 : mm () I SPECIFICATIONS / 参考仕様 Type / 型式 .Advanced Yamaha Active Servo Technology Output Power / 出力 (100 Hz, 5 ohms, 10% T.H.D.). 120 W Dynamic Power / (5 ohms). 150 W Input Sensitivity / 入力感度 INPUT1 (SP) . 1.5 V INPUT2 (PJ) . 70 mV Input Impedance / 入力 INPUT1 (SP) .2.2 kohms INPUT2 (PJ) .12 kohms Frequency Response / 再生周波数帯域 . 28 Hz to 200 Hz Driver / .8 (20 cm) cone, Magnetic Shielding Type Input 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), Voltage Selector (L, R models only) Power Supply / 電源 U, C models . AC 120 V, 60 Hz R, L models .AC 240 220 / 120 110 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, B, G, L models . 65 W J model. 50 W Standby Power Consumption / 待機時消費電力. 0.5 W Dimensions / 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.) Finish Cherry Color .C, R, T, K, G, L, J models White Color . R, T, K, A, B, G, L, J models Silver Color. U, C, T, A, B, G, L models Black Color .U, C, T, A models Accessories / 付属品 Subwoofer Cable (5 m) x 1 (J model), Speaker cable (4 m) x 2 (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 . European 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 Technology 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-SW225 4 YST-SW225 I REAR PANELS R modelU, C models 123 456 7 8 9 1 MAIN (8) P.C.B. 2 Driver 3 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 Transformer 9 MAIN (5) P.C.B. Front SideRight Side I INTERNAL VIEW YST-SW225 5 YST-SW225 T model B, G models J modelL model K model A model YST-SW225 6 YST-SW225 Driver 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. 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 Assy a. 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 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 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.) 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-SW225 7 YST-SW225 3 43 Rear Panel Assy Assy Control Unit Rear Cover 4 5 5 CB2 CB3 Rubber Sheet and Cloth 布 Fig. 3 When Checking the P.C.B.: Rear Panel Assy and Control Unit are assembled. Connect all the connectors removed during disassembly back to the original positions. Spread cloth first and place the rear panel assy 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-SW225 8 YST-SW225 I ADJUSTMENTS / 調整 G Confirmation of Power Amp operation For the power amplifier which has been repaired, it is 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 signal 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. 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 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 waveform 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-SW225 9 ABCDEFGHIJ 1 2 3 4 5 6 7 PS AMP PS AMP PS AMP PS AMP POWER DRIVE POWER DRIVE DRIVER IDLING CURRENT ADJIDLING CURRENT ADJ. . DC 10 mV to 300 mV IDLING CURRENT ADJ. A B Schematic Diagram / 回路図G Idling Adjustment To stabilize operation of the amplifier, turn ON the power with no input signal and wait for 2 to 3 minutes in non loaded condition before the adjustment. Confirm that the voltage across the terminals TP1 and TP2 is 10 mV to 300 mV. If it exceeds 300 mV, open (cut off) R110. G Confirmation of AUTO STANDBY operation Setting 1) Turn off the power 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. (Refer to page 12) 3) Connect the output signal from the signal generator to the 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. 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 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) Turn off the power switch. 2) Disconnect the 10k resistor connected to both ends of R72. 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） 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 A B DC 10 mV to 300 mV MAIN (10) P.C.B. MAIN (1) P.C.B. R110 D34 TP1 TP2 D33 IDLING CURRENT ADJ. GND 2 ABCDEFGHIJ 1 3 4 5 7 YST-SW225 6 10 IC1A IC1B IC3B PASSMOVIEMOVIE MUSICMUSIC SW7 HIGH CUT FILTER SW3 B.A.S.S. PASS ONON AUTO STANDBY SW2 AUTO POWER ON/OFF CIRCUIT VR1 VOLUME L.P.F. 6dB/oct L.P.F. 12dB/oct 3 61 57 IC4A Q23, 28, 30, 34 3 2 1 D6 D10 D2 GR D3 GR Q4 2 HIGH CUT VR2 PROTECTION H L OFF OFF L H R72 C39 TIMER IC7 MUSIC SENSOR IC6 8 4 6 3 7 Q9 + REGULATOR IC8 Q3 L R + + INPUT 1 L R INPUT 2 L R + + OUTPUT IC2A 3 27 4 SW1 PHASE SELECT + PRE DRIVE Q1317 Q20, 21 POWER DRIVE Q25, 26 LIMITER RY1 IC8 IC5 Q58 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 POWER SW5 STANDBY/ON SW4 (R, L models only) REGULATOR Q1, 2 D4 SUB POWER SUPPLY D1 RY2 T1 DRIVER 5