5With 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.
6Once the toner cartridge is in place, push the gray lever all the way forward to secure it and release the toner.
7Using the cleaning wipe provided in the package with your new toner cartridge, gently wipe back and forth across the full length of your fax machine’s LED array.