Yamaha-MSR250-spk-sm 维修电路原理图.pdf

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1、SERVICE MANUALSPECIFICATIONS （総合仕様） .3PERFORMANC GRAPH （特性図） .4PANEL LAYOUT （） .4CIRCUIT BOARD LAYOUT （）.5DIMENSIONS （寸法図）.5DISASSEMBLY PROCEDURES （分解手順）.6IC BLOCK DIAGRAM （IC図） .15CIRCUIT BOARDS （基板図） .15INSPECTIONS （検査） .23PARTS LISTBLOCK & LEVEL DIAGRAM （&）CIRCUIT DIAGRAM （回路図）I CONTENTS （目次）PA01

2、1901200805-72450Copyright (c) Yamaha Corporation. All rights reserved. 08.06HAMAMATSU, JAPANMSR250RadioFans.CN 收音机爱 好者资料库MSR2502IWARNINGComponents having special characteristics are marked and must be replaced with parts having specification equal to those originallyinstalled. 印部品、安全維持重要部品。交換場合、安全必指

3、定部品使用。IMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic serviceprocedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and havetherefo

4、re not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruc-tion of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamahaproduct owners that all

5、service required should be performed by an authorized Yamaha Retailer or the appointed servicerepresentative.IMPORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization, certification, recognition ofany applicable technical capabilities, or establis

6、h a principal-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 servicedepartments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and

7、 changes in specifica-tion are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors ServiceDivision.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulat

8、ed bygrounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus).IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordWARNING:THI

9、S APPARATUS MUST BE EARTHEDIMPORTANT.The wires in this mains lead are coloured in accordance with the following code:GREEN-AND-YELLOW:EARTHBLUE:NEUTRALBROWN:LIVEAs the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in

10、yourplug, proceed as follows:The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safetyearth symbol or colored GREEN or colored GREEN and YELLOW.The wire which is coloured BLUE must be connected to the terminal which is

11、marked with the letter N or coloured BLACK.The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.WARNING: This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive harm.DO NO

12、T PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/fluxvapor!If you come in contact with solder or components locat

13、ed inside the enclosure of this product, wash your hands before handling food.RadioFans.CN 收音机爱 好者资料库MSR2503I SPECIFICATIONS 総合仕様G General SpecificationsType. 2-way Bass Reflex Powered SpeakerSpeaker UnitLF:.10 (25 cm) ConeHF: . 1 (2.54 cm) Compression DriverFrequency Range. 55 Hz20 kHz (-10 dB)Maxi

14、mum Output Level . 116 dB (1 m on Axis)Directional Angle. 90 (H)/40 (V)Dimension (W x H x D) . 342 x 544.5 x 298 mmWeight . 14.1 kgColor. BlackTripod Pole Diameter . 3536 mmIncluded Accessories.Power cord (AC inlet type, 2.5 m)Owners ManualG Amp. UnitMaximum Output Power.200 W at 1 kHz, THD=1 %, RL=

15、4 Crossover Frequency. 4.0 kHz (LF: 12 dB/oct, HF: 12 dB/oct.)Input SensitivityINPUT 1(XLR): . -60 dBu* (MIC), -30 dBu* (LINE)(Phone): . -50 dBu* (MIC), -20 dBu* (LINE)INPUT 2/3(Phone/RCA-pin): . -20 dBu*Input ImpedanceINPUT 1:. 2 k (XLR), 6 k (Phone)INPUT 2/3:. 10 kOutput Impedance .LINK OUT: 600 C

16、ontrolsLEVEL Control:. INPUT 1, 2/3CH EQLOW:.3 dB at 60 HzHIGH:. 6 dB at 10 kHzPOWER Switch (ON/OFF)Input/Output ConnectorsINPUT 1:. XLR-3-31 / PHONE (balanced)INPUT 2/3:. PHONE / RCA-pin (unbalanced)IndicatorsPOWER Indicator: .Green LEDLIMITER Indicator: . Red LEDPower Consumption .40 W* 0 dBu=0.77

17、5 V一 般仕様形式. 2型LF： .10 （25 cm） HF： . 1 （2.54 cm） 再生周波数帯域.55 Hz20 kHz （-10 dB）最大出力音圧 . 116 dB （軸上1 m）指向角度. 90（H） 40（V）最大外形寸法 （W x H x D） . 342 x 544.5 x 298 mm質量. 14.1 kg色. 黒三脚径. 3536 mm付属品.電源 （AC型、2.5 m）取扱説明書定格最大出力.200 W at 1 kHz、THD1 、RL4 周波数. 4.0 kHz （LF：12 dBoct、HF：12 dBoct.）入力感度INPUT 1（XLR） ： .-6

18、0 dBu* （MIC） 、-30 dBu* （LINE）（Phone） ： .-50 dBu* （MIC） 、-20 dBu* （LINE）INPUT 23（PhoneRCA-pin） ： .-20 dBu*入力INPUT 1： . 2 k （XLR） 、6 k （Phone）INPUT 23： .10 k出力 . LINK OUT：600 LEVEL：. INPUT 1、23CH EQLOW： .3 dB at 60 HzHIGH： . 6 dB at 10 kHzPOWER （ONOFF）入出力端子INPUT 1： . XLR-3-31PHONE （balanced）INPUT 23：

19、. PHONERCA-pin （unbalanced）POWER： .緑色発光LEDLIMITER：.赤色発光LED消費電力. 40 W* 0 dBu0.775 VMSR250412345678901234567890I PANEL LAYOUT （）5671348902I PERFORMANCE GRAPH （特性図）Frequency ResponseFrequencyResponseINPUT 1 jacksMIC/LINE switchINPUT 2/3 jacksLINK OUT jackEQ controlsLEVEL controlsLIMITER indicatorPOWER

20、indicatorPOWER switchAC IN connector INPUT 1端子 MICLINE INPUT 23端子 LINK OUT端子 EQ LEVEL LIMITER POWER POWER AC IN端子MSR2505I CIRCUIT BOARD LAYOUT （）I DIMENSIONS （寸法図）342544.5298Tripod pole diameter 35-36三脚径 三脚使方 取扱説明書参照。*Use of the stand should refer to standmanufacturers instructions.1201522-M8 x 25Un

21、it: mm単位：mmFront viewRight side viewRear viewCONTROLPOWER-aPOWER-bCONTROLMOTHERMOTHERINPUTSpeaker HF （HF） NETWORKNETWORKSpeaker LF （LF） AMPAMPPOWER-bMSR2506Speaker LF （LF） Front grille assembly（Assy） 1008080808010010010080Front cabinet unit（ 部） Rear cabinet unit（部） 50505050Fig. 1（図1）Fig. 2（図2）（束線HF

22、（黄） ） （HF （） ） （束線HF （青） ） Speaker HF (Tweeter)Wire HF (Yellow)Wire HF (Blue)80:BIND HEAD TAPPING SCREW-P 5x18 BLACK CR3 (WJ559700)P BIND100: BIND HEAD TAPPING SCREW-P 4x12 NI-BL (WJ329500)P BIND50:BIND HEAD TAPPING SCREW-A 5x45 NI-BL(WJ329900) A BIND（束線LF （黒） ） （LF （） ） （束線LF （赤） ） Speaker LF (Woof

23、er)Wire LF (Black)Wire LF (Red)Photo. 1（写真 1）Photo. 2（写真 2）I DISASSEMBLY PROCEDURES （分解手順）1.Front Grille Assembly(Time required: About 1 minute)1-1Remove the four (4) screws marked 100. The frontgrille assembly can then be removed. (Fig. 1)2.Speaker LF (Woofer)(Time required: About 3 minutes)2-1Remo

24、ve the front grille assembly. (See procedure 1.)2-2Remove the eight (8) screws marked 80. The speakerLF (Woofer) can then be removed. (Fig. 1)2-3Disconnect the connector assembly LF (red/black) con-nected to the speaker LF (Woofer). (Photo. 1)*Take care not to drop the speaker LF (woofer) be-cause i

25、ts heavy.3.Front Cabinet Unit and Rear Cabinet Unit(Time required: About 3 minutes)3-1Remove the fourteen (14) screws marked 50. The frontcabinet unit and the rear cabinet unit can then be sepa-rated. (Fig. 2)3-2Disconnect the connector assembly LF (red/black) con-nected to the speaker LF (Woofer) a

26、nd the connectorassembly HF (yellow/blue) connected to the speakerHF (Tweeter). (Photo. 1, 2)1.Ass y（所要時間：約1分）1-1100 4本外、Ass y外。 （図1）2.LF （）（所要時間：約3分）2-1Ass y外。 （1項参照）2-280 8本外、LF （） 外。 （図1）2-3LF （） 取付束線LF（赤黒） 外。 （写真1）LF （） 重量落下注意。3.部、部（所要時間：約3分）3-150 14本外、部部別。 （図2）3-2LF （） 取付束線LF（赤黒） 、HF （） 取付束線HF

27、（黄青） 外。 （写真1、2）MSR2507Network holder D（固定金具D） NETWORK13x2x215dNetwork holder C（固定金具C） 15dCN813NETWORK assembly（Assy） Fig. 3（図 3）Fig. 4（図 4）4.Speaker HF (Tweeter)(Time required: About 4 minutes)4-1Separate the front cabinet unit and the rear cabinet unit.(See procedure 3.)4-2Remove the two (2) screws

28、 marked 46. The speakerHF (Tweeter) can then be removed from the front cabi-net unit. (Fig. 3)5.NETWORK Circuit Board(Time required: About 4 minutes)5-1Separate the front cabinet unit and the rear cabinet unit.(See procedure 3.)5-2Disconnect the connector assembly connected to theconnector CN8 (2P)

29、of the NETWORK circuit board.5-3Remove the four (4) screws marked 13. The NET-WORK assembly can then be removed from the rearcabinet unit. (Fig. 4)5-4Remove the four (4) screws marked 15d. The NET-WORK circuit board and the network holders C and Dcan then be separated. (Fig. 4)5.NETWORK（所要時間：約4分）5-1

30、部部別。 （3項参照）5-2NETWORKCN8 （2P） 接続Ass y外。5-313 4本外、部Ass y外。 （図4）5-415d 4本外、NETWORK固定金具C、D別。 （図4）4.HF （）（所要時間：約4分）4-1部部別。 （3項参照）4-246 2本外、部HF （） 外。 （図3）13:BIND HEAD TAPPING SCREW-B 3.0 x10 NI-BL (AAX61710)B BIND15d: PAN HEAD TAPPING SCREW-B 3.0 x8 CR3 WITH FLANGE(AAX61700) B PANSpeaker HF (Tweeter)（HF

31、（） ） 4646:BIND HEAD TAPPING SCREW-B 4.0 x20 NI-BL (AAX61630)B BIND Rear Cabinet Unit（部）MSR2508200A200ACN546CN541CN54211011100MOTHERAMP171 Positive thermistor（） 172 Tube UL black x 2（黒） Fig. 5（図5）6.Amplifier Assembly(Time required: About 2 minute)6-1Remove the ten (10) screws marked 30. The amplifier

32、assembly can then be removed. (Fig. 5)6-2Disconnect the connector assembly connected to theconnector CN546 (2P) of the MOTHER circuit board.(Fig. 6)7.MOTHER Circuit Board(Time required: About 4 minutes)7-1Remove the amplifier assembly. (See procedure 6.)7-2Disconnect the connector assemblies connect

33、ed to theconnectors CN541 (5P) and CN542 (5P) of the MOTHERcircuit board. (Fig. 6)7-3Remove the three (3) screws marked 200A. (Fig. 6)7-4Remove the MOTHER circuit board from the connec-tors 1100 (11P) and 1101 (10P) of the AMP circuit board.(Fig. 6)*The positive thermistor marked 171 and two(2) blac

34、k tubes marked 172 are not parts of theMOTHER circuit board. When replacing theMOTHER circuit board, be sure to remove theseparts and attach them to the new MOTHER cir-cuit board.6.Ass y（所要時間：約2分）6-130 10本外、Ass y外。 （図5）6-2MOTHERCN546 （2P） 接続Ass y外。 （図6）.MOTHER（所要時間：約4分）7-1Ass y外。 （6項参照）7-2MOTHERCN54

35、1 （5P） 、CN542 （5P）接続Ass y外。 （図6）7-3200A 3本外。 （図6）7-4AMP1100 （11P） 、1101 （10P） MOTHER外。 （図6）171 172 黒2個、MOTHER構成部品。MOTHER交換際必取外、新MOTHER取付。30:BIND HEAD TAPPING SCREW-P 4x12 NI-BL(WJ329500) P BINDFig. 6（図 6）200A: BIND HEAD TAPPING SCREW-B 3.0 x8 CR3 (AAX61980)B BINDAmplifier assembly（Assy） 30303030MSR2

36、509Fig. 7（図 7）8.INPUT circuit board(Time required: About 6 minutes)8-1Remove the amplifier assembly. (See procedure 6.)8-2Remove the MOTHER circuit board. (See procedure 7.)8-3Remove the three (3) screws marked 130, four (4)hexagonal nuts and four (4) washers. (Fig. 7)8-4Remove the INPUT circuit boa

37、rd from the connectorCN26 (6P) of the CONTROL circuit board. (Fig. 7)*The push button marked 150 and push spacermarked 155 are not parts of the INPUT circuitboard. When replacing the INPUT circuit board,be sure to remove these parts and attach themto the new INPUT circuit board.INPUT（所要時間：約6分）8-1Ass

38、 y外。 （6項参照）8-2MOTHER外。 （7項参照）8-3130 3本、六角4個、4個外。 （図7）8-4CONTROLCN26 （6P） INPUT外。 （図7）150 155 、INPUT構成部品。INPUT交換際必取外、新INPUT取付。CN26150 Push button（ ） 155 Push spacer（ ） INPUTCONTROLINPUT130Hexagonal nut（六角 ） Hexagonal nut（六角 ） Washer（ ） Washer（ ） 130: BIND HEAD TAPPING SCREW-B 3.0 x10 NI-BL (AAX61710)

39、 B BINDMSR25010Fig. 8（図 8）9.CONTROL circuit board(Time required: About 8 minutes)9-1Remove the amplifier assembly. (See procedure 6.)9-2Remove the MOTHER circuit board. (See procedure 7.)9-3Remove the INPUT circuit board. (See procedure 8.)9-4Disconnect the connector assembly connected to theconnect

40、or CN802 (3P) of the POWER-b circuit board.(Fig. 8)9-5Remove the four (4) screws marked 80A. The CON-TROL circuit board can then be removed. (Fig. 8)*The six (6) volume knobs marked 160 are notparts of the CONTROL circuit board. When re-placing the CONTROL circuit board, be sure toremove these parts

41、 and attach them to the newCONTROL circuit board.9.CONTROL（所要時間：約8分）9-1Ass y外。 （6項参照）9-2MOTHER外。 （7項参照）9-3INPUT外。 （8項参照）9-4POWER-bCN802 （3P） 接続Ass y外。 （図8）9-580A 4本外、CONTROL外。 （図8）160 6個CONTROL構成部品。CONTROL交換際必取外、新CONTROL取付。80A: BIND HEAD SCREW 3.0 x8 CR3 (AAX61910) 小BIND80A80ACONTROLPOWER-bCN802Volu

42、me knob x 6（） 160MSR25011CN541MOTHER80BPOWER-bCN802CN803CN80180BFig. 9（図 9）10.AMP Circuit Board(Time required: About 7 minutes)10-1Remove the amplifier assembly. (See procedure 6.)10-2Remove the MOTHER circuit board. (See procedure 7.)10-3Remove the INPUT circuit board. (See procedure 8.)10-4Remove

43、the two (2) screws marked 200B. The AMPcircuit board can then be removed. (Fig. 9)11.POWER-b Circuit Board(Time required: About 4 minutes)11-1Remove the amplifier assembly. (See procedure 6.)11-2Disconnect the connector assemblies connected to theconnectors CN801 (5P), CN802 (3P) and CN803 (2P)of th

44、e POWER-b circuit board and the connector as-sembly connected to the connector CN541 (5P) of theMOTHER circuit board.11-3Remove the four (4) screws marked 80B. The POWER-b circuit board can then be removed. (Fig. 10)10.AMP（所要時間：約7分）10-1Ass y外。 （6項参照）10-2MOTHER外。 （7項参照）10-3INPUT外。 （8項参照）10-4200B 2本外、

45、AMP外。 （図9）11.POWER-b（所要時間：約4分）11-1Ass y外。 （6項参照）11-2POWER-bCN801 （5P） 、CN802（3P） 、CN803 （2P） 接続Ass y、MOTHERCN541 （5P） 接続Ass y外。11-380B 4本外、POWER-b外。（図10）200B: BIND HEAD TAPPING SCREW-B 3.0 x8 CR3 (AAX61980)B BINDFig. 10（図10）80B: BIND HEAD SCREW 3.0 x8 CR3 (AAX61910) 小 BIND200BAMPMSR2501212.FAN (Time

46、 required: About 3 minutes)12-1Remove the amplifier assembly. (See procedure 6.)12-2Disconnect the connector assembly connected to theconnector CN802 (2P) of the POWER-b circuit board.(Fig. 11)12-3Remove the four (4) screws marked 230. The FANcan then be removed. (Fig. 11)12. （所要時間：約3分）12-1Ass y外。 （

47、6項参照）12-2POWER-bCN803 （2P） 接続Ass y。 （図11）12-3230 4本外、外。 （図11）Fig. 11（図11）230: PAN HEAD TAPPING SCREW-B 3x12 CR3 (WP927900) B PANCN803FAN230POWER-bMSR2501313.Power Transformer and POWER-a Circuit Board(Time required: About 5 minutes)13-1Remove the amplifier assembly. (See procedure 6.)13-2Disconnect

48、the connector assemblies connected to theconnectors CN810 (2P), CN812 (2P) of the POWER-acircuit board and the connector CN801 (5P) of thePOWER-b circuit board. (Fig. 12)13-3Remove the four (4) screws marked 25. The powertransformer can then be removed together with thePOWER-a circuit board. (Fig. 1

49、2)13-4Unsolder the leads of the power transformer. ThePOWER-a circuit board and power transformer can thenbe separated.*The three (3) fuses marked 31, 32 and 33 arenot parts of the POWER-a circuit board. Whenreplacing the POWER-a circuit board, be sure toremove these parts and attach them to the new

50、POWER-a circuit board.13.電源、POWER-a（所要時間：約5分）13-1Ass y外。 （6項参照）13-2POWER-aCN810 （2P） 、CN812（2P） 、POWER-bCN801 （5P） 接続Ass y外。 （図12）13-325 4本外、電源POWER-a共外。 （図12）13-4電源付部分取除、POWER-a電源別。31 、 32 、 33 POWER-a構成部品。POWER-a交換際必取外、新POWER-a取付。Fig. 12（図12）25:BIND HEAD TAPPING SCREW-B 4x8 NI-BL (WP183100) B BIND