AK- you never mentioned if you actually switched the wires INSIDE the machie

Remove the sleeving from both leads.
6. Connect the large lead to push-on terminal
labeled “3” on the adjacent PC board.

7. Connect the small lead to terminal 15 of the line

8. Reposition insulation to cover line switch.
9. Re-install wraparound.
10. Move the lock pin to allow switch movement for 230 V selection only.