Samsung ML-4512ND-XAA - Manual (Page 61)

61 3. Maintenance
Replacing the toner cartridge
Click this link to open an animation about replacing a toner
cartridge.
When a toner cartridge has reached the end of life, the machine will
stop printing (see "Available supplies" on page 55).
1 Open the front cover and pull the toner cartridge out.
2 Remove the new toner cartridge from its bag.
3 Thoroughly shake side to side the cartridge five or six times to
distribute the toner evenly inside the cartridge.
If toner gets on your clothing, wipe it off with a dry cloth and
wash clothing in cold water: hot water sets toner into fabric.