Panasonic NE-1757 - Manual (Page 5)

Power Source Voltage Adjustment
The microwave oven Model NE-1757 is factory
set for 208 V operation. For 230 V-240 V operation,
the following adjustment MUST be made.
CAUTION
Make sure that the power cord is unplugged
before removing the voltage adjustment panel
cover.
(Step 1) Unscrew the voltage adjustment panel cover
which is located on the back of the oven. Do
not remove any other parts from the oven.
(Step 2) Remove the white connector and plug the
black connector into the socket.
(Step 3) Store the unused white connector in the
rectangular opening.
(Step 4) Reattach the voltage adjustment panel
cover to the cabinet.
For 230 V-240 V—Use black connector
plug.
For 208 V—Use white connector plug.
To go from 230 V-240 V to 208 V circuit follow steps
1-4 above, except at step 2, plug the white connector
plug into the socket and store the black plug in the
rectangular opening.
VOLTAGE ADJUSTMENT-
VOLTAGE
ADJUSTMENT
PANEL
COVER
SCREW
How Does The Microwave Work?
Microwaves are a form of high frequency radio waves
similar to those used by a radio including AM, FM, and
CB. They are, however, much shorter than radio
waves; approximately five inches long. Electricity is
converted into microwave energy by the magnetron
tube. From the magnetron tube, microwave energy is
transmitted to the oven cavity where it is: reflected,
transmitted and absorbed.
Reflection
Microwaves are reflected by metal just as a ball is
bounced off a wall. A combination of stationary (interior
walls) and rotating antenna, located underneath the
bottom shelf and above the ceiling cover assure that
the microwaves are well distributed within the oven
cavity to produce even heating or cooking of foods.
Transmission
Microwaves pass through some materials such as
paper, glass and plastic much like sunlight shining
through a window. Because these substances do not
absorb or reflect the microwave energy, they areideal
materials for microwave oven heating containers.
- 5 -
Absorption
During heating, microwaves will be absorbed by food.
They penetrate to a depth of about % to 1 Va inches.
Microwave energy excites the molecules in the food
(especially water, fat and sugar molecules), and
causes them to vibrate at a rate of 2,450,000,000 times
per second. This vibration causes friction, and heat is
produced just as you will feel heat produced if you
vigorously rub your hands together. The internal
heating of larger foods is done by conduction. The heat
which is produced by friction is conducted to the center
of the food. Foods also continue to heat by conduction
during standing time.
Because microwaves dissipate, much like sunlight as it
reaches the Earth’s surface, they are not stored in
food.
Radio Interference
1.. Operation of the microwave oven may cause
interference to your radio, TV or similar equipment.
2. When there is interference, it may be reduced or
eliminated by taking the following measures:
a. Clean door and sealing surfaces of the oven.
(See Care of Your Microwave Oven found on
page 17.)
b. Place the radio, TV, etc. away from the
microwave oven as far as possible.
c. Use a properly installed antenna, to obtain
stronger signal reception.