Yamaha-MG124C-mix-sm 电路图 维修手册.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 MG124CX OVERALL ASSEMBLY WIRING （MG124CX 総組立配線図） .14 MG124C OVERALL ASSEMBLY WIRING （MG124C 総組立配線図）.18 MG124CX DISASSEMBLY PROCEDURES （MG124CX 分解手順） .22 MG124C DISASS

2、EMBLY PROCEDURES （MG124C 分解手順）.25 LSI PIN DESCRIPTION （LSI端子機能表） .28 IC BLOCK DIAGRAM （IC図） .30 CIRCUIT BOARDS （基板図） .33 INSPECTIONS （検査） .43/50 PARTS LIST IC & DIODE FIGURES （外形図） BLOCK & LEVEL DIAGRAM （&） CIRCUIT DIAGRAM （回路図） I CONTENTS （目次） PA011847 Copyright (c) Yamaha Corporation. All rights r

3、eserved. 07.01 HAMAMATSU, JAPAN （ECF：無塩素系漂白）使用。 This document is printed on chlorine free (ECF) paper. MG124CX: 200702-49140 MG124C: 200702-38640 MG124CXMG124C RadioFans.CN 收音机爱 好者资料库 MG124CX/MG124C 2 IWARNING Components having special characteristics are marked and must be replaced with parts havin

4、g specification equal 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 Y

5、amaha Products, 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, destruc- tion of expensive components and failure of the product to perf

6、orm as specified. 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 authorizat

7、ion, certification, 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 contin

8、ually 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 Service Division. WARNING:Static discharges can d

9、estroy expensive components. 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 powe

10、r 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

11、 other entities) to 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

12、or expose eyes to solder/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

13、 this mains lead are 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

14、 is coloured GREEN and 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 BLAC

15、K. 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 MG124CX/MG124C 3 ISPECIFICATIONS Electrical Specifications General Specifications RadioFans.CN 收音机爱 好者资料库 MG124CX/MG124C 4 Input Specifications Output Spec

16、ifications MG124CX/MG124C 5 総合仕様 電気的特性 一般仕様 MG124CX/MG124C 6 入力仕様 出力仕様 MG124CX/MG124C 7 I DIMENSIONS （寸法図） Unit: mm 単位：mm 346.2 436.6 86.1 79.6 2 433.9 MG124CX/MG124C 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 Input Jacks

17、 (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 Contro

18、l (9/10 and 11/12) ON Switch PFL (Pre-Fader Listen) Switch 1-2 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 （CH 1 4、5/6、7/8） LINE入力端子 （CH 1 4） LINE入力端子 （CH 5/6 11/12） LINE入力端子 （CH 9/10、11/12） INSERT端子 （CH 1 4） GAIN 80 （） COMP PEAK

19、 EQ （：HIGH、MID、LOW） AUX （AUX1） AUX PRE EFFECT （AUX2） PAN （CH 1 4） PAN/BAL （CH 5/6、7/8） BAL （CH 9/10、11/12） ON PFL 1-2 ST ONONON 1 2 5 6 8 7 6 7 99 0 A B C D A B C D A B C D E F G H I E F G H E F G H II 1 33 4 MG124CX 14 （） Channels 1 to 4 (Monaural) 5/6、7/8 （） Channels 5/6 and 7/8 (Stereo) Channels

20、9/10 and 11/12 (Stereo) 9/10、11/12 （） 00 MG124CX/MG124C 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 (L, R) Jacks RETURN L (MONO), R Jacks SEND Jacks AUX (AUX1) EFFECT (AUX2) STEREO OUT (L, R) Jacks XLR Jacks LINE Jacks GROUP OUT (1, 2) Jacks MONITOR OUT Jack

21、s PHONES Jack 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 2TR IN 2TR IN Switch 2TR IN Control GROUP 1-2 Fader ST Switch STEREO OUT Master Fad

22、er 1 2 3 4 5 6 7 8 9 0 A B C D E F G H 2TR IN端子 REC OUT （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 GROUP OUT （1、2） 端子 MONITOR OUT端子 PHONES端子 PHANTOM +48 V RETURN AUX （AUX1） STEREO SEND AUX （AUX1） EFFECT （AUX2） POWER MONITOR/PHONES 信号切替 2TR IN 2TR I

23、N切替 2TR IN GROUP 1-2 ST STEREO OUT 1 3 4 5 7 8 6 9 0 A D E G FH B 2 C MG124CX MG124CX/MG124C 10 Digital Effects Section （部） *Only the MG124CX has digital effects. （機能MG124CX 内蔵。 ） FOOT SWITCH Jack PROGRAM Dial PARAMETER Control AUX Control ON Switch PFL Switch EFFECT RTN Fader 1 2 3 4 5 6 7 FOOT SWI

24、TCH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 1 2 電源 AC ADAPTOR IN端子 1 2 ON 1 2 3 4 5 6 7 MG124CX 12 MG124CX/MG124C 11 Connector Polarities 端子接続極性 MG124CX/MG124C 12 I CIRCUIT BOARD LAYOUT （） Rear （） Front （） MIX12X

25、 MIX12 (MG124CX) (MG124C) JACK12X JACK12 (MG124CX) (MG124C) DSP (MG124CX only) PS12X PS12 (MG124CX) (MG124C) MG124CX/MG124C 13 I WIRING DIAGRAM （基板結線図） Remarks 備考 7P-180 5P-180 No.Part No. Assembly Name 線材名 Connection 接続 1 2 WH499400 WH499500 JACK12-CN9 PS12-CN02 MIX12-CN9 PS12-CN03 Connector Assemb

26、ly Connector Assembly PS124C束線 PS124CX束線 Location 42 44 PS12X PS12 (MG124CX) (MG124C) DSP (MG124CX only) MIX12X MIX12 (MG124CX) (MG124C) JACK12X JACK12 (MG124CX) (MG124C) CN02 (7P) CN9 (7P) CN9 (5P) CN8 (9P) CN6 (9P) CNM02 (20P) CN10 (20P) CN4 (9P) CN1 (9P) CN3 (9P) CN2 (9P) CN5 (9P) 12 CN03 (5P) CN

27、8 (9P) CN1 (9P) CN2 (9P) CN3 (9P) CN4 (9P) CN5 (9P) CN6 (9P) (MG124CX) MG124CX/MG124C 14 I MG124CX OVERALL ASSEMBLY WIRING （MG124CX 総組立配線図） 1.The Wiring of the PS12X Circuit Board （PS12X配線） Connect the wires according below after attach PS12X circuit board with bottom case assembly. （Ass yPS12X取付後、下

28、記表/図従配線。） CN02CN03 WH499400 Connector assembly PS124C WH499500 Connector assembly PS124CX WH905200 PS12X circuit board WH499400 WH499500 Connector assembly PS124C Connector assembly PS124CX CN02 CN03 PS12X circuit board MG124CX WH905200 Parts Wiring point (Location/Circuit board) MG124CX/MG124C 15 J

29、ACK12X WH109200 MIX12X WH109300 K1 K1 CN6CN8 CN9 CN9 WH499400 Connector assembly PS124C WH499500 Connector assembly PS124CX 2.The Wiring of the JACK12X Circuit Board and MIX12X Circuit Board （JACK12XMIX12X配線） 1.Attach JACK12X circuit board with bottom case assembly. （JACK12XAss y取付。） 2.Attach MIX12X

30、 circuit board with bottom case assembly. （MIX12XAss y取付。） Note) Put out two connector assembly PS124C and PS124CX through CN6 and CN8 refer to the following picture. （下写真PS12X接続線材JACK12XMIX12X間、CN6、CN8間出 。） Note) Take care not to pinch the two connector assembly between the shield DSP and the JACK1

31、2X circuit board. （PS12X接続線材2種DSPJACK12X注意。） 3.Connect the wires according below. （下表従配線。） MG124CX Note) Take care not to pinch the two connector assembly between the shield DSP and the JACK12X circuit board. （PS12X接続線材DSPJACK12X注意。） 4.Fix connector assembly PS124C with style pin K1 on JACK12X circu

32、it board. （線材PS124CJACK12XK1固定。） 5.Fix connector assembly PS124CX with style pin K1 on MIX12X circuit board. （線材PS124CXMIX12XK1固定。） WH499400 WH499500 Connector assembly PS124C Connector assembly PS124CX CN9 CN9 JACK12X circuit board MIX12X circuit board WH109200 WH109300 Parts Wiring point (Location

33、/Circuit board) MG124CX/MG124C 16 CN1CN2CN3 CN4CN5CN6CN8 JACK12X WH109200 MIX12X WH109300 JACK12X WH109200 MIX12X WH109300 b a c 15 mm 6.Connect each CN1-CN6 and CN8 on JACK12X circuit board and MIX12X circuit board using jumper wire. （JACK12XMIX12X上CN1-CN6CN8接続。） MG124CX 7.Bend the jumper-wires of

34、CN1, CN2. （CN1、CN2線折曲。） a. Jumper-wires are bent to the direction of the MIX12X circuit board. （線MIX12X方向折曲。） b. Jumper-wires are bent back to the direction of the JACK12X circuit board again. （線再度JACK12X方向折返。） c. After bend, jumper-wires are pushed to become from the MIX12X circuit board side to 15

35、 mm or less. （折曲後、線、MIX12X面15 mm以下上押。） MG124CX/MG124C 17 MG124CX 8.Bend the jumper-wires of CN3-CN6 and CN8. （CN3-CN6、CN8線折曲。） a. Jumper-wires are bent to shape of the “M” character. （線 “M” 字形状折曲。） b. After bend, Jumper-wires are processed to become from the MIX12X circuit board side to 15 mm or les

36、s. （折曲後、MIX12X面15 mm以下線処理。） Notes) Jumper-wire CN3 must not come in contact with the electrolytic capacitor C229. （線CN3C229接触。） Incline the electrolytic capacitor C229 before bending Jumper-wire CN3. （線CN3折曲前、C229傾。） JACK12X WH109200 MIX12X WH109300 15 mm Jumper-wires are bent to shape of the M char

37、acter. C229 Incline the electrolytic capacitor (C229). MG124CX/MG124C 18 1.The Wiring of the PS12 Circuit Board （PS12配線） Connect the wires according below after attach PS12 circuit board with bottom case assembly. （Ass yPS12取付後、下記表/図従配線。） WH499400Connector assembly PS124CCN02PS12 circuit boardWH9032

38、00 Parts Wiring point (Location/Circuit board) MG124C WH903200 PS12 circuit board CN02 WH499400 Connector assembly PS124C I MG124C OVERALL ASSEMBLY WIRING （MG124C 総組立配線図） MG124CX/MG124C 19 2.The Wiring of the JACK12 Circuit Board and MIX12 Circuit Board （JACK12MIX12配線） 1.Attach JACK12 circuit board

39、with bottom case assembly. （JACK12Ass y取付。） 2.Attach MIX12 circuit board with bottom case assembly. （MIX12Ass y取付。） Note) Put out two connector assembly PS124C through CN6 and CN8 refer to the following picture. （下写真PS12接続線材JACK12MIX12間、CN6、CN8間出 。） 3.Connect the wires according below. （下表従配線。） 4.Fi

40、x connector assembly PS124C with style pin K1 on JACK12 circuit board. （線材PS124CJACK12K1固定。） MG124C JACK12 WH108900 MIX12 WH109000 CN6 K1 CN9 CN8 WH499400 Connector assembly PS124C WH499400Connector assembly PS124CCN9JACK12 circuit boardWH108900 Parts Wiring point (Location/Circuit board) MG124CX/MG

41、124C 20 5.Connect each CN1-CN6 and CN8 on JACK12 circuit board and MIX12 circuit board using jumper wire. （JACK12MIX12上CN1-CN6CN8接続。） 6.Bend the jumper-wires of CN1, CN2. （CN1、CN2線折曲。） a. Jumper-wires are bent to the direction of the MIX12 circuit board. （線MIX12方向折曲。） b. Jumper-wires are bent back t

42、o the direction of the JACK12 circuit board again. （線再度JACK12方向折返。） c. After bend, jumper-wires are pushed to become from the MIX12 circuit board side to 15 mm or less. （折曲後、線、MIX12面15 mm以下上押。） CN1CN2CN3 CN4CN5CN6CN8 JACK12 WH108900 MIX12 WH109000 JACK12 WH108900 MIX12 WH109000 b a c 15 mm MG124C MG

43、124CX/MG124C 21 7.Bend the jumper-wires of CN3-CN6 and CN8. （CN3-CN6、CN8線折曲。） a. Jumper-wires are bent to shape of the “M” character. （線 “M” 字形状折曲。） b. After bend, Jumper-wires are processed to become from the MIX12 circuit board side to 15 mm or less. （折曲後、MIX12面15 mm以下線処理。） Notes) Jumper-wire CN3

44、must not come in contact with the electrolytic capacitor C229. （線CN3C229接触。） Incline the electrolytic capacitor C229 before bending Jumper-wire CN3. （線CN3折曲前、C229傾。） JACK12 WH108900 MIX12 WH109000 15 mm Jumper-wires are bent to shape of the M character. C229 Incline the electrolytic capacitor (C229)

45、. MG124C MG124CX/MG124C 22 I MG124CX DISASSEMBLY PROCEDURES （MG124CX 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 and knob select marked 300. (Fig. 1) 1-2Remove the twenty-three (23) screws marked 180

46、, two (2) screws marked 183A, 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 case assembly, tighten the screws in the order shown in Fig. 1. (Fig. 1) 1. （所要時間：10

47、分） 1-1240 FADER8個、 250 FADER2個、 260 FADER、 300 SELECT外 。 （Fig. 1） 1-2180 23本、 183A 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) BBIND 183A:Bind Head Tapping Screw-B 3x8 MFZN2B3 (WE774400) BBIND 185:Bind Head Screw 3x6 MFZN2B3 (WE878300) 小BIND 240:Fader Knob Black/L-Gray (V9664900) FADER 250:Fader Knob Red/D-Gray (V9665000) FADER 260:Fader Knob White/Red (V9665100) FADER 300:Knob Black (WD233000) SELECT色上 (Fig. 1) M9 Hexagon nut and washer （M9六角、） M9 Hexagon nut and washer （M9六角、） 240250260 3