Vintage DD turntables. Are we living dangerously?

Good evening group.
i just inherited a JVC QL-10 with Lustre GST-801 from my uncle who passed away.
He bought it brand new in lates 70s.
I would say it hasn’t been turned on in the last 15 years.
i brought it home, cleaned it up and tried it.
it locked on 33.33 for about 5 minutes and then it sped all the way up to about 67.34 rpm.
33 and 45 run at that speed and then I can see it slows down and goes back up.
I opened it up and out of my league.
i can do some things, but this one looks scary.
is there a place where I can send it?
How much could I be looking at to have it fixed?
Thank you!

Lewm, thank you for the quick response.
So every capacitor should be replaced on every board?
some of them are pretty tiny.
I see a few big ones by the power supply.
i have replaced caps in the past, but they were much bigger and it was on my amp.
When I took the TT-101 apart, it really scare me, everting seems so tight and there are wires everywhere! 
I’m used to seeing amps, which are much neater inside.

Yes, 120v 60hz 23W.

I used contact cleaner on each pot, moved them back and forth and set them back to where they were.
it did not take care of the problem.
the motor seems to speed up to top speed and then come down to almost a stop.
the digital display does not change because it seems that it’s taking an average.

I definitely made things worst for my self.
and probably added more to a repair bill for moving those pots.
I hear that calibration cost $1000 for this QL-10? and I’m guessing that doesn’t include redoing the caps??
i wanted to fix it since it was my uncles.
worst come to worst, can I get a ql7 platter and still use my plinth and arm?
Thanks everyone for the responses.