Epson LQ-510 - Carriage Motor Drive Circuit

PRINCIPLES OF OPERATION
REV.-A
2.3.4.5 Carriage Motor Drive Circuit
This unit utilizes an SLA7020M IC for the stepper motor drive. This IC causes the motor to be driven at the
specified current. The current value is determined by the value of the external voltage input. Within the IC,
the AB (AA) phase and the CD (BB) phase are completely differentiated and create identical circuits. For
convenience, only the AB (AA) circuit is explained below. Figure 2-45 shows the carriage motor drive
circuit. Figure 2-46 shows the SLA7020M circuit diagram.
Figure 2-45.
Carriage Motor Drive Circuit
2-38
LQ-510