HP LaserJet Pro CM1415fnw Color Multifunction Printer - Manual (Page 215)

5. Gently rock the print cartridge from front to back
to distribute the toner evenly inside the
cartridge.
6. Remove the orange, plastic shield from the
bottom of the new print cartridge.
7. Do not touch the imaging drum on the bottom
of the print cartridge. Fingerprints on the
imaging drum can cause print-quality
problems.
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