I think on a reference tape we adjust it so picture and sound are in "lip sync" and when the tracking control is in the middle position the tracking meter reads maximum. It might need some adjustment after adjusting A/C head height with the other large nut. Normally neither nut needs adjusting.
another question.. can i use the "anti-serial" method to replace some 1uF 50V NOT polarized caps?
(2 polarized 1uF 50V in serial mode with the two + connected)
i have found 2 of them with ESR of about 4 ohms and one with 7.4 ohms (c20 on servo board)
i will receive some 1uF 63V not polarized next month , but i want to make some tests to reduce this audio noise...