Yamaha-AS2000-int-sm(1) 维修电路原理图.pdf

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1、I CONTENTSTO SERVICE PERSONNEL . 2FRONT PANEL . 2REAR PANELS . 35REMOTE CONTROL PANELS. 6SPECIFICATIONS / 参考仕様. 7INTERNAL VIEW . 8SERVICE PRECAUTIONS /時注意事項 . 9DISASSEMBLY PROCEDURES / 分解手順. 918AMP ADJUSTMENT / 部調整. 1920UPDATING FIRMWARE /書込. 2127SELF-DIAGNOSTIC FUNCTION /（自己診断機能）. 2830IC DATA . 313

2、4PIN CONNECTION DIAGRAMS. 3536BLOCK DIAGRAM. 37PRINTED CIRCUIT BOARDS. 3858SCHEMATIC DIAGRAMS. 5966REPLACEMENT PARTS LIST . 6787REMOTE CONTROL. 8889101077SERVICE MANUALSTEREO AMPLIFIER 2008 All rights reserved.This manual is copyrighted by YAMAHA and may not be copied orredistributed either in print

3、 or electronically without permission.P.O.Box 1, Hamamatsu, Japan 08.01IMPORTANT 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 specifically YAMAHA Product

4、s, are alreadyknown 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 personalinjury, destruction of expensive components, and failure of the product to perform as specified.

5、 For these reasons,we advise all YAMAHA product owners that any service required should be performed by an authorizedYAMAHA 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

6、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, andservice departments of YAMAHA are continually striving to imp

7、rove YAMAHA products. Modifications are, therefore, inevitableand specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, pleasecontact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Dischar

8、ge any static electricity your body may haveaccumulated 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.A-S2000A-S2000RadioFans

9、.CN 收音机爱 好者资料库2A-S2000A-S2000I FRONT PANELA-S2000 (U, C, R, T, K, A, B, G, L, J models)WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEWARNING: CHEMICAL CONTENT NOTICE!This product contains chemicals known to the State of California to cause cancer, or birth defects or other

10、 reproductiveharm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANYREASON WHAT SO EVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or exposeeyes to solder/flux vapor!If you come in contact with sol

11、der or components located inside the enclosure of this product, wash your hands beforehandling food.1. Critical Components InformationComponents having special characteristics are marked sand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Meas

12、urement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohms shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leak

13、age 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 aresoldered using the lead free solder.Among some types of lead free solder currently available,i

14、t is recommended to use one of the following types for therepair 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 isabout 30C to 40C (50F to 70F) higher than that of the leadsolder, be s

15、ure to use a soldering iron suitable to each solder.About lead free solder / 無鉛I TO SERVICE PERSONNELRadioFans.CN 收音机爱 好者资料库3A-S2000A-S2000I REAR PANELSA-S2000 (U, C models)A-S2000 (R model)A-S2000 (T model)4A-S2000A-S2000A-S2000 (B model)A-S2000 (K model)A-S2000 (A model)5A-S2000A-S2000A-S2000 (G m

16、odel)A-S2000 (L model)A-S2000 (J model)6A-S2000A-S2000I REMOTE CONTROL PANELSRAS21(U, C, R, T, A, B, G, L models)RAS22(K, J models)7A-S2000A-S2000I Audio Section / 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 W4 ohms . 150 W + 150 WDynamic P

17、ower / (IHF)8/6/4/2 ohms . 105/135/190/220 WMaximum Output Power B, G models (1 kHz, 0.7 % THD, 4 ohms). 160 WMaximum Useful Output Power (JEITA) R, T, K, L models(1 kHz, 10 % THD)8 ohms . 120 W4 ohms . 190 WDynamic Headroom / 8 ohms . 0.67 dBIEC Output Power B, G models (1 kHz, 0.02 % THD)8 ohms .

18、95 W4 ohms . 155 WDamping Factor / (1 kHz, 8 ohms). 160Maximum Input Signal / 最大許容入力CD, etc. . 2.8 VPHONO (1 kHz) MM . 120 mVMC . 7 mVFrequency Response / 周波数特性CD, etc.Flat position, 5 Hz to 100 kHz . +0 / -3.0 dBFlat position, 20 Hz to 20 kHz . +0 / -0.3 dBRIAA Equalization Deviation / RIAA偏差 (20 H

19、z to 20 kHz)PHONO MM . 0.5 dBMC. 0.5 dBTotal Harmonic Distortion / 全高調波歪率 (20 Hz to 20 kHz)CD BAL to SP OUT (90 W, 8 ohms) . 0.01 %CD, 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

20、SP OUT . 0.02 %Signal to Noise Ratio / 信号対雑音比 (IHF-A Network) (Input shorted)CD, etc. (150 mV) . 98 dBPHONO MM (5 mV) . 93 dBMC (500 V). 85 dBResidual Noise / 残留 (IHF-A Network)FRONT L/R SP OUT . 33 V or lessI Control Section / 部Input Sensitivity/Input Impedance / 入力感度入力CD, etc. . 150 mV/47 k-ohmsPH

21、ONO MM . 2.5 mV/47 k-ohmsMC. 100 V/50 ohmsMAIN IN . 1 V/47 k-ohmsOutput Level/ Output Impedance / 入力電圧REC OUT . 150 mV/1.5 k ohmsPRE OUT . 1 V/1.5 k ohmsHeadphone Rated Output / 出力1 kHz, 0.2 % THD, 32 ohms . 30 mWChannel Separation / (1 kHz/10 kHz)CD, etc. (5.1 k-ohms terminated) .74/54 dB or morePH

22、ONO (Input shorted, Vol: -30 dB) MM . 90/77 dB or moreMC . 66/77 dB or moreTone Control Characteristics / 特性BASSBoost/Cut (50 Hz) . 9 dBTurnover frequency. 350 HzTREBLEBoost/Cut (20 Hz) . 9 dBTurnover frequency. 3.5 kHzAudio Muting / . -20 dB (approx.)I SPECIFICATIONS / 参考仕様U . U.S.A. modelC . Canad

23、ian modelR . General modelT . Chinese modelK . Korean modelA . Australian modelB . British modelG . European modelL . Singapore modelJ. Japanese modelI General / 総合Power Supply / 電源電圧U, C models .AC 120 V, 60 HzR, L models.AC 110/120/220/230-240 V, 50/60 HzT model .AC 220 V, 50 HzK model .AC 220 V,

24、60 HzA model .AC 240 V, 50 HzB, G models .AC 230 V, 50 HzJ model . AC 100 V, 50/60 HzPower Consumption / 消費電力U, C, R, T, K, A, B, G, L models . 350 WJ model . 220 WIdling Power Consumption / 時消費電力. 80 WOff-state Power Consumption / OFF時消費電力. 0 WDimensions (W x H x D) / 寸法 （幅高奥行）. 435 x 137 x 465 mm

25、(17-1/8” x 5-3/8” x 18-5/16”)Weight / 質量. 22.7 kg (50 lbs.)Finish / 仕上Black color . U, C, R, T, K, A, B, G, L, J modelsSilver color . U, C, R, T, K, A, B, G, L, J modelsAccessories / 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

26、 notice due to productimprovements. 参考仕様外観予告変更。435 (17-1/8)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 （）8A-S2000A-S2000I INTERNAL VIEW1 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 FUNCTI

27、ON (2) P.C.B.6 POWER TRANSFORMER7 MAIN (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

28、.B.L FRONT (10) P.C.B.235796GFE0AJKLIHBCD148Top ViewFront ViewRear ViewA-S20009I 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/Ra. Remove 2 screws (1), 2 coned disc spring L and 2washers side. (Fig. 1)b.

29、Lift the panel side L a little and release 3 hooks. Thenremove the panel side L. (Fig. 1)c. Remove 2 screws (2), 2 coned disc spring L and 2washers side. (Fig. 1)d. Lift the panel side R a little and release 3 hooks. Thenremove the panel side R. (Fig. 1)2. Removal of Top Covera. Remove 7 screws (3),

30、 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 ofknob 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. Loosen each lock se

31、t 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 carenot to cause damage the switches. (Fig. 1)（番号順部品取外。）AC電源、電源抜。1. L/R外方a.

32、 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 ON/OFF” ON。f. “PHONO MM/MC” MM。g. 各傷注意前方取外。 （Fi

33、g. 1）Panel side L LPanel side R RWasher sideWasher sideConed disc spring LLConed disc spring LLFront panelTop cover66313452HookHookPOWER ON / OFF switchPOWER ON / OFFPHONO ON / OFF switchPHONO ON / OFFHookKnob VOL unitVOLHexagonal wrench6角Knob SEL unitSELKnob TC unitTC2mmLock set screw止Fig. 1I SERVI

34、CE 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.C3082. MAIN （3） P.C.B.C3093. MAIN （3） P.C.B.C3354. MAIN （3） P.C.B.C336“PRINTED CIRCUIT BOARDS：MAIN （3） P.C.B.” 参照。Safety measuresSome internal parts in this

35、product contain high volt-ages and are dangerous. Be sure to take safety mea-sures during servicing, such as wearing insulatinggloves.Note that positions indicated below are dangerous evenafter the power is turned off because an electric chargeremains and a high voltage continues to exist there.Befo

36、re starting any repair work, perform discharge byconnecting a discharge resistor (5k-ohms/10W) be-tween terminals at following positions. The time re-quired for discharging is about 30 seconds.1. C308 on MAIN (3) P.C.B.2. C309 on MAIN (3) P.C.B.3. C335 on MAIN (3) P.C.B.4. C336 on MAIN (3) P.C.B.Ref

37、er to “PRINTED CIRCUIT BOARDS: MAIN (3) P.C.B.”.*When installing the knob unit, it is necessary to positionthem as specified. (Refer to “When installing the knobunit”.) 取付場合、決位置合必要。 （ 取付場合 参照）A-S200010 VOL取付場合：a. VOLUME （VR501） 左回。（Fig. 2）b. VOL “VOLUME MIN”位置合、取付。 （Fig. 2） 、止締。c. VOL0.50.75mm程度隙間。

38、（Fig. 2）d. VOLUME （VR501） 位置止位置合、止締。 （Fig. 2）e. 取付後、次動作確認。 VOL左右回、擦? VOL右回、VOL “VOLUMEMAX” 位置合? VOL左回、VOL “VOLUMEMIN” 位置合? SEL取付場合：a. INPUT （SW501） 位置上回。 （Fig. 2）b. SEL止位置上取付。 （Fig. 2） 、止締。c. SEL0.50.75mm程度隙間。 （Fig. 2）d. INPUT （SW501） 位置止位置合、止締。 （Fig. 2）e. 取付後、次動作確認。 SEL左右回、擦? TC取付場合： BASS、TREBLE、BA

39、LANCE取付方法同。例BALANCE取付方法記載。a. BALANCE （VR504） 左右回、中央位置合。 （Fig. 2） 左右回、中央位置一度止。b. TCBALANCE中央位置合、取付。 （Fig. 2） 、止締。c. TC0.50.75mm程度隙間。 （Fig. 2）d. TC止締。 （Fig. 2）G When installing the knob VOL unit:a. Turn the VOLUME (VR501) counterclockwisefully. (Fig. 2)b. Match the slit in the knob VOL unit with the“V

40、OLUME MIN” position and install it in thatstate. (Fig. 2)*At this time, do not tighten the lock set screw.c. Keep about 0.5 mm to 0.75 mm clearance fromthe front panel to knob VOL unit. (Fig. 2)d. Match the lock set screw position with the cut inVOLUME (VR501) and tighten the lock set screw.e. After

41、 installation, perform following checks.Turn the knob VOL unit both directions tocheck that it does not rub against the frontpanel.Turn the knob VOL unit clockwise fully andcheck that the slit in it matches with the“VOLUME MAX” position.Turn the knob VOL unit counterclockwisefully and check that the

42、 slit in it matches withthe “VOLUME MIN” position.G When installing the knob SEL unit:a. Turn the INPUT (SW501) so that the cut in itcomes at the top. (Fig. 2)b. Install the knob SEL unit with its lock set screwpositioned at the top. (Fig. 2)*At this time, do not tighten the lock set screw.c. Keep a

43、bout 0.5 mm to 0.75 mm clearance fromthe front panel to knob SEL unit. (Fig. 2)d. Match the lock set screw position with the cut inINPUT (SW501) and tighten the lock set screw.e. After installation, perform following checks.Turn the knob SEL unit in both directions tocheck that it does not rub again

44、st the frontpanel.G When installing the knob TC unit*Use the same installation procedure for BASS,TREBLE and BALANCE.Described here is installation of BALANCE asan example.a. Turn the BALANCE (VR504) in both directionsand set it to the center position. (Fig. 2)*VR504 stops at the center position whe

45、n it isturned in both directions.b. Match the slit in the knob TC unit with the centerposition of BALANCE 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 fromthe front panel to knob TC unit. (Fig. 2)d. Tighten the lock s

46、et screw of the knob TC unit.(Fig. 2)Knob VOL unitVOLSlitCut位置Lock set screw止Lock set screw止Lock set screw止Center position of BALANCEBALANCE中央VR501SW501VR504VOLUME MINVOLUME MAXKnob SEL unitSELKnob TC unitTCFront panel0.50.75mmFig. 2e. 取付後、次動作確認。 TC左右回、擦? TC左回、TC “BALANCE L” 位置合? TC右回、TC “BALANCE R”

47、 位置合?e. After installation, perform following checks.Turn the knob TC unit in both directions tocheck that it does not rub against the frontpanel.Turn the knob TC unit counterclockwisefully and check that the slit in it matches withthe “BALANCE L” position.Turn the knob TC unit clockwise fully andch

48、eck that the slit in it matches with the“BALANCE R” position.11A-S2000A-S2000Fig. 34. ASSY外方a. 74本外、取外。（Fig. 3）b. 88本外。 （Fig. 3）c. CB501、CB504、CB517、CB519、CB521、SW1-2外。 （Fig. 3）d. ASSY取外。 （Fig. 3）4. Removal of Front Frame Assya. Remove 4 screws (7) to remove the frame top. (Fig. 3)b. Remove 8 screws

49、 (8). (Fig. 3)c. Remove CB501, CB504, CB517, CB519, CB521 andSW1-2. (Fig. 3)d. Remove the front frame assy. (Fig. 3)78887Frame topFront frame assy ASSYFront frame assy ASSYCB504CB517CB519CB521SW1SW2CB50112A-S2000A-S2000P.C.B.場合： 本機上布敷、上P.C.B.裏返置。 （Fig. 4） 外 （） 接続。 本機ASSY接続。ASSY取外場合、線等接続。 （Fig. 4）Whe

50、n checking the P.C.B.:Put the rubber sheet and cloth over this unit. Thenplace the P.C.B.s upside down on the cloth andcheck it. (Fig. 4)Reconnect all cables (connectors) that have beendisconnected.In this unit, the ground of the front frame assy is con-nected to the chassis. When the front frame as