R-879W (serv.man15) - Sharp Home Appliance User Guide / Operation Manual. Page 3

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R879(W)
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3. MICROWAVE AND BOTTOM GRILL (Figure O-5c)
Programme the desired cooking time by touching the TIME keys.
Touch the COMBI key three times. Select the microwave power level
by touching the MICRO POWER 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 ener-
gized.
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 simulta-
neously.
[6] ON/OFF TIME RATIO
In grill cooking, convection cooking or dual cooking, the top heater,
bottom heater or magnetron operate within a 54 second time base.
The following table is the ON / OFF time ratio at each power output of
the top heaters, bottom heater or magnetron.
[7] AUTO POWER CONTROL OPERATION
The magnetron, top or bottom heating elements, the fan motor or the convection motor will operate in accordance with following specification.
1. OUTPUT POWER CONTROL (MANUAL COOK)
2. OUTPUT POWER CONTROL (AUTO COOK)
POWER OUTPUT
ON TIME
OFF TIME
100%
54 sec.
0 sec.
90%
49 sec.
5 sec.
80%
45 sec.
9 sec.
70%
40 sec.
14 sec.
60%
36 sec.
18 sec.
50%
29 sec.
25 sec.
40%
24 sec.
30 sec.
30%
18 sec.
36 sec.
20%
13 sec.
41 sec.
10%
9 sec.
45 sec.
OPERATION MODE
DEVICE
POWER CONTROL
MICROWAVE (100%) 
SINGLE OPERATION
Microwave
100% 20min, then 70%
TOP GRILL (100%) 
SINGLE OPERATION
Top heater
100% 15min, then 50%
BOTTOM GRILL (100%) 
SINGLE OPERATION
Bottom heater
100% 15min, then 50%
TOP(100%)/BOTTOM(100%)
DUAL OPERATION
Top heater
100% 6min then 70% and 70% 9min then 50%
Bottom heater
100% 6min then 70% and 70% 9min then 50%
MICRO(100%)/TOP GRILL(100%)
DUAL OPERATION
Microwave
100% 20min, then 70%
Top heater
100% 15min, then 50%
MICRO(70 - 10%)/TOP GRILL(100%)
DUAL OPERATION
Microwave
-
Top heater
100% 15min, then 50%
MICRO(100%)/BOTTOM GRILL(100%)
DUAL OPERATION
Microwave
100% 20min, then 70%
Bottom heater
100% 15min, then 50%
MICRO(70 - 10%)/BOTTOM GRILL(100%)
DUAL OPERATION
Microwave
-
Bottom heater
100% 15min, then 50%
Repeat Cook
Microwave
Top heater
Bottom heater
In case same cooking mode is repeated within 1min 15sec (including stop, end), 
oven calculates total cooking time and reduce the power level.
OPERATION MODE
DEVICE
POWER CONTROL
Repeat Auto Cook
Microwave
The power level is not reduced 1 time cooking. But only in case same menu is 
repeated within 1min 15sec, the power level of micro and grill is reduced from 
100% to 70% in 20mins after starting of last cooking. (Even if the time of the last 
cooking is longer than 20mins, the power level isn't reduced on the last cooking, 
and it is reduced from the beginning of the next cooking.) However, in time calcu-
lated from the start of the 1st cooking, even if the Cook mode changed, when rep-
etition cooking of the menu with which 100% of top & bottom heaters continues 
are performed, as shown in the following table, the power down of the cooking of 
the 2nd henceforth is carried out. (The 1st cooking is not applied)
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