R-795M (serv.man16). Complete - Sharp Home Appliance Service Manual (repair manual). Page 7

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1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY3 is energized and the main supply
voltage is applied to the top grill heating element.
4. Now, the food is cooked by the top grill heating element.
BOTTOM GRILL (Figure O-3b)
In this condition the food is cooked by bottom grill heating
element energy. Programme the desired cooking time by
touching the TIME keys and touh the GRILL key twice. When
the STARTkey is touched, the following operations occur:
1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY4 is energized and the main supply
voltage is applied to the bottom grill heating element.
4. Now, the food is cooked by the bottom grill heating
element.
TOP AND BOTTOM GRILL (Figure O-3c)
In this condition the food is cooked by top and bottom grill
heating elements energy. Programme the desired cook-
ing time by touching the TIME keys and touh the GRILL
key three times. When the STARTkey is touched, the
following operations occur:
1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY4 is energized and the main supply
voltage is applied to the bottom grill heating element.
4. The relay RY3 is energized and the main supply
voltage is applied to the top grill heating element.
5. Now, the food is cooked by the top and bottom grill
heating elements.
OVEN COOKING CONDITION
PRE-HEATING (Figure O-4)
Programme the desired oven temperature by touching
OVEN (˚C) key. When the STARTkey is touched, the
following operations occur:
1. The coil shut-off relays RY1  and RY6 are energized,
the oven lamp, cooling fan motor and turntable motor
are turned on.
2. The coil shut-off relays RY3  and RY4 are energized by
control unit and the main supply voltage is added to the
top and bottom heating elements.
3. When the oven temperature reaches the selected pre-
heat temperature,  the following operations occur:
3-1. The coil shut-off relays RY3  and RY4 are energized
by control unit temperature circuit and thermistor,
opening the circuit to the top and bottom grill heating
elements.
3-2. The oven will continue to function for 30 minutes,
turning the top and bottom heating elements on and
off, as needed to maintain the selected pre-heat
temperature. The ovenwill shut-down completely af-
ter 30 minutes.
OVEN COOKING (Figure O-4)
When the pre-heat temperature is reached, a beep signal
will sound indicating that the holding the temperature has
been reached in the oven cavity. Open the door and place
the food to cooked in the oven. Program desired cooking
time by touching the TIME keys and program oven tem-
perature by touching the OVEN (˚C) key . When the
START key is touched, the following operations occur:
1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relays RY3  and RY4 are energized (if the cavity
temperature is lower than selected temperature) and
the main supply voltage is applied to the top and
bottom heating elements to return to the selected
cooking temperature.
4. Upon completion of the cooking time, the audible signal
will sound, and the oven lamp, turntable motor, cooling
fan motor, top and bottom heating elements are de-
energized. At the end of cooking cycle, if the cavity air
temperature above 120˚C, the circuit to the relay RY6
will be maintained (by the thermistor circuit) to continue
operation of the cooling fan motor until temperature
drops below 105˚C, at that time the relay RY6 will be de-
energized, turning off the fan motor.
DUAL COOKING CONDITION
MICROWAVE AND TOP GRILL  (Figure O-5a)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL GRILLL key once. Select the
microwave power level by touching the MICROWAVE
POWER LEVEL key. When the STARTkey is touched, the
following operations occur:
1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY3 is energized and the main supply
voltage is applied to the top grill heating element.
4. The relay RY2 is energized and the microwave energy
is generated by magnetron.
5. Now, the food is cooked by microwave and top grill
simultaneously.
MICROWAVE AND BOTTOM GRILL  (Figure O-5b)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL GRILL three twice. Select the
microwave power level by touching the MICROWAVE
POWER LEVEL key. When the STARTkey is touched, the
following operations occur:
1. The numbers on the digital readout start the count
down to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY4 is energized and the main supply
voltage is applied to the bottom grill heating element.
4. The relay RY2 is energized and the microwave energy
is generated by magnetron.
5. Now, the food is cooked by microwave and bottom grill
simultaneously.
ON/OFF TIME RATIO
In grill cooking, oven cooking or dual cooking, the top
heater, bottom heater or magnetron operate whithin a 54
second time base. The following table is the ON / OFF time
ratio at each power output of the top heaters,
bottom heate or magnetron.
OPERATION SEQUENCE
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