What is the process for replacing a toner cartridge?

To replace a toner cartridge, lift the scanner assembly and open the top cover. Remove the used cartridge and then remove the new one from its packaging; distribute the toner by gently rocking the cartridge without touching the shutter or roller surface. Align and insert the new toner cartridge onto the tracks inside the product until it is firmly seated before closing the top cover and lowering the scanner assembly.