I’ve just take delivery of a second hand NAC 102. I’m a bit worried about the knobs. The volume knob is especially bad but they both suffer from it.
They appear to reach their end of travel but then with just a little bit more force will continue on.
Apart from being worrying it means I can’t be sure balance is set to the centre and have no idea where the starting point for the volume knob is (i.e. what position the knob should be on for volume = zero).
Sounds like the grub screw has become loose. Pry off the rubber edge of the knob to reveal the grub screw, re centre knob and then tighten screw. Hope this helps
It looks like the hole you’d find on a power amp cover - there’s usually a serrated washer and a bolt to thermally and electrically secure the cover to the inner tray. What’s the history of this NAC102? Did it ever have a replacement cover?