HP Color LaserJet Professional CP5220 Service Manual - Page 59
Tray 1 (MP tray) paper pickup,
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force is always applied to the cassette separation roller, so the weak rotational force of the pickup roller is not enough to rotate the separation roller. Therefore, the separation roller holds back any multiplefed sheets, and one sheet of paper is fed into the product. Figure 1-35 Cassette multiple-feed prevention CST Pickup roller CST separation roller Print media Lifting plate The separation roller does not rotate Tray 1 (MP tray) paper pickup The operational sequence of the MP tray pickup is as follows: 1. The DC controller rotates the pickup motor when it receives a print command from the formatter. 2. As the MP tray pickup solenoid is driven, the MP tray pickup roller rotates and the lifting plate moves up. 3. The MP tray pickup roller picks up the paper. 4. The MP tray separation pad removes any multiple-fed sheets and one sheet of paper is fed into the product. ENWW Pickup, feed, and delivery system 47