Weird Sound lags out of nowhere

One of my SC5000 players has started to lag while playing music, causing the audio to sound distorted and unusable. The player had been working flawlessly for years, and the issue did not appear immediately after updating to version 4.2. I even tried reinstalling the update via my laptop, but the problem persists.

I had it once, it is because of a bad firmware upgrade, or you may try to recalibrate your platter

How can i do that?

In the menus

IDK if I am blind… but i just can not find it