Yamaha-MXD1-pwr-sm 维修电路原理图.pdf

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1、100869P.O.Box 1, Hamamatsu, JapanI CONTENTSTO SERVICE PERSONNEL . 23FRONT PANEL . 4REAR PANELS . 45SPECIFICATIONS. 6INTERNAL VIEW . 7SERVICE PRECAUTIONS / 時注意事項.810DISASSEMBLY PROCEDURES / 分解手順. 1114TROUBLE SHOOTING / 故障方法 .1516PROTECTION INFORMATION /情報 .1718IC DATA . 1921BLOCK DIAGRAM. 2223PRINTED

2、 CIRCUIT BOARD . 2433PIN CONNECTION DIAGRAM . 34SCHEMATIC DIAGRAM . 3537PARTS LIST. 3954SERVICE MANUALDIGITAL POWER AMPLIFIERMX-D1MX-D1IMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedure

3、s inherent to the industry, and more specifically YAMAHA Products, 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

4、 components, and failure of the product to perform as specified. 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 indivi

5、dual or firm does not constitute authorization, certification orrecognition 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,

6、andservice departments of YAMAHA are continually striving to improve 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.WAR

7、NING:Static discharges can destroy expensive components. Discharge 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

8、 work before you apply power to the unit.RadioFans.CN 收音机爱 好者资料库2MX-D1MX-D1WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEI TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked s andmust be replaced with parts having spe

9、cifications equal to thoseoriginally installed.2. Leakage Current Measurement (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 ohm shuntedby 0

10、.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (whereapplicable) components may also

11、 contain traces of chemicals found by the California Health and Welfare Agency (andpossibly 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 WHATSOEVER!Avoid prolonged, unpro

12、tected 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 solder or components located inside the enclosure of this product, wash your hands beforehandling food.“CAUTION”“F501: FOR CONTINUED PROTECTION AGAIN

13、ST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 20A,250V FUSE.”CAUTIONF501: REPLACE WITH SAME TYPE 20A, 250V FUSE.ATTENTIONF501: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 20A, 250V.RadioFans.CN 收音机爱 好者资料库3MX-D1MX-D1製品使用基板面付、Sn+Ag+Cu （錫+銀+銅） 合金無鉛使用。、MAIN P.C.B.部品面OPERATION P.C.B.部品面表面実装部品付、鉛入使用。無鉛

14、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。 鉛入使得場合、交換部品端子部周辺部無鉛取除、無鉛鉛入十分溶状態付。The foil side of all P.C.B.s used for this product are solderedwith lead-free soldering material which is an alloy ofSn+Ag+Cu (tin + silver + copper).However, the surface mount devi

15、ces on the component sideof the MAIN P.C.B. and OPERATION P.C.B. are solderedwith the lead solder.Among some types of lead-free solder currently available,it 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

16、(tin + zinc + bismuth)Caution:1. As the melting point temperature of the lead-free solderis about 30C to 40C (50F to 70F) higher than that ofthe lead solder, be sure to use a soldering iron suitableto each solder.2. If lead solder must be used, be sure to remove lead-free solder from each terminal s

17、ection of the parts to bereplaced and from the area around it completely beforesoldering, or make sure that the lead-free solder andlead solder melt together fully.About lead-free solder / 無鉛75 (2-15/16)60(2-3/8)401 (15-13/16)15 (9/16)2 (1/16)34(1-5/16)437 (17-3/16)435 (17-1/8)Unit : mm (inch)単位: mm

18、（）DIMENSIONS / 寸法図4MX-D1MX-D1CoverI REAR PANELSU, C modelsA modelI FRONT PANEL5MX-D1MX-D1B, G modelsT modelK modelJ model6MX-D1MX-D1Minimum RMS Output Power / 定格出力(1 kHz, 1% THD)U, C models (8 ohms) . 500 W + 500 WA, B, G, T, K, J models (4 ohms to 8 ohms) .500 W + 500 WDynamic Power Per Channel / (

19、IHF)8/6/4/2 ohms .700/850/1000/1000 WDynamic Headroom / 8/6/4 ohms.1.5/2.3/3.0 dBDamping Factor / 1 kHz, 8 ohms . more than 200Input Sensitivity / Input Impedance (入力感度/入力)UNBALANCE .1.3 V / 25 k-ohmsBALANCE.2.2 V / 10 k-ohmsFrequency Response / 周波数特性1 Hz to 100 kHz. 3.0 dB10 Hz to 20 kHz. 0.5 dBTot

20、al Harmonic Distortion / 全高調波歪率(1 kHz, 10 W/ 8 ohms, 20 kHz LPF)UNBALANCE . less than 0.002 %BALANCE. less than 0.002 %Signal to Noise Ratio / 信号対雑音比 (IHF-A network)(Input shorted, 20 kHz LPF)UNBALANCE . more than 120 dBBALANCE. more than 120 dBChannel Separation / (Input 5.1 k-ohms shorted, 1 kHz)U

21、NBALANCE . more than 100 dBBALANCE. more than 100 dBMuting / .- I SPECIFICATIONS / 参考仕様Power Supply / 電源電圧U, C models . AC 120 V, 60 HzA model . AC 240 V, 50 HzB, G models . AC 230 V, 50 HzT model . AC 220 V, 50 HzK model . AC 220 V, 60 HzJ model. AC 100V, 50/60 HzPower Consumption / 消費電力U, C models

22、 . 350 WA, B, G, T, K models . 350 WJ model. 350 WStandby Power Consumption (Reference Data) / 待機時消費電力(参考値). less than 0.1 WDimensions / 寸法 (W x H x D). 435 x 75 x 437 mm (17-1/8 x 2-15/16 x 17-3/16)Weight / 重量. 10.4 kg (22 lbs. 15 oz.)Accessories / 付属品Power Cable x 1Clamp Filter with Fixing Tie (fo

23、r Power Cable) x 2Clamp Filter (for RS-232C Interface Cable) x 1Clamp Filter (for Control Cable) x 2 U, C modelsClamp Filter (for Audio Pin Cable) x 1 U, C models*Specifications are subject to change without notice dueto product improvements. 参考仕様外観予告変更。U . U.S.A. modelC . Canadian modelA . Australi

24、an modelB. British modelG. European modelT . Chinese modelK . Korean modelJ . Japanese model7MX-D1MX-D1I INTERNAL VIEW123 4567A0981 FUNCTION (1) P.C.B.2 FUNCTION (4) P.C.B.3 FUNCTION (3) P.C.B.4 FUNCTION (6) P.C.B.5 FUNCTION (2) P.C.B.6 FUNCTION (7) P.C.B.7 FUNCTION (5) P.C.B.8 MAIN (R) P.C.B.9 OPER

25、ATION (1) P.C.B.0 OPERATION (2) P.C.B.A MAIN (L) P.C.B.8MX-D1MX-D1I SERVICE PRECAUTIONS / 時注意事項1. 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。 C196、C197、C198、C199、C222、C223電源OFF後電荷残、高電圧維持危険。修理作業前放電用抵抗 （5k/10W） 下記端子間接続放電。放電所用時間約30秒間。（Lch、Rch各4箇所。）1. Safety measuresSome internal parts in this product contain hi

26、gh voltagesand are dangerous. Be sure to take safety measuresduring servicing, such as wearing insulating gloves.Note that C196, C197, C198, C199, C222 and C223are dangerous even after the power is turned off becausean electric charge remains and a high voltage continuesto exist there.Before startin

27、g the service work, connect dischargingresistors (5 k-ohms/10 W) to the terminals indicated inthe figure below to discharge electricity. The timerequired for discharging is about 30 seconds. (at 4locations for Lch and Rch, each)C217R272TP304TP302TP301TP303IC129C223C222C199C197C198C196C191D134D135D13

28、7D139D138D136C190T1015 k-ohms10W5 k-ohms10W5 k-ohms10W5 k-ohms10WMAIN P.C.B.9MX-D1MX-D12. Precautions for connection of measuringinstrumentThe structure of this product is twin-monaural type. Connectthe measuring instrument to the Lch side GND when takingmeasurements on the Lch side and to the Rch s

29、ide GNDwhen taking measurements on the Rch side.Note: The GND is commonly used for Lch and Rch at thescrew terminal of the FUNCTION P.C.B. (3).2. 計測器接続時注意製品構成。計測器接続際、Lch側測定場合Lch側GND接続、Rch側測定場合Rch側GND接続。注： LchGNDRchGND、FUNCTION P.C.B. (3)端子部共通。5 k-ohms5 k-ohms10W10W5 k-ohms5 k-ohms10W10W5 k-ohms5 k-o

30、hms10W10W5 k-ohms10W5 k-ohms10W5 k-ohms10W5 k-ohms10W10MX-D1MX-D1Q117Q118Q119FET Mounting ScrewFET取付Heatsink/AMP/AMPQ120Heatsink/AMP Mounting Screw/AMP取付Heatsink/AMP/AMPFrame3. FET絶縁確認MAIN P.C.B.FET （Q117Q120） 取外場合、組立後必使用FET本体金属部分FET取付間絶縁確認。4. /AMP間絶縁確認/AMP取付外場合、組立後必使用/AMP間絶縁確認。3. Confirming insulat

31、ion of FETWhen the FETs (Q117 to Q120) of the MAIN P.C.B. wereremoved, be sure to check using the tester that the metalpart of each FET itself is insulated from the FET mountingscrew after reinstalling them.4. Confirming insulation between Heatsink/AMPand chassisWhen the Heatsink/AMP mounting screws

32、 were removed,be sure to check using the tester that the Heatsink/AMP isinsulated from the Frame after reinstalling them.11MX-D1MX-D1Front PanelTop Panel44Side PanelSide PanelBottom CoverCloth布111123I DISASSEMBLY PROCEDURES / 分解手順（番号順部品取外。）AC電源、電源抜。1. 外方a. 柔布敷、上本機反転置。b.111本外、取外。（Fig. 1）2. 、外方a.24本、3

33、3本外。 （Fig. 1）b. 本機上向、44本外。 （Fig. 2）c. 、一体方向取外。 （Fig. 2）(Remove parts in the order as numbered.)Disconnect the power cable from the AC outlet.1. Removal of Bottom Covera. Spread a soft cloth and place the unit upside down on it.b. Remove 11 screws (1) and then remove the BottomCover. (Fig. 1)2. Remov

34、al of Front Panel, Side Panels and TopPanelsa. Remove 4 screws (2) and 3 screws (3). (Fig. 1)b. Set the main unit with its top facing up and remove 4screws (4). (Fig. 2)c. Remove the Front Panel, Side Panel and Top Paneltogether by sliding them toward the front. (Fig. 2)Fig. 1Fig. 23. Discharging Ca

35、pacitorRefer to “SERVICE PRECAUTIONS” on page 8.3. 放電8 “時注意事項” 参照12MX-D1MX-D1CB505CB101CB102CB105CB103CB104FUNCTION (1) P.C.B.MAIN (R) P.C.B.CB106CB107CB108CB50455678CB101CB102CB105CB103CB104MAIN (L) P.C.B.CB106CB107CB10899A00Fig. 3Fig. 44. Removal of MAIN (R) P.C.B.a. Remove 5 screws (5) and 5 scre

36、ws (6). (Fig. 3)b. Remove the connectors (CB101 to CB108) on the MAIN(R) P.C.B. (Fig. 3)c. Remove the MAIN (R) P.C.B. upward.5. Removal of FUNCTION (1) P.C.B.a. Remove 4 screws (7) and 5 screws (8). (Fig. 3)b. Remove the connectors (CB504, CB505) on theFUNCTION (1) P.C.B. (Fig. 3)c. Remove the FUNCT

37、ION (1) P.C.B. upward.6. Removal of MAIN (L) P.C.B.a. Remove 5 screws (9), 6 screws (0) and 2 screws (A).(Fig. 4)b. Remove the connectors (CB101 to CB108) on the MAIN(L) P.C.B. (Fig. 4)c. Release the angle catching the MAIN (L) P.C.B. andremove it upward.4. MAIN （R） P.C.B.外方a.55本、65本外。 （Fig. 3）b. MA

38、IN （R） P.C.B.上 （CB101CB108） 外。 （Fig. 3）c. MAIN （R） P.C.B.上方取外。5. FUNCTION （1） P.C.B.外方a.74本、85本外。 （Fig. 3）b. FUNCTION （1） P.C.B.上 （CB504、CB505）取外。 （Fig. 3）c. FUNCTION （1） P.C.B.上方取外。6. MAIN （L） P.C.B.外方a.95本、06本、A2本外。（Fig. 4）b. MAIN （L） P.C.B.上 （CB101CB108） 外。 （Fig. 4）c. MAIN （L） P.C.B.引、上方取外。13MX-D

39、1MX-D1Rubber Sheet and Cloth布Non-conductive Support枕木FUNCTION (5) P.C.B.FUNCTION (4) P.C.B.BC7. FUNCTION （5） P.C.B.外方a.B4本外。 （Fig. 5）b. FUNCTION （5） P.C.B.上方取外。8. FUNCTION （4） P.C.B.外方a.C4本外。 （Fig. 5）b. FUNCTION （4） P.C.B.上方取外。7. Removal of FUNCTION (5) P.C.B.a. Remove 4 screws (B). (Fig. 5)b. Remov

40、e the FUNCTION (5) P.C.B. upward.8. Removal of FUNCTION (4) P.C.B.a. Remove 4 screws (C). (Fig. 5)b. Remove the FUNCTION (4) P.C.B. upward.P.C.B.場合 本機上布敷、上P.C.B.立。 （Fig. 6） MAIN （L） P.C.B.、枕木使立。 （Fig. 6） 外 （） 接続。 FUNCTION (2) P.C.B.FUNCTION (3) P.C.B.取外浮動作、FUNCTION (2) P.C.B.FUNCTION (3)P.C.B.線等接続。W

41、hen checking the P.C.B.:Put the Rubber Sheet and a Cloth over the equipment.Then place the P.C.B. upright on the Cloth and checkit. (Fig. 6)Set the MAIN (L) P.C.B. upright using a non-conductive support, such as wood. (Fig. 6)Reconnect all cables (connectors) that have beendisconnected.When the FUNC

42、TION (2) P.C.B. and FUNCTION (3)P.C.B. are removed from the chassis, they do notwork because their grounding are disconnected. Besure to connect the ground of FUNCTION (2) P.C.B.and FUNCTION (3) P.C.B. to the chassis respectivelywith a jumper wire or the like.Fig. 5Fig. 614MX-D1MX-D1Cloth布PliersNutF

43、UNCTION (3) P.C.B.FUNCTION (7) P.C.B.FUNCTION (6) P.C.B.FUNCTION (2) P.C.B.JHKGFFICB502CB501FUNCTION (3) P.C.B.MAIN (R) P.C.B.CB101OPERATION (1) P.C.B.MAIN (L) P.C.B.CB101CB702 CB701EEEEEEEDD9. FUNCTION （2） , （3） , （6） , （7） P.C.B.外方a. MAIN （R） MAIN （L） P.C.B.上 （CB101）外。 （Fig. 7）b. FUNCTION （3） P.C.

44、B.上 （CB501、CB502）外。 （Fig. 7）c. OPERATION （1） P.C.B.上 （CB701、CB702） 外。 （Fig. 7）d.D2本取外。 （Fig. 7）e.E11本外。 （Fig. 7）f. 方向。g. 入力端子 （UNBALANCE） F外。 （Fig. 9）注：外傷布覆上使回。 （Fig. 8）9. Removal of FUNCTION (2), (3), (6) and (7)P.C.B.sa. Remove the connector (CB101) on the MAIN (R) andMAIN (L) P.C.B.s. (Fig. 7)b.

45、Remove the connectors (CB501, CB502) on theFUNCTION (3) P.C.B. (Fig. 7)c. Remove the connectors (CB701, CB702) on theOPERATION (1) P.C.B. (Fig. 7)d. Remove 2 screws (D). (Fig. 7)e. Remove 11 screws (E). (Fig. 7)f. Remove the Rear Panel rearward.g. Remove the nut (F) of the pin jack (UNBALANCE).(Fig.

46、 9)Note: When removing the nut, cover it with cloth andturn it with pliers so as not to cause damage to it.(Fig. 8)Fig. 7Fig. 9h. Remove 1 screw (G). (Fig. 9)i. Remove the FUNCTION (3) P.C.B. upward.j. Remove 1 screw (H) and 2 Lock Screws (I). (Fig. 9)k. Remove the FUNCTION (2) P.C.B. upward.l. Remo

47、ve 2 screws (J). (Fig. 9)m.Remove the FUNCTION (6) P.C.B. upward.n. Remove 2 screws (K). (Fig. 9)o. Remove the FUNCTION (7) P.C.B. upward.h.G1本外。 （Fig. 9）i.FUNCTION （3） P.C.B.上方取外。j.H1本I2本外。 （Fig. 9）k. FUNCTION （2） P.C.B.上方取外。l.J2本外。 （Fig. 9）m.FUNCTION （6） P.C.B.上方取外。n.K2本外。 （Fig. 9）o. FUNCTION （7）

48、P.C.B.上方取外。Fig. 815MX-D1MX-D1With the power turned off, discharge C196 C199, C222 and C223Refer to SERVICE PRECAUTIONS on page 8.Note: Connect TP304 to the grounding side of the oscilloscope.The grounding side of the oscilloscope must be floated because TP304 is not ground level.Refer to SERVICE PRE

49、CAUTIONS on page 8.Short circuit betweenDrain and Source in FET (Q117 Q120)? Replace theshorted FETYESOutput power supplyis normal?No Power or Powershuts off immediatelyNONOPower on but nosound from SPYESOutput coil (L101)350 kHz pulse available?FET (Q117 Q120)are open?YESYESReplace theopen FETNONOF

50、ailure in Analogamplifier aroundinput sectionFailure in IC118, IC119 or IC107Is the Poweroscillation 88 kHz?(Pulse wave 0 - 15 V)Remove CB106Check between R221 and TP304 with the oscilloscopeCheck between R222 and TP304 with the oscilloscopeQ126, Q127 isshort circuit?Failure in eitherIC127, IC128, I