[Elphel-support] Elphel 353 no connection after RTSP interuption

[Oleguer Nogués Correig]

Dear all, but particularly to Andrey,

I just would like to comment the fact that just one year ago I saw a very
similar failure in one instrument I had designed. This instrument
had an Ethernet interface, too, which was implemented with the Ethernet
interface of an Altera FPGA development board (2s60 Nios II devkit).
That board was inside a scientific instrument, custom built, and the
instrument was placed during months inside a small house at the
top of a hill, for scientific observation purposes. Seems that the
environment on that place was prone to ESD, and one day the instrument
just did not respond any more: exactly the same failure as hugo is
describing. So to summarize, I wouldn't say that "those chips are rather
immune to ESD". I would say they are actually sensible at some level, and
even though this failure might not be the most frequent,
 this failure may appear specially in environments in which ESD are more
frequent, or stronger.

Kind regards to all,

Oleguer


2014-07-29 18:56 GMT+02:00 support-list <support-list at support.elphel.com>:

> Hugo, I've never seen such failure before, and such chips are rather
> immune to ESD, it is also connected through the transformer to the network
> connector, not directly. And the failure is definitely in the chip itself,
> not in the connection to the CPU.
>
> I did not have the replacement chip, now our contract manufacturer is
> building more boards and are ordering components, we'll try to fix the board
>
> Andrey
> ---- On Tue, 29 Jul 2014 03:19:45 -0700 hugo chauvet  wrote ----
>
> >Hi Oleg,
> >
> >
> >Do you have any idea why the network chip burnt ?
> >Please let us know when you send back the camera with the new network
> chip.
> >
> >
> >Regards,
> >
> >
> >Hugo.
> >
> >
> >
> >2014-07-21 23:35 GMT+02:00 Oleg <support-list at support.elphel.com>:
> > Hi Hugo,
> >
> >Sorry, it took me to long to answer.
> >Yes, we received the camera.
> > The network chip on the system board doesn't work - burnt. It is
> possible to replace it.
> >
> >
> >
> >Best regards,
> >Oleg Dzhimiev
> >Electronics Engineer
> >phone: +1 801 783 5555 x124
> > Elphel, Inc.
> >
> >
> >
> >
> >
> > _______________________________________________
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> >Support-list at support.elphel.com
> >
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
> >
>
>
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