Yamaha-MW8CX-mix-sm 维修电路原理图.pdf

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1、SERVICE MANUALHAMAMATSU, JAPANSERVICE MANUALCopyright (c) Yamaha Corporation. All rights reserved. PDF & 07.06SPECIFICATIONS（総合仕様） .3/6CIRCUIT BOARD LAYOUT（） .9DIMENSIONS（寸法図） .9PANEL LAYOUT（） .10GENERAL SCHEMATIC DIAGRAM（総組立配線図） .14DISASSEMBLY PROCEDURE（分解手順） .18LSI PIN DESCRIPTION（LSI 端子機能表） .24IC

2、 BLOCK DIAGRAM（IC 図） .26CIRCUIT BOARD（基板図） .27INSPECTIONS（検査） .36/44PARTS LISTBLOCK DIAGRAM（）CIRCUIT DIAGRAM（回路図） CONTENTS（目次）PA011858MW8CXMW10CMW8CX: 20070625 MW10C: 20070625 RadioFans.CN 收音机爱 好者资料库MW8CX/MW10C2 WARNINGWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this produc

3、t contains LEAD. In addition, other electrical/electronic and/or plastic (Where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOL

4、DER, ELECTRICAL/ELECTRONIC 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

5、 the enclosure of this product, 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 that basic service procedures inherent to the industry, and more specifically Yamaha Products

6、, are already known 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 personal injury, destruction of expensive components and failure of the product to perform as specifie

7、d. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative.IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certificat

8、ion, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.The data provided is belived 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

9、 improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division.WARNING : Static discharges can destroy expensive c

10、omponents. Discharge any static electricity your body may have accumulated by grounding 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.Com

11、ponents having special characteristics are marked and must be replaced with parts having specifi cation equal to thoseoriginally installed.IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordIMPORTANT. The wires in this mains lead are coloured in accordance with the following code: BL

12、UE : NEUTRAL BROWN : LIVEAs the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals inyour plug proceed as follows:The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or colour

13、ed 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. This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (2 wires)

14、 印部品、安全維持重要部品。交換場合、安全必指定部品使用。RadioFans.CN 收音机爱 好者资料库3MW8CX/MW10C SPECIFICATIONS*MINTYPMAXUNIT1.0-3.0-3.0-3.01.01.00.1-128-87-85-64-100-70-70607658.29281765047261223.848VdBdBdBudB%Frequency Response20 Hz 20 kHzNominal output level 1 kHzEFFECT SEND(AUX SEND*)STEREO OUTSTEREO OUTSTEREO OUTSTEREO OUTSTE

15、REO OUTGAIN: min (CHs 15/6)MONITOR OUT, REC OUT+14 dBu, 20 Hz 20 kHz, Input Gain Control at mini-mumInput: CH INPUT 1, 2 MICEIN (Equivalent Input Noise): Rs = 150 , GAIN:maximum (CH1, 2) STEREO Master control at nominal level and all CH Level control at minimum.EFFECT SEND(AUX SEND*)All CH EFFECT (A

16、UX*) controls at minimum.Adjacent InputInput to OutputCH1, 2STEREO L/R, CH 1, 2, PAN: panned hard left or rightMIC to CH INSERT OUTMIC to STERO OUTMIC to REC OUTMIC to MONITOR OUTMIC to PHONES OUTMIC to EFFECT SEND (AUX SEND*)LINE to EFFECT SEND (AUX SEND*)LINE to STEREO OUTRETURN to STEREO OUT2TR I

17、N to STEREO OUTno loadMICST CH 7/8, (CHs 7/8, 9/10*) to STEREO OUTSTEREO Master control and one CH level controlat nominal level (CH1, 2)Residual Output NoiseRs = 150 INPUT GAIN: maximumRs = 150 Rs = 600 Total Harmonic Distortion(THD + N)Hum & NoiseCrosstalk (1 kHz)Phantom VoltageInput HPFCHs 1 5/6,

18、 80 Hz, 12 dB/octUSB AudioInput/Output: 44.1/48 kHzPEAK IndicatorInternal Digital Effect(Only MW8CX)Hum & Noise are measuredwith a 6 dB/octave filter 12.7 kHz; equivalent to a 20 kHz filter with infinite dB/octave attenuation.Maximum Voltage Gain (1 kHz)All level controls are maxi-mum when measuredP

19、AN/BAL: panned hard left or hard right.Electrical SpecificationsGeneral SpecificationsInput EqualizationTurn over/roll-off frequencyof shelving: 3 dB belowmaximum variable level.15 dB maximumPEAK lights if the signal level reaches 3 dB below the clipping level.AC 38 VCT, 0.62 A, Cable Length = 3.6 m

20、21 W256.6 mm x 62.2 mm x 302.5 mm1.7 kg (MW8CX), 1.6 kg (MW10C)LED Level MetePower Supply AdaptorDimensions (W x H x D)Net WeightPower ConsumptionPre MONITOR LevelCHs 1 5/6CH 7/8 (CHs 7/8, 9/10*)PA-102x7 points LED meter (PEAK, +6, +3, 0, -5, -10, -20 dB)HIGH: 10 kHz (shelving)HIGH: 10 kHz (shelving

21、)MID: 2.5 kHz (peaking)LOW: 100 Hz (shelving)LOW: 100 Hz (shelving)Red LED turns on when post EQ signal (either post MIC HA or post EQ signalfor CHs 3/4, 5/6) reaches -3 dB below clipping (+17 dBu).16 PROGRAM, PARAMETER controlFoot Switch (Digital Effect On/Off)All level controls are nominal if not

22、specified.Output impedance of signal generator: 150 ohmsThe MW8CX feature is described first, followed by the MW10C feature in brackets: MW8CX (MW10C)MW8CX/MW10C4Analog Input SpecificationsWhere 0 dBu = 0.775 Vrms and 0 dBV= 1 Vrms* Sensitivity :The lowest level that will produce an output of +4 dB

23、(1.23 V), or the nominal output level when the unit is set to the maximum level. (All level controls are at their maximum position.)Analog Output SpecificationsWhere 0 dBu = 0.775 Vrms and 0 dBV= 1 Vrms* The MW8CX feature is described first, followed by the MW10C feature in brackets: MW8CX (MW10C)Di

24、gital Input/Output SpecificationsInput ConnectorsGainInputImpedanceAppropriateImpedanceSensitivity *NominalLevelMax. beforeClippingConnectorSpecificationsCH INPUT MIC (CHs 1, 2)-60 dB3 k50600 Mics-72 dBu (0.195 mV)-60 dBu (0.775 mV)-40 dBu (7.75 mV)XLR-3-31 type (balanced 1 = GND, 2= HOT, 3 = COLD)-

25、16 dB-28 dBu (30.8 mV)-16 dBu (123 mV)+4 dBu (1.23V)CH INPUT LINE (CHs 1, 2)-34 dB10 k600 Lines-46 dBu (3.88 mV)-34 dBu (15.5 mV)-14 dBu (155 mV)TRS phone jack (balanced Tip = HOT, Ring = COLD, Sleeve = GND)+10 dB- 2 dBu (0.615 V)+10 dBu (2.45 V)+30 dBu (24.5 V)ST CH MIC INPUT(CHs 3/4, 5/6)-60 dB3 k

26、50600 Mics-72 dBu (0.195 mV)-60 dBu (0.775 mV)-40 dBu (7.75 mV)XLR-3-31 type (balanced 1 = GND, 2= HOT, 3 = COLD)-16 dB-28 dBu (30.8 mV)-16 dBu (123 mV)-6 dBu (389 mV)ST CH LINE INPUT(CHs 3/4, 5/6)-34 dB10 k600 Lines-46 dBu (3.88 mV)-34 dBu (15.5 mV)-14 dBu (155 mV)Phone jack (unbalanced)+10 dB- 2 d

27、Bu (0.615 V)+10 dBu (2.45 V)+30 dBu (24.5V)ST CH INPUT (CH 7/8 (CHs 7/8, 9/10)*)10 k600 Lines-22 dBu (61.5 mV)-10 dBu (245 mV)+10 dBu (2.45 V)Phone jack (unbalanced)RCA pin jackCH INSERT IN (CHs 1, 2)10 k600 Lines-12 dBu (195 mV)0 dBu (0.775 V)+20 dBu (7.75 V)TRS phone jack (unbalanced Tip = Out, Ri

28、ng = In, Sleeve = GND)RETURN (L, R)10 k600 Lines- 8 dBu (308 mV)+4 dBu (1.23 V)+24 dBu (12.3 V)Phone jack (unbalanced)2TR IN (L, R)10 k600 Lines-22 dBV (79.4 mV)-10 dBV (0.316 V)+10 dBV (3.16 V)RCA pin jackOutput ConnectorsOutputImpedanceAppropriateImpedanceNominal LevelMax. beforeclippingConnector

29、SpecificationsSTEREO OUT (L, R)150 10 k Lines+4 dBu (1.23 V)+20 dBu (7.75 V)TRS phone jack (impedance balanced Tip = HOT, Ring = COLD, Sleeve = GND)EFFECT SEND (AUX SEND*)150 10 k Lines+4 dBu (1.23 V)+20 dBu (7.75 V)TRS phone jack (impedance balanced Tip = HOT, Ring = COLD, Sleeve = GND)CH INSERT OU

30、T (CHs 1, 2)75 10 k Lines0 dBu (0.775 V)+20 dBu (7.75 V)TRS phone jack (unbalanced Tip = OUT,Ring = IN, Sleeve = GND)REC OUT (L, R)600 10 k Lines-10 dBV (0.316 V)+10 dBV (3.16 V)RCA Pin jackMONITOR OUT (L, R)150 10 k Lines+4 dBu (1.23 V)+20 dBu (7.75 V)TRS phone jack (impedance balanced Tip = HOT, R

31、ing = COLD, Sleeve = GND)PHONES OUT100 40 Phones3 mW75 mWTRS phone jackConnectorFormatData LengthConnector SpecificationUSBUSB Audio 1.116 bitUSB B type5MW8CX/MW10C* “LFO” stands for Low Frequency Oscillator. An LFO is normally used to modulate another signal, determining the modulation speed and wa

32、veform shape.NoProgramParameterDescription1REVERB HALL 1REVERB TIMEReverb simulating a large space such as a concert hall.2REVERB HALL 2REVERB TIME3REVERB ROOM 1REVERB TIMEReverb simulating the acoustics of a small space (room).4REVERB ROOM 2REVERB TIME5REVERB STAGE 1REVERB TIMEReverb simulating a l

33、arge stage.6REVERB STAGE 2REVERB TIME7REVERB PLATEREVERB TIMESimulation of a metal-plate reverb unit, producing a more hard-edged sound.8DRUM AMBIENCEREVERB TIMEA short reverb that is ideal for use with kick drum.9KARAOKE ECHODELAY TIMEEcho designed for karaoke (sing-along) applications.10VOCAL ECHO

34、DELAY TIMEEcho suitable for vocals.11CHORUS 1LFO FrequencyCreates a thick sound by modulating the delay time.The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time.12CHORUS 2LFO Frequency13FLANGERLFO FrequencyA sweeping pitched effect.The PARAMETER control adjusts the

35、frequency of the LFO* that modulates the delay time.14PHASERLFO FrequencyPhase modulation produces a cyclical phasing effect.The PARAMETER control adjusts the frequency of the LFO* that modulates the delay time.15AUTO WAHLFO FrequencyA wah-wah effect with cyclical filter modulation.The PARAMETER con

36、trol adjusts the frequency of the LFO* that modulates the delay time.16DISTORTIONDRIVEAdds a sharp-edged distortion to the sound.Digital Effect Program List (Only MW8CX)MW8CX/MW10C6 総合仕様 電気的特性 一般仕様* MW8CX (MW10C)表示。zHk84/ zHk1.44力出入周波数特性全高調波歪率 (THD+N)最大電圧 (1 kHz)測定時、全最大PAN/BAL: 左右回切電源 & 12.7 kHz、 6

37、dB/octave 測定(20 kHz、- dB/octave相当 )（1 kHz）STEREO OUTSTEREO OUTEFFECT SEND(AUX SEND*)MONITOR OUT、REC OUTRs = 150 Rs = 150 Rs = 600 INPUT GAIN: 最大MIC入力: CH INPUT 1、STEREO OUTSTEREO OUTSTEREO OUTEFFECT SEND(AUX SEND*)入力間入出力間2 MIC残留GAIN：最小（CH15/6）20 Hz20 kHz出力 1 kHz+14dBu、20 Hz20 kHz、入力換算 : Rs = 150 、GA

38、IN: 最大 (CH1、2)STEREO : 、全 : 最小全 EFFECT (AUX*) : 最小STEREO&CH1、2：MIC CH INSERT OUTMIC STEREO OUTLINE STEREO OUTST CH 7/8、(CH 7/8、9/10*) STEREO OUT2TR IN STEREO OUTRETURN STEREO OUT負荷MIC REC OUTMIC MONITOR OUTMIC PHONES OUTMIC EFFECT SEND (AUX SEND*)LINE EFFECT SEND (AUX SEND*)GAIN : 最小CH1、2STEREO L/R、

39、CH 1、2、PAN:左右回切最大 15 dB/ 周波数:最大可変幅対3 dB下PEAK 内蔵 (MW8CX)LED電源消費電力最大外形寸法 (W H D)質量USBCH 15/6CH 7/8 (CH 7/8、9/10*)調整前PA-10CH 15/6、80 Hz、12 dB/octHIGH: 10 kHz ()MID: 2.5 kHz ()LOW: 100 Hz ()HIGH: 10 kHz ()LOW: 100 Hz ()後信号 (CH3/4、5/6 MIC 後後信号) 手前 3 dB (+17 dBu) 達赤点灯16、PARAMETER ( / )2x7LED (PEAK、+6、+3、0

40、、-5、-10、-20 dB)信号手前3 dB 達PEAK点灯AC 38 VCT、0.62 A、長: 3.6 m21 W256.6 mm 62.2 mm 302.5 mm1.7 kg (MW8CX)、1.6 kg (MW10C)特指定場合、位置。出力 : 150MINTYPMAXUNIT-3.01.0dB-3.01.0-3.01.00.1%-128dBu-87-85-64-100-70dB07-06dB672.85291867057462218.32V847MW8CX/MW10C 入力仕様0 dBu = 0.775 Vrms、0 dBV= 1Vrms* 入力感度: 最大設定時+4 dB (1.

41、23 V)出力得最小(最大)。 出力仕様0 dBu = 0.775 Vrms、0 dBV= 1Vrms* MW8CX (MW10C)表示。 入出力仕様入力端子名称入力適合感度*最大端子仕様CH INPUT MIC(CH 1、 2)-60 dB3 k50600Mics-72 dBu (0.195mV)-60 dBu (0.775 mV)-40 dBu (7.75mV)XLR-3-31(型 1 = 、2= 、3 = )V32.1(uBd4+)Vm321(uBd61-)Vm8.03(uBd82-Bd61-CH INPUT LINE(CH 1、 2)-34 dB10 k600 Lines-46 dBu

42、 (3.88 mV)-34 dBu (15.5 mV)-14 dBu (155 mV)TRS(型 T = 、R =、S= )V5.42(uBd03+)V54.2(uBd01+)V516.0(uBd2-Bd01+ST CH MICINPUT(CH 3/4、 5/6)-60 dB3 k50600Mics-72 dBu (0.195mV)-60 dBu (0.775 mV)-40 dBu (7.75mV)XLR-3-31(型 1 = 、2= 、3 = )Vm983(uBd6-)Vm321(uBd61-)Vm8.03(uBd82-Bd61-ST CH LINEINPUT(CH 3/4、 5/6)-34

43、 dB10 k600 Lines-46 dBu (3.88 mV)-34 dBu (15.5 mV)-14 dBu (155 mV)(型)V5.42(uBd03+)V54.2(uBd01+)V516.0(uBd2-Bd01+ST CH INPUT(CH 7/8(CH 7/8、 9/10)*)10 k600 Lines-22 dBu (61.5 mV)-10 dBu (245 mV)+10 dBu (2.45 V)(型)RCACH INSERT IN(CH 1、 2)10 k600 Lines-12 dBu (195 mV)0 dBu (0.775 V)+20 dBu (7.75 V)TRS(型

44、T = 、 R = 、S= )RETURN (L、R)10 k600 Lines-8 dBu (308 mV)+4 dBu (1.23 V)+24 dBu (12.3 V)(型)2TR IN(L、R)10 k600 Lines-22 dBV (79.4 mV)-10 dBV (0.316 V)+10 dBV (3.16 V)RCA出力端子名称出力適合最大端子仕様STEREO OUT (L、 R)150 10 k Lines+4 dBu (1.23 V)+20 dBu (7.75 V)TRS(型 T = 、R =、 S = )EFFECT SEND(AUX SEND*)150 10 k Line

45、s+4 dBu (1.23 V)+20 dBu (7.75 V)TRS(型 T = 、R =、 S = )CH INSERT OUT(CH 1、 2)75 10 k Lines0 dBu (0.775 V)+20 dBu (7.75 V)TRS(型T=、R=、S=)REC OUT (L、 R)600 10 k Lines-10 dBV (0.316 V)+10 dBV (3.16 V)RCAMONITOR OUT (L、R)150 10 k Lines+4 dBu (1.23 V)+20 dBu (7.75 V)TRS(型 T = 、R =、 S = )PHONES OUT100 40 Pho

46、nes3 mW75mWTRS端子名称長端子仕様USBUSB 1.116 bitUSB BMW8CX/MW10C8広空間（残響効果）。小空間（部屋）響。広。鉄板。硬残響感得。適短。使用想定。用想定。異遅延時間音複数加、音厚加。PARAMETER、遅延時間変調LFO (*) 周波数調整。音色音程感強加。PARAMETER、遅延時間変調LFO (*) 周波数調整。音位相変化、音加。PARAMETER、位相変調LFO (*) 周波数調整。周期的変化効果加。PARAMETER、制御LFO (*) 周波数調整。音歪、効果加。 PROGRAM 一覧（MW8CX）NoProgramParameter内容123

47、45678910111213141516REVERB HALL 1REVERB TIMEREVERB HALL 2REVERB TIMEREVERB ROOM 1REVERB TIMEREVERB ROOM 2REVERB TIMEREVERB STAGE 1REVERB TIMEREVERB STAGE 2REVERB TIMEREVERB PLATEREVERB TIMEDRUM AMBIENCEREVERB TIMEKARAOKE ECHODELAY TIMEVOCAL ECHODELAY TIMECHORUS 1LFO 周波数CHORUS 2LFO 周波数FLANGERLFO 周波数P

48、HASERLFO 周波数AUTO WAHLFO 周波数DISTORTIONDRIVE* LFO: Low Frequency Oscillator（低周波発振器）略。別信号周期的変化（変調）場合使。9MW8CX/MW10C CIRCUIT BOARD LAYOUT DIMENSIONS（）（寸法図）55.2262.2256.6302.5300Unit （単位） : mmMW8CXBottom case assembly（Ass y）MAIN8UMAIN part (MW8CX)MAIN10UMAIN part (MW10C)MAIN8UJACK part (MW8CX)DSPUSB(MW8CX

49、 only)MAIN10UJACK part (MW10C)MW8CX/MW10C10Channels1 and 2 (Monaural)MW8CXChannels3/4 and 5/6 (Stereo)Channels7/8 (7/8 and 9/10) (Stereo)? PANEL LAYOUTq MIC Input Jacks (CHs 1 to 5/6)w LINE Input Jacks (CHs 1, 2)e LINE Input Jacks (CHs 3/4 to 7/8 (CHs 3/4 to 9/10)r LINE Input Jacks (CH 7/8, (CHs 7/8

50、, 9/10)t INSERT Jacks (CHs 1, 2)y GAIN Controlu 80 Switch (High Pass Filter)i COMP Controlo PEAK Indicator!0 Equalizer (HIGH, MID, and LOW)!1 EFFECT (AUX) Control!2 PAN Control (CHs 1, 2) PAN/BAL Control (CHs 3/4, 5/6) BAL Control (CH 7/8 (CHs 7/8, 9/10)!3 Level Control Channel Control Section （部）Th