Epson Stylus Color 640 Service Manual page 73

EPSON Stylus Color 440/640/740
Chapter 2 Operating Principles
+42
F1
H8D2813(IC6)
2
CHG
XOVM
4
KC1
CTB
ND1
COM
6
ND2
DTB
MD1
MD2
+5
Data
CLK
20
/STB
Vcc
/CLR
1
GND
VRF
GND
VK
25
E05B44(IC2)
200
199 SW7
VHCTL
VHCTL
198
SW8
CHG
90
KC1
LP
ND1 99
BIEN
ND2
100
MD1 BHSO
97
MD2
YCMIEN
Data
96
YCMHSO
CLK
93
/STB
ICLK
/CLR
92
BCHCLK
VRF
89
VK /NCHG
TMP95C061(IC1)
20
AN0
Figure 2-32. Head Drive Circuit for Stylus Color 440
22
CN8
VHV
23
VHV
+5
15
VDD
14
GND
12
GND
10
GND
8
GND
6
GND
4
GND
19
COM
20
COM
21
COM
16
GND2
17
GND2
18
GND2
1
BCO
2
CCO
5
LAT
9
SI1
7
SI2
11
CLK
13
NCHG
3
THM
Revision A
73