Epson Stylus Color 740

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles
57
Figure 2-24. Reset Circuit for Stylus COLOR 640
The reset IC on the main board of the St
y
lus COLOR 740 has a dual
role. As shown in the fi
g
ure below, it combines the reset circuitr
y
with
the power-off timer that monitors how lon
g
the printer is off.
Figure 2-25. Reset Circuit for Stylus COLOR 740
PST592D
(IC 8 )
Vcc
Vout
NRES
GND
+5V
C47
R138
+5V
R1
/RESET
TM P95C 061
(IC 1 )
P85
E05B43
(IC 2 )
/RESET
174
30
16
1
2
3
4
M 62030
(IC 9 )
VCC
2
4
R6
+42V
R10
+5V
MRES
OUT2
OUT1
/N M I
10
P84
15
5
6
7
8
GND
IN
N ot m ounted
CPU
G a te A rra y
Reset
TT ii mm ee rr
SS ii gg nn aa ll
/N M I
MRES
/RESET
IC 1
C 90A 05
/R E S
B1
10
3
2
29
24
25
+42
TT ii mm ee rr
SS ii gg nn aa ll
VIN
VDD
VBK
GND
/V D T
FRST
/R S T
CE
SCLK
DATA
IC 8
R TC -9810
IC 2
E05B 588
CPU
G a te A rra y
Reset