Yamaha MG10/2 Service Manual

Other manuals for MG10/2: Owner's Manual, Service Manual

Summary of MG10/2

  • Page 1

    Mg10/2 1 service manual pa 011679 200306-14800 copyright (c) yamaha corporation. All rights reserved. Pdf-k135 ’03.04 hamamatsu, japan contents specifications ................................................ 3/5 dimensions ............................................................ 7 panel layout ....

  • Page 2: Warning

    Mg10/2 2 impor tant 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 already known and under- stood by the users, and hav...

  • Page 3: Specifications

    Mg10/2 3 specifications general specifications where 0 dbu = 0.775 v and 0 dbv = 1 v 1 measured with 12.7 khz, –6 db/oct. Low pass filter (equivalent to 20 khz, – ∞ filter). (ch mic input to st, aux, effect send) 2 turning pan/bal to left or right. 3 shelving turnover/rolloff frequency: 3 db before ...

  • Page 4

    Mg10/2 4 input specifications where 0 dbu = 0.775 v and 0 dbv= 1v * input sensitivity: the lowest level that will produce the nominal output level when the unit is set to maximum gain. Output specifications where 0 dbu = 0.775 v and 0 dbv= 1 v input connector gain input impedance appropriate impedan...

  • Page 5: 総合仕様

    Mg10/2 5 総合仕様 一般仕様 * 0 dbu = 0.775 v 、 0 dbv = 1 v とする *1 rs = 150 ohms @12.7 khz 、 –6 db/oct. のローパスフィルターにて測定 ( @20 khz 、 – ∞ db/oct. フィルターに相当) ( ch mic input to st 、 aux 、 effect send ) *2 pan/bal 左か右へ回す *3 シェルビングタイプのターンオーバー / ロールオフ周波数:最大可変幅に対し 3 db 下がったポイント 周波数特性( st out ) 20 hz 〜 20 khz +1 db, –3...

  • Page 6

    Mg10/2 6 入力仕様 * 0 dbu=0.775 v 、 0 dbv=1 v とする *1 入力感度:最大ゲイン測定時に定格出力が得られる最小レベル 出力仕様 * 0 dbu=0.775 v 、 0 dbv=1 v とする 入力端子名称 ゲイン 入力イン ピーダンス 適合インピーダンス 感度 *1 規定レベル 最大ノンク リップレベル 端子仕様 mic input (ch1-2 ) –60 3 k Ω 50 〜 600 Ω マイク –72 dbu ( 0.195 mv ) –60 dbu ( 0.775 mv ) –40 dbu ( 7.75 mv ) xlr-3-31 タイプ (バラン...

  • Page 7: Dimensions

    Mg10/2 7 dimensions units: mm (単位) (寸法図) 251 290.5 65.

  • Page 8: Panel Layout

    Mg10/2 8 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7 channel control section [gain] control [peak] indicator [ 80 ] switch (high pass filter) equalizer ([high], [mid], and [low]) [aux] controls [pan] control (chs 1 and 2) [pan/bal] control (chs 3/4 and 5/6) [bal] control (chs 7/8 and 9/10) channel fad...

  • Page 9

    Mg10/2 9 1 2 3 4 5 6 7 8 9 10 channel input jacks (chs 1, 2, 3/4, 5/6) [insert i/o] jacks (chs 1, 2) channel input jacks (chs 7/8, 9/10) [2tr in] jacks [rec out] (l, r) jacks [st out] (l, r) jacks [c-r out] jacks [send] jacks [return] l (mono), r jacks [phones] jack 1 2 3 4 5 6 7 8 9 10 チャンネル input ...

  • Page 10

    Mg10/2 10 connector polarities * these jacks will also accept connection to monaural phone plugs. If you use monaural plugs, the connection will be unbalanced. Mic input pin 1: ground pin 2: hot (+) pin 3: cold (–) line input (monaural channels), st out, c-r out, aux1, aux2* tip: hot (+) ring: cold ...

  • Page 11

    Mg10/2 11 circuit board layout & wiring main (ケーブルの色) power switch and ac connector wiring (電源スイッチとacコネクタの結線) (v975620) (connector assembly 2p brown, red) need twist of one rotation. V9737300 (main circuit board) v998150 (connector assembly 3p brown, red, black) cable colors n eed twist of one rotat...

  • Page 12: Disassembly Procedure

    Mg10/2 12 disassembly procedure [250]: hex. Socket tapping screw-p 3x25 mfznbl (v3289800) [260]: bind head tapping screw-b 3.0x8 mfzn2bl (ep600190) [270]: bind head tapping screw-s 3.0x6 mfzn2bl (ep630210) [280]: bonding tapping screw-b 3.0x8 mfzn2bl (vn413300) 1. ボトムケース(所要時間:約 1 分) 1-1 [250]のネジ 5 本...

  • Page 13

    Mg10/2 13 2. サポート ac(所要時間:約 2 分) 2-1 ボトムケースを外します。 (1 項参照) 2-2 [270]のネジ 1 本を外し、サポート ac を外します。 (図 1、写真 1) 3. Main シート(所要時間:約 8 分) 3-1 ボトムケースを外します。 (1 項参照) 3-2 サポート ac を外します。 (2 項参照) 3-3 [280]のネジ 10 本と特殊六角ナット 21 個、 [a]のノ ブ(level) 8個を外し、mainシートを外します。 (図 1) ※mainシート上のノブ、ボタン、ウィンドウmeter は、シートの構成部品ではありません。m...

  • Page 14: Ic Block Diagram

    Mg10/2 14 ic block diagram njm4558m (t1) (ig103520) main: ic103, 304, 404, 503, 603 dual operational amplifier njm4556al main: ic806 dual operational amplifier (xp844a00) lb1412m (xt547a00) main: ic803, 805 led driver njm2068md-t1 (xj553a00) main: ic202, 302, 303, 402, 403, 501, 502, 601, 602, 701, ...

  • Page 15: Circuit Board

    Mg10/2 15 main circuit board circuit board note: see parts list for details of circuit board component parts. 注:シートの部品詳細はパーツリストをご参照ください。 component side mic 1 2 1 2 1 2 7 l 8 r 9 l 10 r 3/4 5/6 3 l (mono) 5 l (mono) 4 r 6 r l (mono) r aux1 (pre) aux2 phones send return 7 l 8 r 9 l 10 r l r l st out c...

  • Page 16

    Mg10/2 16 pattern side main circuit board (パターン側).

  • Page 17: Inspections

    17 mg10/2 inspections 1. Scope this inspection specification is applied to the mixer mg10/2. 2. Power supply ac adaptor shall be used. V981040(h:230v 50hz) or v981030(u:120v 60hz), v981220(b:230v 50hz), v981680(k:220v 60hz), v986200(a:240v 50hz) 3. Power indicator inspection power led shall light wh...

  • Page 18

    Mg10/2 18 input input level gain insert out rec out l rec out r 1-4/8 mic 1, 2 -72 max -12 ± 2 – – ch insert in 1 0 unspecified – +4.2 ± 2 +4.2 ± 2 ch insert in 2 0 unspecified – +4.2 ± 2 – table 4.2.2 [dbu] input input ch input level gain st l out st r out aux1 aux2 mic -72 max 0 ± 2 *1 0 ± 2 *1 +1...

  • Page 19

    19 mg10/2 4.5 channel equalizer characteristics in the state checked in 4.2 above, check the output level obtained at st l out in the case of ch input and st ch input l and at st r out in the case of st ch input r when lo, hi and mid of input are moved respectively. Its level of each frequency shall...

  • Page 20

    Mg10/2 20 4.10 maximum output in the state 4.9, the distortion factor shall be less than 1% when the output level is +20dbu at st l out, st r out, aux1 out, aux2 out and c-r out. The distortion factor shall be less than 1% when the output level is +7.5dbu at phones (l/r). In measuring the st l out, ...

  • Page 21: 検査

    21 mg10/2 1.適用範囲 ミキサー mg10/2 について規定します。 2.電源 ac アダプターを使用します。 v981020 (j:100v 50hz) 3.パワーインジケーターの検査 電源投入時、power indicator が点灯することを確認します。 4. ミキサー部の検査 4.1 準備 各出力端子の負荷抵抗は下記の通りです。 ・phones(l,r): 40 Ω ・その他出力: 10k Ω 特に指定の無い場合、ツマミ類は以下のように設定してください。 ・ch (1-2) input h・p・f switch off gain trim max(-60dbu) hi, mi...

  • Page 22

    Mg10/2 22 4.3 周波数特性 表 4.2.1 〜 6 の q 〜!2 のついた系統において、印加信号周波数を 20hz・20khz とした時、各出力端子の出力レベルは 1khz を基準として、+1.0db,-2.5db の範囲内にあることを確認します。 ※ gain vr max の時の 20hz のみ、+1.0db,-4.5db とします。 ※ q の系統は、ch.1 のみ全部の out で確認し、ch.2 以降は st l out のみ確認します。 ※ r の系統は、st l out, st r out のみ確認します。 4.4 hpf 表 4.2.1、表 4.2.2 の状態で入...

  • Page 23

    23 mg10/2 4.5 チャンネル eq 変化特性 4.2 の状態で、input の lo,mid,hi をそれぞれ動かした時、ch input 及び st ch input l は st l out で、st ch input r は st r out で得られる各周波数における出力レベルは、eq gain control センタークリック位置の出力レベル を基準として[表 4.5.1]の範囲内であることを確認します。 指定周波数において範囲内の出力レベルが得られない場合は、印加周波数を指定周波数の± 20% の範囲で変化させ、 [表 4.5.1]の変化幅が得られることを確認します。 4...

  • Page 24

    Mg10/2 24 4.10 最大出力 4.9 の状態で st l out,st r out,aux1 out,aux2 out,c-r out に +20dbu 歪率 1% 以下の出力が得られることを確認 します。 phones(l,r)に +7.5dbu 歪率 1% 以下の出力が得られることを確認します。 st l out,st r out 測定時は、pan または bal control をそれぞれ l,r に回しきってください。 c-r out, phone 測定時は、c-r/phone control を max にしてください。 4.11 入力換算雑音 4.1 の状態で、ch in...

  • Page 25: Parts List

    Parts list contents overall assembly .............................................. 2 electrical parts ........................................ 4-17 warning components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. ...

  • Page 26: Overall Assembly

    Mg10/2 2 overall assembly 70 90 90 100 110 150 50 170 10 160 180 100 130 210 250 250 280 280 130 140 120 30 35 20 270 260 80 190 60 290 200 290 40 300 250 90 meter reflector (リフレクターmeter) (総組立).

  • Page 27

    Mg10/2 3 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * * * * * * * * * * * overall assembly mg10/2 (v981930) 10 circuit board main 20 connector 3p scmi405mos3n000 ac adaptor in 03 30 power switch sddje3-a-2 u c s on/standby 07 35 shrink tube black 600v m5.0 40 conn...

  • Page 28: Electrical Parts

    Mg10/2 4 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * electrical parts electrical parts mg10/2 circuit board main (x3234b0) circuit board main (x3234b0) 10 heat sink (wa03810) 60 bind head tapping screw-b 3.0x8 mfzn2bl 7 01 70 meter reflector white 80 led spacer bla...

  • Page 29

    Mg10/2 5 : new parts ref no. Part no. Description remarks qty rank rank: japan only c211 ceramic capacitor (chip) 100p 50v k 0603 c212 ceramic capacitor (chip) 33p 50v k 0603 c213 electrolytic cap. 10.00 25.0v c214 mylar capacitor 0.082 50v j 01 c215 mylar capacitor 0.082 50v j 01 c216 ceramic capac...

  • Page 30

    Mg10/2 6 : new parts ref no. Part no. Description remarks qty rank rank: japan only c347 mylar capacitor 0.047 50v j 01 c348 ceramic capacitor (chip) 100p 50v k 0603 c349 ceramic capacitor (chip) 100p 50v k 0603 c350 ceramic capacitor (chip) 47p 50v k 0603 c351 ceramic capacitor (chip) 47p 50v k 060...

  • Page 31

    Mg10/2 7 : new parts ref no. Part no. Description remarks qty rank rank: japan only c503 ceramic capacitor (chip) 100p 50v k 0603 -506 ceramic capacitor (chip) 100p 50v k 0603 c507 ceramic capacitor (chip) 47p 50v k 0603 c508 ceramic capacitor (chip) 47p 50v k 0603 c509 electrolytic cap. 10.00 25.0v...

  • Page 32

    Mg10/2 8 : new parts ref no. Part no. Description remarks qty rank rank: japan only c705 ceramic capacitor (chip) 100p 50v k 0603 -708 ceramic capacitor (chip) 100p 50v k 0603 c709 ceramic capacitor (chip) 220p 50v k 0603 -712 ceramic capacitor (chip) 220p 50v k 0603 c713 ceramic capacitor (chip) 22...

  • Page 33

    Mg10/2 9 : new parts ref no. Part no. Description remarks qty rank rank: japan only d08 diode d1ns4 01 d09 diode 1n4004 d301 diode 1ss355 te-17 01 -303 diode 1ss355 te-17 01 d401 diode 1ss355 te-17 01 -403 diode 1ss355 te-17 01 f01 fuse holder wl-210a 2 01 f02 fuse holder wl-210a 2 01 f1 fuse sic 1a...

  • Page 34

    Mg10/2 10 : new parts ref no. Part no. Description remarks qty rank rank: japan only ld301 led red hfr203pj-3-00 peak 3/4 ld401 led red hfr203pj-3-00 peak 5/6 ld801 led red hfr203tp-1-00 l peak ld802 led yellow hfy103tp-1-00 l +5 ld803 led yellow hfy103tp-1-00 l +3 ld804 led yellow hfy103tp-1-00 l +...

  • Page 35

    Mg10/2 11 : new parts ref no. Part no. Description remarks qty rank rank: japan only r110 carbon resistor (chip) 10 0.1 j r111 metal film resistor (chip) 47k 1/16 d r112 metal film resistor (chip) 47k 1/16 d r113 carbon resistor (chip) 10 0.1 j r114 metal film resistor (chip) 2.2k 1/16 d r115 metal ...

  • Page 36

    Mg10/2 12 : new parts ref no. Part no. Description remarks qty rank rank: japan only r220 metal film resistor (chip) 3.9k 1/16 d r221 metal film resistor (chip) 33k 1/16 d r222 carbon resistor (chip) 10 0.1 j r223 metal film resistor (chip) 33k 1/16 d r224 carbon resistor (chip) 220k 0.1 j r225 carb...

  • Page 37

    Mg10/2 13 : new parts ref no. Part no. Description remarks qty rank rank: japan only r334 carbon resistor (chip) 220k 0.1 j r335 carbon resistor (chip) 10k 0.1 j r336 carbon resistor (chip) 680 0.1 j r337 carbon resistor (chip) 2.7k 0.1 j r338 carbon resistor (chip) 10k 0.1 j r339 carbon resistor (c...

  • Page 38

    Mg10/2 14 : new parts ref no. Part no. Description remarks qty rank rank: japan only r432 carbon resistor (chip) 10 0.1 j r433 carbon resistor (chip) 220k 0.1 j r434 carbon resistor (chip) 220k 0.1 j r435 carbon resistor (chip) 10k 0.1 j r436 carbon resistor (chip) 680 0.1 j r437 carbon resistor (ch...

  • Page 39

    Mg10/2 15 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * * r529 carbon resistor (chip) 220 0.1 j r530 carbon resistor (chip) 220 0.1 j r531 carbon resistor (chip) 18k 0.1 j r532 carbon resistor (chip) 18k 0.1 j r533 carbon resistor (chip) 220 0.1 j r534 carbon resis...

  • Page 40

    Mg10/2 16 : new parts ref no. Part no. Description remarks qty rank rank: japan only r717 carbon resistor (chip) 8.2k 0.1 j r718 carbon resistor (chip) 36k 0.1 j r719 carbon resistor (chip) 20k 0.1 j r720 carbon resistor (chip) 20k 0.1 j r721 carbon resistor (chip) 22k 0.1 j r722 carbon resistor (ch...

  • Page 41

    Mg10/2 17 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * * * * -882 carbon resistor 1.5k 1/8 j r883 flame proof c. Resistor 10.0 1/4 j 01 r884 flame proof c. Resistor 10.0 1/4 j 01 r885 carbon resistor 2.2k 1/8 j sw101 push switch ps-22e85l hpf 1 01 sw102 push switc...

  • Page 42: Circuit Diagram

    Circuit diagram contents block diagram ...................................... 3 overall circuit diagram mixing console note: see parts list for details of circuit board component parts. Main ............................................................................ 4-7 signal name stl (信号名) (シート間コ...

  • Page 43

    1 2 3 4 5 6 a b c d e f g h mg10/2 block diagram & level diagram 3 28ca1-8826957 2 st mater jk802 vr801 ic802a (8p) ic804a (8p) ic802b (8p) ic803 (24p) led driver ic805 (24p) ic801a (8p) ic801b (8p) ic806b (8p) ic806a (8p) ic804b (8p) l l r r st out (+4dbu) rec out (-10dbu) ld801 vr802 c-r/phones jk...

  • Page 44

    A b 1 2 3 4 5 6 7 8 9 10 11 12 13 c d e f g h i j k l m n o p q 4 overall circuit diagram 1/4 (main) mg10/2 28cc1-8826958-1 3 : ceramic capacitor (セラミックコンデンサー) ( セ ) : mylar capacitor (マイラーコンデンサー) ( マ ) : metal film resistor (金属被膜抵抗) ( f ) : low leakage current electrolytic capacitor (低漏れ電流電解コンデンサー)...

  • Page 45

    1 2 3 4 5 6 7 8 9 10 11 12 13 a b c d e f g h i j k l m n o p q r s mg10/2 overall circuit diagram 2/4 (main) 28cc1-8826958-2 5 3 : ceramic capacitor (セラミックコンデンサー) ( セ ) : mylar capacitor (マイラーコンデンサー) ( マ ) main low rec out 2tr in level bal aux bal aux 2tr in return level high mid low high mid op am...

  • Page 46

    A b 1 2 3 4 5 6 7 8 9 c d e f g h i j k l 6 overall circuit diagram 3/4 (main) mg10/2 28cc1-8826958-3 3 op amp op amp op amp op amp op amp op amp op amp op amp led driver led driver : ceramic capacitor (セラミックコンデンサー) ( セ ) : mylar capacitor (マイラーコンデンサー) ( マ ) : flame proof c. Resistor (不燃化カーボン抵抗) (フ)...

  • Page 47

    1 2 3 4 5 6 a b c d e f g h i mg10/2 overall circuit diagram 4/4 (main) 28cc1-8826958-4 7 3 ac adaptor in on/standby (power) main regulator +15v regulator -15v regulator +12v regulator +5v components having special characteristics are marked and must be replaced with parts having specifications equa...