HP TopShot LaserJet Pro M275 MFP - Manual (Page 145)

Replace the print cartridges
CAUTION: Do not remove print cartridges from their packages until you are ready to use them.
1. Raise the camera arm to the fully open
position.
2. Remove the capture stage and set it aside.
3. Open the print-cartridge door, and identify
which print cartridge is in the opening.
ENWW Replace the print cartridges 135