Sharp R-6R50 Service Manual page 13

Signal similar to R3.
When either one of G-2 line keys on key matrix is touched, a corresponding signal 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.
P1i7 - OUT Segment data signals.
The relation between signals and indicators are as follows:
Segment Signal Segment
br ee) OP Dk i
Le De Pd a i 2 A ee a a d
Cr Oe i a
A je i A Ss od
|
ee a ey
hot; i a os
ee ee ee eh he ee
Cr ee ee ee ey
Ce Y
Digit selection signal.
The relation between digit signal and digit are as follows:
Digit signal digit - Digit signal digit
PIG Sea ctkwe ee eee 00000 UPOF Seek cat, |
CP Do A Oe ee
8 V ae ee eT or ee 3rd PeOn i bee ae Rin oe Ce sours 6th
Normally, one pulse is output in every f&§ period, and input to the grid of the Fluorescent
Display.
----H
"8 {5OH2} | |
meek
22
a ee __ a
R-6R50(W)/(B
R-6G50(W)/{B
R-6G52(W)/{B
R-BR70(W)/(B
Segment data signal.
Signal similar to P17.
Digit selection signal.
Signal similar to P16.
Segment data signal.
Signal similar to P17.
Segment data signal.
Signal similar to P17.
Digit selection signal.
Signa! similar to P16.
Segment data signal.
Signal similar to P17.
Digit selection signal.
Signal similar P16.
Segment data signal.
Signal similar to P17.
Digit selection signal.
Signal 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.
60 OUT -
veep
sxe To
VSS IN
63
wait
Terminal for manufacture test. |
Connected to GND.
Connected to GND.
23