Epson LQ 1050 Technical Manual - Page 88
GAE05A15HA
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REV.-A q 4-phase Stepper Motor Drive IC (IC2A: STK6722HZ) g~ The 4-phase stepper motor drive IC directly drives the carriage motor, under control of the gate arrays (IC3A: E05A15HA and IC7A: E05A16GA). Figure 2-36 shows the carriage motor drive circuit block diagram. GA(E05A15HA) STK6722 (3A) CRA CRB CRC CRD (2A) 1A OA IB Ic OB ID F GA(E05A 16GA) (7A) PD 1 Pco Oc PD OD Vref Pc 1 CCD CAB F 1 I . ., + t-. Figure 2-36. Carriage Motor Drive Circuit Block Diagram 2-44
REV.-A
4-phase Stepper Motor Drive
IC
(IC2A:
STK6722HZ)
g~
The 4-phase stepper motor drive
IC
directly drives the carriage motor, under control of the gate arrays
(IC3A:
E05A15HA and
IC7A:
E05A16GA). Figure 2-36 shows the carriage motor drive circuit block
diagram.
GA(E05A15HA)
STK6722
(3A)
CRA
CRB
CRC
CRD
F
GA(E05A
16GA)
(7A)
PD 1
Pco
Pc
1
F
(2A)
1A
OA
IB
Ic
OB
ID
Oc
PD
OD
Vref
CCD
CAB
1
I
.
.,
+
t
-.
Figure 2-36. Carriage Motor Drive Circuit Block Diagram
2-44