HP HP CLJ2840, 2820 Replacement toner Cartridge method
1, push the scanner, release the button to open the scanner assembly.
2, open the top cover, lift the imaging drum vertically, and then remove the cartridge to replace the toner cartridge.
3. Ensure that the correct print cartridge slot is in the loading/unloading position, if the correct print cartridge slot is not in the loading/unloading position, close the top cover and scanner assembly, and press rotate carousel (rotating conveyor belt) until the correct print cartridge slot is in the loading position.
4. Pinch the handle on the printed toner cartridge, pick up the toner cartridge and turn the drum towards yourself, and put the toner cartridge down vertically into the machine until it is firmly seated and if you need to replace the other toner cartridge, close the top cover and scanner assembly, press rotate carousel (rotating conveyor belt), and then restart the operation
5, close the top cover, and then turn off the scanner assembly.