Yamaha-MW12-mix-sm 维修电路原理图.pdf

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1、SERVICE MANUALHAMAMATSU, JAPANCopyright (c) Yamaha Corporation. All rights reserved. PDF 06.02PA011815 CONTENTS（目目目目目次次次次次）SPECIFICATIONS（総合仕様） . 3/5DIMENSIONS（寸法図） . 7PANEL LAYOUT（）. 8CIRCUIT BOARD LAYOUT（） . 12RACK MOUNTING（） . 12WIRING（結線図） . 13DISASSEMBLY PROCEDURE（分解手順）. 14LSI PIN DESCRIPTION（L

2、SI 端子機能表） . 18IC BLOCK DIAGRAM （IC図） . 18CIRCUIT BOARDS（基板図）. 19INSPECTIONS（検査） . 27/38BLOCK DIAGRAM & LEVEL DIAGRAM （）OVERALL CIRCUIT DIAGRAM（総回路図）PARTS LIST20060225-RadioFans.CN 收音机爱 好者资料库2MW12WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addi

3、tion, other electrical/electronic and/or plastic (Whereapplicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possiblyother entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC

4、 OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER!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 pro

5、duct, wash your hands before handling food.IMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed thatbasic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and und

6、erstood by theusers, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in per-sonal injury, destruction of expensive components and failure of the product to perform as specified. Forthese reasons, we advis

7、e all Yamaha product owners that all service required should be performed by anauthorized Yamaha Retailer or the appointed service representative.IMPORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-cation, recognition of any applicab

8、le technical capabilities, or establish a principal-agent relationship ofany 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 improve Yamaha products. Modific

9、ations are, therefore, inevitableand changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static elect

10、ricity your body may haveaccumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect tothis bus.)IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.Components having special characteristics ar

11、e marked and must be replaced with parts having specification equal to thoseoriginally installed. This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (2 wires).WARNINGIMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordIMPORTANT:The wires in this mains lead ar

12、e coloured in accordance with the following code:BLUE : NEUTRALBROWN : LIVEAs the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in your plug proceed as follows:The wire which is coloured BLUE must be connected to the t

13、erminal which is 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.Making sure that neither core is connected to the earth terminal of the three pin plug.印商品、安全維持重要部品。交換場合、安全必指定部品使用。RadioFan

14、s.CN 收音机爱 好者资料库3MW12 SPECIFICATIONSTotal Harmonic Distortion(MIC to ST OUT)Frequency Response(CH INPUT 1-11/12 to ST OUT, GROUPOUT, AUX SEND, C-R OUT, REC OUT)Hum & NoiseRs=150 ohms, Gain=Maximum, Hum &Noise are measured with a -6 dB/octavefilter 12.7 kHz; equivalent to a 20 kHzfilter with infinite

15、dB/octave attenuation.Maximum Voltage Gain (1 kHz)PAN/BAL: panned hard left or hard right.Crosstalk (1 kHz) Conditions(THD+N) 20 Hz-20 kHz +14 dBu 600 ohms, GAIN controls atminimum level, all faders at nominal level20 Hz-20 kHz, nominal output level1kHz, 600 ohms (ST OUT), 10 kohms (GROUP OUT, AUX S

16、END, C-R OUT, REC OUT), GAINcontrols at minimum level (CH INPUT 1-7/8), all faders at nominallevelEquivalent Input Noise (CH INPUT 1-4 MIC)Residual Output Noise 600 ohms (ST OUT)ST, GROUP master faders at nominal level and all channel GROUPswitches and ST switches are off. (ST, GROUP OUT)AUX master

17、control at nominal level and all channel mix controls atminimum level. (AUX SEND)ST, GROUP master faders and one channel fader at nominal level. (ST,GROUP OUT)CH INPUT 1-4 MIC to CH INSERT OUT (10 k ohms), Rs=150 ohms,GAIN controls at maximum levelCH INPUT 1-7/8 MIC to ST OUT (600 ohms), GROUP OUT (

18、10 kohms), Rs=150 ohms, GAIN controls at maximum levelCH INPUT 1-7/8 MIC to ST OUT (600 ohms), GROUP to ST, Rs=150ohms, GAIN controls at maximum levelCH INPUT 1-7/8 MIC to REC OUT (10 k ohms), Rs=150 ohms, GAINcontrols at maximum levelCH INPUT 1-4 MIC to AUX SEND (10 k ohms), Rs=150 ohms, GAINcontro

19、ls at maximum level, PRECH INPUT 1-4 MIC to AUX SEND (10 k ohms), Rs=150 ohms, GAINcontrols at maximum level, POSTCH INPUT 5/6-7/8 LINE to ST OUT (600 ohms), GROUP OUT (10 kohms), Rs=150 ohms, GAIN controls at maximum levelCH INPUT 5/6-7/8 LINE to AUX SEND (10 k ohms), Rs=150 ohms,GAIN controls at m

20、aximum level, PRECH INPUT 5/6-7/8 LINE to AUX SEND (10 k ohms), Rs=150 ohms,GAIN controls at maximum level, POSTCH INPUT 9/10-11/12 to ST OUT (600 ohms), GROUP OUT (10 kohms), Rs=150 ohms, GAIN controls at maximum levelRETURN to ST OUT (600 ohms), Rs=150 ohmsRETURN to AUX SEND(10 k ohms), Rs=150 ohm

21、s2TR IN to ST OUT (600 ohms), Rs=600 ohmsAdjacent inputsinput to outputMIN3TYP060849462.276865847573416927.8MAX0.1112810088(92 dB S/N)81(85 dB S/N)64(68 dB S/N) -70-70UNIT%dBdBudBudBudBudBudBdBdBdBdBdBdBdBdBdBdBdBdBdBdB Electrical CharacteristicsWhere 0 dBu=0.775VmsOutput Impedancce of signal genera

22、tor: 150 ohmsMonaural/Stereo CH High Pass FilterMonaural/Stereo CH EqualizationTurn over/roll-off frequency of shelving, 3 dB below maximumvariable levelPhantom PowerMonaural/Stereo Input PEAK IndicatorUSB AudioIncluded AccessoriesPower ConsumptionDimensions (W X H X D)Net WeightTemperature Range80

23、Hz 12 dB/octave15 dB (Max. Variation)HIGH: 10 kHz (shelving)MID: 2.5 kHz (peaking)LOW: 100 Hz (shelving)Supplied when Phantom +48 V switch is ON. (XLR-type input jacks)On each channel: red indicator lights if post-EQ signal (on ST channels, if either post-EQ signal orpost-mic-amp signal) comes withi

24、n 3 dB of the clipping level.Input/Output: 44.1/48 kHzPower adaptor (PA-20), CD-ROM, USB cable29 W322 mm X 108 mm X 416.6 mm5 kgOperating temperature: 0 to 40 C, Storage temperature: -20 to 60 C General Specifications4MW12 Analog Output SpecificationsWhere 0 dBu=0.775 Vrms and 0 dBV=1 VrmsOutput Con

25、nectorsST OUT (L, R)GROUP OUT (1-2)AUX SEND (1, 2)CH INSERT OUT(CHs 1 to 4)REC OUT (L, R)C-R OUT (L, R)PHONESOutput Impedance75 ohms150 ohms150 ohms600 ohms150 ohms100 ohmsAppropriateImpedance600 ohms line10 k ohms line10 k ohms line10 k ohms line10 k ohms line40 ohms phoneNominal Level+4 dBu (1.23

26、V)+4 dBu (1.23 V)0 dBu (0.775 V)10 dBV (316 mV)+4 dBu (1.23 V)3 mWMax. BeforeClipping+24 dBu (12.3 V)+20 dBu (7.75 V)+20 dBu (7.75 V)+10 dBV (3.16 V)+20 dBu (7.75 V)75 mWConnector SpecificationsXLR-3-32 type (balanced)Phone jack (TRS) (balancedT: hot; R: cold; S: ground)Phone jack (TRS)(impedance ba

27、lancedT: hot; R: cold; S: ground)Phone jack (TRS)(unbalanced T: out; R: in;S: ground)RCA pin jackPhone jack (TRS)(impedance balancedT: hot; R: cold; S: ground)Stereo phone jack Digital Input/Output SpecificationsConnectorUSBFormatUSB Audio 1.1Data Length16 bitConnector SpecificationUSB B type Analog

28、 Input SpecificationsWhere 0 dBu=0.775 Vrms and 0 dBV=1 Vrms* Input sensitivity: the lowest level that will produce an output of +4 dBu (1.23V) or the nominal output level when the unit is set to maximum gain. (All faders and level controls are maximum position.)Input ConnectorsMIC INPUT(CHs 1 to 4)

29、LINE INPUT(CHs 1 to 4)ST CH MIC INPUT(CH5(L)/CH6(R),CH7(L)/CH8(R)ST CH LINE INPUT(CH5(L)/CH6(R),CH7(L)/CH8(R)ST CH INPUT(CH9(L)/CH10(R),CH11(L)/CH12(R)CH INSERT IN(CHs 1 to 4)RETURN (L, R)2TR IN (L, R)Gain601634+10601634+10InputImpedance3 k ohms10 k ohms3 k ohms10 k ohms10 k ohms10 k ohms10 k ohms10

30、 k ohms Appropriate Impedance50 600 ohms mic600 ohms line50 600 ohms mic600 ohms line600 ohms line600 ohms line600 ohms line600 ohms lineSensitivity*80 dBu(0.078 mV)36 dBu(12.3 mV)54 dBu(1.55 mV)10 dBu(245 mV)80 dBu(0.078 mV)36 dBu(12.3 mV)54 dBu(1.55 mV)10 dBu(245 mV)30 dBu(24.5 mV)20 dBu(77.5 mV)1

31、2 dBu(195 mV)26 dBV(50.1 mV)NominalLevel60 dBu(0.775 mV)16 dBu(123 mV)34 dBu(15.5 mV)+10 dBu(2.45 V)60 dBu(0.775 mV)16 dBu(123 mV)34 dBu(15.5 mV)+10 dBu(2.45 V)10 dBu(245 mV)0 dBu(0.775 V)+4 dBu(1.23 V)10 dBV(316 mV)Max. BeforeClipping40 dBu(7.75 mV)+4 dBu(1.23 V)14 dBu(155 mV)+30 dBu(24.5 V)40 dBu(

32、7.75 mV)10 dBu(245 mV)14 dBu(155 mV)+30 dBu(24.5 V)+10 dBu(2.45 V)+20 dBu(7.75 V)+24 dBu(12.3 V)+10 dBV(3.16 V)ConnectorSpecificationsXLR-3-31 type(balanced)Phone jack (TRS)(balanced T: hot; R:cold;S: ground)XLR-3-31 type(balanced)Phone jack(unbalanced)Phone jack(unbalanced);RCA pin jackPhone jack (

33、TRS)(unbalancedT: out; R: in;S: ground)Phone jack(unbalanced)RCA pin jack5MW12 総合仕様全高調波歪率(MIC ST OUT)周波数特性(CH INPUT 1 11/12 ST OUT、GROUP OUT、AUXSEND、C-R OUT、REC OUT)& Rs=150 ohms、Gain= 最大、12.7 kHz、-6 dB/octave測定(20 kHz、- dB/octave相当)最大電圧(1 kHz)PAN/BAL：左右回切(1 kHz) 条件 (THD+N) 20 Hz 20 kHz +14 dBu 600

34、ohms、GAIN = 最小、= 20 Hz 20 kHz、出力1kHz、600 ohms (ST OUT)、10 k ohms (GROUP OUT、AUX SEND、C-R OUT、REC OUT)、GAIN = 最小(CH INPUT 1 7/8)、= 入力換算(CH INPUT 1 4 MIC)残留600 ohms (ST OUT)ST, GROUP 全Group 、ST =OFF (ST. GROUP OUT)AUX = 全= 最小(AUX SEND)ST, GROUP &1 = (ST. GROUP OUT)CH INPUT 1 4 MIC CH INSERT OUT (10 k

35、ohms)、Rs=150ohms、GAIN = 最大CH INPUT 1 7/8 MIC ST OUT (600 ohms)、GROUP OUT (10 kohms)、Rs=150 ohms、GAIN = 最大CH INPUT 1 7/8 MIC ST OUT (600 ohms)、GROUP to ST、Rs=150 ohms、GAIN = 最大CH INPUT 1 7/8 MIC REC OUT (10 k ohms)、Rs=150 ohms、GAIN = 最大CH INPUT 1 4 MIC AUX SEND (10 k ohms)、Rs=150 ohms、GAIN = 最大、PRECH

36、 INPUT 1 4 MIC AUX SEND (10 k ohms)、Rs=150 ohms、GAIN = 最大、POSTCH INPUT 5/6 7/8 LINE ST OUT (600 ohms)、GROUP OUT(10 k ohms)、Rs=150 ohms、GAIN = 最大CH INPUT 5/6 7/8 LINE AUX SEND (10 k ohms)、Rs=150ohms、GAIN = 最大、PRECH INPUT 5/6 7/8 LINE AUX SEND (10 k ohms)、Rs=150ohms、GAIN = 最大、POSTCH INPUT 9/10 11/12 S

37、T OUT (600 ohms)、GROUP OUT(10k ohms)、Rs=150 ohms、GAIN = 最大RETURN ST OUT (600 ohms)、Rs=150 ohmsRETURN AUX SEND(10 k ohms)、Rs=150 ohms2TR IN ST OUT (600 ohms)、Rs=600 ohms入力間入出力間最小-3.0標準060849462.276865847573416927.8最大0.11.0-128-100-88（92 dB S/N)-81（85 dB S/N)-64（68 dB S/N)-70-70単位dBdBudBudBudBudBudBdB

38、dBdBdBdBdBdBdBdBdBdBdBdBdB 電気的特性0 dBu = 0.775 Vrms出力150 ohms、/ 周波数：最大可変幅対3 dB 下電源/ PEAK USB 付属品消費電力最大外形寸法（W H D）質量温度80 Hz 12 dB/octave 15 dB ( 最大可変幅)HIGH：10 kHz ( )MID：2.5 kHz ( )LOW：100 Hz ( )PHANTOM DC+48 V 供給(XLR 入力端子)各：後（、後MIC 後）信号、手前3 dB 達赤点灯入出力44.1/48kHz電源(PA-20)、CD-ROM、USB 29 W322 mm 108 mm 4

39、16.6 mm5 kg動作温度: 0 40 、保管温度: -20 60 一般仕様6MW12 出力仕様0 dBu=0.775 Vrms、0 dBV=1 Vrms 出力端子名称ST OUT (L、R)GROUP OUT (1-2)AUX SEND (1-2)CH INSERT OUT(CH1 4)REC OUT (L、R)C-R OUT (L、R)PHONES出力75 ohms150 ohms150 ohms600 ohms150 ohms100 ohms適合600 ohms 10 k ohms 10 k ohms 10 k ohms 10 k ohms 40 ohms +4 dBu（1.23 V

40、）+4 dBu（1.23 V）0 dBu（0.775 V）-10 dBV（316 mV）+4 dBu（1.23 V）3 mW 最大 +24 dBu（12.3 V）+20 dBu（7.75 V）+20 dBu（7.75 V）+10 dBV（3.16 V）+20 dBu（7.75 V）75 mW 端子仕様XLR-3-32（型）（TRS）（型T：、R：、S：）（TRS）（型T：、R：、S：）（TRS）（型T：、R：、S：）RCA （TRS）（型T：、R：、S：） 入出力仕様端子名称USBUSB 1.1長16 bit端子仕様USB B 入力仕様0 dBu=0.775 Vrms、0 dBV=1 Vrms

41、 *1 入力感度：最大位置、+4 dBu (1.23V) 出力得最小入力 入力端子名称MIC INPUT(CH1 4）LINE INPUT(CH1 4)ST CH MIC INPUT(CH5(L)/CH6(R)、CH7(L)/CH8(R)ST CH LINE INPUT(CH5(L)/CH6(R)、CH7(L)/CH8(R)ST CH INPUT(CH9(L)/CH10(R)、CH11(L)/CH12(R)CH INSERT IN(CH1 4)RETURN (L、R)2TR IN (L、R)-60-16-34+10-60-16-34+10入力3 k ohms10 k ohms3 k ohms1

42、0 k ohms10 k ohms10 k ohms10 k ohms10 k ohms 適合50 600 ohms600 ohms 50 600 ohms600 ohms 600 ohms 600 ohms 600 ohms 600 ohms 感度*1-80 dBu（0.078 mV）-36 dBu（12.3 mV）-54 dBu（1.55 mV）-10 dBu（245 mV）-80 dBu（0.078 mV）-36 dBu（12.3 mV）-54 dBu（1.55 mV）-10 dBu（245 mV）-30 dBu（24.5 mV）-20 dBu（77.5 mV）-12 dBu（195 m

43、V）-26 dBV（50.1 mV）-60 dBu（0.775 mV）-16 dBu（123 mV）-34 dBu（15.5 mV）+10 dBu（2.45 V）-60 dBu（0.775 mV）-16 dBu（123 mV）-34 dBu（15.5 mV）+10 dBu（2.45 V）-10 dBu（245 mV）0dBu0.775 V）+4 dBu（1.23 V）-10 dBV（316 mV） 最大 -40 dBu（7.75 mV）+4 dBu（1.23 V）-14 dBu（155 mV）+30 dBu（24.5 V）-40 dBu（7.75 mV）-10 dBu（245 mV）-14 d

44、Bu（155 mV）+30 dBu（24.5 V）+10 dBu（2.45 V）+20 dBu（7.75 V）+24 dBu（12.3 V）+10 dBV（3.16 V） 端子仕様XLR-3-31 （型）（TRS）（型T：、R：、S：）XLR-3-31 （型）（型）（型）、RCA（TRS）（型T：、R：、S：）（型）RCA 7MW12 DIMENSIONS（寸法図）317.4102.62108322480322When mounted on rack*Refer to page 12 for the method of rack mounting. 325.6416.6（取付時）（取付方法12

45、参照下。）Unit: mm（単位: mm）8MW12 PANEL LAYOUT（） Channel Control Section（部）qGAIN ControlwPEAK Indicatore Switch (High Pass Filter)rEqualizer (HIGH, MID, and LOW)tAUX1 and AUX2 ControlsyPRE SwitchuPAN Control (1 to 4)PAN/BAL Control (5/6 and 7/8)BAL Control (9/10 and 11/12)iST SwitchoPFL (Pre-Fader Listen)

46、Switch!0GROUP Switch!1Channel FaderqGAINwPEAKe （）r（ HIGH 、 MID 、 LOW ）tAUX1 、 AUX2yPREuPAN（CH 1 4）PAN/BAL（CH 5/6、7/8）BAL（CH 9/10、11/12）iSToPFL!0GROUP!1Channels1 to 4(Monaural) Channels5 /6, 7/8(Stereo) Channels9/10,11/12(Stereo) qwweertttyyyuio!0!0!0!1!1!1uiouio9MW12 Master Control Section（部）!3uyte!

47、2!1roiwq!0qST Master FaderwGROUP 1-2 FadereTO ST SwitchrMaster SEND Master AUX 1/2 ControltRETURN AUX 1/2 Control ST Controly2TR IN/USB ControluPHANTOM +48V Switchi2TR IN/USB Switch (TO ST / TO C-R)oST/GROUP Switch!0C-R/PHONES Control!1Level Meter!2POWER Indicator!3PHONES JackqSTwGROUP 1-2eTO STrSEN

48、D AUX1/2 tRETURN AUX1/2 ST y2TR IN/USBuPHANTOM +48Vi2TR IN/USB（ TO ST/TO C-R ）oST/GROUP!0CR/PHONES!1!2POWER!3PHONES端子10MW12 Rear Input/Output Section（入出力部）qChannel Input Jacks MIC jacks (CHs 1 to 4, 5/6, 7/8) LINE jacks (CHs 1 to 4)wINSERT I/O JackseChannel Input Jacks (CHs 5/6 to 11/12) phone type

49、(CHs 5/6 to 11/12) RCA pin type (CHs 9/10, 11/12)rGROUP OUT (1,2) JackstST OUT (L, R) JacksyC-R OUT (L, R) JacksuSEND Jacks AUX1 and AUX2 jacksiRETURN L (MONO), R JacksoREC OUT (L, R) Jacks!02TR IN Jacks!1USB Connector!2POWER Switch!3AC ADAPTOR IN ConnectorqINPUT端子 MIC （CH 1 4、5/6、7/8） LINE （CH 14）w

50、INSERT I/O端子eINPUT端子（CH5/611/12）RCA （CH9/1011/12）rGROUP OUT （1、2）端子tST OUT （L、R）端子yC-R OUT （L、R）端子uSEND端子 AUX1 、 AUX2端子iRETURN L（MONO） 、 R端子oREC OUT （L、R）端子!02TR IN端子!1USB端子!2電源!3AC ADAPTOR IN端子qwe!0oiuy!2!1rt!311MW12Connector PolaritiesMIC INPUT, ST OUTPin 1: GroundPin 2: Hot (+)Pin 3: Cold (-)LINE