Epson Stylus Color 740 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles
64
Carriage (CR) Motor Drive Circuit
The carria
g
e motor is a bipolar stepper motor controlled b
y
a pulse-
width modulation
(
PWM
)
circuit. The drive circuit provides constant
current output for maximum motor stabilit
y
and control. See the
followin
g
fi
g
ures for circuit details.
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

Epson Stylus Color 740 Specifications

General

Brand	Epson
Model	Stylus Color 740
Category	Printer
Language	English