Lexmark Optra Color 1200 Service Manual page 31

5050-001
Registration
Paper feed stops temporarily at the registration roller to make the top
edge of the paper parallel to the photosensitive drum and to adjust
feed timing with the toner image on the photosensitive drum. In
parallel to the photosensitive drum, the rubber registration roller
presses against the metal registration upper roller. The registration
clutch controls the registration roller.
The registration sensor (photo-interrupter) detects paper as it feeds
through, senses paper jams and stops paper feed, and also starts
the electrophotographic process.
General Information
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