HP Pro 4300 C9H70UT C9H70UT#ABA manual Envelope feeder pickup and feeding

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

96 Theory of operation Q2431-90912