karyoker @ Mon Jul 16, 2007 11:41 am wrote:
I just changed a slider in a Mackie. Not familar with Yamaha but here are some things you can try.
There is a dust cover over the sliders with slots that the slider arms work in. Check the gap and see if is still tight. The next step is getting some contact cleaner or tuner cleaner at the shack Insert the nozzle into the slot and hit a couple of times than run the fader back and forth.
Contact cleaner is one of the best inventions of the 20th century. Works great on pots too!