Step1: Turn on your F192 printer, connect the printer to your computer with the USB cable from accessory box.
Step2: Double click the below firmware updater, see below photo:
Use a screwdriver or some tools to press the reset button which on the right side of the printer, and DO NOT RELEASE.
Click the “update” button AND release the reset button IMMEDIATELY. Now you will see uploading, see below photo.
Wait until the upload is completed：
After all this done, go back to the screen and click the “restore factory”, then shut down your printer. After a few seconds, restart your printer. Now resetting process is finished!