Hi, welcome the the forum (BTW we use our real names here and you can add that to your signature in the user control panel). There was a similar problem with another members Technics. You can find that thread here;
http://www.tapeproject.com/smf/index.php/topic,530.0.htmlIf the machine is always slow (or does it speed up and slow down?) it could be that your tape path is contaminated with some gunk that's slowing the tape movement. Before you open it up and start checking the connections> reel motors> capstan motor controls, pull the headblock (3 silver headed hex head screws, then just pull the block straight out) and clean every surface the tape travels across thoroughly, make sure and let it dry completely before threading tape). Check that all the rotating parts (reversing roller, tension rollers, pinch rollers are rotating freely). Once all those basic things have been checked, put the headblock back on and try a tape. Make sure that the pinch roller is rotating at the same speed as the capstans when it's in play mode (use an tape you don't care about for these tests). If the machine was working correctly before (has it been in storage for a while?) try just running it from function to function (ff, rewind, play, stop, play, stop etc) since it could just be gunked up switches or controls.
If none of this helps, follow the thread above and be sure and check all the connections leading to the motors and clean the trim pots that control tension and capstan speed.