Thorsten Pörschke wrote:
> Hello David
>
> Thank you very much for your quick answer.
> I wanted to know which pcb (KAS, TKC, TSB1, eg.) you choosed to start with?
> Did you also overhaul the power supply and if which parts besides the cap.
> did you changed.
>
>
I don't remember what order I did the boards in. I did, however, do one
board at a time and made sure it was still working before I did the next
board. I did have a couple of solder bridges that took some time to
find, and generated really weird symptoms. You need to have a decent
multi-meter and simple oscilloscope, the schematics (mostly available
online - see Links), and an understanding of some digital and analog
electronics, because something will go wrong when removing/replacing
over a hundred 14 and 16 pin chips!
There's tons of detailed pictures I put on the site (Photos > CS80
renovation) as I did the work. The only thing on the power supply was
replacing all the caps (other than calibrating it). All 4000-series
CMOS chips were removed, sockets soldered in, bypass caps added, and new
chips put in. I also added larger caps for each board. I basically
followed Crow's website. The biggest help was buying a used
de-soldering station. It would have been crazy to try it with just a
spring-loaded solder remover. When I was done, I sold it (to the owner
of the Yahoo oldsynths group).
David