HP LaserJet Pro M521 Multifunction Printer series - Manual (Page 48)

Toner cartridge
● Toner-cartridge view
● Toner-cartridge information
● Replace the toner cartridge
Toner-cartridge view
2 3
1
1 Imaging drum
CAUTION: Do not touch the shutter or the surface of the roller. Doing so can damage the cartridge.
2 Memory chip
3 Pull tab for the sealing tape
34 Chapter 3 Parts, supplies, and accessories ENWW