Samsung ML-4551N - Manual (Page 43)

8.5
4 Hold the toner cartridge by the handle and slowly insert the
cartridge into the opening in the printer.
Tabs on the sides of the cartridge and corresponding grooves
within the printer will guide the cartridge into the correct position
until it locks into place completely.
5 Close the top cover. Make sure that the cover is securely closed.
Replacing the toner cartridge
When the toner cartridge is completely empty:
• Toner Empty appears on the display.
• The Status LED lights red.
At this stage, the toner cartridge needs to be replaced. For order
information for toner cartridges, see page 7.1.
1 Open the top cover.
2 Pull the toner cartridge out.
3 Remove the new toner cartridge from its bag.
Caution
• Do not use sharp objects, such as a knife or scissors, to open
the toner cartridge package. They might scratch the drum of
the cartridge.