Introduction

This Microwave Oven Service Manual is printed in a loose-leaf format. Each part is divided into sections relating to a general group of components and each section is subdivided into various parts describing a particular component or service procedure.

The subdividing of the subject matter plus the loose leaf form will facilitate the updating of the manual as new or revised components and service procedures are introduced.

Each page of this service manual will be identified in the lower right hand corner and, as new or revised pages are published, it will be easy to keep the manual up to date by following the filing instructions on the cover letter.

This Service Manual is a valuable service tool and care should be taken to keep it up to date by prompt and proper filling of subsequent pages as they are issued.

	CONTENTS
SAFETY PRECAUTIONS		2
EM-W3000W Microwave Oven Explode Drawing		3
EM-W3000W Microwave Oven Parts /Components List		4
1. THE HEATING PRINCIPLE OF MICROWAVE		5
2. THE STRUCTURE AND WORKING PRINCIPLE OF MICROWWAVE OVEN		6
2.1	HIGH VOLTAGE RECTIFYING CIRCUIT	6
2.2	MICROWAVE GENERATER	7
2.3	COOLING SYSTEM	7
2.4	ELECTRIC CONTROL SYSTEM	7
3. TYPICAL CIRCUIT ANALYASIS OF MICROWAVE OVEN		10
4. HOW TO ASSEMBLE AND DISASSEMBLE MICROWAVE OVEN COMPONENTS		11
4.1	THE CABINET	11
4.2.	THE DOOR COMBINATION	12
4.3	THE CONTROL PANEL AND THE DOOR RELEASE MECHANISM	13
4.4	THE MAGNETRON	13
4.5	THE TRANSFORMER	14
4.6	THE FAN MOTOR	14
4.7	THE CAPACITOR	15
4.8	THE DIODE	15
4.9	THE TURNTABLE COMBINATIOM	16
4.10	THE DOOR SAFTY INTERLOCKS	16
THE CONTROL PANEL OF A TYPICAL MICROWAVE OVEN		17
5. BREAKDOWN ANALYSIS AND THE MEANS OF OVERHAULING		18
5.1	EXAMINING THE BREAKDOWN CAUSES	18
5.2.	SPOT EXAMINING STEPS OF THE MICROWAVE OVEN	18
5.3	REPAIRING METHOD OF SEVERAL BREAKDOWN	21
5.4	THE CHARACTERS REQUIREMENTS OF MICROWAVE AFTER IT HAS BEEN REPAIRED	22
6. CRITICAL PARTS SERVICING		23
6.1	IMPORTANT THINGS TO DO PRIOR TO CRITICAL PARTS SERVICING:	23
6.2	Interlock Assembly Replacement and Adjustment	23
7. COMMON BREAKDOWN OF MICROWAVE OVEN AND MEANS OF REPAIRING		24
SPECIFICATIONS		25

SM-GA0005 specifications

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INTRODUCTION

CONTENTS

SM-GA0005 specifications