Yamaha-YSTSW-1500-Service-Manual电路原理图.pdf

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1、100828 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 the

2、refore 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 tha

3、t 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, o

4、r 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, i

5、nevitable 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 accum

6、ulated 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. P.O.Box 1, Hamamatsu, Japan I CONTENTS TO SERVICE PERSONNEL . 2 FRONT

7、PANEL . 2 REAR PANELS . 34 SPECIFICATIONS. 5 DISASSEMBLY PROCEDURES / 分解手順 . 67 SERVICE POSITION. 7 REPAIR PROCEDURES / 修理手順. 811 ADJUSTMENT / 調整. 1214 IC DATA . 15 BLOCK DIAGRAM. 16 PRINTED CIRCUIT BOARD . 1721 IC BLOCK. 22 PIN CONNECTION DIAGRAM . 22 SCHEMATIC DIAGRAM . 23 PARTS LIST. 2537 REMOTE

8、CONTROL. 38 Parts List for Carbon Resistors . 39 SERVICE MANUAL SUBWOOFER SYSTEM YST-SW1500 YST-SW1500 V983440 2 YST-SW1500 YST-SW1500 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE I TO SERVICE PERSONNEL 1. Critical Components Information Components having special

9、 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

10、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 12A, 250V FUSE.” CAUTION F1: REPLACE WITH SAME TYPE 12A, 250V FUSE. ATTENTION F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYP

11、E DE 12A, 250V. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. I FRONT PANEL WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where ap

12、plicable) 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 W

13、HATSOEVER! 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. 3 YST-SW1

14、500 YST-SW1500 I REAR PANELS A model U, C models B model 4 YST-SW1500 YST-SW1500 G model J model K model 5 YST-SW1500 YST-SW1500 420 (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 Technology

15、 Output Power / 出力. 1kW (100 Hz, 5 ohms 10% T.H.D.) Input Sensitivity / 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-ohms INPUT2 (PJ) .12 k-ohms INPUT3 (

16、PJ) .12 k-ohms Frequency Response / 再生周波数帯域 .16 Hz to 160 Hz Driver / . 12 Cone, Magnetic Shielding Type Input Section / 入力部 INPUT1. Speaker Terminal INPUT2. Pin Jack INPUT3. Pin Jack I/O PORT . 3.5 mm Mini Jack Output Section / 出力部 H.P.F. OUT . Pin Jack I/O PORT . 3.5 mm Mini Jack Operation Section

17、 / 操作部 Front Panel.STANDBY/ON Switch, B.A.S.S. Switch, VOLUME Control, HIGH CUT Control Rear 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 Hz A model .AC 240 V, 50 Hz B, G models .AC 230 V, 50 Hz K model .AC 22

18、0 V, 50 Hz J model . AC 100 V, 50/60 Hz Power Consumption / 消費電力 U, C, A, B, G, K models . 250 W J model . 185 W Standby Power Consumption / 待機時消費電力 . 1.0 W Dimension / 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

19、, C, A, B, G, K, J models Black color. U, C, A, B, G, J models Included Accessories / 付属品 Power Cable x 1 pc (U, C, G, K, J models), Speaker Cable (4 m) x 2 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, Gro

20、unding Cable * 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 modelK . Korean model J. Japanese model 6 YST-SW1500 YST-SW1500 1 1 CB8 CB7 Front Panel Assy Assy I DISASS

21、EMBLY 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 parts in the order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Front Panel Assy a. Remove 4 screws (1) and then remove the Front Panel Assy. (Fig

22、. 1) *Use an Allen wrench (3mm) to unscrew the Front Panel Assy. b. Remove CB7 and CB8. (Fig. 1) Fig. 2 2. Assy外方 a. 12本外、Assy取外 。 （Fig. 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 Assy a. Remove 12 screws (2) and then remove the Rear Panel Assy. (Fig. 2)

23、 *Arrow marks () are printed to identify the screws to be removed. *When assembling the Rear Panel Assy, check to ensure that the gasket is not damaged so as to prevent air leakage from occurring. b. Remove CB1, CB3 and CB6. (Fig. 2) Fig. 1 2 2 Rear Panel Assy Assy CB1 CB3 CB6 7 YST-SW1500 YST-SW150

24、0 3 3 3 44 3 Fig. 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 emblem a. Put the emblem into the cabinet at the specified position. b. Place a piece of cloth/wood on top of the emblem. c. Using a mallet, hammer the emblem in place through the cloth/wood. *Use special care not to c

25、ause damage to the emblem or cabinet while hammering the emblem. 3. Removal of Driver a. Remove 8 screws (3) and then remove the Base Assy. (Fig. 3) b. Remove 8 screws (4) and then 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 POSITION P.C.B.場合 電源接続部持上 、Ass

26、y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 cable connecting section of the rear panel, put the supporting wood under the rear panel assembly. Use the

27、 extension cable for servicing for the following 2 sections. 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. 4 Extension Cable 延長 Supporting Wood 枕木 CB3 CB7 CB1 CB8 MAIN (2) P.C.B.MAIN (1) P.C.B. POWER (2) P.C.B. 8 YST

28、-SW1500 YST-SW1500 I 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-S間抵抗値以下通 。 Q29、Q30、Q34、Q35：約820 Q4144：約115 （Q22A、Q22C、Q28A、Q28C、Q

29、33A、 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 the switching power supply section has also failed. Therefore, it is recommended to separate the power amplifier section and the switching power supply section for the repair work. 1. Separating power am

30、plifier section and switching power supply section Disconnect CB4 and CB5 of the MAIN (1) P.C.B., thereby the power amplifier section and the switching power supply section will be separated. 2. Repairing power amplifier (MAIN (1) P.C.B.) Described below is the method to diagnose trouble of the majo

31、r parts. FET (Q29, Q30, Q34, Q35, Q4144) Check the resistance between G and S to determine if any trouble exists. If a trouble has occurred, the G-S resistance should indicate a value close to 0. If no trouble exists, the G-S resistance value should be as follows. Q29, Q30, Q34, Q35: about 820 Q4144

32、: about 115 Transistors (Q22A, Q22C, Q28A, Q28C, Q33A, Q33C, Q39A, Q39C) Use the diode characteristics between B and E, B and C 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） R170GND接続 。(Fig. A） 5） 信号発生器

33、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 check 1) Prepare a stabilized DC power source. No load resistance is needed. 2) Set the output voltage of the stabilized DC

34、 power source to +30V and -30V. 3) Connect the +B terminal of the stabilized DC power source to JY201, -B terminal to JY202 and GND terminal to GND. (Fig. A) 4) Connect the probe of the oscilloscope to R170 and GND. (Fig. A) 5) Connect the output terminal of the signal generator to J57 (=base of Q16

35、) via 100F 16V +5.6k and the GND terminal to GND. 6) Set the output signal of the signal generator to sine wave, 100Hz. 7) Turn on the stabilized DC power source. 8) Raise the output level of the signal generator gradually and check the output waveform on the oscilloscope. 9) If the output waveform

36、is not distorted up to 40Vp-p output level, the operation is OK. After confirming operation, disconnect the stabilized DC power source, signal generator and 100F 16V. GD FET S BC E TR 9 YST-SW1500 YST-SW1500 Fig. A Q42 Q44 Q35 Q30 Q29 Q34 Q43 Q41 Q20 Q28A R170 Q39CQ22A Q33A Q28C GND JY201 JY202 Osci

37、lloscope MAIN (1) P.C.B. J57 Q16 Q22C Q39A Q33C CB4 CB5 Stabilized 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 100uF 16V 5.6k GND GND OUT Ground side of probe 側 10 YST-SW1500 YST-SW1500 3. 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

38、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

39、 付。 3. Repairing switching power supply section (POWER (1) P.C.B.) To avoid possible danger: C102 and C103 are dangerous, for a high voltage is retained there even after the power is turned off. Before the repair work, connect about 100 5W resistance between terminals of the capacitor to forced disc

40、harging. After the repair work, also perform forced discharging by connecting about 100 5W resistance between terminals of the capacitor. Replacing faulty parts Described below is the method to diagnose trouble of the major parts. Transistors (Q51, 52) If a trouble exists, the C-E resistance value s

41、hould be close to 0. Operation check 1) Connect the probe of the oscilloscope between TP3 and TP4. 2) Turn on the POWER switch. 3) Turn on the STAND/BY switch. RY2 turns on and the SW power source is activated. 4) Check the waveform on the oscilloscope. 5) About 12 seconds later, RY2 turns off and t

42、he waveform on the oscilloscope disappears at the same time. This does not mean any abnormality but indicates that the protection circuit is at work because CB5 is disconnected. In order to check this, connect CB5 and turn on the STANDBY/ON switch. Then RY2 turns on and the SW power source is activated. Watch the waveform on the oscilloscope to check that RY2 does not turn off. After operation check Be sure to turn off the POWER switch. Caution Never connect the oscilloscope to any other part after the