Sharp R-1482 Service Manual page 26

R-1480
R-1481
R-1482
Pin No. Signal I/O
41-44 P17-P14 OUT
45-48 P13-P10 OUT
49 P07 OUT
50 P06 OUT
51 P05 OUT
52 P04 OUT
53 P04 OUT
54 P02 OUT
55 P01 OUT
56 P00 OUT
57-59 P37-P35 OUT
60-64 P34-P30 OUT
Digit selection signal.
Signal similar to P23.
Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment Signal
P13 ............... P15 P03 ................ P7
P12 ............... P14 P02 ................ P6
P11 ............... P13 P01 ................ P5
P10 ............... P12 P00 ................ P4
P07 ............... P11 P37 ................ P3
P06 ............... P10 P36 ................ P2
P05 ................. P9 P35 ................ P1
P04 ................. P8
(ß : INTO signal)
Refer to the touch control panel circuit about the relation between signals and indicators.
Normally, one pulse is output in every synchronized signal (ß) period, and input to the
anode of the fluorescent display.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G8 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G7 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G6 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G5 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G4 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G3 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G2 line keys on key matrix is touched.
Segment data signal.
Signal similar to P13.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P27 - P24 terminal while one
of G1 line keys on key matrix is touched.
Segment data signal.
Terminal not used.
24
Description
Segment
ß(60Hz)
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
Signal similar to P13.
GND
VP