I have recently got a nice Sony TC-645 Reel to reel taperecorder. It seems to be in a generally good condition. Everything works. But: the tape speed is a little bit too slow. When I play music at 7,5inch speed the music is about 'one tone' lower than it should be. I have found out, that if I press really hard down onto the capstan (the metal pin that gets the whole thing going) with i.e. a screwdriver, the speed increases to the normal and has the correct speed. My question is, how can I make the capstan have a permanent sufficient pressure (without my help)?
Hope someone has some nice knowledge about this so I can fix it! :)
Best wishes, Joakim