> From: James
>
> You can desolder the sliders off the board and check them
> with a multimeter easy enough. Make sure all connections are tight.
>
> Honestly, I've seen this before where a few sliders were dead
> yet the connections and sliders tested good. My fix involved
> replacing the 4052 multiplexers (going from memory) impacting
> the non working sliders. I've seen 'channels' on these
> multiplexers go out leaving some sliders working and some
> not. The 4052's are CHEAP and are still made in qty.

You can actually check the sliders in place, because they have static 5V
across them. Just hook a meter between ground and the wiper, and see if the
voltage goes from 0 to 5V as you vary the pot. It's hard to identify a noisy
pot with a meter, but you can easily see if it's totally broken. If you get
0 to 5V, but no effect on the sound, then change the CMOS switch. (They're
4051, although a more modern 74HC4051 will work just as well.)

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...