Check? I dont know
Why? 9241 were discontinued many years ago so they reprint them to make interface look like genuine V3 with the same functionality
1st they used lm393 and reprinted as 9241 but interface had no full functionality
Now they are using l9637 and interface is finally working good
Some people reported u702, u705 or other chip was damaged
But I 1st would try buying 2x L9637 and replace them, they are cheap
Bookmarks