I now have opened my 800 too and spotted a version with solder pads, but no battery. Richard (www.analog.no) says, one should remove C87, C88 and C23. After examining the schematics at this point, I cannot imagine why this components should be removed, since the two condensors help avoiding spikes and losing memory when changing the battery and the diode protects the battery from being charged if the poly 800 is powered from the batteries in the compartment of the bottom. Or am I completely wrong there?
--- In korgpolyex@yahoogroups.com, "backshall1 \(dsl\)" <backshall1@...> wrote:
>
> Depending on the version, this Poly-800 may not have an internal battery at
> all. It would be on the CPU board between IC18 and IC19 if it has one. If it
> is really old, this will be just empty space. If it is a bit newer, it may
> have solder tabs where the battery would eventually go, but no battery. The
> last ones manufactured just before the Poly-800 II actually had a CR2032
> lithium cell soldered in there. I this is one of the earlier two types, it
> would need some small modifications to the power circuit to safely install a
> CR2032
>
> Don B.
>