The example of a manufacture number. INSPECTIONS (検査) ............17/21 (製造番号例) PARTS LIST LK01001 BLOCK DIAGRAM & LEVEL DIAGRAM (ブロックダイアグラム&レベルダイアグラム) 7 figures OVERALL CIRCUIT DIAGRAM (総回路図) (7桁) 011780 HAMAMATSU, JAPAN HAMAMATSU, JAPAN 200306-14800 Copyright (c) Yamaha Corporation. All rights reserved. PDF-K344 ’05.08...
Page 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 have therefore not been restated.
MG10/2 SPECIFICATIONS General Specifications Frequency Characteristics (ST OUT) 20 Hz-20 kHz +1 dB, -3 dB @+4 dBu, 10 kΩ (with gain control at maximum level) 0.1 % (THD+N) @+14 dBu, 20 Hz-20 kHz, 10 kΩ (with gain control at maximum level)
MG10/2 CIRCUIT BOARD LAYOUT & WIRING (ユニットレイアウト & 結線図) • Rear view • Right side view • Top view MAIN Power switch and AC connector wiring (電源スイッチとACコネクタの結線) WB071100 (Shrink Tube Black : 7 places) (熱収縮チューブ:7箇所) WA595401 (Connector 3P BROWN, RED, BLACK) Top Cover (a).
MG10/2 DISASSEMBLY PROCEDURE (分解手順) ボトムケース (所要時間:約1 分) Bottom Case (Time required: About 1 minute) Remove the five (5) screws marked [250] and the [250] のネジ5 本と[260] のネジ2 本を外し、ボトム two (2) screws marked [260]. The bottom case can ケースを外します。 (図1 )...
Page 13
MG10/2 サポートAC (所要時間:約2 分) AC Support (Time required: About 2 minutes) Remove the bottom case. (See procedure 1.) ボトムケースを外します。 (1 項参照) Remove the screw marked [270]. The AC support [270] のネジ1 本を外し、サポートAC を外します。 can then be removed. (Fig. 1, Photo. 1) (図1 、写真1)...
MG10/2 CIRCUIT BOARD (シート基板図) • MAIN Circuit Board ST OUT C-R OUT 10 R AUX1 LINE (MONO) (MONO) (MONO) (PRE) PHONES 10 R AUX2 INSERT I/O RETURN SEND GAIN PEAK PEAK PEAK PEAK PHANTOM POWER +48V HIGH PEAK RETURN 2TR IN...
Page 16
MG10/2 • MAIN Circuit Board Pattern side (パターン側) 2NA-WE52140...
MG10/2 INSPECTIONS 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),...
Page 18
MG10/2 2-6. Gain The output levels shall be within the range specified in the Table 2.6.1 to 2.6.6. Table 2.6.1 CH INPUT(1, 2) [dBu] INPUT INPUT Gain ST L OUT ST R OUT AUX1 AUX2 C-R OUT L C-R OUT R...
Page 19
MG10/2 2-8. HPF In the state of the Table 2.6.1 and 2.6.2, feeding 80 Hz -36dBu signal, and setting the GAIN to MIN, the STEREO L OUT level obtained when the 80 switch is set to ON shall be within the range of -3dB +/-2dB compared to the level obtained when the switch is set to OFF.
Page 20
MG10/2 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 be less than 1% when the output level is +7.5dBu at PHONES (L/R).
Page 22
MG10/2 2-6. 利得 2-2. の状態で各出力端子には [表2.6.1∼2.6.6] の範囲内の出力レベルが得られることを確認します。 表 2.6.1 CH INPUT(1, 2) [dBu] INPUT INPUT Gain ST L OUT ST R OUT AUX1 AUX2 C-R OUT L C-R OUT R Level 0 +/-2 *1 0 +/-2 *1 -1 +/-2 +5 +/-2 *2...
Page 23
MG10/2 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 switch をON にしたとき、 STEREO L OUT の出力レベルはOFF 時のレベルを基準として -3 ±2dB の範囲内であることを確認します。 2-9. チャンネルEQ 変化特性 2-2. 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...
Page 24
MG10/2 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。...
MIXING CONSOLE PARTS LIST (目次) CONTENTS (総組立) OVERALL ASSEMBLY ..........2 (電気部品) ELECTRICAL PARTS ........4-18 Notes : DESTINATION ABBREVIATIONS A : Australian model M : South African model B : British model O : Chinese model C : Canadian model Q : South-east Asia model D : German model T : Taiwan model...
Page 26
MG10/2 I OVERALL ASSEMBLY (総組立) 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)...
MIXING CONSOLE CIRCUIT DIAGRAM (目次) CONTENTS & LEVEL DIAGRAM BLOCK DIAGRAM (ブロック図&レベルダイアグラム) ........3 (総回路図) OVERALL CIRCUIT DIAGRAM MAIN ................4-7 Notation for Circuit Diagrams (回路図表記上の注意) 1. How to identify inter-sheet connectors (シート間コネクタの読み方について) to page 6: K8 The page number indicates the destination page. Signal name (ページNo.は信号の行先ページを示します。)...
Page 45
OVERALL CIRCUIT DIAGRAM 1/4 (MAIN) MG10/2 PHANTOM+48V to Page 6: K8 MAIN LEVEL to Page 6: J8 GAIN OP AMP to Page 6: H8 OP AMP OP AMP to Page 6: I8 MONO CH1 HIGH LINE OP AMP PEAK INSERT I/O...
Page 46
OVERALL CIRCUIT DIAGRAM 2/4 (MAIN) MG10/2 MAIN HIGH to Page 6: K8 OP AMP OP AMP ST CH to Page 6: J8 OP AMP CH7 (L)/CH8 (R) to Page 6: H8 to Page 6: I8 OP AMP OP AMP OP AMP...
Page 47
OVERALL CIRCUIT DIAGRAM 3/4 (MAIN) MG10/2 MAIN LED DRIVER OP AMP OP AMP OP AMP OP AMP LED DRIVER OP AMP OP AMP OP AMP OP AMP ( セ ) : Ceramic Capacitor (セラミックコンデンサー) from Page 4: A1 from Page 4: A1...