Pump/Asf Motor Driver Circuit - Epson SEIJ98006 Service Manual

EPSON Stylus Color 900

2.3.5 Pump/ASF Motor Driver Circuit

Like for the CR motor and the PF motor, A3957 (IC13, IC14) enables
the pump/ASF motor to perform 4W1-2 phase excitation on the
hardware basis. Figure 2-17 shows the pump/ASF motor driver circuit
block diagram. Among 2 drivers, IC13 and IC14 drives the Phase A and
Phase B, respectively.
Operating Principles
Figure 2-17. Pump/ASF Motor Driver Circuit Block Diagram
Electrical Circuit Operation Principles
Revision C
71