There are many videos on YouTube about the AT-LP120-USB. Just do a search and you'll see.
Here's some specific links that I found very helpful on my journey to discover a much "purer" version of the unit.
You may not find it necessary to remove the USB, but the anti-skating is something that definitely needs to be addressed.
The earthquake mentioned occurred Nov. 30th, 2018.
Images for Anti Skate Fix -
https://imgur.com/a/J4tdA
Anti Skating Fix Video -
https://www.youtube.com/watch?v=UzqogQIok5k
USB Removal -
https://www.youtube.com/watch?v=4NT67ii04uQ
https://www.youtube.com/watch?v=zvhlDhEH4FQ
My other YouTube channel -
https://www.youtube.com/channel/UCYEJ6y-62diY1_9Nus8VDmA
