7Remove the toner cartridge from its package and gently shake it from side to side to distribute the toner. Then carefully peel the white plastic tape from the bottom of the toner cartridge.
8With the ridged side facing up and the gray lever on your right, insert the toner cartridge into the image drum unit. Slide the left end of the cartridge in first, then lower the right end into place.
Warning: Be careful not to insert the toner cartridge backwards into the image drum unit.
9Once the toner cartridge is in place, push the gray lever all the way forward to secure it and release the toner.