OK... if there is a voltage regulator.. I can see it gets a little warm....
I did once entirely forget a Regulator and flew one of the 14 channel 2.4 ghz FASST Rx's on 8.2 volts direct... in a plane with 9 servos and 4 ESC's... about a dozen flights... without difficulty...
(I have heard the Rx's will run on up to 20 volts... but you didn't hear that from me!!!
)
I think that if the issue has merit, then FUTABA Should (And will) post necessary information... but they can't issue a bulliton EVERY Time someone thinks they have a problem....
There are 72,412 Radio Control Topic Websites with Forums in the US alone... there is all kinds of info, both good and bad... rather truthful and "Mistaken" that can and does get related on these forums...
The over heat does sound like it has merit... but that opinion is based on a few other pilots experiance..... Not my experiance... It is in the Best interest of FUTABA to investigate this and make it right and I am sure they will....
Let me tell you all a true story.....
Back in 1974, (Before the Lemon Law)...there was a family that bought a brand new Chrysler LeBarron. They loved their new car....
Every nite after dinner, ... it was their habit to drive to the local Krogers Grocery and buy a half gallon of ice cream and take it home and have a little party with the kids before bed time.... well... occasionally.. the car would not restart after they came out of the store with their ice cream... and this went on for months.... only occasionally.... and then... one of them noticed that this only happened when they bought Vanilla Ice cream.... yeah... no kidding... only when they bought vanilla Ice Cream!!!
So.. Chrysler Le Barrons would not start if you bought Vanilla Ice Cream!!!!
Well.. some investigation revealed what was happening.... can you guess????
It turns out... that the store kept the Vanilla Ice Cream in Freezers by the Cash registers... so when they purchased the vanilla... they didn't have to walk to the back of the store and then return to the front to pay... they simply grabbed the Vanilla, walked 30 feet to the cash register and paid... and then returned to their car which would not start.....
Had they chosen Rocky Road, Butter toffee nuget crunch or Chunky Cherry Squirrel Sherbet, they would have had to walk to the main freezers at the back of the store and then walk back to the registers at the front of the store thus taking about 6 minutes longer....
THAT WAS THE KEY!!!
It wasn't the vanilla ice cream, it was the difference in time.... apparently the Carb did a vapor lock thingy, and the extra time used to get flavors other then vanilla gave the car enuff time to resolve this condition....
So my point is...
I forgot...
well.. OK.. I remember....
listen to the experiance shared here... try to take measures to keep suitable air going over the Rx to NOT get that hot, but the sky is not falling!
Exercise Caution... but don't panic!
I truly hope no one else has this issue...