HP Color LaserJet Enterprise M751n Laser Printer - Manual (Page 81)

NOTE: Information about recycling used imaging drums is in the imaging drum box.
Remove and replace the imaging drums
1. Open the front door.
2. Rotate the blue lever in front of the imaging drum
to the left.
3. Grasp the handle of the used imaging drum and
pull out to remove it.
ENWW Replace the imaging drums 71