[MinnowBoard] repair minnowboard power supply

[Douglas Kryder]

i have 4 left and would like to keep 2 so i can send you 2 if that would
help you. just email me a shipping address and i will put them in the mail
tomorrow.   dkryder at gmail.com

On Fri, Mar 24, 2017 at 5:15 PM, W Paul Mills <W.P.Mills at wpmills.com> wrote:

> <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.patrick at gmail.com <mailto:mulder.patrick at 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 <dkryder at gmail.com
> >     <mailto:dkryder at 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.krau at intel.com <mailto:michael.p.krau at 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-bounces at lists.elinux.org
> >             <mailto:elinux-minnowboard-bounces at lists.elinux.org>] *On
> >             Behalf Of *Patrick Mulder
> >             *Sent:* Friday, March 24, 2017 1:04 PM
> >             *To:* elinux-minnowboard at lists.elinux.org
> >             <mailto:elinux-minnowboard at 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 at lists.elinux.org
> >             <mailto:elinux-MinnowBoard at 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 at lists.elinux.org
> >         <mailto:elinux-MinnowBoard at 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 at lists.elinux.org
> >     <mailto:elinux-MinnowBoard at 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 at lists.elinux.org
> > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
> >
>
>
> --
> /**********************************
> * W. Paul Mills - Topeka, KS, USA *
> **********************************/
> _______________________________________________
> elinux-MinnowBoard mailing list
> elinux-MinnowBoard at lists.elinux.org
> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.elinux.org/pipermail/elinux-minnowboard/attachments/20170324/9a64eb8d/attachment-0001.html>