![background image](https://i.printerdoc.net/HP LaserJet Pro MFP M521 series/en/HP LaserJet Pro MFP M521 series_en049.png)
Toner-cartridge storage
Do not remove the toner cartridge from its package until you are ready to use it.
CAUTION:
To prevent damage to the toner cartridge, do not expose it to light for more than a few
minutes.
Toner-cartridge storage
Do not remove the toner cartridge from its package until you are ready to use it.
CAUTION:
To prevent damage to the toner cartridge, do not expose it to light for more than a few
minutes.