HP Color LaserJet Professional CP5220 Service Manual - Page 60
Tray 1 (MP tray) last-paper detection,
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The MP tray media presence sensor detects the presence of print media on the MP tray. Figure 1-36 Tray 1 (MP tray) paper pickup DC controller Pickup motor M5 MP tray pickup solenoid SL2 MP tray pickup roller PS2: MP tray media presence sensor Lifting plate MP tray separation pad Tray 1 (MP tray) last-paper detection The product detects whether the print media on the MP tray is the last sheet during continuous printing to prevent toner contamination on the photosensitive drums and the ITB. The product attempts to form the next image before the DC controller detects a media absence because the paper path between the MP tray media-presence sensor and the registration roller is short. To prevent the photosensitive drums and the ITB from being contaminated with toner, the last-paper sensor detects the last-paper. The MP tray last-paper detection roller rotates when the last-paper is picked up. 48 Chapter 1 Theory of operation ENWW