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Yamaha MG10/2 Service Manual

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

Summary of MG10/2

  • Page 1

    Service manual specifications （総合仕様）............................................... 3/5 dimensions （寸法図）........................................................... 7 panel layout （パネルレイアウト）...................................... 8 circuit board layout & wiring （ユニットレイアウト＆結線図）............................

  • Page 2: Warning

    2 mg10/2 impor tant notice this manual has been provided for the use of authorized yamaha retailers and their ser vice 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 ha...

  • Page 3: Specifications

    Mg10/2 3 frequency characteristics (st out) 20 hz-20 khz +1 db, -3 db @+4 dbu, 10 k Ω (with gain control at maximum level) total harmonic distortion (st out) 0.1 % (thd+n) @+14 dbu, 20 hz-20 khz, 10 k Ω (with gain control at maximum level) (chs 1 and 2) -128 dbu equivalent input noise (chs 1 and 2) ...

  • Page 4

    4 mg10/2 input connector gain input impedance appropriate impedance sensitivity* rated level max. Before clipping connector specifications mic input (ch 1-2) –60 3 k Ω 50–600 Ω mic –72 dbu (0.195 mv) –60 dbu (0.775 mv) –40 dbu (7.75 mv) xlr-3-31 type (balanced) –16 –28 dbu (30.9 mv) –16 dbu (123 mv)...

  • Page 5: 総合仕様

    Mg10/2 5 周波数特性 （st out） 20 hz〜20 khz +1 db、-3 db @+4 dbu （＊）、10 kΩ（gain コントロール＝最大レベル） 全高調波歪率 （st out） 0.1 %（thd+n） @+14 dbu, 20 hz〜20 khz 、10 kΩ（gain コントロール＝最大レベル） (ch1 、2) -128 dbu 入力換算ノイズ (ch1、2) -100 dbu 残留ノイズ (st out) -87 dbu (91 db s/n) st マスターコントロール＝ノミナル ハム& ノイズ *1 全チャンネルコントロール＝最小レベル -85 dbu (...

  • Page 6

    6 mg10/2 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 （バランス型） –16 –28 dbu （ 30.9 mv） –16 dbu （ 123 mv） +4 dbu （ 1.23 v） line input (ch1、 2) –34 10 kΩ 600 Ω ライン –46 dbu...

  • Page 7: Dimensions

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

  • Page 8: ■ Panel Layout

    8 mg10/2 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7 [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 fader [phantom +48 v] switc...

  • 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

    10 mg10/2 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 (–) sleeve: ground insert i/o tip: output ring: input sleeve: ground phones tip: l ring: r sleeve: ground return, line input (stereo channels) tip: ho...

  • Page 11

    Mg10/2 11 main power switch and ac connector wiring （電源スイッチとacコネクタの結線） (a). Twist wiring assy ac8 three times,and fix to a top cover. 束線ac8 を3回捻り、トップカバーに固定します。 (b). Adjust the position so that the wire is arranged within the range of the pwb print (reticulation). 線材が、基板印刷(網目)の範囲内に配置されるように位置を調整します。 (...

  • Page 12: Disassembly Procedure

    12 mg10/2 [250]: hex. Socket screw-p （pタイト6角孔付き）3x25 mfzn2b3 (wf419200) [260]: bind head tapping screw-b （bタイト＋bind）3.0x8 mfzn2b3 (we774400) [270]: bind head tapping screw-s （sタイト＋bind）3.0x6 mfzn2b3 (we877800) [280]: bonding tapping screw-b （bタイト＋bond）3.0x10 mfzn2b3 (we878000) fig .1 (図1) [260] [250...

  • Page 13

    Mg10/2 13 ac support （サポートac） claw（ツメ） claw（ツメ） ac connector （acコネクター） hexagonal nut and flat washer （特殊六角ナット と平ワッシャー） power switch （電源スイッチ） ac support（サポートac） photo.2 (写真2) photo.1 (写真1) 2. Ac support (time required: about 2 minutes) 2-1 remove the bottom case. (see procedure 1.) 2-2 remove the scr...

  • Page 14: Ic Block Diagram

    14 mg10/2 njm4558m (te1) (x5676a00) main: ic103, 304, 404, 503, 603 dual operational amplifier njm4556al (xp844a00) main: ic806 dual operational amplifier lb1412m (x5838a00) main: ic803, 805 led driver njm2068m-d (te2) (x3505a00) main: ic202, 302, 303, 402, 403, 501, 502, 601, 602, 701, 702, 802 njm...

  • Page 15: Circuit Board

    Mg10/2 15 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-r out r l r l r line insert i/o gain peak peak peak peak hpf high mid low aux pan level 1 2 3/4 5/6 7/8 9/10 pan/bal pan/bal bal bal phantom ...

  • Page 16

    16 mg10/2 • main circuit board pattern side （パターン側） 2na-we52140

  • Page 17: Inspections

    Mg10/2 17 1. Measurement conditions 1-1. Environment normal temperature (10 to 35c) normal humidity (45 to 85%) 1-2. Power source the voltage is within +/-10%. Ac adaptor (pa-10) shall be used. Wc703600 (h,w:230v) or wc703500 (u,v:120v), wc703700 (b:230v), wc703800 (k:220v), wc703900 (a:240v), wc711...

  • Page 18

    18 mg10/2 input input level gain insert out rec out l rec out r 1,2 mic 1, 2 -72 max – – ch insert in 1 0 unspecified – ch insert in 2 0 unspecified – – input input ch input level gain st l out st r out aux1 aux2 mic -72 max -28 min – – – phone jack 3,5l -46 max – 4,6r – table 2.6.3 input terminal s...

  • Page 19

    Mg10/2 19 eq control eq gain applied frequency variation width hi max 10khz min mid max 2.5khz min lo max 100hz min table 2.9.1 [db] +12 +/-2 -12 +/-2 +12 +/-2 -12 +/-2 +15 +/-2 -15 +/-2 input peak led mic table 2.11.1 [dbu] -43 +/-2 2-8. Hpf in the state of the table 2.6.1 and 2.6.2, feeding 80 hz ...

  • Page 20

    20 mg10/2 vr stereo out aux out c-r out max -81.0 -85.0 -87.0 min -100.0 – -93.0 table 2.16.1 [dbu] 2-14. Maximum output in the state 2-2., 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 b...

  • Page 21: 検査

    Mg10/2 21 1. 測定条件 1-1. 環境 常温 （10〜35℃） 常湿 （45〜85%） 1-2. 電源電圧 電源電圧の ±10%以内 ac アダプター （pa-10） を使用します。 wc703400 （j:100v） 2. 電気的特性 2-1. 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： 10 kΩ 2-2. 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 gain control max （-60dbu） 80 switch off eq (high, mid, low) ...

  • Page 22

    22 mg10/2 表 2.6.2 ［dbu］ 表 2.6.3 input terminal stereo in ［dbu］ 表 2.6.4 input terminal stereo in ［dbu］ 表 2.6.5 input terminal retern l,r ［dbu］ 表 2.6.6 input terminal 2tr in l,r ［dbu］ input input level gain insert out rec out l rec out r 1,2 mic 1, 2 -72 max – – ch insert in 1 0 unspecified – ch inser...

  • Page 23

    Mg10/2 23 表 2.9.1 ［db］ eq control eq gain applied frequency variation width hi max 10khz min mid max 2.5khz min lo max 100hz min +12 +/-2 -12 +/-2 +12 +/-2 -12 +/-2 +15 +/-2 -15 +/-2 表 2.11.1 ［dbu］ input peak led mic -43 +/-2 2-8. Hpf 表2.6.1 、表2.6.2 の状態で入力レベル -36dbu 、gain をmin として入力信号を80hz とし、 80 sw...

  • Page 24

    24 mg10/2 vr stereo out aux out c-r out max -81.0 -85.0 -87.0 min -100.0 – -93.0 表 2.16.1 ［dbu］ 2-14. 最大出力 2-2. 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pan/bal, bal control をそ...

  • Page 25: Parts List

    Parts list contents overall assembly .............................................. 2 electrical parts ........................................ 4-18 warning components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. ...

  • Page 26: ■ Overall Assembly

    2 mg10/2 90 90 100 110 150 50 170 160 180 100 130 210 250 250 280 280 130 140 120 270 260 80 190 60 290 200 290 250 90 10 250 90 90 250 20 hexagon nut & washer are accessories of phone jack. (六角ナットとワッシャーは、ホーンジャックの付属品です。) reflector meter （リフレクターmeter） ■ overall assembly （総組立）.

  • Page 27

    3 mg10/2 ac adaptor (pa-10) output : ac19v x 2 0.62a (1) ac (3) ac (2) gnd 10 20 50 60 80 90 100 110 120 130 140 150 160 170 180 190 200 210 250 260 270 280 290 -- we521400 va126400 we718500 wd799900 we807000 wd237400 v9665200 v9665300 v9665400 v9665500 wa009900 wa010000 v9664700 v9664800 wd233300 -...

  • Page 28: ■ Electrical Parts

    4 mg10/2 ■ electrical parts （電気部品） 10 60 70 80 90 c01 c02 c03 c04 c05 -08 c09 c10 -13 c14 c15 c16 c17 c18 c101 c102 c103 c104 c105 -107 c108 c109 c110 c111 c112 c113 c114 c115 c116 c117 c118 c119 c120 c121 c122 c123 c124 c125 c126 c127 c128 c132 c133 c134 c135 c136 c137 c138 c141 c142 c143 c144 c145...

  • Page 29

    5 mg10/2 ref no. Part no. Description remarks qty rank : new parts rank: japan only 部 品 名 c210 c211 c212 c213 c214 c215 c216 c217 c218 c219 c220 c221 c222 c223 c224 c225 c226 c227 c228 c232 c233 c234 c235 c236 c237 -241 c242 c244 c245 c301 c302 c303 c304 c305 -307 c308 c309 c310 c311 c312 c313 -315 ...

  • Page 30

    6 mg10/2 ref no. Part no. Description remarks qty rank : new parts rank: japan only 部 品 名 v9726500 ua654470 us062100 us062100 us061470 us061470 v9726600 v9726600 us064100 us064100 v9726400 v9726400 us062100 us062100 v9729000 v9729000 v9726500 v9726500 us062470 us062470 v9726600 us062100 us062100 us0...

  • Page 31

    7 mg10/2 ref no. Part no. Description remarks qty rank : new parts rank: japan only 部 品 名 v9726500 us062100 us062100 us061470 us061470 v9726500 v9726500 ua654120 ua654150 ua654100 ua654150 ua654100 ua654120 ua653390 ua653390 us061270 us062100 us061270 us062100 us063100 v9726600 v9726600 v9726500 v97...

  • Page 32

    8 mg10/2 -704 c705 -708 c709 -712 c713 c714 c715 c716 c717 -720 c721 c722 c723 c724 c725 c726 -728 c801 c802 c803 c804 c805 c806 c807 c808 c809 c810 c811 c812 c813 c814 c815 c816 c817 c818 c819 c820 c821 c822 c823 -828 c829 c830 c831 c832 c833 c834 c835 c836 -841 c842 c843 c844 c845 c846 c847 c848 c...

  • Page 33

    9 mg10/2 s s vn771700 vn771700 wd543900 vt332900 vt332900 vt332900 vt332900 vu801500 vu801500 kb001770 kb001770 x4930a00 x4931a00 x4153a00 x4928a00 xt157a00 x5676a00 xt157a00 x3505a00 xt157a00 x3505a00 x3505a00 x5676a00 xt157a00 x3505a00 x3505a00 x5676a00 x3505a00 x3505a00 x5676a00 x3505a00 x3505a00...

  • Page 34

    10 mg10/2 ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ｝ ld201 ld301 ld401 ld801 ld802 ld803 ld804 ld805 ld806 ld807 ld808 ld809 ld810 ld811 ld812 ld813 ld814 ld815 ld816 ld817 ld818 ld819 ld820 ld821 ld822 ld823 ld824 ld825 q01 q101 q102 q102 q103 q104 q104 q105 q105 q106 q106 q201 q202 q202 q203 q204 q204 q205...

  • Page 35

    11 mg10/2 ｝ ｝ ｝ ｝ q801 q802 q802 q803 q803 q804 q804 r01 r02 r03 r04 r05 r101 r102 r103 r104 r105 r106 r107 r108 r109 r110 r111 r112 r113 r114 r115 r116 r117 r118 r119 r120 r121 r122 r123 r124 r125 r126 r127 r128 r129 r130 r131 r132 r133 r134 r135 r136 r137 r138 r139 r141 r143 r144 r145 r146 r147 r1...

  • Page 36

    12 mg10/2 r162 r163 r201 r202 r203 r204 r205 r206 r207 r208 r209 r210 r211 r212 r213 r214 r215 r216 r217 r218 r219 r220 r221 r222 r223 r224 r225 r226 r227 r228 r229 r230 r231 r232 r233 r234 r235 r236 r237 r238 r239 r241 r243 r244 r245 r246 r247 r248 r249 r250 r251 r252 r253 r255 r256 r257 r258 r259 ...

  • Page 37

    13 mg10/2 r313 r314 r315 r316 r317 r318 r319 r320 r321 r322 r323 r324 r325 r326 r327 r328 r329 r330 r331 r332 r333 r334 r335 r336 r337 r338 r339 r340 r341 r342 r343 r344 r345 r346 r347 r348 r349 r350 r351 r352 r353 r354 r355 r356 r357 r358 r359 r360 r361 r362 -365 r366 r369 -372 r373 r374 r375 r376 ...

  • Page 38

    14 mg10/2 r410 r411 r413 r414 r415 r416 r417 r418 r419 r420 r421 r422 r423 r424 r425 r426 r427 r428 r429 r430 r431 r432 r433 r434 r435 r436 r437 r438 r439 r440 r441 r442 r443 r444 r445 r446 r447 r448 r449 r450 r451 r452 r453 r454 r455 r456 r457 r458 r459 r460 r461 r462 -465 r466 r469 -472 r473 r474 ...

  • Page 39

    15 mg10/2 r508 r509 r510 r511 r512 r513 r514 r515 r516 r517 r518 r519 r520 r521 r522 r523 r524 r525 r526 r527 r528 r529 r530 r531 r532 r533 r534 r535 -538 r541 -544 r545 r546 r547 r548 r549 r550 r601 r602 r603 r604 r605 r606 r607 r608 r609 r610 r611 r612 r613 r614 r615 r616 r617 r618 r619 r620 r621 ...

  • Page 40

    16 mg10/2 r634 r635 -638 r641 -644 r645 r646 r647 r648 r649 r650 r701 r702 r703 -706 r711 r712 r713 r714 r715 r716 r717 r718 r719 r720 r721 r722 r801 r802 r804 r806 r807 r808 r809 r810 r811 r812 r813 r814 r815 r816 r817 r818 r819 r820 r821 r822 r823 -826 r827 r828 r829 r830 r831 r832 r833 r834 r835 ...

  • Page 41

    17 mg10/2 r852 -855 r856 r857 r858 r859 r860 r861 r862 r863 r865 r867 r868 r869 -873 r874 r875 r876 r877 r878 r879 -882 r883 r884 r885 sw101 sw102 sw201 sw301 sw401 vr101 vr102 vr103 vr104 vr105 vr106 vr107 vr201 vr202 vr203 vr204 vr205 vr206 vr207 vr301 vr302 vr303 vr304 vr305 vr306 vr307 vr401 vr4...

  • Page 42

    18 mg10/2 s * s s vr701 vr702 vr801 vr802 w01 w01a w01b w01c w01d w01e zd01 zd02 zd03 zd04 zd07 v8265100 v8265100 v8265100 v8265100 wd350000 v2422400 wa595401 - - wb071100 v3272800 vg442900 vg443700 vg441100 vg442900 vg438900 rotary variable resistor a 20k xv012313 rotary variable resistor a 20k xv0...

  • Page 43: Circuit Diagram

    Circuit diagram contents block diagram ...................................... 3 overall circuit diagram note: see parts list for details of circuit board component parts. Main ............................................................................ 4-7 signal name stl （信号名） （シート間コネクタの読み方について） （ペ...

  • Page 44

    Mg10/2 block diagram & level diagram 3 28ca1-8834984 main a b c d e f g h i j k l 2 1 3 4 5 6 7 8 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 vr80...

  • Page 45

    Overall circuit diagram 1/4 (main) mg10/2 4 28cc1-8834987-1 main : 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) ( l・l ) : metal film resistor (chip) (チップ金属被膜抵抗) ( d ) : fla...

  • Page 46

    Mg10/2 overall circuit diagram 2/4 (main) 5 28cc1-8834987-2 : 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 a b c d e f g h i j k l m n o p q 1 2 3 4 5 6 7 8 9 10 11 12 low rec out 2tr in level bal aux bal aux 2tr in return level high mid low high mid op amp op amp ...

  • Page 47

    Mg10/2 overall circuit diagram 3/4 (main) 6 28cc1-8834987-3 main : 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) a b c d e f g h i j k l 1 2 3 4 5 6 7 8 op amp op amp op amp op amp op amp op amp op amp op amp led driver led drive...

  • Page 48

    28cc1-8834987-4 7 overall circuit diagram 4/4 (main) components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. To service personnel critical components information : ceramic capacitor (セラミックコンデンサー) ( セ ) mg10/2 mai...