Yamaha-MW-12-C-MW-12-CX-Service-Manual (1)电路原理图.pdf

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1、SERVICE MANUAL SPECIFICATIONS （総合仕様） .3/5 DIMENSIONS （寸法図）.7 PANEL LAYOUT （） .8 CIRCUIT BOARD LAYOUT （）.12 WIRING DIAGRAM （基板結線図） .13 MW12CX OVERALL ASSEMBLY WIRING （MW12CX 総組立配線図） .14 MW12C OVERALL ASSEMBLY WIRING （MW12C 総組立配線図） .19 MW12CX DISASSEMBLY PROCEDURES （MW12CX 分解手順） .24 MW12C DISASSEMBLY

2、PROCEDURES （MW12C 分解手順） .27 LSI PIN DESCRIPTION （LSI端子機能表） .30 IC BLOCK DIAGRAM （IC図） .32 CIRCUIT BOARDS （基板図） .35 INSPECTIONS （検査） .45/53 PARTS LIST IC & DIODE FIGURES （外形図） BLOCK & LEVEL DIAGRAM （&） CIRCUIT DIAGRAM （回路図） I CONTENTS （目次） PA011859 Copyright (c) Yamaha Corporation. All rights reserve

3、d. 07.06 HAMAMATSU, JAPAN （ECF：無塩素系漂白）使用。 This document is printed on chlorine free (ECF) paper. MW12CX: 20070625 MW12C: 20070625 MW12CXMW12C RadioFans.CN 收音机爱 好者资料库 MW12CX/MW12C 2 IWARNING Components having special characteristics are marked and must be replaced with parts having specification equa

4、l to those originally installed. 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 NOTICE This 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, are

5、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, destruc- tion of expensive components and failure of the product to perform as specified. Fo

6、r 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, certification,

7、recognition of any 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 service departments of Yamaha are continually striving to im

8、prove 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 Service Division. WARNING:Static discharges can destroy expensive com

9、ponents. 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. WARNI

10、NG: 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

11、cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, 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 so

12、lder/flux vapor! 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 KINGDOM Connecting the Plug and Cord WARNING:THIS APPARATUS MUST BE EARTHED IMPORTANT.The wires in this mains lead are

13、 coloured in accordance with the following code: GREEN-AND-YELLOW:EARTH BLUE:NEUTRAL BROWN:LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured GREEN a

14、nd YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth 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

15、 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/MW12C 3 ISPECIFICATIONS Electrical Specifications General Specifications MW12CX/MW12C 4 Analog Input Specifications Analog Output Specifications Digital Input/Output Sp

16、ecifications MW12CX/MW12C 5 総合仕様 電気的特性 一般仕様 MW12CX/MW12C 6 入力仕様 出力仕様 入出力仕様 MW12CX/MW12C 7 I DIMENSIONS （寸法図） 346.2 433.9 86.1 436.6 79.6 2 Unit: mm 単位：mm MW12CX MW12CX/MW12C 8 I 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 Inpu

17、t 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 Control PEAK Indicator Equalizer (HIGH, MID, and LOW) AUX (AUX1) Control AUX PRE Switch EFFECT (AUX2) Controls PAN Control (1 to 4) PAN/BAL Control (5/6 and 7/8) BAL

18、 Control (9/10 and 11/12) ON Switch PFL (Pre-Fader Listen) Switch REC Switch ST Switch Channel Fader 1 2 3 4 5 6 7 8 9 0 A B C D E F G H I 1 2 3 4 5 6 7 8 9 0 A B C D E F G H I MIC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 （） COMP PEAK E

19、Q （：HIGH、MID、LOW） AUX （AUX1） AUX PRE EFFECT （AUX2） PAN （CH14） PAN/BAL （CH5/6、7/8） BAL （CH9/10、11/12） ON PFL REC ST MW12CX 1 2 5 6 7 8 9 0 A C B D E F H G I 00 I H G E F A C D 9 B 6 7 1 33 4 I H G F E D B C A Channels 1 to 4 (Monaural) 14 （） Channels 5/6 and 7/8 (Stereo) 5/6、7/8 （） Channels 9/10 and

20、11/12 (Stereo) 9/10、11/12 （） MW12CX/MW12C 9 Master Control Section （部） 1 2 3 4 5 6 7 8 9 0 A B C D E F G H 2TR IN Jacks REC OUT 1 (L, R) Jacks REC OUT 2 (L, R) Jacks RETURN L (MONO), R Jacks SEND Jacks AUX (AUX1) EFFECT (AUX2) STEREO OUT (L, R) Jacks XLR jacks LINE jacks MONITOR OUT Jacks PHONES Jac

21、k PHANTOM +48 V Switch RETURN AUX (AUX1) Control STEREO Control Master SEND Master AUX (AUX1) Control Master EFFECT (AUX2) Control POWER Indicator Level Meter MONITOR/PHONES MONITOR Switch MONITOR Control PHONES Control 2TR IN/USB 2TR IN/USB Switch 2TR IN/USB control REC OUT Fader ST Switch STEREO O

22、UT Master Fader 1 2 3 4 5 6 7 8 9 0 A B C D E F G H 2TR 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 V RETURN AUX （AUX1） STEREO SEND AUX （AUX1） EFFECT （AUX2） POWER MONITOR/PHONES 信号

23、切替 MONITOR PHONES 2TR IN/USB 出力先切替 2TR IN/USB REC OUT ST STEREO OUT F G B H C 0 9 A D E 6 8 1 4 2 7 35 MW12CX MW12CX/MW12C 10 Digital Effects Section （部） *Only the MW12CX has digital effects. （機能MW12CX 内蔵。 ） FOOT SWITCH Jack PROGRAM Dial PARAMETER Control AUX Control ON Switch PFL Switch EFFECT RTN

24、Fader 1 2 3 4 5 6 7 FOOT SWITCH端子 PROGRAM選択 PARAMETER AUX ON PFL EFFECT RTN 1 2 3 4 5 6 7 Rear Input/Output Section （入出力部） POWER Switch AC ADAPTOR IN Connector USB Connector 1 2 3 電源 AC ADAPTOR IN端子 USB端子 1 2 3 MW12CX 4 3 5 7 2 1 6 312 MW12CX/MW12C 11 Connector Polarities 端子接続極性 MW12CX/MW12C 12 I CI

25、RCUIT BOARD LAYOUT （） Rear （） Front （） MIX12UX MIX12U (MW12CX) (MW12C) JK12UX JK12U (MW12CX) (MW12C) DSP2 (MW12CX only) PS12X PS12 (MW12CX) (MW12C) USB USB (MW12CX) (MW12C) MW12CX/MW12C 13 I WIRING DIAGRAM （基板結線図） Remarks 備考 9P-290 7P-180 5P-180 No.Part No. Assembly Name 線材名 Connection 接続 1 2 3 WJ91

26、4800 WH499400 WH499500 JK12-CN10 USB-CN101 JK12-CN9 PS-CN02 MIX12-CN9 PS-CN03 Connector Assembly Connector Assembly Connector Assembly USBMW12C束線 PS124C束線 PH束線 Location 25 42 44(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) CN

27、3 (9P) CN4 (9P) CN5 (9P) CN6 (9P) CN7 (3P) CN8 (9P) CN1 (9P) CN2 (9P) CN3 (9P) CNM02 (20P) CN10 (20P) CN9 (5P) 23 PS12X PS12 (MW12CX)(MW12CX) (MW12C)USB(MW12C) MIX12UX MIX12U (MW12CX) (MW12C) JK12UX JK12U (MW12CX) (MW12C) DSP2 USB (MW12CX only) 1 MW12CX/MW12C 14 I MW12CX OVERALL ASSEMBLY WIRING （MW1

28、2CX 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 case assembly. （Ass yPS12X取付後、下記表/図従配線。） CN02CN03 WH499400 Connector assembly PS124C WH499500 Connector assembly PS124CX

29、WH905200 PS12X circuit board WH499400 WH499500 Connector assembly PS124C Connector assembly PS124CX CN02 CN03 PS12X circuit board MW12CX WH905200 Parts Wiring point (Location/Circuit board) 2.Processing Method of Connector Assembly USBMW12C （USBMW12C束線処理） Note) Connect the connector assembly USBMW12

30、C to the USB circuit board beforehand. （事前USBMW12C束線USB接続 。） USB WG644500 WJ914800 Connector assembly USBMW12C MW12CX/MW12C 15 3.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) P

31、ass the connector assembly USBMW12C through the incision part of the JK12UX circuit board as shown in the picture below. （下写真USBMW12C束線JK12UX切欠通。） MW12CX JK12UX WJ540200 WJ914800 Connector assembly USBMW12C Note) Connect the connector assembly USBMW12C to CN10 of the JK12UX circuit board, and fix it

32、 with style pin K2 as shown in the picture below. （下写真USBMW12C束線JK12UXCN10接続、K2固定。） JK12UX WJ540200 WJ914800 Connector assembly USBMW12C K2 CN10 MW12CX/MW12C 16 2.Install the MIX12UX circuit board to the bottom case assembly. （MIX12UXAss y取付。） Note) Put out the two connector assemblies PS124C and PS

33、124CX through CN6 and CN8 as shown in the picture below. （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.Fi

34、x 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。） WH499400 WH499500 Connector assembly PS124C Connector assembly PS124CX CN9 CN9 JK12UX circ

35、uit board MIX12UX circuit board WJ540200 WJ540300 Parts Wiring 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。） JK12UX WJ540200 MIX12UX WJ540300 K1 K1 CN6 CN8 CN7 CN7 CN9 CN9 WH499400

36、 Connector assembly PS124C WH499500 Connector assembly PS124CX MW12CX MW12CX/MW12C 17 6.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 directio

37、n 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 or less. （折曲後、線、MIX12UX面15 mm以下上押。） CN1CN2CN3 CN4CN

38、5CN6CN7CN8 JK12UX WJ540200 MIX12UX WJ540300 JK12UX WJ540200 MIX12UX WJ540300 b a c 15 mm MW12CX MW12CX/MW12C 18 MW12CX 8.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 MIX12

39、UX circuit boards component side become 15 mm or 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。） JK12UX WJ540200 MIX12UX WJ540

40、300 15 mm Bend the Jumper-wires in the shape of M character. C229 Incline the electrolytic capacitor (C229). MW12CX/MW12C 19 1.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 case assemb

41、ly. （Ass yPS12取付後、下記表/図従配線。） WH499400Connector assembly PS124CCN02PS12 circuit boardWH903200 Parts Wiring point (Location/Circuit board) MW12C CN02 WH499400 Connector assembly PS124C WH903200 PS12 circuit board I MW12C OVERALL ASSEMBLY WIRING （MW12C 総組立配線図） 2.Processing Method of Connector Assembly

42、USBMW12C （USBMW12C束線処理） Note) Connect the connector assembly USBMW12C to the USB circuit board beforehand. （事前USBMW12C束線USB接続 。） USB WG644500 WJ914800 Connector assembly USBMW12C MW12CX/MW12C 20 MW12C 3.The Wiring of the JK12U Circuit Board and MIX12U Circuit Board （JK12UMIX12U配線） 1.Install the JK12

43、U 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 in the 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 f

44、ix it with style pin K2 as shown in the picture below. （下写真USBMW12C束線JK12UCN10接続、K2固定。） JK12U WH109500 WJ914800 Connector assembly USBMW12C JK12U WH109500 WJ914800 Connector assembly USBMW12C K2 CN10 MW12CX/MW12C 21 MW12C WH499400Connector assembly PS124CCN9JK12U circuit boardWH109500 Parts Wiring p

45、oint (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

46、。） 4.Fix the connector assembly PS124C with style pin K1 on the JK12U circuit board. （線材PS124CJK12UK1固定。） JK12U WH109500 MIX12U WH109600 K1 CN6 CN8 CN7 CN9 WH499400 Connector assembly PS124C MW12CX/MW12C 22 5.Connect each CN1-CN8 on the JK12U circuit board and MIX12U circuit board using jumper wire.

47、 （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 or less. （折曲後、線、MIX12U面15 mm以下上押。） CN1CN2CN3 CN4CN5CN6CN7CN8 JK12U WH109500 MIX12U WH109600 JK12U WH109500 MIX12U WH109600 b a c 15 mm MW12C MW12CX/MW12C 23 MW12C 7.Bend the jumper-wires of CN3-CN8. （CN3-CN8線折