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Unread 23-01-2015, 14:08
crake crake is offline
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Re: RoboRIO Red Power LED

Quote:
Originally Posted by diverson View Post
I'll try switching the jumper, thanks for the tip. Does the jumper switch 3.3V into all of the normally 5V header pins? I don't see it mentioned in any of the documentation.

Are there any test points or anything on the board that would help me figure out if the 5V regulator has been damaged?
Test points will be coated with conformal coating, so that will be difficult to check, but you can check the jumper - you should see 5V on one pin, 3.3V on the other. That is an undocumented jumper so you can switch from 5V to 3.3V at some point in the future (world is moving away from 5V circuits) on DIO power. BUT the 5V on SPI, etc. wouldn't change, so now that I've thought through this some more, if you're not seeing 5V at any of the marked locations then the jumper debug won't tell you anything new (unless you found a piece of wire there shorting it to ground or something)