Yamaha-AS700-int-sm(1) 维修电路原理图.pdf

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1、A-S7001 0 111 7SERVICE MANUALIMPORTANT NOTICEThis 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 by th

2、e 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 all YAM

3、AHA 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 applicable t

4、echnical 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. Modifica

5、tions 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 electricity

6、 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. CONTENTSTO SERVICE PERSONNEL .2IMPEDANCE SELE

7、CTOR .3FRONT PANEL .3REAR PANELS .46REMOTE CONTROL PANEL .7SPECIFICATIONS / 参考仕様 .78INTERNAL VIEW .9SERVICE PRECAUTIONS / 時注意事項 .10DISASSEMBLY PROCEDURES / 分解手順 .1016AMP ADJUSTMENT / 部調整 .1718SELF-DIAGNOSTIC FUNCTION / （自己診断機能） .1925IC DATA .2628BLOCK DIAGRAM .29PRINTED CIRCUIT BOARDS .3043PIN CONNE

8、CTION DIAGRAMS .44SCHEMATIC DIAGRAMS .4547REPLACEMENT PARTS LIST .4959REMOTE CONTROL .60INTEGRATED AMPLIFIERanimate 08.10P.O.Box 1, Hamamatsu, JapanCopyright 2008 All rights reserved.This manual is copyrighted by YAMAHA and may not be copied orredistributed either in print or electronically without

9、permission.A-S700RadioFans.CN 收音机爱 好者资料库2A-S700A-S700This 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 FOR ANY REASON WHATSOEVER!Avoid prolonged,

10、 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.1. Critical Components InformationComp

11、onents 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 that all exposed conductive surfaces are properl

12、y 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.”CAUTIONF251, F252: REPLACE WITH SAME TYPE 8A, 125V FUSE.ATTENTIONF251, F252: UTILISER

13、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 the lead free solder.Among some types of lead free solder cur

14、rently 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 lead free solder is about 30C to 40C (50F to 70F) higher than that

15、 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.WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEWARNING: CHEMICAL CONTEN

16、T NOTICE!About lead free solder / 無鉛RadioFans.CN 收音机爱 好者资料库3A-S700A-S700 IMPEDANCE SELECTORWARNING:Do not change the setting of the IMPEDANCE SELECTOR switch when the unit power is switched on, as doing so may damage the unit.IMPEDANCE SELECTORA-S700 (U, R, T, K, A, B, G, L, J models) FRONT PANEL4A-

17、S700A-S700A-S700 (U model) REAR PANELSA-S700 (R model)A-S700 (T model)5A-S700A-S700A-S700 (K model)A-S700 (A model)A-S700 (B model)6A-S700A-S700A-S700 (L model)A-S700 (G model)A-S700 (J model)7A-S700A-S700 REMOTE CONTROL PANELRAS7 SPECIFICATIONS / 参考仕様 Audio Section / 部Minimum RMS Output Power (Powe

18、r Amp. Section) /定格出力（部） (20 Hz to 20 kHz) 8 ohms, 0.019 % THD . 90 W + 90 W6 ohms, 0.03 % THD . 105 W + 105 WDynamic Power / (IHF) 8/6/4/2 ohms .135/160/200/240 WMaximum Output Power / 実用最大出力 (1 kHz) R, L, J models (10 % THD, 8/6 ohms, JEITA) . 140/160 WB, G models (0.7 % THD, 4 ohms) .160 WIEC Out

19、put Power B, G models (1 kHz, 0.019 % THD, 8 ohms) .105 WPower Band Width / (0.03 % THD, 50 W, 8 ohms) .10 Hz to 50 kHzDamping Factor / 1 kHz, 8 ohms .240 or moreMaximum Input Signal / 最大許容入力 (1 kHz, 0.019 % THD) PHONO .70 mVCD, etc. .2.2 VFrequency Response / 周波数特性 CD, etc. (20 Hz to 20 kHz) .0 0.5

20、 dBCD DIRECT AMP ON (10 Hz to 100 kHz) .0 1.0 dBRIAA Equalization Deviation / RIAA 偏差 PHONO .0 0.5 dBTotal Harmonic Distortion / 全高調波歪率 (20 Hz to 20 kHz)PHONO to OUT (REC) (3 V) .0.008 % or lessCD, etc. to SP OUT (50 W, 8 ohms) .0.012 % or lessSignal to Noise Ratio / 信号対雑音比 (IHF-A Network)PHONO (5 m

21、V input shorted) .87 dB or moreCD DIRECT AMP (200 mV input shorted) .110 dB or moreResidual Noise / 残留 (IHF-A Network)CD DIRECT AMP ON .30 VPURE DIRECT ON .110 VGain 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-o

22、hmsCD, etc. . 200 mV/47 k-ohmsOutput Level/Output Impedance / 出力電圧 REC level . 200 mV/1.2 k-ohmsHeadphone Output/Impedance / 出力 (Input 1 kHz, 200 mV, 8 ohms, 0.015 % THD) CD, etc. .0.47 V/470 ohmsChannel Separation / (5.1 k-ohms input shorted) CD, etc. .65/50 dB or moreTone Control Characteristics /

23、 特性 BASSBoost/Cut (50 Hz) . 10 dBTurnover frequency .350 HzTREBLEBoost/Cut (20 kHz) . 10 dBTurnover frequency .3.5 kHzContinuous Loudness Control / Attenuation / 最大補正率 (1 kHz) . -30 dBRAS7WQ066908A-S700A-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

24、, 60 HzR model .AC 110/120/220/230-240 V, 50/60 HzT model . AC 220 V, 50 HzK model . AC 220 V, 60 HzA model . AC 240 V, 50 HzB, G models . AC 230 V, 50 HzL models .AC 220/230-240 V, 50/60 HzJ model . AC 100 V, 50/60 HzPower Consumption / 消費電力 U model . 260 W, 360 VAR, T, K, A, B, G, L models .260 WJ

25、 model .205 WStandby Power Consumption / 待機時消費電力 .0.1 WMaximum Power Consumption R model 6 ohms, 1 kHz, 10 % THD .650 WAC Outlets / AC 2 switched outletsU model .100 W max. total / 0.8 A max. totalR model .50 W max. total / 0.2 A max. totalT, G models .100 W max. total / 0.4 A max. totalL, J models

26、.100 W max. total1 switched outletA, B models .100 W max. / 0.4 A max.U .U.S.A. and Canadian models R .General model T.Chinese modelK .Korean model A .Australian modelB .British model G .European modelL.Singapore modelJ .Japanese modelDimensions (W x H x D) / 寸法（幅 高 奥行） .435 x 151 x 382 mm (17-1/8 x

27、 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, J modelsSilver color .U, R, T, K, A, B, G, L, J modelsAccessories / 付属品 Remote control . x 1Battery (R6, AA, UM-3) . x 2Power cable (2 m) . x 1* Specifications are subject to change without notice due

28、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 (15-9/16)382 (15-1/16)339.5 (13-3/8)22(7/8)20.5(13/16)290 (11-7/16)9A-S700A-S700Top viewFront viewPower TransformerMAIN (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

29、.C.B.MAIN (1) P.C.B.MAIN (6) P.C.B.FUNCTION (1) P.C.B.OPERATION (10) 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.14121

30、33456789112345678910111213141516171819202122210111615171918202122 INTERNAL VIEW10A-S700A-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 Covera. Remove 4 screws ( ), 4 screws ( ) and screw ( ). (Fig. 1)b. Remov

31、e the top cover. (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

32、 SEL unit. (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

33、 to “When 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。 （Fig. 1） VOL/SEL

34、 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 dangerous even after

35、 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 about 30 seconds

36、.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. C1412. MAIN（1）P.C.B. C142“PRINTED CIRCUIT BOARDS：MAIN（1）P.C.B.” 参照。11A-S7

37、00A-S700Top coverFrame topTOPAn Allen hex socket screwdriver6角穴用2mmLock set screw止Knob VOL unitVOL Knob SEL unitSEL Knob TCTCKnob SP13SP13Front panelFig. 112A-S700A-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、

38、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。 SEL 左右回、擦？ When installing the knob VOL unit:a. Turn the VOLUME (VR805) counterclo

39、ckwise fully. (Fig. 2)b. Match the slit in the knob VOL unit with the “VOLUME MIN” position and install it in that state. (Fig. 2)* At this time, do not tighten the lock set screw.c. Keep about 0.5 mm to 0.75 mm clearance from the front panel to knob VOL unit. (Fig. 2)d. Tighten the lock set screw.

40、(Fig. 2)e. After installation, perform following checks. Turn the knob VOL unit both directions to check that it does not rub against the front panel. Turn the knob VOL unit clockwise fully and check that the slit in it matches with the VOLUME MAX position. Turn the knob VOL unit counterclockwise fu

41、lly and check that the slit in it matches with the VOLUME MIN position. When installing the knob SEL unit:a. Turn the INPUT (SW803) so that the cut in it comes at the top. (Fig. 2)b. Install the knob SEL unit with its lock set screw posi-tioned at the top. (Fig. 2)* At this time, do not tighten the

42、lock set screw.c. Keep about 0.5 mm to 0.75 mm clearance from the front panel to knob SEL unit. (Fig. 2)d. Match the lock set screw position with the cut in IN-PUT (SW803) and tighten the lock set screw.e. After installation, perform following checks. Turn the knob SEL unit in both directions to che

43、ck that it does not rub against the front panel.13A-S700A-S700Knob VOL unitVOL Slit Cut 位置Lock set screw止Lock set screw止VR805SW803VOLUME MIN.VOLUME MAX.Knob SEL unitSEL Front panel0.50.75mmFig. 214A-S700A-S700CB283CB802MAIN (4) P.C.B.FUNCTION (2) P.C.B.OPERATION (1) P.C.B.CB611CB606CB609Sub-chassis

44、unit 3. 外方a. 2 本外。 （Fig. 3）b. CB283、 CB606、 CB609、 CB611、 CB802 外。 （Fig. 3）c. 取外。 （Fig. 3）3. Removal of Sub-chassis Unita. Remove 2 screws ( ). (Fig. 3)b. Remove CB283,CB606,CB609,CB611and CB802. (Fig. 3)c. Remove the sub-chassis unit. (Fig. 3)Fig. 315A-S700A-S700Sub-chassis unit ChassisGround lead線

45、Rubber sheet and cloth布When checking the P.C.B.s: Put the rubber sheet and cloth over this unit. Then place the P.C.B.s upside down on the cloth and check it. (Fig. 4) Reconnect all cables (connectors) that have been discon-nected. Connect the ground point of the subchassis unit to the chassis with

46、a ground lead or the like. (Fig. 4)P.C.B. 場合： 本機上布敷、上 P.C.B. 裏返置。 （Fig. 4） 外（）接続。 線等接続。 （Fig. 4）Fig. 416A-S700A-S700Chassis coverRubber sheet and cloth布MAIN (1) P.C.B.When checking the P.C.B.s: Spread the rubber sheet and the cloth. Then place this unit on the cloth upside down. (Fig. 5) Remove 6 sc

47、rews ( ) and then remove the chassis cover. (Fig. 5)P.C.B. 場合： 布敷、 本機上下反転。 （Fig. 5） 6 本外取外。（Fig. 5）Fig. 517A-S700A-S700R111R112R135R136Cut offR175 (L ch)R176 (R ch)0.1mV10mV(L ch)0.1mV10mV(R ch)R135R175R176R111R112R136 AMP ADJUSTMENT / 部調整 電流確認1. 電源投入直後、 R111 135（L ch） 、 R112 136（R ch）端子間電圧測定、0.1 mV

48、 10.0 mV間確認。2. 電圧 10.0 mV 超場合、R175 （L ch） 、R176 （R ch）、電圧再確認。注意修理後 10.0 mV 超場合、抵抗前他故障箇所無一度調。3. 60 分後、電圧 0.2 mV 15.0 mV 確認。 CONFIRMATION OF IDLING CURRENT1. Right after power is turned on, confirm that the volt-age across the terminals of R111R135 (L ch) and R112R136 (R ch) are between 0.1 mV to 10.0

49、 mV.2. If measured voltage exceeds 10.0 mV, open (cut off) R175 (L ch), R176 (R ch) and reconfirm the voltage.AttentionIf the measured voltage exceeds 10.0 mV after repairing the power amplifier, check other parts again for any possible defect before cutting the resistor.3. Confirm that the voltage

50、is between 0.20 mV and 15.0 mV after 60 minutes.18A-S700A-S700L chR ch0.1 mV 10 mVR175R176R136R112R111R135Cut off0.1 mV 10 mVCut offMAIN (1)SCHEMATIC DIAGRAM19A-S700A-S700POWER indicatorOFFON/STANDBYOFFOFFONOFFOFFONOFFON1214. “POWER” switch2. “CD DIRECT AMP” switch3. “PURE DIRECT” switch SELF-DIAGNO