Sharp R-930AK-F Service Manual page 29

Pin No. Signal I/O
33 P27 IN
34 P26 IN
35 P25 IN
36 P24 IN
37 P23 OUT
38-40 P22-P20 OUT
41 P17 OUT
42 P16 OUT
43 P15 OUT
44 P14 OUT
45 P13 OUT
46 P12 OUT
47 P11 OUT
Signal coming from touch key.
When any one of G-1 line keys on key matrix is touched, a corresponding signal from
P10 - P17 will be input into P27. When no key is touched, the signal is held at "L" level.
Signal similar to P27.
When any one of G-2 line key on key matrix is touched, a corresponding signal will be
input into P26.
Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will be
input into P25.
Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will be
input into P24.
Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment Signal Segment
P23 ............. P1 P17 ............. P5
P22 ............. P2 P16 ............. P6
P21 ............. P3 P15 ............. P7
P20 ............. P4 P14 ............. P8
Segment data signal.
Signal similar to P23.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-12 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-11 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-10 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-9 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-8 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-7 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-6 line keys on key matrix is touched.
27
Description
Signal Segment Signal Segment
P13 ............. P9 P07 ........... P13
P12 ........... P10 P06 ........... P14
P11 ........... P11 P05 ........... P15
P10 ........... P12 P04 ........... P16
R-930AK-F
R-930AW-F