Epson Stylus PHOTO 890 Service Manual page 55

EPSON Stylus Photo 890/1280/1290
PF motor driver circuit
DC motor is used as the PF motor in this printer. IC9 (A39374SLB) on the
C393MAIN/C393MAIN-B board controls the CR and PFDC motor while
IC9(A3958SLB) on the C393MAIN-C board controls the CR motor.
The block diagram of the PF motor driver circuit is as shown below:
Figure 2-23. PF Motor Driver Circuit Block Diagram (C393MAIN)
OPERATING PRINCIPLES
Figure 2-24. PF Motor Driver Circuit Block Diagram (C393MAIN-B)
Electrical Circuit Operating Principles
Revision C
op13b
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