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R-430BK
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OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units
as shown in the touch control panel circuit:
(1) Key Unit
(2) Control Unit (The Control Unit consist of Power Unit
and LSI Unit)
The principal functions of these units and their related
signals are explained below.
Key Unit
The key unit is composed of a matrix. Signals generated
in the LSI are sent to the key unit through P20 - P27.
When a key pad is touched,
a signal is completed
through the key unit and passed back to the LSI through
AN8, AN9, AN1 0 and AN1 1 to perform the function that
was requested.
Control Unit
The Control unit consists of the following:
Synchronizing
Signal Circuit
The Power source synchronizing
signal is available
in order to compose a basic standard time in the
clock circuit. It accompanies a very small error be-
cause it works on commercial frequency.
ACL Circuit
A circuit to generate a signal which resets the LSI to
the initial state when power is applied.
Buzzer Circuit
The buzzer is responsive to signals from the LSI to
4.
5.
6.
7.
8.
emit Audible sounds (key touch sound and comple-
tion sound).
Door Sensing Switch
A switch to "tell" the LSI if the door is open or closed.
Relay Circuit
To drive the magnetron, fan motor, turntable motor
and oven lamp.
Indicator Circuit
This circuit consists of 45 segmenets and 5 com-
mon electrodes using a liquid Crystal Display.
Back Light Circuit
A circuit to drive the back light (Light emmitting
diodes LDI -LDlO).
It incorporates a very small error because it works
on commercial frequency.
Power Source Circuit
This circuit generates voltage necessary in the con-
trol unit from the AC line voltage.
In addition, the synchronizing
signal is available in
order to compose a basic standard time in the clock
circuit.
Symbol
Voltage
Application
vc
- 5v
LSI (ICI),
9.
Absolute Humidity Sensor Circuit
This circuit detects the humidity of the food which is
being cooked, to control automatic cooking.
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