Yamaha-MW12C-mix-sm 维修电路原理图.pdf

SERVICE MANUALSPECIFICATIONS （総合仕様） .3/5DIMENSIONS （寸法図）.7PANEL LAYOUT （） .8CIRCUIT BOARD LAYOUT （）.12WIRING DIAGRAM （基板結線図） .13MW12CX OVERALL ASSEMBLY WIRING （MW12CX 総組立配線図） .14MW12C OVERALL ASSEMBLY WIRING （MW12C 総組立配線図） .19MW12CX DISASSEMBLY PROCEDURES （MW12CX 分解手順） .24MW12C DISASSEMBLY PROCEDURES （MW12C 分解手順） .27LSI PIN DESCRIPTION （LSI端子機能表） .30IC BLOCK DIAGRAM （IC図） .32CIRCUIT BOARDS （基板図） .35INSPECTIONS （検査） .45/53PARTS LISTIC & DIODE FIGURES （外形図）BLOCK & LEVEL DIAGRAM （&）CIRCUIT DIAGRAM （回路図）I CONTENTS （目次）PA011859Copyright (c) Yamaha Corporation. All rights reserved. 07.06HAMAMATSU, JAPAN（ECF：無塩素系漂白）使用。This document is printed on chlorine free (ECF) paper.MW12CX: 20070625 MW12C: 20070625 MW12CXMW12CRadioFans.CN 收音机爱 好者资料库MW12CX/MW12C2IWARNINGComponents 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 havetherefore 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 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 establish 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 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 accumulated 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.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product 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 causecancer and/or birth defects or other reproductive harm.DO NOT 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 located inside the enclosure of this product, wash your hands before handling food.IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordWARNING:THIS 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 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 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.RadioFans.CN 收音机爱 好者资料库MW12CX/MW12C3ISPECIFICATIONS Electrical Specifications General SpecificationsMW12CX/MW12C4 Analog Input Specifications Analog Output Specifications Digital Input/Output SpecificationsMW12CX/MW12C5 総合仕様電気的特性一般仕様MW12CX/MW12C6入力仕様出力仕様入出力仕様MW12CX/MW12C7I DIMENSIONS （寸法図）346.2433.986.1436.679.62Unit: mm単位：mmMW12CXMW12CX/MW12C8I PANEL LAYOUT （） Channel Control Section （部）MIC Input Jacks (CHs 1 to 4, 5/6, 7/8)LINE Input Jacks (CHs 1 to 4)LINE Input Jacks (CHs 5/6 to 11/12)LINE Input Jacks (CHs 9/10, 11/12)INSERT Jacks (CHs 1 to 4)GAIN Control 80 Switch (High Pass Filter)COMP ControlPEAK IndicatorEqualizer (HIGH, MID, and LOW)AUX (AUX1) ControlAUX PRE SwitchEFFECT (AUX2) ControlsPAN Control (1 to 4)PAN/BAL Control (5/6 and 7/8)BAL Control (9/10 and 11/12)ON SwitchPFL (Pre-Fader Listen) SwitchREC SwitchST SwitchChannel Fader1234567890ABCDEFGHI1234567890ABCDEFGHIMIC入力端子 （CH14、5/6、7/8）LINE入力端子 （CH14）LINE入力端子 （CH5/611/12）LINE入力端子 （CH9/10、11/12）INSERT端子 （CH14）GAIN 80 （） COMPPEAKEQ （：HIGH、MID、LOW）AUX （AUX1） AUX PREEFFECT （AUX2） PAN （CH14）PAN/BAL （CH5/6、7/8）BAL （CH9/10、11/12）ONPFLRECSTMW12CX12567890ACBDEFHGI00IHGEFACD9B671334IHGFEDBCAChannels1 to 4(Monaural)14（）Channels5/6 and 7/8(Stereo)5/6、7/8（）Channels9/10 and 11/12(Stereo)9/10、11/12（）MW12CX/MW12C9 Master Control Section （部）1234567890ABCDEFGH2TR IN JacksREC OUT 1 (L, R) JacksREC OUT 2 (L, R) JacksRETURN L (MONO), R JacksSEND JacksAUX (AUX1)EFFECT (AUX2)STEREO OUT (L, R) JacksXLR jacksLINE jacksMONITOR OUT JacksPHONES JackPHANTOM +48 V SwitchRETURNAUX (AUX1) ControlSTEREO ControlMaster SENDMaster AUX (AUX1) ControlMaster EFFECT (AUX2) ControlPOWER IndicatorLevel MeterMONITOR/PHONESMONITOR SwitchMONITOR ControlPHONES Control2TR IN/USB2TR IN/USB Switch2TR IN/USB controlREC OUT FaderST SwitchSTEREO OUT Master Fader1234567890ABCDEFGH2TR IN端子REC OUT 1 （L、R） 端子REC OUT 2 （L、R） 端子RETURN L （MONO） 、R端子SEND端子 AUX （AUX1） EFFECT （AUX2）STEREO OUT （L、R） 端子 XLR端子 LINE端子MONITOR OUT端子PHONES端子PHANTOM +48 VRETURN AUX （AUX1） STEREOSEND AUX （AUX1） EFFECT （AUX2） POWERMONITOR/PHONES 信号切替 MONITOR PHONES2TR IN/USB 出力先切替 2TR IN/USBREC OUTSTSTEREO OUTFGBHC09ADE68142735MW12CXMW12CX/MW12C10 Digital Effects Section （部）*Only the MW12CX has digital effects. （機能MW12CX 内蔵。 ）FOOT SWITCH JackPROGRAM DialPARAMETER ControlAUX ControlON SwitchPFL SwitchEFFECT RTN Fader1234567FOOT SWITCH端子PROGRAM選択PARAMETERAUXONPFLEFFECT RTN1234567 Rear Input/Output Section （入出力部）POWER SwitchAC ADAPTOR IN ConnectorUSB Connector123電源AC ADAPTOR IN端子USB端子123MW12CX4357216312MW12CX/MW12C11 Connector Polarities 端子接続極性MW12CX/MW12C12I CIRCUIT BOARD LAYOUT （）Rear（）Front（）MIX12UXMIX12U(MW12CX)(MW12C)JK12UXJK12U(MW12CX)(MW12C)DSP2(MW12CX only)PS12XPS12(MW12CX)(MW12C)USBUSB(MW12CX)(MW12C)MW12CX/MW12C13I WIRING DIAGRAM （基板結線図）Remarks備考9P-2907P-1805P-180No.Part No.Assembly Name線材名Connection接続123WJ914800WH499400WH499500JK12-CN10 USB-CN101JK12-CN9 PS-CN02MIX12-CN9 PS-CN03Connector AssemblyConnector AssemblyConnector AssemblyUSBMW12C束線PS124C束線PH束線Location254244(MW12CX)CN101(9P)CN02(7P)CN03(5P)CN10(9P)CN9(7P)CN4(9P)CN5(9P)CN6(9P)CN7(3P)CN8(9P)CN1(9P)CN2(9P)CN3(9P)CN4(9P)CN5(9P)CN6(9P)CN7(3P)CN8(9P)CN1(9P)CN2(9P)CN3(9P)CNM02(20P)CN10(20P)CN9(5P)23PS12XPS12(MW12CX)(MW12CX)(MW12C)USB(MW12C)MIX12UXMIX12U(MW12CX)(MW12C)JK12UXJK12U(MW12CX)(MW12C)DSP2USB(MW12CX only)1MW12CX/MW12C14I MW12CX OVERALL ASSEMBLY WIRING （MW12CX 総組立配線図）1.The Wiring of the PS12X Circuit Board （PS12X配線）Connect the wires according to the following table and figure after installing the PS12X circuit board to the bottom caseassembly.（Ass yPS12X取付後、下記表/図従配線。）CN02CN03WH499400Connector assembly PS124CWH499500Connector assembly PS124CXWH905200PS12X circuit boardWH499400WH499500Connector assembly PS124CConnector assembly PS124CXCN02CN03PS12X circuit boardMW12CXWH905200PartsWiring point(Location/Circuit board)2.Processing Method of Connector Assembly USBMW12C（USBMW12C束線処理）Note) Connect the connector assembly USBMW12Cto the USB circuit board beforehand.（事前USBMW12C束線USB接続。）USBWG644500WJ914800Connector assembly USBMW12CMW12CX/MW12C153.The Wiring of the JK12UX Circuit Board and MIX12UX Circuit Board（JK12UXMIX12UX配線）1.Install the JK12UX circuit board to the bottom case assembly.（JK12UXAss y取付。）Note) Pass the connector assembly USBMW12C through the incision part of the JK12UX circuit board as shown inthe picture below.（下写真USBMW12C束線JK12UX切欠通。）MW12CXJK12UXWJ540200WJ914800Connector assembly USBMW12CNote) Connect the connector assembly USBMW12C to CN10 of the JK12UX circuit board, and fix it with style pinK2 as shown in the picture below.（下写真USBMW12C束線JK12UXCN10接続、K2固定。）JK12UXWJ540200WJ914800Connector assembly USBMW12CK2CN10MW12CX/MW12C162.Install the MIX12UX circuit board to the bottom case assembly.（MIX12UXAss y取付。）Note) Put out the two connector assemblies PS124C and PS124CX through CN6 and CN8 as shown in the picturebelow.（下写真PS12X接続線材JK12UXMIX12UX間、CN6、CN8間出。）Note) Take care not to pinch the two connector assemblies between the shield DSP2 and the JK12UX circuit board.（PS12X接続線材2種DSP2JK12UX注意。）3.Connect the wires according to the table below.（下表従配線。）4.Fix the connector assembly PS124C with style pin K1 on the JK12UX circuit board.（線材PS124CJK12UXK1固定。）5.Fix the connector assembly PS124CX with style pin K1 on the MIX12UX circuit board.（線材PS124CXMIX12UXK1固定。）WH499400WH499500Connector assembly PS124CConnector assembly PS124CXCN9CN9JK12UX circuit boardMIX12UX circuit boardWJ540200WJ540300PartsWiring point(Location/Circuit board)Note) Take care not to pinch the two connector assemblies between the shield DSP and the JK12UX circuit board.（PS12X接続線材DSPJK12UX注意。）JK12UXWJ540200MIX12UXWJ540300K1K1CN6CN8CN7CN7CN9CN9WH499400Connector assembly PS124CWH499500Connector assembly PS124CXMW12CXMW12CX/MW12C176.Connect each CN1-CN8 on the JK12UX circuit board and MIX12UX circuit board using jumper wire.（JK12UXMIX12UX上CN1-CN8接続。）7.Bend the jumper-wires of CN1, CN2.（CN1、CN2線折曲。）a. Bend the Jumper-wires in the direction toward the MIX12UX circuit board.（線MIX12UX方向折曲。）b. Turn the Jumper-wires in the direction toward the JK12UX circuit board.（線JK12UX方向折返。）c. Press the jumper-wires so that their height from the MIX12UX circuit boards component side become 15 mm orless.（折曲後、線、MIX12UX面15 mm以下上押。）CN1CN2CN3CN4CN5CN6CN7CN8JK12UXWJ540200MIX12UXWJ540300JK12UXWJ540200MIX12UXWJ540300bac15 mmMW12CXMW12CX/MW12C18MW12CX8.Bend the jumper-wires of CN3-CN8.（CN3-CN8線折曲。）a. Bend the Jumper-wires in the shape of “M” letter.（線 “M” 字形状折曲。）b. Process the Jumper-wires so that their height from the MIX12UX circuit boards component side become 15 mmor less.（折曲後、MIX12UX面15 mm以下線処理。）Notes) Keep the Jumper-wire CN3 from contact with the electrolytic capacitor C229.（線CN3C229接触。）Incline the electrolytic capacitor C229 before bending the Jumper-wire CN3.（線CN3折曲前、C229傾。）JK12UXWJ540200MIX12UXWJ54030015 mmBend the Jumper-wires in theshape of M character.C229Incline the electrolytic capacitor (C229).MW12CX/MW12C191.The Wiring of the PS12 Circuit Board （PS12配線）Connect the wires according to the following table and figure after installing the PS12 circuit board to the bottom caseassembly.（Ass yPS12取付後、下記表/図従配線。）WH499400Connector assembly PS124CCN02PS12 circuit boardWH903200PartsWiring point(Location/Circuit board)MW12CCN02WH499400Connector assembly PS124CWH903200PS12 circuit boardI MW12C OVERALL ASSEMBLY WIRING （MW12C 総組立配線図）2.Processing Method of Connector Assembly USBMW12C（USBMW12C束線処理）Note) Connect the connector assembly USBMW12Cto the USB circuit board beforehand.（事前USBMW12C束線USB接続。）USBWG644500WJ914800Connector assembly USBMW12CMW12CX/MW12C20MW12C3.The Wiring of the JK12U Circuit Board and MIX12U Circuit Board（JK12UMIX12U配線）1.Install the JK12U circuit board to the bottom case assembly.（JK12UAss y取付。）Note) Pass the connector assembly USBMW12C through the incision part of the JK12U circuit board as shown inthe picture below.（下写真USBMW12C束線JK12U切欠通。）Note) Connect the connector assembly USBMW12C to CN10 of the JK12U circuit board, and fix it with style pin K2as shown in the picture below.（下写真USBMW12C束線JK12UCN10接続、K2固定。）JK12UWH109500WJ914800Connector assembly USBMW12CJK12UWH109500WJ914800Connector assembly USBMW12CK2CN10MW12CX/MW12C21MW12CWH499400Connector assembly PS124CCN9JK12U circuit boardWH109500PartsWiring point(Location/Circuit board)2.Install the MIX12U circuit board to the bottom case assembly.（MIX12UAss y取付。）Note) Put out the connector assembly PS124C through CN6 and CN8 as shown in the picture below.（下写真PS12接続線材JK12UMIX12U間、CN6、CN8間出。）3.Connect the wires according to the table below.（下表従配線。）4.Fix the connector assembly PS124C with style pin K1 on the JK12U circuit board.（線材PS124CJK12UK1固定。）JK12UWH109500MIX12UWH109600K1CN6CN8CN7CN9WH499400Connector assembly PS124CMW12CX/MW12C225.Connect each CN1-CN8 on the JK12U circuit board and MIX12U circuit board using jumper wire.（JK12UMIX12U上CN1-CN8接続。）6.Bend the jumper-wires of CN1, CN2.（CN1、CN2線折曲。）a. Bend the Jumper-wires in the direction toward the MIX12U circuit board.（線MIX12U方向折曲。）b. Turn the Jumper-wires in the direction toward the JK12U circuit board.（線再度JK12U方向折返。）c. Press the jumper-wires so that their height from the MIX12U circuit boards component side become 15 mm orless.（折曲後、線、MIX12U面15 mm以下上押。）CN1CN2CN3CN4CN5CN6CN7CN8JK12UWH109500MIX12UWH109600JK12UWH109500MIX12UWH109600bac15 mmMW12CMW12CX/MW12C23MW12C7.Bend the jumper-wires of CN3-CN8.（CN3-CN8線折曲。）a. Bend the Jumper-wires in the shape of “M” letter.（線 “M” 字形状折曲。）b. Process the Jumper-wires so that their height from the MIX12U circuit boards component side become 15 mm orless.（折曲後、MIX12U面15 mm以下線処理。）Notes) Keep the Jumper-wire CN3 from contact with the electrolytic capacitor C229.（線CN3C229接触。）Incline the electrolytic capacitor C229 before bending the Jumper-wire CN3.（線CN3折曲前、C229傾。）15 mmBend the Jumper-wires in theshape of M character.JK12UWH109500MIX12UWH109600C229Incline the electrolytic capacitor (C229).MW12CX/MW12C24I MW12CX DISASSEMBLY PROCEDURES （MW12CX 分解手順）1.Top Cover (Time required: 10 min.)1-1Remove the eight (8) fader knobs marked 240, two (2)fader knobs marked 250, fader knob marked 260 andknob select marked 300. (Fig. 1)1-2Remove the twenty-three (23) screws marked 180, two(2) screws marked 350, screw marked 185, twenty-eight (28) hexagonal nuts and twenty-eight (28) wash-ers. (Fig. 1)1-3The top cover can then be removed. (Fig. 1)*When installing the top cover on the bottom caseassembly, tighten the screws in the order shown inFig. 1. (Fig. 1)1. （所要時間：10分）1-1240 FADER8個、 250 FADER2個、260 FADER、 300 SELECT外。 （Fig. 1）1-2180 23本、 350 2本、 185 、六角28個、28個外。 （Fig. 1）1-3外。 （Fig. 1） Ass y取付、Fig. 1示順序締。（Fig. 1）180:Bind Head Tapping Screw-B 3x8 MFZN2B3 (WE774400) BBIND185:Bind Head Screw 3x6 MFZN2B3 (WE878300) 小BIND240:Fader Knob Black/L-Gray (V9664900) FADER250:Fader Knob