Sharp R-3H57 Service Manual page 22

R-3H57
Pin No. Signal
29 P14 OUT
30 P15 OUT
31 P16 OUT
32 P47 OUT
33 P46 OUT
34 P45 OUT
35 P44 OUT
36 P43 OUT
37 P42 OUT
38 P41 OUT
39 P40 OUT
I/O
Terminal not used.
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
Terminal not used.
Terminal not used.
Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment
P46 .................. P1
P45 .................. P2
P44 .................. P3
P43 .................. P4
P42 .................. P5
P41 .................. P6
P40 .................. P7
P57 .................. P8
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G1 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G2 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G3 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G4 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G5 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G6 line keys on key matrix is touched.
Segment data signal.
Signal similar to P46.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70-P73 terminal while
one of G7 line keys on key matrix is touched.
Description
A
B
Signal Segment
P60 .................. P9
P61 ................ P10
P62 ................ P11
P63 ................ P12 (50Hz)
P64 ................ P13
P65 ................ P14
P66 ................ P15
20
0.12 sec
2.4 sec
VP
GND