INTRODUCTION
This Microwave Oven
Service
Manuał is printed in a loose-leaf format. Each part is divided into sections relating
to a generał group of components and each section is subdivided into
various
parts
describing a
particular
component or
service
procedurę.
The subdividing of the subject matter plus the loose leaf form will facilitate the updating of the manuał as new or
revised
components and
service
procedures
arę
introduced.
Each page of this
service
manuał will be identified in the
Iower
right hand corner and, as new or revised pages
arę
published, it will be easy to keep the manuał up to
datę
by following the
filing
instructions on the cover letter.
This
Service
Manuał is a valuable
service
tool
and care should be taken to keep it up to
datę
by prompt and
proper
filling
of subsequent pages as they
arę
issued.
CONTENTS
SAFETY PRECAUTIONS 2
1 THE HEATING PRINCIPLE OF MICROWAVE 3
2 THE
STRUCTURE
AND
WORKING
PRINCIPLE
OF
MICROWWAVE
OVEN 4
2.1
HIGH
VOLTAGE RECTIFYING CIRCUIT. 4
2.2 MICROWAVE GENERATER 5
2.3 COOLING SYSTEM 5
2.4 ELECTRIC CONTROL SYSTEM 5
3 TYPICAL CIRCUIT ANALYASIS OF MICROWAVE OVEN 8
4
HOWTO
ASSEMBLE AND DISASSEMBLE MICROWAVE OVEN COMPONENTS 9
4.1 THE
GABINET
9
THE DOOR COMBINATION 10
4.3 THE CONTROL PANEL AND THE DOOR RELEASE MECHANISM 11
4.4
THEMAGNETRON
11
4.5 THETRANSFORMER 12
4.6
THE
FAN MOTOR 12
4.7
THECAPACITOR
13
4.8 THE DIODĘ 13
4.9
THETURNTABLECOMBINATIOM
14
4.10 THE DOOR SAFTY INTERLOCKS 14
THE CONTROL PANEL
OF
A
TYPICAL
MICROWAYE
OVEN 15
5
BREAKDOWN
ANALYSIS
AND
THE
MEANSOFOYERHAULING
16
5.1 EXAMINING THE BREAKDOWN CAUSES 16
SPOTEXAMININGSTEPSOFTHEMICROWAVEOVEN
16
5.3 REPAIRING METHOD OF SEVERAL BREAKDOWN 19
5.4 THE CHARACTERS
REOUIREMENTS
OF
MICROWAYE
AFTER IT HAS BEEN REPAIRED 20
6 CRITICAL PARTS
SERYICING
21
6.1 IMPORTANT THINGS TO DO
PRIOR
TO CRITICAL PARTS SERVICING: 21
6.2 Interlock Assembly Replacement and Adjustment 21
7 COMMON BREAKDOWN OF
MICROWAYE
OVEN AND MEANS OF REPAIRING ... ... 22
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