<https://www.arrow.com/en/products/nct3012str/nuvoton-technology>
On 03/24/2017 07:05 PM, Douglas Kryder wrote: > 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 > <mulder.patr...@gmail.com <mailto:mulder.patr...@gmail.com>> 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 > > <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 <dkry...@gmail.com > <mailto:dkry...@gmail.com>> 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 > <michael.p.k...@intel.com <mailto:michael.p.k...@intel.com>> 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-boun...@lists.elinux.org > <mailto:elinux-minnowboard-boun...@lists.elinux.org>] *On > Behalf Of *Patrick Mulder > *Sent:* Friday, March 24, 2017 1:04 PM > *To:* elinux-minnowboard@lists.elinux.org > <mailto:elinux-minnowboard@lists.elinux.org> > *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 > > <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 > elinux-MinnowBoard@lists.elinux.org > <mailto:elinux-MinnowBoard@lists.elinux.org> > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > <http://lists.elinux.org/mailman/listinfo/elinux-minnowboard> > > > > _______________________________________________ > elinux-MinnowBoard mailing list > elinux-MinnowBoard@lists.elinux.org > <mailto:elinux-MinnowBoard@lists.elinux.org> > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > <http://lists.elinux.org/mailman/listinfo/elinux-minnowboard> > > > > _______________________________________________ > elinux-MinnowBoard mailing list > elinux-MinnowBoard@lists.elinux.org > <mailto:elinux-MinnowBoard@lists.elinux.org> > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > <http://lists.elinux.org/mailman/listinfo/elinux-minnowboard> > > > > > _______________________________________________ > elinux-MinnowBoard mailing list > elinux-MinnowBoard@lists.elinux.org > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > -- /********************************** * W. Paul Mills - Topeka, KS, USA * **********************************/ _______________________________________________ elinux-MinnowBoard mailing list elinux-MinnowBoard@lists.elinux.org http://lists.elinux.org/mailman/listinfo/elinux-minnowboard