Epson HX-20, TRS-80 Model 100 Capacitor Kits

[Alexandre Souza]

never, EVER use a drill. add more solder and keep heating the corroded
solder, it will eventually melt and mix with new solder.

using a drill will destroy the board.

Enviado do meu Tele-Movel

On Tue, Aug 28, 2018, 03:38 Marvin Johnston via cctalk <
cctalk at classiccmp.org> wrote:

> Since I have at least four Model 100 and HX-20s, I've decided to just
> replace all the aluminum electrolytics before repair becomes much more
> difficult. So far, I see the project as fairly easy depending on how bad
> the corrosion from the leaking caps is.
>
> Is anyone interested in buying a kit or two of the capacitors? I'm
> guessing buying the parts from DigiKey at low quantity prices will
> result in about $3.50 or so for the bag of about 13 capacitors. US
> postage will probably run a couple of dollars or so, but I can also
> bring them with me to VCFMW. I'll be ordering what I need unless I hear
> others might want the kits as well.
>
> On a similar topic, has anyone given up on cleaning out the corroded
> plated-Thru-Holes, and just soldered on some SMD caps? If so, how did it
> work out?
>
> Finally, just some observations on the corrosion. I finally found some
> information about the corrosion caused by leaking aluminum caps. It
> sounds like the leaking fluid, besides possibly damaging the copper
> traces, also does something to the solder in the PTH such that a
> soldering iron won't melt the solder. Right now, the solder doesn't want
> to melt so I will use a pin vise and about a number 62 drill or so to
> hand drill out the PTH solder.
>