Hey all, it's fathers day, and I decided to try and fix my dads turntable. I've got some incentive to get it done, hes got mine in the meantime...haha. As above, it's a Technics SL-M1 with the pitch control slider. The problem it's having is when quarts lock is engaged, the strobe seems to bounce, or pulse, you can definitely hear it in the music too. Like it's not playing at a consistent speed. If I try to use manual pitch control, it goes whacko. Faster, slower, all over the place in no particular pattern. The table itself is in superb shape, and I'd really like to get it fixed. Lots of sentimental value to me and dad. Any ideas where to start troubleshooting? Any help would be appreciated.