Yamaha MW12CX Service Manual

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 （ユニットレイアウト）.................................. 12
WIRING DIAGRAM （基板結線図）............................................................. 13
MW12CX OVERALL ASSEMBLY WIRING （MW12CX総組立配線図）....... 14
MW12C OVERALL ASSEMBLY WIRING （MW12C総組立配線図）......... 19
MW12CX DISASSEMBLY PROCEDURES （MW12CX分解手順）............ 24
MW12C DISASSEMBLY PROCEDURES （MW12C分解手順）................. 27
LSI PIN DESCRIPTION （LSI端子機能表）.................................................. 30
IC BLOCK DIAGRAM （ICブロック図）...................................................... 32
CIRCUIT BOARDS （シート基板図）........................................................... 35
INSPECTIONS （検査）.......................................................................... 45/53
PARTS LIST
IC & DIODE FIGURES （外形図）
BLOCK & LEVEL DIAGRAM （ブロック&レベルダイアグラム）
CIRCUIT DIAGRAM （回路図）
■ CONTENTS （目次）
PA 011859
Copyright (c) Yamaha Corporation. All rights reserved. 07.06
HAMAMATSU, JAPAN
このサービスマニュアルはエコパルプ
（ECF：無塩素系漂白パルプ）を使用しています。
This document is printed on chlorine free (ECF) paper.
MW12CX: 20070625 オープンプライス
MW12C: 20070625 オープンプライス
MW12CX MW12C

Yamaha MW12CX Specifications

General

Type	Analog Mixer
Channels	12
Microphone Preamps	4
Aux Sends	2
Phantom Power	Yes
EQ Bands	3
USB Interface	Yes

Summary

SPECIFICATIONS

Electrical Specifications

Details the electrical performance characteristics of the mixing console.

General Specifications

PANEL LAYOUT

Channel Control Section

Details the layout and function of controls for each input channel.

Master Control Section

Explains the layout and function of the main output and control sections.

Digital Effects Section

CIRCUIT BOARD LAYOUT

WIRING DIAGRAM

ASSEMBLY WIRING PROCEDURES

MW12CX Overall Assembly Wiring

Provides step-by-step instructions for wiring the MW12CX model during assembly.

MW12C Overall Assembly Wiring

DISASSEMBLY PROCEDURES

MW12CX Disassembly Procedures

Details the steps for safely disassembling the MW12CX model.

MW12C Disassembly Procedures

Details the steps for safely disassembling the MW12C model.

CIRCUIT BOARDS

INSPECTIONS

Measurement Conditions

Mixer Check

Details the preparation and specific control settings for various operational checks.

Frequency Characteristic

Channel Equalizer Characteristics

Distortion

Details the procedure for measuring signal distortion at various output terminals.

Maximum Output

Equivalent Input Noise

Residual Noise

COMP

Covers the Gain, Ratio, Frequency Characteristic, Distortion, and Attack/Release Time of the compressor.

DIGITAL EFFECT (MW12CX)

USB Testing

Covers testing procedures for USB recording and gain playback.

PARTS LIST

MW12CX Overall Assembly Parts

Lists all parts for the MW12CX overall assembly, with reference numbers and quantities.

MW12C Overall Assembly Parts

Lists all parts for the MW12C overall assembly, with reference numbers and quantities.

Electrical Parts

CIRCUIT DIAGRAM