Epson Stylus SCAN 2000 Service Manual page 61

EPSON Stylus Scan 2000
2.5.2.8 CR Motor Drive Circuit
IC11(LB1847) on B101 Main board is used for driving CR motor. In the IC, Bi-polar
drive PWM current control type is performed, making it possible to provide stable
current to each phase of motor.
Operating Principles
E05B588 (IC2)
193
CRIA0
194
CRIA1
195
CRIA2
196
CRIA3
200
CRIB0
199
CRIB1
198
CRIB2
197
CRIB3
191
CRPHAA
202
CRPHAB
192
CRENBA
201
CRPHBB
C90A05
2
-
(IC1)
111 3
+
DA0
Current
Detection
M6252(IC15)
Rotor
Figure 2-32. Carriage Motor Drive Circuit
Electrical Circuit Operating Principles
The figures below show carriage motor drive circuit.
LB1847 (IC11)
25
IA1
24
IA2
23
IA3
22
IA4
18
IB1
OUTA
7
19
IB2
OUTA-
6
20
IB3
21
IB4
27
PHASE1
OUT
9
16
PHASE2
OUTB-
8
26
ENBL1
17
ENBL2
2
Vref1
13
Vref2
CN7
1
A
3
/A
2
B
4
/B
Revision A
60