[SunRescue] Broken 3/60 board

[Tim Hauber]

rescue at sunhelp.org,Internet writes:
>Hi,
>
>since some time now I've got a 3/60 board which 
>is broken. The chip at U507 (grid location B2 or 
>thereabouts, just below the UARTs) has 
>physically burnt out. The label reads:
>
>     FDK
>   MD09S140
>     8841
> MADE IN JAPAN
>
>I don't know what this chip is for, I only know 
>that it won't work without it.
>Can someone help me out? I would like to get a 
>replacement so that I can get this board up and 
>running to give my 3/50 an upgrade.
>Who manufacutures this chip, and what P/N is it?
>
>Cheers,
>
>Maarten Deen

Do you have any idea why the chip let out its magic smoke?  As a general
rule a  normal chip in a socket (not a processor type thing) won't burn
out on its own, and there is a good chance that a replacement would also
poof.  I'd look for a cause before plugging a good chip in there, if you
can find the pinouts for the chip, at least check power supply voltages at
the socket.

Tim