EPSON Stylus Photo 925 Revision A
Operating Principles Electrical Circuit Operating Principles 49
V PF Encoder
The PF Encoder consists of the loop scale mounted at the left end of the PF roller
shaft and a transmission type photosensor. It has the maximum resolution of 1/180
inch and outputs to the CPU the High signal through a black slit on the loop scale
and the Low signal through a transparent slit. The PF Motor is controlled based on
these output signals.
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