Sharp R-3A88, Service Manual

Page: 18 / 36

R-3A88
16
Pin No. Signal I/O Description
25 BUZZ OUT Signal to sound buzzer.
A: key touch sound (0.12 sec.).
B: Completion sound (2.4 sec.).
26-27 D4-D5 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.
28 D6 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G8 line keys on key matrix is touched.
29-30 D7-D8 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.
31-34 R80-R83 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.
35 R10 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.
36 R11 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G7 line keys on key matrix is touched.
37 R12 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G6 line keys on key matrix is touched.
38 R13 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G5 line keys on key matrix is touched.
39 R20 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G4 line keys on key matrix is touched.
40 R21 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G3 line keys on key matrix is touched.
41 R22 OUT Segment data signal.
Signal similar to P41.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R00-R03 terminal while one of
G2 line keys on key matrix is touched.
42 R23 OUT Segment data signal.
Signal similar to P41.