Re: [NTLK] MP2x00 hot in the back: anyone got that problem?

From: Johannes Wolf (jwolf_at_xe.estec.esa.nl)
Date: Mon Feb 18 2002 - 03:14:43 EST

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In reply to: Paul Guyot: "Re: [NTLK] MP2x00 hot in the back: anyone got that problem?"
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So I really think that this was a LatchUp effect.
I know that we are very careless (including me) connecting things to our
Newt while it is up and running.
The safe way would be to switch off before connecting anything.
Ignoring that we all risk damaging the Newt.
And this was what I mentioned before to be one more advantage of the
SER-001, because if the serial interface will be damaged, only the SER-001
board will be damaged, thus the Newt interface is protected by the SER-001.

Johannes

> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Paul Guyot
> Sent: Saturday, February 16, 2002 8:22 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] MP2x00 hot in the back: anyone got that problem?
>
>
>
> >So a good idea would be topower the Newt in open condition.
> >Dont worry, no problem as long as you place the Newt on a flat
> and isolating
> >pad, I did it a lot of times.
>
> I did this, and the Newton was running and the CPU, Voyager and SER
> board and everything else was cold as usual. My Newton has been
> continuously running since and it is still cold.
>
> >What I can imagine is that the SER-001 interface chip had a so called
> >latchup.
> >During latchup the involved chips heat up a lot.
> >If you are lucky, the chip survived.
> >But you can check this easily by testing the functionality of
> the SER-001.
>
> It works fine. Nothing seems damaged, my Newton is fully functional.
>
> >Hope this was not too complicated and that it will help.
>
> Thanks for your help, Johannes. Everything is back to normal, which
> is rather weird (I recall now why I am rather a software guy).
>
> Paul
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Next message: Johannes Wolf: "Re: [NTLK] broken newton?"
Previous message: Markus Stöbe: "Re: [NTLK] my little wish"
In reply to: Paul Guyot: "Re: [NTLK] MP2x00 hot in the back: anyone got that problem?"
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