Epson 440 - Manual (Page 78)

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 78
2.2.4.8 CR Motor Drive Circuit
IC14(LB1845) on C206 Main-B, C255 Main board, IC14(UDN2917) on
C256 Main board, and IC11(LB1847) on C257 Main board are used for
driving CR motor. In the IC, Bi-pola drive PWM current control type is
performed, making it possible to provide stable current to each phase of
motor. The figures below show carriage motor drive circuit.
Figure 2-38. Carriage Motor Drive Circuit for Stylus Color 440
E05B44
(IC2)
PFAPH
CRA1
CRA0
CRBPH
CRB1
CRB0
CRV0
CRV1
CRV2
CRV3
77
76
75
46
47
48
49
LB1B45
(IC14)
PH1
I11
25
23
I01
22
74
PH2
18
73
I12
20
72
I02
21
Vref1
Vref2
26
17
+5
Out1A
Out1B
Out2A
Out2B
7
6
9
8
Rotor
A
/A
B
/B
1
3
2
4
CN6