19 Oct
1999
19 Oct
'99
5:38 a.m.
At 02:25 PM 10/19/99 -0400, Bill wrote:
Hmmm, another Cromemco board bad this way? I
found the pins not only
tarnished black but corroded through on a 16KZ, usually in a group on the
same IC. The bad chips were all made by TI. Maybe there was some chemical
residue from Cromemco's wave soldering that did this? Anyway, I had to use
tweezers to remove the end narrow portion of the pins from the sockets.
-Dave
Any idea what
causes the pin breakage described below?
> So far, I've found 5 chips with pins broken down inside the sockets.
> Fortunately, I was able to remove the pins from the sockets.
Not a clue. In my recent/ongoing IMSAI restoration, the
Cromemco 4FDC floppy disk controller had three chips with
one pin each broken in the socket. Each was broken where
the pin narrows down. Bad ASCII art: