Sharp R-307KW Service Manual - Page 22

R307KW Pin No. 25 26-37 38-40 41 Signal COM3 SEG0-SEG11 SEG12-SEG14 P70 I/O OUT OUT OUT OUT Description Terminal not used. Segment data signal. Connected to LCD.The relation between signals are as follows: LSI signal (Pin No.) LCD (segment) LSI signal (Pin No.) LCD (segment) SEG 0 (26 SEG 1 SEG 6 (32 SEG 7 SEG 1 (27 SEG 2 SEG 7 (33 SEG 8 SEG 2 (28 SEG 3 SEG 8 (34 SEG 9 SEG 3 (29 SEG 4 SEG 9 (35 SEG 10 SEG 4 (30 SEG 5 SEG10 (36 SEG 11 SEG 5 (31 SEG 6 SEG11 (37 SEG 12 Terminal not used. 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 16.7 msec. RY2 control circuit. H : GND 42 43 44 45-47 48-50 51 52 53 54 55 56 57 P71 P72 AVDD AIN5-AIN3 AIN2-AIN0 AVSS P11 P10 P33 P32 P31 INTP0 During cooking L : -5V OUT OUT Terminal not used. 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. Maximum output OFF ON OFF 70% of maximum 24 sec. output ON OFF 8 sec. H : GND L : -5V H : GND L : -5V IN IN IN IN IN OUT OUT OUT OUT IN A/D converter power source voltage. The power source voltage to drive the A/D converter in the LSI. Connected to GND. 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. This is the terminal to detect the voltage of the signal coming from the touch key. A/D converter power source voltage. The power source voltage to drive the A/D converter in the LSI. To input signal which communicates the door open/close information to LSI. Door close "H" level signal (0V). Door open "L" level signal (-5V) Terminal not used. 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. 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. 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 synchronized with commercial power source frequency. This is the basic timing for time processing of LSI. H : GND 16.7 msec. L : -5V Key strobe signal. 58 P26 OUT 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. Key strobe signal. 59 P25 OUT 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. Key strobe signal. 60 P24 OUT 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. 9 - 2