Vintage DD turntables. Are we living dangerously?

Little news.

I’ve solved all the problems of my TT-101, rotation, running led's, display, engine brake, speed adjustment and more.

After 7 hours of proper operation, the engine started to lose laps inexorably.
To start it now I have to push the plate manually, rotate regularly for some time then go back and lose speeds and slow down.

The engine looks very tired and has no strength to restart.

I read that another forumer here has the same problem but I can not locate her nick.
Fractured this pcb as well as Lewn’s pcb?
Ideas to solve the my problem?

Cheers

Dear best-groove,
What do you mean when you say the "engine started to lose laps inexorably"?  It would help if you can make the problem more understandable.  However, I also think that it would be impossible for any of us to say categorically what is your problem, because the TT101 is such a complex beast.  You need the services of a good technician who can assess the unit on his own bench top.

There are known issues to be aware of:  
leaky, old capacitors (replace all electrolytic capacitors with new),
bad control chip (possible but appears to be rare in actual experience),
bad solder joints, especially around the eyelets (very high on the list),
fractures in the PCB (mine and at least one other, but maybe not so common).

I didn't mention potential problems with ANY old turntable, such as issues with the bearing and spindle shaft.

Also, best-groove, it is probable that your turntable needs calibration. As I understand it, calibration involves equalizing the impulses derived in each of the 3 phases of the motor cycle.  JP can elaborate if he is around.

Hi Lewn,

The defect is that the engine rotates well and adjusts for a long time (2-3-5-7 hours) then inexplicably the motor loses its rotation and slowly rotates.
I preferred to leave the electorolytic capacitors to be replaced last after having managed to solve all the problems.

The problems were resolved brilliantly (there were just a lot of welds to be tapped)

I had read in this 3ad that one or a couple of members had the same problem but did not have the time to search and understand in 30 pages as members has or had my own problem and know if they solved.