Of all the brains, I know.....I need the schematics for my 1982 SOny Cassette-Corder WM-R2 Walkman....I took it apart to change the belt, and lo and behold, there is a little piece that looks like a comma with a metal circlet inside that,...I can't remember where it came from....I thinks it hooks up the record and play....but until I find out....can someone help???????????????