- 121 -7. Maintenance• If you have to dispose of used toner cartridges, put them into polyethylene bags or other container, and be sureto follow the regulations or instructions of your local government.• When replacing only the K toner cartridge, refer to "For K (black) Toner Cartridge Only".1 Prepare new toner cartridges.2 Insert your finger into the recess on the right side of the machine and pull thefront cover open lever (1) to open the front cover (2) forward.For C (cyan), M (magenta), Y (yellow) Toner Cartridge
