Sharp R-875 Service Manual

R-875/885 - 11
AUTOMATIC COOKING
EXPRESS PIZZA
PIZZA
FUN MENUS
AUTO COOK
AUTO DEFROST
Above functions are automatic cooking. They automatically work
out the correct cooking mode and cooking time and/or cooking
temperature. They will cook according to the special cooking
sequence.
5. The relay
RY2 is energized and the microwave energy is
generated by magnetron.
6. Now, the food is cooked by microwave and convection
energy simultaneously.
MICROWAVE AND TOP GRILL (Figure O-5b)
Rotate the COOKING MODE dial to
DUAL 2 setting. And
enter the desired cooking time by rotating the TIME/WEIGHT
dial. And press MICROWAVE POWER LEVEL button to set the
desired microwave power. When the START button is pressed,
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 simulta-
neously.
MICROWAVE AND BOTTOM GRILL (Figure O-5c)
Rotate the COOKING MODE dial to
DUAL 3 setting. And
enter the desired cooking time by rotating the TIME/WEIGHT
dial. And press MICROWAVE POWER LEVEL button to set the
desired microwave power. When the START button is pressed,
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.
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)
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%)
Top heater 100% 6min then 70% and 70% 9min then 50%
DUAL OPERATION Bottom heater 100% 6min then 70% and 70% 9min then 50%
MICRO(100%)/TOP GRILL(100%) Microwave
100% 20min, then 70%
DUAL OPERATION Top heater 100% 15min, then 50%
MICRO(70 - 10%)/TOP GRILL(100%) Microwave
-
DUAL OPERATION Top heater 100% 15min, then 50%
MICRO(100%)/BOTTOM GRILL(100%) Microwave 100% 20min, then 70%
DUAL OPERATION Bottom heater 100% 15min, then 50%
MICRO(70 - 10%)/BOTTOM GRILL(100%) Microwave -
DUAL OPERATION Bottom heater 100% 15min, then 50%
OPERATION SEQUENCE
ON/OFF TIME RATIO
In grill cooking, convection 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 heater or magnetron.
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.

Sharp R-875 Specifications

General

Brand	Sharp
Model	R-875
Category	Microwave Oven
Language	English