Canon DR-5010C - Manual (Page 14)

12 Before Using the Scanner
Removing the Protective Packing Materials
Remove all of the protective packing materials (marked
▼ in the diagrams)
before using the scanner.
1.
Remove the protective tape from the scanner.
2.
Slowly open the Document Feed Tray, then remove the protective tape.
Feed tray
3.
Hold the edge of the Upper unit as shown in the diagram, and slowly open it
until it stops.
Upper unit
CAUTION
The pickup roller is located in the middle of the Upper unit. Do not
hold the protrusion on the Upper unit when you open it. Doing so
may deform the pickup roller or cause a feeding error.