Hi, I have an Everyoung 88800F treadmill and am having trouble calibrating the speed on it, ever since I replaced a burnt fuse on it. I have the manual and am following the steps to calibrate it. But the speed slow and fast buttons which are supposed to set the belt speed while calibrating, actually set the distance. So, I'm not able to change the belt speed. Has anyone else faced this problem and know how to fix the issue.