i do have some spare NCT3012S which came from digikey when i had the same problem.
On Fri, Mar 24, 2017 at 4:30 PM, Patrick Mulder <[email protected]> wrote: > Thanks! Yes, i could measure the voltage out of U35 is 0V with input 5V, > so, indeed it's the problem. > > One sub problem is actually sourcing the Nuvoton part: > > http://media.digikey.com/pdf/Data%20Sheets/Nuvoton%20PDFs/ > NCT3012S_RevA0.pdf > > I see Nuvoton is a Taiwanese company; trying to get in touch with a local > supplier. > > > On Fri, Mar 24, 2017 at 11:57 PM, Douglas Kryder <[email protected]> > wrote: > >> yes, it is U35 which goes bad. it takes some soldering skills to replace >> it. >> >> On Fri, Mar 24, 2017 at 1:54 PM, Krau, Michael P < >> [email protected]> wrote: >> >>> If I remember correctly, (from back in the early days, when this was a >>> more common event): >>> >>> >>> >>> The schematic page 22 is of more value. I believe when 12vts is >>> applied, the chip U35 was the first (and usually only) part to go south. >>> >>> >>> >>> Though there should be some discussion of this in earlier threads (about >>> 2 + years ago). >>> >>> >>> >>> Sincerely, >>> >>> >>> >>> Michael Krau >>> >>> >>> >>> *From:* elinux-MinnowBoard [mailto:elinux-minnowboard-bou >>> [email protected]] *On Behalf Of *Patrick Mulder >>> *Sent:* Friday, March 24, 2017 1:04 PM >>> *To:* [email protected] >>> *Subject:* [MinnowBoard] repair minnowboard power supply >>> >>> >>> >>> Hello, >>> >>> >>> >>> unfortunately, I applied 12V instead of 5V on the DC jack. >>> >>> >>> >>> Now, only 1 of 2 diodes is lightning up. >>> >>> >>> >>> I am looking at: >>> >>> >>> >>> http://wiki.minnowboard.org/images/b/bd/Minnowboard_Turbot_X205_Sch.pdf >>> >>> >>> >>> p. 29: >>> >>> >>> >>> 5 V DC --> NMOS and Switching supply . Not sure where to look for the >>> broken IC from this. What could I do to repair the board? >>> >>> >>> >>> Thanks a lot! >>> >>> >>> >>> Patrick >>> >>> >>> >>> _______________________________________________ >>> elinux-MinnowBoard mailing list >>> [email protected] >>> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard >>> >>> >> >> _______________________________________________ >> elinux-MinnowBoard mailing list >> [email protected] >> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard >> >> > > _______________________________________________ > elinux-MinnowBoard mailing list > [email protected] > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > >
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