Sharp R-3A56, Service Manual

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18
R-3A56
Pin No. Signal I/O Description
25 BUZZ OUT Signal to sound buzzer.
A: key touch sound(0.12sec.).
B: Completion sound(2.4sec.).
26 D4 OUT Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the grid
of the fluorescent display.
27 D5 OUT Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the grid
of the fluorescent display.
28 D6 OUT Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the grid
of the fluorescent display.
29 D7 OUT Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the grid
of the fluorescent display.
30 D8 OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the fluorescent display.
31 R8
0
OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the fluorescent display.
32 R8
1
OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the fluorescent display.
33 R8
2
OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the fluorescent display.
34 R8
3
OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the fluorescent display.
35 R1
0
OUT Segment data signal.
Signal similar to D8.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0
0
-R0
3
terminal while
one of G8 line keys on key matrix is touched.
36 R1
1
OUT Segment data signal.
Signal similar to D8.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0
0
-R0
3
terminal while
one of G7 line keys on key matrix is touched.
37 R1
2
OUT Segment data signal.
Signal similar to D8.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R0
0
-R0
3
terminal while
one of G6 line keys on key matrix is touched.