Sharp R-8320E, Service Manual

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CHAPTER Ill
OPERATION
NORMAL COOKING SEQUENCE
MICROWAVE COOKING
Place the food to be cooked in the oven and close the
door firmly.
2. Set the touch control for desired condition by touch-
ing the NUMBER and Variable Selection pads.
The HIGH indicator will light.
3. Touch the “COOK” pad.
The COOK indicator light will glow indicating the oven
is in the cook cycle and the oven lamps, cooling fan
motor and turntable motor will come on.
Note:
If the oven door is opened or the “STOP” pad
is touched during the cooking operation, the
oven will go out of the cook cycle (no
microwave energy) and the time display will
stop. This is done so the exact cooking time
remains on the display.
To restore cooking operation, the door must
be closed and the “COOK” pad must be touch-
ed again.
4. At the end of the cook cycle, the COOK and HIGH
indicator lights will go out, and audible signal will
sound for a few seconds.
The oven will stop supplying the microwave energy.
The cooling fan motor, oven lamps and turntable motor
will go off.
CONVECTION COOKING
(Example: Preheat the oven at
1. Place the turntable in the oven and close the door firmly.
2. Set the convection temperature by touching the
CONVECTION and pads.
The CONV indicator and 70 C wil appear on display.
3. Touch the “COOK” pad.
The Convection Fan Symbol on display will flash on and
off, and display will show LO C.
The COOK indicator will glow indicating the oven is in
the convection cycle, and the oven lamps, cooling fan
motor, turntable motor and convection motor will come
on.
Note:
If the door is opened or “STOP” pad is
touched during the preheating operation, the
oven will go out of the preheating cycle (no
heater energy) and the temperature display
will stop. This is done so the exact preheating
temperature remains on the display.
To restore preheating operation, the door
must be closed and “COOK” pad must be
touched again.
4. A beep will sound four times to signal when oven
temperature has reached 70°C (and the Convection Fan
Symbol will stop flashing and begin to rotate).
5. Place the food to be cooked in the oven and close
the door firmly.
6. Set the convection cooking time by touching the
NUMBER pads and touching the “CONVECTION”
and pads, and “COOK” pad must be touched
again.
The convection cooking time now counts down to zero.
7. At the end of the convection cook cycle, the COOK
and CONV indicator will go out, and an audible
signal will sound for a few seconds.
The oven will stop the convection cooking operation.
The cooling fan motor, oven lamps, turntable motor and
convection motor will also go off.
DESCRIPTION OF OPERATING SEQUENCE
(Australia Model)
The following is a complete description of component
function during the three stages of oven operation.
OFF CONDITION
touch the “CLE-AR” pad. This will cancel and
will appear on the display and count up every one
minute.
2. A signal is input to the control unit, energizing the coil
of shut-off relay (RY4).
Closing the door activates both door latch switches: upper
RY4 contacts close, completing a circuit to the damper
latch switch and lower latch switch. (In this condition, the
motor.
monitor switch is opened) The damper motor now operates moving the damper to
The stop switch on the control panel is activated by the
the open position, thereby closing the contacts of the
door lever.
damper switch inputs a signal to the control
When oven is plugged in, the 240 volts A.C. is supplied
unit.
to the transformer on the relay unit, and the transformer
is energized. But no components in the oven will operate
The coil of shut-off relay (RY4) de-energized,
ing its contacts, thereby turning off the damper motor.
except damper motor which will run until the damper is
fully open. (Figure 1)
A display will show a flashing
Note: When the door is opened by pushing the
door open button, the oven lamps and cooling
fan motor come on.
To set any program or set the clock, you must first
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