Ic1-7 - Toshiba 3560 Service Manual

Data Transmission Method.
FRAME
240
LOAD
FRAME
LOAD
CP
D0-D3
5.4.2 LED display circuit
(1) LED display method
For example, the following shows how the LED LP6 (APS) lights up for displaying "automatic paper
sensing".
When DSPON0 signal becomes "L" level, transistor Q3 is turned ON. Further, when IC1 pin16 (D8)
becomes "L" level, current flows from +5VD to LP6 (APS) through the transistor. In this way LP6
(APS) lights up.
Nov. 1997 © TOSHIBA
1/tF
1 2
R60
R61
DSPON0
"L"
240 1 2
CPx(320/4)pulses
+5VD
"L" 16
R
Q3
R17
(APS)
LP6
5 - 9
1/tF
240 1 2
D8
IC1
3560/70 DISPLAY