16 Dec
2009
16 Dec
'09
1:59 p.m.
Thirded. ;) I've replaced my share of these chips as well.
________________________________
From: Ethan Dicks <ethan.dicks at gmail.com>
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Sent: Wed, December 16, 2009 3:42:59 PM
Subject: Re: trs-80 model II trouble--problem solved..and follow-up
On Wed, Dec 16, 2009 at 3:21 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
Absolutely!
I second that. I've replaced many 2114s over the years. One
commercial board I worked on in the past (the COMBOARD-I), had a field
of 32 chips. Memory failures were one of the most common reasons
boards ended up back on the bench. I learned to cleanly unsolder
parts from 4-layer boards because of them (clip the leads at the IC
body, then extract the pins one-by-one). I got lots of practice.
-ethan
Thanks to everyone's advice. You were all right (as was my original
suspicion)...that it was the video memory.
Well done!/ Repairing this old hardware can be fun, and it's a great
feeling when it works again (or at least is is for me). So...a couple
of questions:
1) How can I get just 1 2114...
Get more 2114s :-). In my experience it's one of the most unreliable
chips there is, to the extend that I've replaced them in just about
everything I've got that uses 2114s at some time or another.