[SunRescue] Broken 3/60 board

[Maarten Deen]

Tim Hauber:

> >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:

> Do you have any idea why the chip let out its magic smoke?  As a general

No idea. I got it from a collegue when I quit my last job. He only 
said it didn't work (and with the chip looking like that I believed him. 
It looks like someone took a small-tip soldering iron and pushed 
inwards).

> 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.

Peter Koch told me it's the ethernet's BNC connector driver. Maybe 
someone put 220V AC on their 10-base-2?
Anyway, I'll plug it into my 3/50 an try it out like this. To tell the 
truth, I can't really recall having tried it myself.

Maarten

--
Maarten Deen                                           +31 (0)77 3076879
mdeen at xs4all.nl                              http://www.xs4all.nl/~mdeen