Epson 440 - Manual (Page 74)

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 74
Figure 2-33. Head Driver Circuit for Stylus Color 640
H8D2813(IC7)
XOVM
CTB
COM
DTB
GND
GND
25
1
20
+5
F1
+42
22
23
VHV
VHV
+5
GND
GND
GND
GND
GND
GND
VDD
15
14
12
10
8
6
4
COM
COM
COM
19
21
20
GND2
GND2
GND2
16
18
17
E05B43(IC2)
VHCTL
2
4
6
199
CCO
LAT
SI1
SI3
CLK
NCHG
BCO
THM
1
2
5
11
7
13
3
15
201
199
SW7
SW8
92
LP
HSO3
101
ICLK
HCLK
/NCHG
94
95
91
TMP95C061(IC1)
P84
15
CN8
CHG
KC1
ND1
ND2
MD1
MD2
Data
CLK
/STB
/CLR
VRF
VK
CHG
KC1
ND1
ND2
MD1
MD2
Data
CLK
/STB
/CLR
VRF
VK
VHCTL
Vcc
SI2
9
HSO2
99
HSO1
97
HSOIEN
96