Re: When 2114s fail

-----Original Message-----
From: Neil Bradley <nb@synthcom.com>
To: rasterlist@synthcom.com, <vectorlist@synthcom.com>
Date: Sat, 12 Apr 2003 10:40:33 -0700 (PDT)
Subject: VECTOR: When 2114s fail

>
> Sorry for the double posts to both lists, but I thought it might be
> relevant to both types of games (and in my case I'm troubleshooting a
> raster and a vector game).
>
> When 2114s fail, what types of failures commonly occur? Do they stick
> address lines? Data bus lines? Just flat out won't store information? My
> immediate problem is with a Defender and I can't quite tell if it's an
> address decoder problem or a RAM chip problem, and am trying to find a
> rational way to troubleshoot it.
>
> If you have any experience with the 2114s and can post the types of
> failures you've seen, that'd be great. Thanks!
>
2114 is static ram, defender uses 4116 dynamic ram.

4116 chips in defender when they fail usually get 2 hot to touch.
they usually fail because of problems with the -5v line anyway.
change the crimp-pins on the loom between the psu and the main pcb.

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Received on Sun Apr 13 00:54:01 2003