Sharp R-3S68, Руководство по обслуживанию

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16
R-3S68
Pin No. Signal I/O Description
19 R63 OUT Segment data signal.
Signal similar to R70.
Switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81, R82 and R83
terminal while one of diode D58 line switches on switch matrix is touched.
20 INT2 IN Signal synchronized with commercial source frequency(50Hz).
This is basic timing for time processing of LSI.
21 R81 IN Signal coming from touch tact switch.
When either one of resistor R80 line switches on switch matrix is touched, a
corresponding signal out of R61-R63 will be input into R81. When no key is touched,
the signal is held at "L" level.
22 R82 IN Signal coming from touch tact switch.
When either one of resistor R81 line switches on switch matrix is touched, a
corresponding signal out of R61-R63 will be input into R82.
23 R83 IN Signal coming from touch tact switch.
When either one of resistor R82 line switches on switch matrix is touched, a
corresponding signal out of R61-R63 will be input into R83.
24 R90 OUT Terminal not used.
25 R91 OUT Oven lamp, turntable motor and cooling fan motor driving signal. (Square
Waveform : 50Hz)
To turn on and off the control relay. The pulse signal (50Hz) is delivered to the control
relay driving circuit and cook relay control circuit.
26 R92 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power operation, the signals holds “L” level
during microwave cooking and “H” level while not cooking. In other cooking modes
(10%, 30%, 50%, 70%) the signal turns to “H” level and “L” level in repetition according
to the power level.
27 KE0 IN Input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal.
Door opened; “L” level signal.
28 VDD IN Connected to GND.