Sharp R-771 OE, Service Manual, Page: 5 / 34

CHAPTER I
PRODUCT DESCRIPTION
EXPLANATION OF MICROWAVE COOKING
The Sharp Counter Top Microwave Oven uses microwave
energy to produce heat in the food to be cooked. Unlike
conventional ovens microwave energy will cook foods
without applying external heat.
Microwaves, which are short electromagnetic waves of
RF (radio frequency) energy, pass through materials
such as glass, paper, china and most plastics. Materials
such as metal and aluminum foil tend to reflect
waves and may be used only as recommended in the
Materials with a high moisture content, like most foods,
absorb microwave energy. As the microwave energy
at a frequency of 2450 Megahertz enters the food, the
molecules align themselves with the energy. Because the
microwaves are changing polarity every half cycle, the food
molecules are changing direction every half cycle or
back and forth times per second. This
high speed oscillation causes friction between the
thereby converting the microwave energy to heat.
ing instructions.
SPECIFICATIONS
Power requirements
Power consumption
Microwave output power
Case dimensions
Width
Height
Depth
Cooking cavity dimensions
Width
Height
Depth
Turntable diameter
650W (2 litre water load)
627mm
400mm
458mm
395mm
260mm
422mm
Control complement
Cook Switch
60 min. Dual Speed Timer
Variable Cooking Control
Repetition Rate:
HIGH:
240V
Single phase, 3 wire earthed
Full power throughout the cooking time.
MED. HIGH:
23.2 sec. ON, 6.8 sec. OFF, approx. 70% of full power.
MED.:
16.5 sec. ON, 13.5 sec. OFF, approx. 50% of full power.
MED. LOW (DEFROST):
9.8 sec. ON, 20.2 sec. OFF, approx. 30% of full power.
LOW:
5 sec. ON, 25 sec. OFF, approx. 10% of full power.
Approx. 28kg
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