@gunrunnerjohn posted:The reverse board is a cheap component, I'd just replace it. If you're looking for suspect components, I'd say the four NPN power transistors would be my top suspects. That 2SD880 is fairly low rated for the task, and a motor stall can cook them.
I have one of those boards from an upgrade if you need a replacement.
Actually, out of curiosity, what was the upgrade you did? Rather than just replace like-for-like, it would be cool to update this thing to at least have a bell and horn, if the cost gap isn't too huge and the swap isn't too complex. Objective is to run it in conventional mode only.
