[NTLK] Tantalum caps

[jay stainbrook]

I believe it.  All that was left of the one I replaced was charred remains.
 
> Date: Fri, 25 Mar 2011 20:23:42 -0400
> From: zack112358 at gmail.com
> To: newtontalk at newtontalk.net
> Subject: Re: [NTLK] Tantalum caps
> 
> Tantalum camps don't typically go quietly. There's a lot of chemical
> energy in a tantalum. Lab I used to work for, we used tantalums for
> buffering switching supplies (which I presume is the same use as the
> Newton uses them for), and once or twice people have gotten the
> polarity reversed. Big fireball.
> 
> On 3/25/11, Forrest <newtonphoenix at mindspring.com> wrote:
> > Jay:
> >
> > An additional note--I also tried swapping in a good capacitor later on...and
> > I had the same problem as before. So, it likely does cause other unseen
> > damage.
> >
> > Thanks,
> > --Forrest
> >
> > Sent from my AT&T iPhone 4
> >
> > On Mar 25, 2011, at 8:04 AM, Forrest <newtonphoenix at mindspring.com> wrote:
> >
> >> Jay:
> >>
> >> I've had kind of a similar experience with capacitor C85....
> >>
> >> http://www.newtonphoenix.org/
> >>
> >> Look under "Newt Tech", then the "FrankenNewton" entry.
> >>
> >> Thanks,
> >> --Forrest
> >>
> >> Sent from my AT&T iPhone 4
> >>
> >> On Mar 24, 2011, at 11:02 PM, jay stainbrook <jaystainbrook at hotmail.com>
> >> wrote:
> >>
> >>>
> >>> Hi everybody.
> >>>
> >>> I got my hands on a dead 2100 for the case and some other plastic
> >>> goodies. But when i took a look at the board, there was an obviously
> >>> blown cap (C147). So I replaced it, thinking it was keeping the Newton
> >>> from powering up. But it stayed dead.
> >>>
> >>> So now I'm wondering - did my ham fisted soldering/de-soldering mess
> >>> something else up? Is it common for these caps to burst? Anyone ever
> >>> try to fix this?
> >>>
> >>> It would be kind of neat if this "parts" newton could be made to run.
> >>>
> >>> Jay Stainbrook
> >>>
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