Hey there.

I got a second hand Tascam Portastudio 414 MK II

Overall It works and records. I replaced all the belts but I have this mechanical rattling noise when FWD button engage which I could not get rid of.

Any suggestions, reccomendations or pointers are welcome

See the the videos ( one with casette inside , one without )

I suspect it is caused by white gear in the middle when it is engaged to supply reel or take up reel

youtu.be/u9yJnKei7WU

youtu.be/TJwAC1cHISM