Yamaha-AS2000-int-sm维修电路原理图.pdf

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1、I CONTENTS TO SERVICE PERSONNEL . 2 FRONT PANEL . 2 REAR PANELS . 35 REMOTE CONTROL PANELS. 6 SPECIFICATIONS / 参考仕様. 7 INTERNAL VIEW . 8 SERVICE PRECAUTIONS / 時注意事項 . 9 DISASSEMBLY PROCEDURES / 分解手順. 918 AMP ADJUSTMENT / 部調整. 1920 UPDATING FIRMWARE / 書込. 2127 SELF-DIAGNOSTIC FUNCTION / （自己診断機能）. 283

2、0 IC DATA . 3134 PIN CONNECTION DIAGRAMS. 3536 BLOCK DIAGRAM. 37 PRINTED CIRCUIT BOARDS. 3858 SCHEMATIC DIAGRAMS. 5966 REPLACEMENT PARTS LIST . 6787 REMOTE CONTROL. 8889 101077 SERVICE MANUAL STEREO AMPLIFIER 2008 All rights reserved. This manual is copyrighted by YAMAHA and may not be copied or red

3、istributed either in print or electronically without permission. P.O.Box 1, Hamamatsu, Japan 08.01 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 mo

4、re 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

5、 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 consti

6、tute 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

7、 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

8、 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 app

9、ly power to the unit. A-S2000 A-S2000 RadioFans.CN 收音机爱 好者资料库 2 A-S2000 A-S2000 I FRONT PANEL A-S2000 (U, C, R, T, K, A, B, G, L, J models) WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! This product contains chemicals known to the

10、 State of California to cause cancer, or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes

11、 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. 1. Critical Components Information Components having special characteristics are marked s and must be replaced with parts having

12、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 ohms s

13、hunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. 本機搭載基板付接合 部無鉛付。 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3040 程度高、合 使用。 All of the P.C.B.s installed in this unit and solder joints are so

14、ldered using the lead free solder. 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: As the melting point temperat

15、ure 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. About lead free solder / 無鉛 I TO SERVICE PERSONNEL RadioFans.CN 收音机爱 好者资料库 3 A-S2000 A-S2000 I REAR PANELS A-S2000 (U, C models) A-S2000 (R model

16、) A-S2000 (T model) 4 A-S2000 A-S2000 A-S2000 (B model) A-S2000 (K model) A-S2000 (A model) 5 A-S2000 A-S2000 A-S2000 (G model) A-S2000 (L model) A-S2000 (J model) 6 A-S2000 A-S2000 I REMOTE CONTROL PANELS RAS21 (U, C, R, T, A, B, G, L models) RAS22 (K, J models) 7 A-S2000 A-S2000 I Audio Section /

17、部 Minimum RMS Output Power (Power Amp. Section) / 定格出力 （部） (20 Hz to 20 kHz, 0.02 % THD) 8 ohms .90 W + 90 W 4 ohms . 150 W + 150 W Dynamic Power / (IHF) 8/6/4/2 ohms . 105/135/190/220 W Maximum Output Power B, G models (1 kHz, 0.7 % THD, 4 ohms) . 160 W Maximum Useful Output Power (JEITA) R, T, K,

18、L models (1 kHz, 10 % THD) 8 ohms . 120 W 4 ohms . 190 W Dynamic Headroom / 8 ohms . 0.67 dB IEC Output Power B, G models (1 kHz, 0.02 % THD) 8 ohms . 95 W 4 ohms . 155 W Damping Factor / (1 kHz, 8 ohms) . 160 Maximum Input Signal / 最大許容入力 CD, etc. . 2.8 V PHONO (1 kHz) MM . 120 mV MC . 7 mV Frequen

19、cy Response / 周波数特性 CD, etc. Flat position, 5 Hz to 100 kHz . +0 / -3.0 dB Flat position, 20 Hz to 20 kHz . +0 / -0.3 dB RIAA Equalization Deviation / RIAA偏差 (20 Hz to 20 kHz) PHONO MM . 0.5 dB MC. 0.5 dB Total Harmonic Distortion / 全高調波歪率 (20 Hz to 20 kHz) CD BAL to SP OUT (90 W, 8 ohms) . 0.01 % C

20、D, etc. to SP OUT (90 W, 8 ohms) . 0.015 % PHONO MM (2 V, to REC) . 0.005 % MC (2 V, to REC) . 0.05 % Intermodulation Distortion / 混変調歪率 (Rated output, 8 ohms) CD, etc. to SP OUT . 0.02 % Signal to Noise Ratio / 信号対雑音比 (IHF-A Network) (Input shorted) CD, etc. (150 mV) . 98 dB PHONO MM (5 mV) . 93 dB

21、 MC (500 V). 85 dB Residual Noise / 残留 (IHF-A Network) FRONT L/R SP OUT . 33 V or less I Control Section / 部 Input Sensitivity/Input Impedance / 入力感度入力 CD, etc. . 150 mV/47 k-ohms PHONO MM . 2.5 mV/47 k-ohms MC. 100 V/50 ohms MAIN IN . 1 V/47 k-ohms Output Level/ Output Impedance / 入力電圧 REC OUT . 15

22、0 mV/1.5 k ohms PRE OUT . 1 V/1.5 k ohms Headphone Rated Output / 出力 1 kHz, 0.2 % THD, 32 ohms . 30 mW Channel Separation / (1 kHz/10 kHz) CD, etc. (5.1 k-ohms terminated) .74/54 dB or more PHONO (Input shorted, Vol: -30 dB) MM . 90/77 dB or more MC . 66/77 dB or more Tone Control Characteristics /

23、特性 BASS Boost/Cut (50 Hz) . 9 dB Turnover frequency. 350 Hz TREBLE Boost/Cut (20 Hz) . 9 dB Turnover frequency. 3.5 kHz Audio Muting / . -20 dB (approx.) I SPECIFICATIONS / 参考仕様 U . U.S.A. model C . Canadian model R . General model T . Chinese model K . Korean model A . Australian model B . British

24、model G . European model L . Singapore model J. Japanese model I General / 総合 Power Supply / 電源電圧 U, C models .AC 120 V, 60 Hz R, L models.AC 110/120/220/230-240 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

25、/60 Hz Power Consumption / 消費電力 U, C, R, T, K, A, B, G, L models . 350 W J model . 220 W Idling Power Consumption / 時消費電力 . 80 W Off-state Power Consumption / OFF時消費電力 . 0 W Dimensions (W x H x D) / 寸法 （幅高奥行） . 435 x 137 x 465 mm (17-1/8” x 5-3/8” x 18-5/16”) Weight / 質量 . 22.7 kg (50 lbs.) Finish /

26、 仕上 Black color . U, C, R, T, K, A, B, G, L, J models Silver color . U, C, R, T, K, A, B, G, L, J models Accessories / 付属品 Remote control x 1, Battery (R6, AA, UM-3) x 2, Power cable (2 m) x 1 *Specifications are subject to change without notice due to product improvements. 参考仕様外観予告変更。 435 (17-1/8)

27、137 (5-3/8)465 (18-5/16) 418 (16-7/16) 25 (1) 22 (7/8) 16 (5/8) 3 (1/8) 121 (4-3/4) DIMENSIONS / 寸法図 Unit: mm (inch) 単位：mm （） 8 A-S2000 A-S2000 I INTERNAL VIEW 1 FRONT (14) P.C.B. (R, L models) 2 FUNCTION (3) P.C.B. 3 FRONT (13) P.C.B. 4 MAIN (2) P.C.B. 5 FUNCTION (2) P.C.B. 6 POWER TRANSFORMER 7 MA

28、IN (3) P.C.B. 8 MAIN (1) P.C.B. 9 FRONT (12) P.C.B. 0 FRONT (11) P.C.B. A FRONT (9) P.C.B. B FRONT (2) P.C.B. C FRONT (1) P.C.B. D FRONT (3) P.C.B. E FRONT (6) P.C.B. F FRONT (5) P.C.B. G FRONT (4) P.C.B. H FRONT (7) P.C.B. I FRONT (8) P.C.B. J BALANCE P.C.B. K FUNCTION (1) P.C.B. L FRONT (10) P.C.B

29、. 235796 GFE 0 A JKL IH BCD 148 Top View Front View Rear View A-S2000 9 I DISASSEMBLY PROCEDURES / 分解手順 (Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Panel Side L/R a. Remove 2 screws (1), 2 coned disc spring L and 2 washers side. (Fig. 1) b. L

30、ift the panel side L a little and release 3 hooks. Then remove the panel side L. (Fig. 1) c. Remove 2 screws (2), 2 coned disc spring L and 2 washers side. (Fig. 1) d. Lift the panel side R a little and release 3 hooks. Then remove the panel side R. (Fig. 1) 2. Removal of Top Cover a. Remove 7 screw

31、s (3), 2 screws (4) and 2 screws (5). (Fig. 1) b. Remove the top cover. (Fig. 1) 3. Removal of Front Panel *Prepare a hexagonal wrench (2 mm) for removal of knob unit. a. Loosen lock set screw to remove the knob VOL unit. (Fig. 1) b. Loosen lock set screw to remove the knob SEL unit. (Fig. 1) c. Loo

32、sen each lock set screw to remove 3 knob TC unit. (Fig. 1) d. Remove 8 screws (6). (Fig. 1) e. Set the “POWER ON/OFF” switch to the ON position. f.Set the “PHONO MM/MC” switch to the MM position. g. Remove the front panel forward gradually using care not to cause damage the switches. (Fig. 1) （番号順部品

33、取外。） AC電源、電源抜。 1. L/R外方 a. 12本外、L2個 2個外。 （Fig. 1） b. L少持上、3所外 、L取外。 （Fig. 1） c. 22本外、L2個 2個外。 （Fig. 1） d. R少持上、3所外 、R取外。 （Fig. 1） 2. 外方 a. 37本、42本、52本外。 （Fig. 1） b. 取外。 （Fig. 1） 3. 外方 取外場合、6角 （2 mm） 準備。 a. 止緩、VOL取外。 （Fig. 1） b. 止緩、SEL取外。 （Fig. 1） c. 止緩、TC3個取外 。 （Fig. 1） d. 68本外。 （Fig. 1） e. “POWER O

34、N/OFF” ON。 f. “PHONO MM/MC” MM。 g. 各傷注意 前方取外。 （Fig. 1） Panel side L L Panel side R R Washer side Washer side Coned disc spring L L Coned disc spring L L Front panel Top cover 6 6 3 1 3 4 5 2 Hook Hook POWER ON / OFF switch POWER ON / OFF PHONO ON / OFF switch PHONO ON / OFF Hook Knob VOL unit VOL He

35、xagonal wrench 6角 Knob SEL unit SEL Knob TC unit TC 2mm Lock set screw 止 Fig. 1 I SERVICE PRECAUTIONS / 時注意事項 安全対策 製品内部高電圧部分危険。修理 際、絶縁性手袋使用安全対策行 。 下記箇所電源OFF後電荷残、高電圧 維持危険。 修理作業前放電用抵抗 （5 k/10 W） 下記箇所端子 間接続放電。放電所用時間約30 秒間。 1. MAIN （3） P.C.B.C308 2. MAIN （3） P.C.B.C309 3. MAIN （3） P.C.B.C335 4. MAIN （3） P.C.B.C336 “PRINTED CIRCUIT BOARDS：MAIN （3） P.C.B.” 参 照。 Safety measures Some internal parts in this product contain high volt- ages and are dangerous. Be sure to take safety mea- sures during servicing, such as wearing insulating gloves. Note that positions indicated below are dangerous ev