This Pioneer RMX-1000 is one of two DJ controller that came in for repair. On this first unit one of the audio jack inputs were physically damaged that no plug could be inserted. The right fx switch was weak and all potentiometer were scratchy.
I replaced the jack with a spare part from Pioneer.
I fixed one button with epoxy glue.
And last I cleaned all potentiometer by open it up, clean it with ipa and solder dem back in. Doing that also removed the old grease and lubricated them.
I cleaned the surface and this one was ready to go. Unit works well. Here are my usual inside pics for you.