Friendly reminder to any 5620 / BLIT owners...
ethan.dicks at gmail.com
Mon Aug 10 19:48:58 CDT 2015
On Mon, Aug 10, 2015 at 4:41 PM, Ian Finder <ian.finder at gmail.com> wrote:
> The battery in the teletype DMD 5620 is mounted in a very fatal position,
> and does indeed leak, as I learned this weekend.
> If you have not removed it, I would get on that now.
Thanks for the tip. I just checked the Blit I received this summer,
and the battery is thankfully intact. Zero voltage, but no leaks
> In fact, if you still have batteries in anything, you might be doing it
> wrong... ;)
I lost an A4000 because I _thought_ I pulled the battery, but I was
wrong. :-( It might be fixable, and I will try, but I'm expecting to
have to replace it.
Now I just need to find out why this Blit doesn't display anything
when I power it on. The motherboard seems typical of AT&T products -
a massive grid of square-pad-vias and a number of
proprietary/private-label ICs. The firmware is on 8 27128s. In case
I might have bitrot in 30-year-old EPROMs, does anyone have backups of
the firmware I can test/reburn with? The RAM is 1MB of soldered
Hitachi 50256s. Probably OK but no easy way to test them.
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