Page 171 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

EXERCISE 162: Detect the faults in the given Microwave

oven & rectify

Objectives

At the end of this exercise you shall be able to
• to analyze various faults in the microwave oven
• to understand and Identify parts of Microwave oven
• to dismantle faulty parts and replace as per the manual.
Requirements

Tools/Materials
• Precision screwdriver set - 1 Set. • Replacement parts - as reqd.
• Tweezers - 1 Pair. • Magnifying glass - 1 No.
• Plastic opening tools - 1 Set. • Digital Multimeter with probes - 1 No.
• Heat gun - 1 No. • User Manual of the given
• soldring iron - 1 No. Microwave oven - 1 No.
• desoldring pump - 1 No. • Microwave oven of any
Brand (1000 w) - 1 No.
Procedure

Faults Identified
Oven is not heating up
1 Due to Faulty Magnetron- Motor Assembly
Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are
contained in one assembly)
Parts Explanation Photo Explanation

1 Disconnect all lead wires from
the magnetron and lamp.

Magnetron, Motor 2 Remove a screw securing air
Assembly and Lamp cover.

3 Remove the air cover.

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