MMM took out rx and servos

[BrianG]

Originally Posted by secondgear

...The RX was burnt out from over voltage. Both servos had failed.

The only thing I can see that caused this is the BEC failing and sending pack voltage through the rx to the sevos. Assuming the rx took the voltage, the servos failed and drew more current which took out the rx...

That sucks. That happened to me too, except it was an external BEC. I was able to fix both the rx and servo though.

If the actual rx circuitry survived the overvoltage, then the rx's PCB traces connecting the power and/or ground pins may have simply burnt from overcurrent. If this is the case, try soldering a wire across all the power (middle) pins and another wire across the ground pins.

On the servos, I assume you are using stock Trx servos? Probably not worth fixing, but sometimes you can pick up the driver board for much less than a whole servo. Then it's just a matter of removing the old board and soldering in a new one. In my case, it was a $100+ servo that blew so it was worth it for a new driver board for $26.

Unfortunately, this type of failure can happen to ANY switching BEC. It's just how they work. Hope things turn out good for you and are able to get things fixed with minimal cash outlay!