All-in-one parts Before using the all-in-one, familiarize yourself with its parts. HP LaserJet 3050 all-in-one parts Front view 5 4 6 3 2 7 8 1 ENWW All-in-one parts 5 1 Tray 1 2 Priority input slot 3 Output bin 4 ADF output bin 5 ADF input tray 6 ADF media lever 7 Control panel 8 Cartridge-door release