View Full Version : DC input wrong polarity HELP

11-21-2011, 08:43 PM
I accidently plugged 28vdc incorrectly into some SSRDC boards.
Now they dont work guessing I blew something on the board, as I dont have time right now to diagnose fully has anyone got any idea what would have gone pop ?

Yes Im being lazy I know but still have a tonne of display items to get up

11-21-2011, 09:08 PM
Mostly likely the voltage regulator, possible the FETS and the OPTO.

When you connect the 28v the correctly, is there 5V on Pin16 of the OPTO? use the neg (pin2) of TB0 as your reference.