Yamaha MG16/4 User Manual

SERVICE MANUAL
■ CONTENTS
SPECIFICATIONS ......................................................... 3/5
DIMENSIONS ..................................................................... 7
PANEL LAYOUT ................................................. 8
MG12/4 CIRCUIT BOARD LAYOUT & WIRING
............................... 12
MG16/4 CIRCUIT BOARD LAYOUT & WIRING
............................... 14
MG12/4 DISASSEMBLY PROCEDURE ........ 16
MG16/4 DISASSEMBLY PROCEDURE ........ 21
IC BLOCK DIAGRAM ............................................ 26
CIRCUIT BOARDS ................................................. 27
INSPECTIONS ................................................................ 39/44
MG12/4 PARTS LIST
MG16/4 PARTS LIST
BLOCK DIAGRAM & LEVEL DIAGRAM
OVERALL CIRCUIT DIAGRAM
MG16/4
,
MIXING CONSOLE
MG12/4
Copyright (c) Yamaha Corporation. All rights reserved. PDF-K1411 ’05.06
PA
011779
MG12/4: 200304-24800
MG16/4: 200304-34800
（目次）
（総合仕様）
（寸法図）
（パネルレイアウト）
（MG12/4 ユニットレイアウト & 結線図）
（MG16/4 ユニットレイアウト & 結線図）
（MG12/4 分解手順）
（MG16/4 分解手順）
（IC ブロック図）
（シート基板図）
（検査）
（ブロック & レベルダイアグラム）
（総回路図）
A manufacture number should use this
manual with goods of 9 or more figures.
（本マニュアルは、製造番号が9桁以上の商
品でご使用ください。）
The example of a manufacture number.
（製造番号例）
JCLJ01001
UCCLJ01001
CHNCLJ01001

_____________

9-11 figures
（9〜11桁）
The service manual of PA 011677 should
be used for the goods whose manufacture
number is 7 figures.
（製造番号が7桁の商品は、PA 011677 の
サービスマニュアルをご使用ください。）
The example of a manufacture number.
（製造番号例）
LK01001

_____________

7 figures
（7桁）

Yamaha MG16/4 Specifications

General

Brand	Yamaha
Model	MG16/4
Category	Music Mixer
Language	English

Summary

Specifications

General Specifications

Detailed technical specifications including frequency response, distortion, hum, noise, and gain.

Panel Layout

Channel Control Section Layout

Layout and labeling of channel controls like Gain, EQ, Aux, Pan.

Master Control Section Layout

Layout and labeling of master section controls.

MG16/4 Circuit Board Layout & Wiring

Power Switch and AC Connector Wiring

Wiring diagram for power switch and AC connector on MG16/4.

Disassembly Procedures

MG12/4 Disassembly: Rack Mount Angle

Procedure to remove rack mount angles for MG12/4.

MG12/4 Disassembly: Bottom Cover

Procedure to remove the bottom cover for MG12/4.

MG16/4 Disassembly: Rack Mount Angle

Procedure to remove rack mount angles for MG16/4.

MG16/4 Disassembly: Bottom Cover

Procedure to remove the bottom cover for MG16/4.

Circuit Board Replacement

PS Circuit Board Replacement

Steps for replacing the PS circuit board.

Side Cover Replacement

Procedures for replacing side covers L and R.

MAIN and JACK Board Replacement

Procedures for replacing MAIN and JACK boards.

Circuit Boards Layouts

PS Circuit Board Layout

Layout diagram of the PS circuit board.

MG12/4 MAIN Circuit Board Layout

Layout diagram of the MG12/4 MAIN circuit board.

MG16/4 MAIN Circuit Board Layout

MG12/4 JACK 1/2 Circuit Board Layout

MG16/4 JACK 1/2 Circuit Board Layout

MG12/4 JACK 2/2 Circuit Board Layout

MG16/4 JACK 2/2 Circuit Board Layout

Inspections

Measurement Conditions

Electric Characteristics Preparation

Gain Setting for Inspection

Frequency Response Testing

High-Pass Filter (HPF) Testing

Channel Equalizer Testing

Crosstalk Measurement

Distortion Factor Testing

Testing distortion levels across different signal paths.

Maximum Output Level Testing

Equivalent Input Noise Measurement

Residual Noise Measurement

Phantom Power Supply Test

Parts List

Overall Assembly Parts List

Exploded view of the unit with part numbers.

Electrical Parts List

List of electrical components with part numbers and descriptions.