Pins broken in sockets?

From: Bill Sudbrink <bill_at_chipware.com>
Date: Tue Oct 19 15:28:44 1999

> >> 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:
> 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
You know, you're right. It is only the TI chips. The WD FD1771B
is clean and shiny. So are the single Fairchild, RCA and National
Semi chips on the board. I had assumed that those had been replaced
later, but the 1771 probably was not.

Bill
Received on Tue Oct 19 1999 - 15:28:44 BST