Epson Stylus Color 660 Service Manual page 112

EPSON Stylus Color 440/640/740
Chapter 2 Operating Principles
+42
F1
H8D2813(IC7)
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
E05B43(IC2)
199
VHCTL
VHCTL
201
SW7
CHG
199
KC1 SW8
92
ND1
LP
ND2
96
MD1
HSOIEN
97
MD2
HSO1
Data
99
CLK HSO2
101
/STB
HSO3
/CLR
94
ICLK
VRF
95
VK
HCLK
91
/NCHG
TMP95C061(IC1)
15
P84
Figure 2-33. Head Driver Circuit for Stylus Color 640
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
11
SI1
9
SI2
7
SI3
13
CLK
15
NCHG
3
THM
Revision A
74