Lexmark Optra Color 1200 Service Manual page 30

5050-001
Paper Cassette Feeder
The printer controller sends a signal to the paper feed solenoid
which turns on and drives the paper feed roller connected to drive 1
by a spring clutch. The paper in the cassette is picked one sheet at a
time.
Multipurpose Feeder
After it receives a signal from the printer controller, the MPF solenoid
turns on and drives the MPF roller connected to drive 1 by a spring
clutch. The paper in the multipurpose feeder is picked up one sheet
at a time.
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Service Manual