The Radio Board.org
what are the 4 potentioneters inside the walkman srf-s83 for? (flathead screw heads)
Here is a link to typical polyvaricon capacitor. https://aucklandvhf.org/product/2-gang-45-130pf-miniature-polyvaricon-for-am-fm/
They are trimmer capacitors and part of the tuning capacitor. Rich
They look like trimmer capacitors. There is probably a cheap polyvaricon tuning capacitor on the opposite side of the printed circuit board.