Goldstar MA-2005ST, Service Manual

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1. How a Microwave Oven Works
The microwave oven is one of the great inventions of the 20th century - millions of homes in world have one. Microwave
ovens are popular because they cook food incredibly quickly. They are also extremely efficient in their use of electricity
because a microwave oven heats only the food - nothing else.
A microwave oven uses microwaves to heat food. Microwaves are radio waves. In the case of microwave ovens, the
commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have
an interesting property: they are absorbed by water, fats and sugars. When they are absorbed they are converted directly into
atomic motion - heat. Microwaves in this frequency range have another interesting property: they are not absorbed by most
plastics, glass or ceramics. Metal reflects microwaves, which is why metal pans do not work well in a microwave oven.
2. Type of Microwave Oven
1) MICROWAVE COOKING (solo model)
Using the energy of microwaves only, food is cooked quickly without altering its
colour and shape. Microwaves generated by a magnetron enter the oven and cook
the food evenly on a rotating turntable. Power control can be adjusted in 11 steps
which can enable a variety of goods to cook at a suitable power for the best
results.
2-1. Function & Type (1/2)