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--- In chromapolaris@yahoogroups.com, "bkuris" <Bkuris@g...> wrote:
>
> The battery backup protects also includes trim on VCAs and touch
> response of the keys. That info is a pain to recalibrate.
>
> You want to replace the caps labeled Polyprop. that hang off of the
> sample/hold latches (ZX01 and ZX02).
>
> The Polaris Mother board is quite large and similar in complexity to
> other 80's computers-- the 2nd time I replaced the caps, rather then
> remove the board I just added extra solder to the leads of the
> existing caps and used reflowed them out carefully. Afterwards I
> used a solder sucker to the clean the holes and then carefully
> soldered in new caps (with a bit of extra lead to ensure a good
> joint). The solder will wick down into the holes.
>
> If you want you can isolate the offending voice(s) to narrow down the
> replacement to just a few caps (use voice disable controls) but
> sooner or later all will go.
>
> -Ben
>