19 Oct
1999
19 Oct
'99
9:25 a.m.
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:
| |
| |
\ /
\ /
| | < BREAK HERE
| |
\ /
-
Maybe they were stressed when originally inserted and
additional thermal stress finally broke them. Also, in
my case, all of the exposed metal on all of the pins on
all of the chips was tarnished, almost black. Maybe the
tarnishing process had something to do with it.
Bill Sudbrink