On Mon, 19 Apr 1999, Ethan Dicks wrote:
> I wish I had one of the stereo inspection microscopes that I used when I
> worked on the factory floor at a Lucent plant in Columbus. It has a sliding
> base and an optional pneumatic pedal to fix the jig in place. We used
> it to inspect solder fillets on SMT edge connectors for circuit packs (the
> AT&T name for a PCB) for phone switches. If I had one of those for a month,
> I could probably get the view necessary to attempt to thread hair-fine wire
> through the cores. I do have a Weller temp-controlled iron to avoid scorching
> the PCBs and I do have a 1/64" tip for it (normally, I use a 1/32" tip for
> general SMT rework). The only hard problem I have is how to test the memory
> without assembling the entire plane first (due to the interconnections between
> the diode matrix boards and the individual core plane PCBs).
I have a similar device that was used for inspecting ICs. Its basically a
microscope with a fine adjustment platform, and it actually has a scribe
for etching on the surface, although I don't know what purpose that would
serve.
I assume you are thinking to replace the wire strand completely, and not
attempt to solder the two broken ends together?
Sellam Alternate e-mail: dastar_at_siconic.com
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Received on Mon Apr 19 1999 - 16:55:17 BST