JVC tt-101 repair


Got a JVC QL-10 with a 120V TT-101. Speed is wonky. Sometimes plays fine, sometimes spins a 1000 RPM, somtimes runs forward & then backward. Could use some help.
128x128gary7
my TT101 engine has no torque at the start and not even when it has reached the standard speed ... in short, it never has torque; is enough a fan focused on the platter and stops.


Poll: Does yours TT101 runners have zero torque to stop as soon as you put a brush to clean the vinyl running?

I do not think!
I do not think!

The TT-101 has lots of torque,

I had a friend over and he wanted to see how hard he could press down on the spinning platter before the RPM display showed a change.

He kept pushing until finally I grabbed his hand because
I was worried damage might occur.

So plenty of torque yours has an issue.
@totem395 

many thanks for the explanation, I'm sure mine has very serious problems, but it was necessary to understand from the owner that has a fully functional TT-101.
Lack of torque may be a sign it needs calibration, which is not a big deal if you can find someone who knows how to do it.  Before that, though, the electrolytic capacitors should be evaluated and probably most of them need replacing.  Failure of the electronic braking is another sign of needing calibration.  (Of course, Chakster is among those who have chastised me for harping on the need to replace the old electrolytics, so...)
@lewm

A good repairer after having spent many hours at TT101 and having solved several problems, he gave up and gave it back to me; now I’m waiting for another good repairman who will do it dedicating a bit of time when he feels like it.

He is informed that he will not be able to ask for a lot of money in case of success because the expense can not exceed the value of the turntable used and he accepted very willingly because this will be a great challenge for him; it is a repairer who is one of the largest and most important reel to reel repairers in Italy.

If it fails then it will be impossible to repair it without dedicating dozens of dozens of hours on it.