Automatic Mix Cooking Condition - Sharp R-8320E Service Manual

AUTOMATIC MIX COOKING CONDITION

Program desired cooking time and temperature by touch-
ing the number pads and the "LOW MIX/BAKE" or "HIGH
MIX/ROAST" pad.
When the "COOK" pad is touched, the following opera-
tions occur:
1. The COOK and MIX indicators light, and Convection
Fan Symbol will rotate. The numbers of the digital
readout start the count down to zero.
2. The shut-off relay (RY4) is energized.
The damper door closes from the open position.
3. The shut-off relays (RYI, RY2 and RY3) are energized,
energizing the oven lamps, turntable motor, cooling fan
motor and convection motor.
4. The heater relay is energized.
The 240 volts AC. is supplied to the heating element.
5. Now, the oven is in the convection cooking condition.
LOW MIX
BAKE
HIGH MIX
ROAST
6. When the oven temperature reaches the selected
The relationship between the convection and microwave
, 6 sec.
26 sec.
l - - y -
I
I
12 set
20 sec.
I
I
2 s e c .
Note :
34
temperature, the following operations occur:
6-l. The 240 volts A.C. is supplied to the heating
element and power transformer alternately.
6-2. The heating element operates through the
heater relay contacts and the power transformer
operates through the cook relay contacts.
6-3. These are operated by the control unit within
a 32 second time base.
power operations are as follows.
Note: The ON/OFF time ratio does not correspond
with the percentage of microwave power, be-
cause approx. 2 seconds are needed for heat-
ing of the magnetron filament.
&
I
MICROWAVE POWER
=Approx. 10%
I
I
CONVECTION TEMPERATURE
I
MICROWAVE POWER
=Approx. 30%
CONVECTION TEMPERATURE
Microwave/Convection opera-
During alternate
tion, the convection heater is energized only if
the cavity temperature drops below the set
temperature.