Famicom Disk loading freeze issue

[Mattolo]

Hi, I bought some week ago a Famicom disk system. The reseller tell to me that was changed the belt and that the system works.
The system at the first attempt don't move nothing of disk system. Then I unmount it and recalibrate the spindle; effectively the belt it's new.
Now it move and read disk , but freeze at loading screen.
I try some disks that works perfectly on my twin Famicom, but in this system every game freeze at loading screen.
Anyone have any ideas?

[Mattolo]

some video and photos:


https://photos.app.goo.gl/ENkGce6HBtihTK3Q9

https://photos.app.goo.gl/TZRy7W35pYEyGYFt8

https://photos.app.goo.gl/HTzizqPhLq72zxFU7