An should appear on the display, indicating you have entered Service Mode. 2. Using Official Maintenance Software
Once you've downloaded the Canon MF3010 Service Control Tool, follow these steps to install and use it: canon mf3010 service control tool download link
has a compact display that uses letter codes to represent different service functions. You don't always need a software download; many "service" actions are built into the hardware Cleaning Mode ("C"): If you see black spots or smears, press the button until appears, then press the green An should appear on the display, indicating you