Hi Martin, Many thanks for the last reminding above. With that in mind, I did my last try just before I give up to recover that PCB - to re-solder all those components on the PCB along the Tangential Drive circuit signal path. (Doing that I did find one resistor with one leg "loosely" covered by soder pad - not pushed into the PCB copper hole

The + and - buttons work and change the digit display alright, and the pitch variation remains when we hit the buttons. I've re-soldered all connector pins on the PCB as reminded by your diagram (some of them did show some crack). My impression when I did the cap replacing work is that generally the PCB track looks well . I'll certainly check

Yes, all caps as illustrated on the diagram coming with the kit, including those on the bottom plate. No, not one burst per revolution. It is continuous and dynamic abnormal pitch variation as the music goes. Sort of apparent that the deck failed to maintain a stable spinning speed. Looking at the block diagram of BG8000, in the Tangential Drive System

Hello Martin, Thank you for shipping me the cap kit quickly. Unfortunately same unstable spinning remains after the cap replacement. As the tangential drive circuit is far from what I can comprehend (AC mixed with DC?), I've tried to isolate the problem by mixing and matching components from another well-functioning BG8002 and found that everything