I was hoping for some replies, but I guess I'll have a go at it and try to figure this out.
I'll document what I have tried and ask for opinions as I go along.
Does anyone happen to have a schematic of the SDS9 they would be willing to share?
I discovered after reading the manual, you need to turn the pots lock to lock in order to see a change.
That seems to work when the pots are working properly.
I bought some Deoxit and tried cleaning the pots from topside.
Took a while, but several of the flaky ones started working pretty well.
I still have at least 3 that I know of that do not want to work properly.
I already replaced one last year due to a broken shaft.
I think i may just go ahead and replace all the pots so I can rule that out.
The Digi Key PN for the pots I will be using is: 987-1572-ND
The cheapest knobs I found for these pots is:226-1104-ND
They have them in black and clear anodize. Too expensive though and hope to find something cheaper.
Maybe if I find a pot with a different shaft, I can find some plastic knobs.
I still have an issue with low volume on channels 4 and 6. Without a schematic, I really have no good ideas on why this could be. I kind of doubt the pots have anything to do with it. The output level pots for those channels seem to work smooth and you can hear a gradual increase in output as you turn the knobs. The max of both channels, is just too low. I have to have the other channels on about 20% to match 100% of these two.
Feel free to chime in with any part numbers or ideas.
Thanks,
Rich