Epson Stylus COLOR 440 Service Manual page 66

EPSON Stylus COLOR 440, 640, and 740
C P U
Figure 2-24. Reset Circuit for Stylus COLOR 640
G a t e A r r a y
R e s e t
The reset IC on the main board of the Stylus COLOR 740 has a dual
role. As shown in the figure below, it combines the reset circuitry with
the power-off timer that monitors how long the printer is off.
I C 8
R T C - 9 8 1 0
+ 4 2 V I N
V D D
V B K
G N D
R e s e t
Figure 2-25. Reset Circuit for Stylus COLOR 740
Chapter 2 Operating Principles
I C 1
C 9 0 A 0 5
C P U
/ R E S
B 1
1 0
2 9
/ V D T
/ N M I
3
2 4
F R S T
M R E S
2
2 5
/ R S T
/ R E S E T
C E
G a t e A r r a y
I C 2
S C L K
E 0 5 B 5 8 8
D A T A
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