Dead Sega SC3000H
Mike van Bokhoven
mike at fenz.net
Tue Oct 12 05:34:07 CDT 2010
I've been working on a Sega SC3000H:
It seems to have the common problems that afflict these. Firstly, the
7805 regulator was dead. I pulled it and gave the machine 5V from an
external supply, and it ran fine - apart from what looked like a
horrible RAM fault. I can see it's trying to do something sensible, but
the display is corrupt. So, I tried the next test for obvious RAM
failure - are any of the RAM ICs getting unusually hot? Seven were
barely warm, but one is almost too hot to touch.
Now, this is annoying because I don't want to spend a great deal of cash
on this machine, but I'd really like to get it going. I have two questions:
- Am I jumping to conclusions re the faulty RAM? The ICs aren't
socketed, can anyone suggest any worthwhile tests?
- Does anyone know of somewhere I can get a MCM4517 P15 or equivalent,
nice and cheap? One problem - I'm in New Zealand.
I'm a software guy really, but I do enjoy getting stuck into the
hardware from time to time!
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