HP Color LaserJet Enterprise M855 Printer series - Manual (Page 121)

5. Hole punch models only: Lift the hole-punch
unit.
6. Hole punch models only: If paper is jammed in
the bottom of the hole-punch unit, carefully
remove it.
7. Hole punch models only: Close the hole-punch
unit.
NOTE: Ensure the arrows on the hole punch are
positioned as shown in the graphic.
ENWW Clear jams 113