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96 Theory of operation Q2431-90912
Envelope feeder pickup and feeding
In the envelope feeder, the envelope sensor (PS901) detects the presence of envelopes and the
envelope-size sensor (PS903) detects the width of the envelope. The envelope pickup motor
(M901) drives all of the rollers in the envelope feeder.
When the DC controller PCA sends a print command the main motor (M101) in the printer begins
to rotate. After the main motor initial rotation phase is completed, the scanner motor begins to
rotate. As the scanner motor rotates, the envelope pick-up motor (M901) begins to rotate to drive
the pickup roller, feed roller, and separation roller, and an envelope is picked up.
The separation roller removes any unnecessary envelopes and the envelope travels to the
printer. The registration assembly corrects any skew. The envelope travels through the printer
paper path and is delivered to the output bin.
Figure 28. Envelope feeder pickup and feed diagram