Tom Clifton skrev:
The word we got from our Dell National Accounts rep was that there was a run of
contaminated electrolyte affectring several capacitor manufactures. Gee, go
figure QC issues in a country still painting toys with lead based paint...
Any way, I recently purchased a pile of low ESR caps from Mouser to fix five
machines from the junk pile at work to build more linux utility boxes.
(perhaps $40) Turned out being a lot harder than I had anticipated as the
internal ground planes on the Dell Motherboards made the old caps dogs to
remove, and the new ones very hard to solder back in without cold joints.
After the first one, I returned the others to the pile and picked up other
machines with good motherboards and bad hard drives or power supplies to get
the rest of the machines I needed.
Guess I failed rework-101...
You need to use a hot-air gun to pre-heat the whole PCB. By doing that
the heat-flow will be less as there is less of a temperature gradient.
The board needs to be made fairly hot... but after doing that, it is not
as hard to unsolder them, clean the holes and then solder the new caps in.
Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
