Yamaha-AS-700-Service-Manual 电路图 维修手册.pdf

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1、A-S700 1 0 111 7 SERVICE MANUAL 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 specifi cally YAMAHA Products, are already known and understood

2、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 specifi ed. For these reasons, we advise a

3、ll 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 fi rm does not constitute authorization, certifi cation or recognition of any appli

4、cable 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.

5、Modifications are, therefore, inevitable and specifi cations are subject to change without notice or obligation to retrofi t. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING: Static discharges can destroy expensive components. Discharge any static el

6、ectricity 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. CONTENTS TO SERVICE PERSONNEL .2 IM

7、PEDANCE SELECTOR .3 FRONT PANEL .3 REAR PANELS .46 REMOTE CONTROL PANEL .7 SPECIFICATIONS / 参考仕様 .78 INTERNAL VIEW .9 SERVICE PRECAUTIONS / 時注意事項 .10 DISASSEMBLY PROCEDURES / 分解手順 .1016 AMP ADJUSTMENT / 部調整 .1718 SELF-DIAGNOSTIC FUNCTION / （自己診断機能） .1925 IC DATA .2628 BLOCK DIAGRAM .29 PRINTED CIRCU

8、IT BOARDS .3043 PIN CONNECTION DIAGRAMS .44 SCHEMATIC DIAGRAMS .4547 REPLACEMENT PARTS LIST .4959 REMOTE CONTROL .60 INTEGRATED AMPLIFIER animate 08.10 P.O.Box 1, Hamamatsu, Japan Copyright 2008 All rights reserved. This manual is copyrighted by YAMAHA and may not be copied or redistributed either i

9、n print or electronically without permission. A-S700 RadioFans.CN 收音机爱 好者资料库 2 A-S700 A-S700 This product contains chemicals known to the 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 F

10、OR ANY REASON 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

11、food. 1. Critical Components Information Components having special characteristics are marked 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 t

12、hat all exposed conductive surfaces are properly insulated from supply circuits. Meter impedance should be equivalent to 1500 ohms shunted by 0.15 F. “CAUTION” “F251, F252: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.” CAUTION F251, F252: REPLACE WITH SAM

13、E TYPE 8A, 125V FUSE. ATTENTION F251, F252: UTILISER UN FUSIBLE DE RECHANGE DE MME TYPE DE 8A, 125V. 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 30 40程度高、 合 使用。 All of the P.C.B.s installed in this unit and solder joints are soldered using

14、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 temperature of the le

15、ad 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. TO SERVICE PERSONNEL Leakage current must not exceed 0.5mA. Be sure to test for leakage with the AC plug in both polari- ties. WALL OUTLET EQUIPMENT UNDER TES

16、T AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! About lead free solder / 無鉛 RadioFans.CN 收音机爱 好者资料库 3 A-S700 A-S700 IMPEDANCE SELECTOR WARNING: Do not change the setting of the IMPEDANCE SELECTOR switch when the unit power is switched on, as doing so may damage t

17、he unit. IMPEDANCE SELECTOR A-S700 (U, R, T, K, A, B, G, L, J models) FRONT PANEL RadioFans.CN 收音机爱 好者资料库 4 A-S700 A-S700 A-S700 (U model) REAR PANELS A-S700 (R model) A-S700 (T model) 5 A-S700 A-S700 A-S700 (K model) A-S700 (A model) A-S700 (B model) 6 A-S700 A-S700 A-S700 (L model) A-S700 (G model

18、) A-S700 (J model) 7 A-S700 A-S700 REMOTE CONTROL PANEL RAS7 SPECIFICATIONS / 参考仕様 Audio Section / 部 Minimum RMS Output Power (Power Amp. Section) / 定格出力（部） (20 Hz to 20 kHz) 8 ohms, 0.019 % THD . 90 W + 90 W 6 ohms, 0.03 % THD . 105 W + 105 W Dynamic Power / (IHF) 8/6/4/2 ohms .135/160/200/240 W Ma

19、ximum Output Power / 実用最大出力 (1 kHz) R, L, J models (10 % THD, 8/6 ohms, JEITA) . 140/160 W B, G models (0.7 % THD, 4 ohms) .160 W IEC Output Power B, G models (1 kHz, 0.019 % THD, 8 ohms) .105 W Power Band Width / (0.03 % THD, 50 W, 8 ohms) .10 Hz to 50 kHz Damping Factor / 1 kHz, 8 ohms .240 or mor

20、e Maximum Input Signal / 最大許容入力 (1 kHz, 0.019 % THD) PHONO .70 mV CD, etc. .2.2 V Frequency Response / 周波数特性 CD, etc. (20 Hz to 20 kHz) .0 0.5 dB CD DIRECT AMP ON (10 Hz to 100 kHz) .0 1.0 dB RIAA Equalization Deviation / RIAA 偏差 PHONO .0 0.5 dB Total Harmonic Distortion / 全高調波歪率 (20 Hz to 20 kHz) P

21、HONO to OUT (REC) (3 V) .0.008 % or less CD, etc. to SP OUT (50 W, 8 ohms) .0.012 % or less Signal to Noise Ratio / 信号対雑音比 (IHF-A Network) PHONO (5 mV input shorted) .87 dB or more CD DIRECT AMP (200 mV input shorted) .110 dB or more Residual Noise / 残留 (IHF-A Network) CD DIRECT AMP ON .30 V PURE DI

22、RECT ON .110 V Gain Tracking Error / GAIN (0 to -60 dB) . 2 dB or less Control Section / 部 Input Sensitivity/Input Impedance / 入力感度入力 PHONO . 3.0 mV/47 k-ohms CD, etc. . 200 mV/47 k-ohms Output Level/Output Impedance / 出力電圧 REC level . 200 mV/1.2 k-ohms Headphone Output/Impedance / 出力 (Input 1 kHz,

23、200 mV, 8 ohms, 0.015 % THD) CD, etc. .0.47 V/470 ohms Channel Separation / (5.1 k-ohms input shorted) CD, etc. .65/50 dB or more Tone Control Characteristics / 特性 BASS Boost/Cut (50 Hz) . 10 dB Turnover frequency .350 Hz TREBLE Boost/Cut (20 kHz) . 10 dB Turnover frequency .3.5 kHz Continuous Loudn

24、ess Control / Attenuation / 最大補正率 (1 kHz) . -30 dB RAS7 WQ06690 8 A-S700 A-S700 DIMENSIONS / 寸法図 Unit: mm (inch) 単位 ： mm（） General / 総合 Power Supply / 電源電圧 U model . AC 120 V, 60 Hz R model .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

25、 Hz B, G models . AC 230 V, 50 Hz L models .AC 220/230-240 V, 50/60 Hz J model . AC 100 V, 50/60 Hz Power Consumption / 消費電力 U model . 260 W, 360 VA R, T, K, A, B, G, L models .260 W J model .205 W Standby Power Consumption / 待機時消費電力 .0.1 W Maximum Power Consumption R model 6 ohms, 1 kHz, 10 % THD .

26、650 W AC Outlets / AC 2 switched outlets U model .100 W max. total / 0.8 A max. total R model .50 W max. total / 0.2 A max. total T, G models .100 W max. total / 0.4 A max. total L, J models .100 W max. total 1 switched outlet A, B models .100 W max. / 0.4 A max. U .U.S.A. and Canadian models R .Gen

27、eral model T.Chinese model K .Korean model A .Australian model B .British model G .European model L.Singapore model J .Japanese model Dimensions (W x H x D) / 寸法（幅 高 奥行） .435 x 151 x 382 mm (17-1/8 x 5-15/16 x 15-1/16) Weight / 質量 . 10.9 kg (24 lbs.) Finish / 仕上 Black color .U, R, T, K, A, B, G, L,

28、J models Silver color .U, 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) 151 (5-15/16) 21 (15/16) 130 (5-1/8) 395 (15

29、-9/16) 382 (15-1/16) 339.5 (13-3/8) 22 (7/8) 20.5 (13/16) 290 (11-7/16) 9 A-S700 A-S700 Top view Front view Power Transformer MAIN (2) P.C.B. MAIN (3) P.C.B. MAIN (8) P.C.B. MAIN (5) P.C.B. (R, L models) MAIN (4) P.C.B. MAIN (7) P.C.B. MAIN (1) P.C.B. MAIN (6) P.C.B. FUNCTION (1) P.C.B. OPERATION (1

30、0) P.C.B. FUNCTION (2) P.C.B. OPERATION (3) P.C.B. OPERATION (4) P.C.B. OPERATION (2) P.C.B. OPERATION (11) P.C.B. OPERATION (5) P.C.B. OPERATION (6) P.C.B. OPERATION (7) P.C.B. OPERATION (8) P.C.B. OPERATION (1) P.C.B. OPERATION (9) P.C.B. 14 12 13 34567891 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

31、 18 19 20 21 22 21011 161517 19 18 202122 INTERNAL VIEW 10 A-S700 A-S700 DISASSEMBLY PROCEDURES / 分解手順 (Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Top Cover a. Remove 4 screws ( ), 4 screws ( ) and screw ( ). (Fig. 1) b. Remove the top cover.

32、 (Fig. 1) 2. Removal of Front Panel * Prepare an Allen hex socket screwdriver (2 mm) for removal of knob unit. a. Remove screw ( ), screw ( ) and then remove the frame top. (Fig. 1) b. Loosen lock set screw to remove the knob VOL unit. (Fig. 1) c. Loosen lock set screw to remove the knob SEL unit. (

33、Fig. 1) d. Remove 4 knob TCs. (Fig. 1) e. Remove 2 knob SP13s. (Fig. 1) f. Remove 7 screws ( ). (Fig. 1) g. Remove the front panel forward gradually using care not to cause damage the keys. (Fig. 1) * When installing the knob VOL/SEL unit, it is necessary to position them as specified. (Refer to “Wh

34、en install- ing the knob VOL/SEL unit”.) （番号順部品取外。 ） AC 電源、電源抜。 1. 外方 a. 4 本、 4 本、 1 本外 。 （Fig. 1） b. 取外。 （Fig. 1） 2. 外方 取外場合、6 角穴用 （2 mm）準備。 a. 1 本、 1 本外、 TOP 取外。 （Fig. 1） b. 止緩、 VOL 取外。 （Fig. 1） c. 止緩、 SEL 取外。 （Fig. 1） d. TC 4 個取外。 （Fig. 1） e. SP13 2 個取外。 （Fig. 1） f. 7 本外。 （Fig. 1） g. 各傷前方 取外。 （Fi

35、g. 1） VOL/SEL 取付場合、決 位置合必要。 （“ VOL/SEL 取付場合” 参照） SERVICE PRECAUTIONS / 時注意事項 Safety measures Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. Note that positions indicated below are dange

36、rous even after the power is turned off because an electric charge remains and a high voltage continues to exist there. Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. The time re- quired for discharging is

37、 about 30 seconds. 1. C141 on MAIN (1) P.C.B. 2. C142 on MAIN (1) P.C.B. Refer to “PRINTED CIRCUIT BOARDS: MAIN (1) P.C.B.”. 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（1）P.C.B. C141 2. MAIN（1）P.C.B. C142 “PRINTED CIRCUIT B

38、OARDS：MAIN（1）P.C.B.” 参照 。 11 A-S700 A-S700 Top cover Frame top TOP An Allen hex socket screwdriver 6角穴用 2mm Lock set screw 止 Knob VOL unit VOL Knob SEL unit SEL Knob TC TC Knob SP13 SP13 Front panel Fig. 1 12 A-S700 A-S700 VOL 取付場合： a. VOLUME（VR805）左回。 （Fig. 2） b. VOL “VOLUME MIN” 位 置合、取付。 （Fig. 2） * 、止締。 c. 0.5 0.75 mm 程度隙間 。 （Fig. 2） d. 止締。 （Fig. 2） e. 取付後、次動作確認。 VOL 左右回、 擦？ VOL 右回、 VOL VOLUME MAX 位置合 ？ VOL 左回、 VOL VOLUME MIN 位置合 ？ SEL 取付場合： a. INPUT（SW803）位置上回 。 （Fig. 2） b. SEL 止位置上取付 。 （Fig. 2） * 、止締。 c. 0.5 0.75 mm 程度隙間 。 （Fig. 2） d. INPUT（SW803）位置止位置合 、止締。 （Fig. 2） e. 取付後、次動作確認。 SE