really common problem...
there was a topic on the dstyles board 2 years ago, cant pull up the article cause some fu*ker hacked it, but i remember a dude had to replace the main IC chip under the platter and under the plastic covering, i think its the main chip considering it had a hinksink on top....
if yours is the first generation ttx, that should fix the problem, but im not 100 percent sure, if yours is the 2nd genereation, it has the motor torque settings, thier should be a vent under the platter.... so with that im not sure if its the same problem..
touches on the problem...
http://www.skratchlounge.com/index.php?showtopic=3754
might be best to take it to the repair shop, i'll poke around to see if i can find the issue....