Sharp R-6R50 Service Manual page 16

Pin No.
35
36
37
38
39
40
Signal 1/0 Description
R2 IN Signal similar to R3.
When either one of G-2 line keys on key matrix is touched, a corresponding signa! will
be input into R2.
Signal similar to R3.
When either one of G-3 line keys on key matrix is touched, a corresponding signal will
be input into R71.
Signal similar to R3.
When either one of G-4 line keys on key matrix is touched, a corresponding signal will
be input into RO.
Anode (segment) of Fluorescent Display light-up voltage: —34V.
VP voltage of power source circuit input.
P17 Segment data signals.
The relation between signals and indicators are as follows:
Segment Signal | Segment
a tL © 1) a oc
eee eee eee eet eel el OLE UUUUUUCUC a kl hl hl hl hl hl hl hl hl hl hl Ul Cll
Ce ee
ee a Y
a a i) ©)
Ce ee ee Y
eo 6 hw ew ee kk lel le
LO A?
a |
& (50H2) | | |
—-n ee GND
a ile me —-_——— Approx.
—34V
Digit selection signal, ;
The relation between digit signal and digit are as follows:
Digit signal digit Digit signal
a A i i
[ko Oe ey
Cr SD i Oo ee er ed
Normally, one pulse is output in every & period, and input to the grid of the Fluorescent
Display. :
ma a-H
B (50H2) | | |
: week
28
R-6R50(W)/{B)
R-6R70(W)/(B)
Pin No. Signal | Description
OUT Segment data signal.
Signal similar to P17.
43 OUT Digit selection signal.
Signal similar to P16.
Segment data signal.
Signal similar to P17.
Segment data signal.
Signal similar to P17,
Digit selection signal.
Signal similar to P16.
Segment data signal,
Signal similar to P17.
Digit selection signal.
Signa! similar P16.
Segment data signal.
Signal similar to P17.
Digit selection signal.
Signa! similar P16,
Segment data signal.
Signal similar to P17.
'Digit selection signal.
Signal similar to P16,
Segment data signal.
Signal similar to P17.
Terminal not used.