Sharp R-967 Service Manual page 14

Microwave oven grill and convection
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GRILL COOKING CONDITION
TOP GRILL (Figure O-3a)
In this condition the food is cooked by the grill heating
element . Programme the desired cooking time by touch-
ing the TIME keys and touch the GRILL key once. When
the + 1min / START key is touched, the following opera-
tions 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 elements.
4. Now, the food is cooked by the top grill heating ele-
ments.
NOTE: The convection cooking condition will be carried
out simultaneously until the temperature of the
oven cavity rise to 220˚C.
CONVECTION COOKING CONDITION
PRE-HEATING (by 40˚C - 130˚C)
Programme the desired convection temperature of 40˚C -
130˚C by touching CONVECTION key. When the + 1min /
START key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 is energized and the main supply
voltage is applied to the convection heating element.
3. After the temperature of oven cavity rises to the se-
lected one,
the oven will continue to turned the
convection heating element on and off to maintain the
temperature for 30 minutes.
PRE-HEATING (by 160˚C _ 250˚C)
Programme the desired convection temperature of 160˚C
- 250˚C by touching CONVECTION key. When the
START key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 and RY3 are is energized and the main
supply voltage is applied to the convection heating
element and the grill heating elements.
3. After the temperature of oven cavity rises to the se-
lected one, the oven will continue to turned the convec-
tion heating element on and off to maintain the tempera-
ture for 30 minutes. And simultaneously the grill heating
element will be operated at 10% power output.
CONVECTION COOKING (by 250˚C)
Programme the cooking time by touching TIME keys. And
then programme the convection temperature of 250˚C by
touching CONVECTION key. When the
key is touched, the following operations occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
lamp, turntable motor, fan motor and convection motor
are turned on.
2. The relay RY4 and RY3 are energized and the main
supply voltage is applied to the convection heating
element and the grill heating elements.
3. The oven will continue to turn the convection heating
element on and off to maintain the temperature for the
programmed cooking time. And simultaneously the grill
heating elements will be operated at 10% power output.
CONVECTION COOKING (by 40˚C _ 230˚C)
Programme the cooking time by touching TIME keys. And
then programme the desired convection temperature of
40˚C 230˚C by touching CONVECTION key. When the
OPERATION SEQUENCE
+
1min / START key is touched, the following operations
occur:
1. The relays RY1, RY6 and RY7 are energized, the oven
2. The relay RY4 is energized and the main supply
3. The oven will continue to turn the convection heating
DUAL COOKING CONDITION
MICROWAVE AND CONVECTION (Figure O-5a)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL MODE key once. Select the
microwave power level by touching the MICROWAVE
POWER LEVEL key. And select the convection tempera-
ture by touching the CONVECTION key.
NOTE: The 100% microwave power level can not be
When the
operations occur:
1. The numbers on the digital read-out start the count
2. The oven lamp, fan motor, turntable motor and con-
3. The relay RY4 will be energized and the main supply
4. The relay RY2 is energized and the microwave energy
5. Now, the food is cooked by microwave and convection
MICROWAVE AND TOP GRILL (Figure O-5b)
Programme the desired cooking time by touching the
TIME keys. Touch the DUAL MODE key twice. Select the
+
1min /
microwave power level by touching the MICROWAVE
POWER LEVEL key. When the + 1min / START key is
touched, the following operations occur:
1. The numbers on the digital read-out start the count
2. The oven lamp, fan motor and turntable motor are
3. The relay RY3 is energized and the main supply
4. The relay RY2 is energized and the microwave energy
5. Now, the food is cooked by microwave and grill simul-
ON/OFF TIME RATIO
In dual cooking, the magnetron operate within a 48 second
+
1min / START
time base. The following table is the ON / OFF time ratio
at each power output of the magnetron
.
POWER OUTPUT
AUTOMATIC COOKING
Automatic cooking functions automatically work out the
correct cooking mode and cooking time and/or cooking
temperature. They will cook according to the special
cooking sequence. Express Cook, Express Defrost, Sen-
8
lamp, turntable motor, fan motor and convection motor
are turned on.
voltage is applied to the convection heating element.
element on and off to maintain the temperature for the
programmed cooking time.
selected.
+
1min / START key is touched, the following
down to zero.
vection motor are energized.
voltage is applied to the convection heating element.
is generated by magnetron.
energy simultaneously.
down to zero.
energized.
voltage is applied to the grill heating elements.
is generated by magnetron.
taneously.
100%
70%
50%
30%
10%
ON TIME
OFF TIME
48 sec.
0 sec.
36 sec.
12 sec.
26 sec.
22 sec.
16 sec.
32 sec.
8 sec.
40 sec.

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