YAMAHA YST-SW315 维修电路原理图.pdf

《YAMAHA YST-SW315 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《YAMAHA YST-SW315 维修电路原理图.pdf（23页珍藏版）》请在收音机爱好者资料库上搜索。

1、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

2、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 s

3、ervice 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 estab

4、lish 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, inevitab

5、le 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

6、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. I CONTENTS TO SERVICE PERSONNEL . 2 SPECIFICATIONS / 参考仕様 . 3 INTERNAL VIEW .

7、 3 BLOCK DIAGRAM. 4 REAR PANELS . 45 DISASSEMBLY PROCEDURES / 分解手順 . 67 ADJUSTMENTS / 調整 . 810 PRINTED CIRCUIT BOARD . 1112 SCHEMATIC DIAGRAM . 13 PARTS LIST. 1523 YST-SW315 100855 P.O.Box 1, Hamamatsu, Japan SERVICE MANUAL SUBWOOFER SYSTEM YST-SW315 YST-SW315 2 YST-SW315 WALL OUTLET EQUIPMENT UNDER

8、 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

9、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 WI

10、TH SAME TYPE 6A, 125V FUSE.” CAUTION F1: REPLACE WITH SAME TYPE 6A, 125V FUSE. ATTENTION F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 6A, 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 solde

11、r 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

12、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/f

13、lux 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

14、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 + s

15、ilver + 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 use

16、d, 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-SW315 3 YST-SW315 I SPECIFICATIONS / 参考仕様

17、 Type / 型式 . Advanced Yamaha Active Servo Technology Output Power / 出力. 250 W (100 Hz, 5 , 10% T.H.D.) Input Sensitivity / 入力感度 INPUT1 (SP) .1 V (50 Hz, 250 W / 5 , L + R) INPUT2 (PJ) .50 mV (50 Hz, 250 W / 5 , L + R) Input Impedance / 入力 INPUT1 (SP) . 2.2 k INPUT2 (PJ) . 12 k Frequency Response / 再

18、生周波数帯域 .20 Hz to 160 Hz Driver / .10 (25 cm) cone, Magnetic Shielding Type Input Section / 入力部 INPUT1. Speaker Terminal INPUT2. RCA Pin Jack Operation Section / 操作部 Front Panel.STANDBY/ON Switch, B.A.S.S. Switch, Volume Control, High Cut Control, LED Indicator Rear Panel .Power Switch, Auto Standby

19、Switch (HIGH / LOW / OFF), Phase Switch (NORM / REV), Voltage Selector (R, T, K models only) Power Supply / 電源 U, C models .AC 120 V, 60 Hz A model .AC 240 V, 50 Hz B, G models .AC 230 V, 50 Hz R, T, K models .AC 240 / 220 / 120 / 110 V, 50/60 Hz J model. AC 100 V, 50/60 Hz Power Consumption / 消費電力

20、U, C, A, B, G, R, T, K models . 80 W J model. 100 W Standby Power Consumption / 待機時消費電力 . 0.5 W Dimension / 外形寸法 (W x H x D) .350 x 430 x 382 mm (13-3/4 x 16-15/16 x 15-1/16) Weight / 質量 . 19 kg (41 lbs. 14 oz.) Finish Cherry Color. U, C, A, B, G, R, T, K, J models Black Color . U, C, A, B, G, R, T,

21、 J models Accessories / 付属品 Subwoofer Cable (3 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. modelC . Canadian model A . Australian modelB . British model G . European mod

22、elR . General model T . Chinese modelK . Korean model J. Japanese model DIMENSIONS / 寸法図 I INTERNAL VIEW 1 1 MAIN (8) P.C.B. 2 MAIN (4) P.C.B. 3 MAIN (2) P.C.B. 4 MAIN (10) P.C.B. 5 MAIN (3) P.C.B. 6 MAIN (1) P.C.B. 7 MAIN (5) P.C.B. 8 MAIN (11) P.C.B. 9 POWER TRANSFORMER 0 MAIN (6) P.C.B. 23 7890 4

23、56 350(13-3/4) 382(15-7/16) 355(14) 27 (1-1/16) Unit: mm (inch) 単位 ： mm （） 350(13-3/4)80 (3-1/8)430(16-15/16) YST-SW315 4 YST-SW315 IC11A IC11B IC7A AUTO STANDBY SW2 AUTO POWER ON/OFF CIRCUIT VR1 VOLUME L.P.F. 6dB/oct B.P .F. Q201204 L.P.F. 12dB/oct 3 61 58 IC7B IC3 Q22, 23 4 3 2 D202 D9 D201 Q206 2

24、 HIGH CUT VR2 PROTECTION H L OFF OFF L H R252 C227 TIMER IC201 MUSIC SENSOR IC4 8 4 6 3 7 Q205 + REGULATOR IC202 Q209 L R + + INPUT 1 L R INPUT 2 L R + + OUTPUT IC10A 7 87 6 SW1 PHASE SELECT IC10B 4 3 2 B.A.S.S. SELECT SW3 + PRE DRIVE Q210 Q28, 29 POWER DRIVE Q16A/C, 26A/C LIMITER RY1 IC8 Q25 D12, 1

25、3, 19 Q1821 D6, 14, 33, 34 0.1 Q1C, 17C, 24A Q27, 31 PS AMP Q1A, 17A, 24C Q30, 32 PS AMP B +B H.P.F. 12dB/oct + + +12 12 REGULATOR POWER SUPPLY D2 IC6 IC1 F1 POWER SW5 +B B POWER SUPPLY D1 STANDBY/ON SW4 (R, T, K models only) REGULATOR Q207, 208 D203 SUB POWER SUPPLY D11 RY2 T1 + DRIVER 6 7 A.N.I.C

26、Q37, 38 D36 I BLOCK DIAGRAM I REAR PANELS A modelU, C models YST-SW315 5 YST-SW315 B, G models T model J model K model R model YST-SW315 6 YST-SW315 I DISASSEMBLY PROCEDURE / 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 nu

27、mbered.) 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. 2 Fig. 1 2. Assy外方 a.

28、4本外。 （Fig. 2） 取外六角 （2.5mm） 使用。 b. Assy引出、CB4外。 （Fig. 2） 2. Removal of Front Panel Assy a. Remove 4 screws (3). (Fig. 2) * Use an Allen wrench (2.5mm) to unscrew the Front Panel Assy. b. Pull out the front panel assy and disconnect the connector (CB4). (Fig. 2) Driver 2 2 Base 11 Connector CB4 Front

29、Panel Assy Assy 3 3 YST-SW315 7 YST-SW315 Fig. 3 3. Assy外方 a. 8本外。 （Fig. 3） 取外矢印 （） 印刷。 b. Assy引出。 （Fig. 3） c. 2本外。 （Fig. 3） 取外矢印 （） 印刷。 d. 外。 （Fig. 3） e. CB9、CB10外。 （Fig. 3） 3. Removal of Rear Panel Assy a. Remove 8 screws (4). (Fig. 3) * Screws (4) are identified with arrow marks (). b. Pull out t

30、he rear panel assy. (Fig. 3) c. Remove 2 screws (5). (Fig. 3) * Screws (5) are identified with arrow marks (). d. Remove the cover. (Fig. 3) e. Disconnect the connectors (CB9 and CB10). (Fig. 3) When Checking the P.C.B.: Connect all the connectors removed during disassembly back to the original posi

31、tions. Spread cloth first and place the rear panel assy on it. (Fig. 4) P.C.B.場合 分解際外元通接続 。 布敷、上Assy 置。 （Fig. 4） Fig. 4 Rear Panel Assy Assy 4 5 5 4 Cover to CB4 to CB9 to CB10 Rubber Sheet and Cloth 布 Note: Replace this Bush (V7324600) with the new article when remove the Rear Panel Assy. 注意 ： Assy

32、外場合、 （V7324600） 新品交換。 YST-SW315 8 YST-SW315 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 fol

33、lowing 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

34、 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 te

35、rminal 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 un

36、it 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. Normal Point A(Cathode of D29) V : 20V/divH : 2 msec/div DC range1 : 1 probe Normal Point B(Anode of D31) V : 20 V/d

37、ivH : 2 msec/div DC range1 : 1 probe Abnormal +B or GND level Becomes constant Abnormal -B or GND level Becomes constant 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

38、。 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。 異常 -BGND 一定。 異常 +BGND 一定。 正常 B点 （D31） V：20 V/divH：2 msec/div DC1：1 0V 0V 正常 A点 （D29） V：20 V/divH：2 msec/div DC1：1 YST-SW315 9 YST-SW315 G Idling Adjustment To stabilize operation of the ampl

39、ifier, 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 TP11 and TP12 is 10 mV to 200 mV. If it exceeds 200 mV, open (cut off) R172. G Confirmation of AUTO STANDBY operation Setting 1) Turn

40、 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 R252 on the MAIN (3) P.C.B. (Refer to page 11) 3) Connect the output signal from the signal generator to the INPUT 2 / L/MONO terminal of the unit. 4)

41、 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 5 to 10 seconds. 3

42、) 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 o

43、ff. After confirmation 1) Turn off the power switch. 2) Disconnect the 10k resistor connected to both ends of R252. 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 。 TP11TP12端子間電圧10 mV 200 mV 確認。 電圧200 mV越場合、R172 。 動作確認 設定 1） 主電源OFF。 2） 動作確認時間短縮、MAIN （3） P.C.B. R252両端10 k抵抗取付。 （11 参照） 3） 信号発生器出力信号本機入力2L/MONO端子 接続。 4

44、） 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） 。510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） R252両端取付抵抗外。 YST-SW315 10 YST-SW315 Schematic Diagram / 回路図 Test Points

45、 / POWER DRIVEPS AMP IDLING CURRENT ADJ DC 10 mV to 200 mV A B DRIVER DC 10 mV to 200 mV Point APoint B D29 TP11 (+) TP12 (-) D31 MAIN (2) P.C.B. MAIN (1) P.C.B. Idling Current Adjustment R172 ABCDEFGHIJ 1 2 3 4 5 6 7 YST-SW315 11 PHASE DRIVER REVNORMHIGHOFFLOW INPUT2 INPUT1/OUTPUT LR AUTO STANDBY MAIN (10) P.C.B. MAIN (3) P.C.B