(分解手順) ......... IC BLOCK DIAGRAM (IC ブロック図) ......... CIRCUIT BOARDS (シート基板図) ..........23/25 INSPECTION (検査) ..............PARTS LIST OVERALL CIRCUIT DIAGRAM (総回路図) u163 011727 Copyright (c) Yamaha Corporation. All rights reserved. PDF-K966 I M Printed in Japan '04.3 200406**-73500 http://www.xiaoyu163.com...
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 already known and understood by the users, and have therefore not been restated.
MLA8 3 7 63 1515 0 Iuput Characteristics Input Level *1 Actual Load For Use With Connector In Gain Impedance Nominal Amplifier unit Nominal Max. before Clip – 60 dBu – 40 dBu (0.775 mV) (7.75 mV) – 60 –...
MLA8 3 7 63 1515 0 DISASSEMBLY PROCEDURE (分解手順) トップカバー(所要時間: 約2分) Top Cover (time required: about 2 minutes) 1-1 Remove the five (5) screws marked [320], the four 1-1. [320]のネジ5本と[325]のネジ4本を外し、[340] (4) screws marked [325], the angle bracket and the のネジ6本とラックアングルを外して、トップ...
Page 11
MLA8 3 7 63 1515 0 PS 1/2シート(所要時間: 約3分) PS 1/2 Circuit Board (time required: about 3 minutes) 5-1 Remove the top cover. (See Procedure 1.) 5-1. トップカバーを外します。(1項参照) 5-2 Remove the six (6) screws marked [140]. The PS 5-2. [140]のネジ6本を外して、PS 1/2シートを外し...
MLA8 3 7 63 1515 0 CIRCUIT BOARDS (シート基板図) HAJK 1/4 Circuit Board HAJK 1/4 ( シート) to HAJK 2/4-CN108 to HAJK 2/4-CN308 to IN-CN102 to IN-CN102 to IN-CN102 to IN-CN102 to IN-CN103 to IN-CN103 to IN-CN103 to IN-CN103...
Page 15
MLA8 3 7 63 1515 0 to HAJK 2/4-CN508 to HAJK 2/4-CN708 to IN-CN102 to IN-CN102 to IN-CN102 to IN-CN102 to IN-CN103 to IN-CN103 to IN-CN103 to IN-CN103 L 13942296513 +48V +48V +48V +48V GAIN 5 GAIN 6 GAIN 7 GAIN 8 A’...
Page 17
MLA8 3 7 63 1515 0 L 13942296513 Pattern side (パターン側) B’ u163 2NA-WC13360 http://www.xiaoyu163.com...
Page 18
MLA8 3 7 63 1515 0 HAJK 3/4 Circuit Board HAJK 3/4 ( シート) OUTPUT Components side (部品側) L 13942296513 HAJK 2/4 HAJK 2/4 Circuit Board ( シート) to HAJK 1/4-CN503 to HAJK 1/4-CN103 to HAJK 1/4-CN703 to HAJK 1/4-CN303...
Page 19
MLA8 3 7 63 1515 0 IN Circuit Boards x8( シート x8) IN: CN103 (PEAK, SIGNAL 1): to HAJK 1/4-CN102 (PEAK, SIGNAL 2): to HAJK 1/4-CN202 (PEAK, SIGNAL 3): to HAJK 1/4-CN302 (PEAK, SIGNAL 4): to HAJK 1/4-CN402 (PEAK, SIGNAL 5): to HAJK 1/4-CN502...
Page 20
MLA8 3 7 63 1515 0 IN Circuit Board ( シート) L 13942296513 Pattern side (パターン側) HAJK 2/4 Circuit Board HAJK 2/4 ( シート) u163 D’ http://www.xiaoyu163.com...
Page 21
MLA8 3 7 63 1515 0 HAJK 3/4 HAJK 3/4 Circuit Board ( シート) Pattern side (パターン側) L 13942296513 Pattern side (パターン側) u163 D’ 2NA-WC13360 http://www.xiaoyu163.com...
Page 22
MLA8 3 7 63 1515 0 PS 1/2 PS 1/2 Circuit Board ( シート) to POWER TRANSFORMER to HAJK 2/4-CN109 (SECONDARY) L 13942296513 Components side (部品側) to HAJK 1/4-CN105 PS 2/2 Circuit Board PS 2/2 ( シート) to POWER TRANSFORMER...
MLA8 3 7 63 1515 0 INSPECTION Measurement conditions 1) Power source U, C, V, T: 120V H, B, W, K: 230V 2) Instruments: Low-frequency oscillator, Analog waveform-measuring instrument Electrical characteristic 2-1. Preparation The load resistances for each output terminals are as follows.
Page 24
MLA8 3 7 63 1515 0 2-13. Equivalent input Noise An input terminal is short-circuited by 150 Ω In the state of the Table 2-6 , The noise level obtained with an output terminal shall be less than -64 dBu.
Page 25
MLA8 3 7 63 1515 0 検査 測定条件 1) 電源電圧:100 V 2) 測定器:低周波発振器、アナログ波形測定器、交流電圧計 (測定器の入力インピーダンスは1 MΩ以上) 電気的特性 2-1. 準備 出力端子の負荷抵抗は下記に従ってください。 Output: 10 kΩ 2-2. 特に指定のない場合、ツマミ類は以下のように設定します。 GAIN control: MAX (-60 dBu) switch: 26 dB switch: +48 V (PHANTOM) switch: OFF 2-3. 特に指定のない場合、入力信号は1 kHzサイン波とします。...
http://www.xiaoyu163.com 3 7 63 1515 0 MIC LINE AMPLIFIER PARTS LIST CONTENTS(目次) OVERALL ASSEMBLY(総組立) ..........2 ELECTRICAL PARTS(電気部品) ..........4 L 13942296513 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...