Read Sharp R-247 Service Manual online
R-247(SL)
R-247(W)
14
41
P70
OUT
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
42
P71
OUT
Terminal not used.
43
P72
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds “L” level during microwave
cooking and “H” level while not cooking. In
other cooking modes (variable cooking) the
signal turns to “H” level and “L” level in
repetition according to the power level.
signals holds “L” level during microwave
cooking and “H” level while not cooking. In
other cooking modes (variable cooking) the
signal turns to “H” level and “L” level in
repetition according to the power level.
44
AVDD
IN
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
45-47
AIN5-AIN3
IN
Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the
Model in operation is applied to set up its cooking constant.
By using the A/D converter contained in the LSI, DC voltage in accordance with the
Model in operation is applied to set up its cooking constant.
48-50
AIN2-AIN0
IN
This is the terminal to detect the voltage of the signal coming from the touch key.
51
AVSS
IN
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI.
The power source voltage to drive the A/D converter in the LSI.
52
P11
IN
To input signal which communicates the door open/close information to LSI.
Door close “H” level signal (0V). Door open “L” level signal (-5V).
Door close “H” level signal (0V). Door open “L” level signal (-5V).
53
P10
OUT
Terminal not used.
54
P33
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G1 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G1 line keys on key matrix is touched.
55
P32
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G2 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G2 line keys on key matrix is touched.
56
P31
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G3 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G3 line keys on key matrix is touched.
57
INTP0
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
58
P26
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G4 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G4 line keys on key matrix is touched.
59
P25
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G5 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G5 line keys on key matrix is touched.
60
P24
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G6 line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53
terminal while one of G6 line keys on key matrix is touched.
61
P23
OUT
Terminal not used.
62
P22
OUT
Terminal not used.
63
BZO90
OUT
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
64
P20
OUT
Terminal not used.
Pin No.
Signal
I/O
Description
20 msec.
During cooking
H : GND
L : -5V
Maximum
output
70% of maximum
output
H : GND
L : -5V
H : GND
L : -5V
ON
ON
OFF
OFF
OFF
24 sec.
8 sec.
20 msec.
H : GND
L : -5V
A
B
0.1 sec.
2.0 sec.
H : GND
L : -5V
H : GND
L : -5V
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