If I recall correctly, the VRDS mechanism spins at 4x normal CD speed, to account for buffering, etc. At that speed, it would seem that smaller noises could get a bit magnified. My UX-1Pi occasionally makes the noise you describe and when it does, I take the disc out and reseat it. That usually does the trick.
I agree with Guido - I've also heard that noise attributed to the ceramic bearings. Interestingly, as part of the APL NWO re-working of several Esoteric players, these bearings are replaced!
I agree with Guido - I've also heard that noise attributed to the ceramic bearings. Interestingly, as part of the APL NWO re-working of several Esoteric players, these bearings are replaced!