Sharp R-8470, Service Manual

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SENSOR COOKING CONDITION (R-8570
Using the SENSOR COOK function, the foods are
cooked without figuring time, power level or quantity.
When the oven senses enough steam from the food, it
relays the information to its microprocessor which will
calculate the remaining cooking time and power level
needed for best results.
When the food is cooked, water vapor is developed.
The sensor “senses” the vapor and its resistance in-
creases gradually. When the resistance reaches the
value set according to the menu, supplementary cook-
ing is started.
The time of supplementary cooking is determined by
experiment with each food category and inputted into
the LSI.
An example of how sensor works:
1. Broccoli at room temperature.
Vapor is emitted very slowly.
2. Heat broccoli. Moisture ‘and humidity is emitted
rapidly. You can smell the aroma as it cooks.
3. Sensor detects moisture and humidity and calcu-
lates cooking time and variable power.
1. Touch SENSOR COOK pad.
NOTE:The oven should not be operated on SEN-
SOR COOK immediately after plugging in
the unit. Wait five minutes before cooking
on SENSOR COOK.
2. Select desired Sensor setting.
3. Touch START pad.
The coil of shut-off relay (RY-1) is energized, the
oven light and cooling fan motor are turned on, but
the power transformer is not turned on.
4. After about 16 seconds, the cook relay (RY-2) is
energized. The power transformer is turned on,
microwave energy is produced and first stage is
started.
The 16 seconds is the cooling time required to re-
move any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door
or touch STOP/CLEAR pad.
5. When the sensor detects the vapor emitted from the
food, the display switches over to the remaining
cooking time and the timer counts down to zero.
At this time, the door may be opened to stir food,
turn it or season, etc.
6. When the timer reaches zero, an audible signal
sounds. The shut-offrelay and cook relay are
de-energized and the power transformer, oven
light, etc. are turned off.
7. Opening the door or touching the STOP/CLEAR
pad, the time of day will reappear on the display
and the oven will revert to an OFF condition.
COMPUCOOK (R-8570 only)
COMPUCOOK will automatically compute the oven
temperature, microwave power and cooking time for
baking, roasting and broiling.
Set the
desired p r o g r a m b y
touching
the
COMPUCOOK pad, and number pad.
Enter the weight by touching the Number pads
When the START pad is touched, the following oper-
ations occur:
1.
2.
The COOK indicator will light and the Convection
Fan Symbol will rot ate.
The cooking time will appear on the display and
start counting down to zero.
The cooking time is adjusted automatically ac-
cording to the setting quantity or weight of food.
The shut-off relays (RY2, RY3, RY4 and RY5) are
energized, turning on the oven lamp, turntable
motor, cooling fan motor and convection motor.
The power
voltage is added to the heating
element.
Now, the oven is in the convection cooking mode.
When the oven temperature has reached the pro-
grammed convection temperature, the oven goes
into the programmed cooking mode.
At the end of the COMPUCOOK cycle, the damper
is returned to the open position and the oven will
be off condition.
The cooling fan will remain on until the oven has
cooled.
3.
4.
5.
6.
COMPU DEFROST COOKING
The COMPU DEFROST key is a special function key
to defrost meats and poultry faster and better.
COMPU DEFROST 1 to 5 automatically defrosts roast
beef, etc.
Each key has 3 defrost stages.
When the desired COMPU DEFROST number is
and the food weight is entered by using
number pad’s, the oven will cook according to
special cooking sequence.
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