I have a USC1 and a USC2.... the usc2 scans, picks up a record and then puts it back over and over without playing the record. IF...I turn it on and off at the right time it plays the record fine.... then the next record it does the pickup and puts it back again over and over... I heard it was a clutch that needs cleaned...but no idea how to do this or how hard it is to do.... any help ?