Sir 6six6 . . . . .
As Davenn said, it is a dual pot .....
This referencing does positively confirm that a counterpoised 50K dual pot is serving as the Harmless Kardon HK725 units balance control.
NOT that you are CONSTANTLY using that adjustment every day. I’ll just bet that your problems will all disappear just after you clean that control.
Initially beg for a used insulin syringe from diabetic ‘ole Granny Goodknockers down the street. Or drift on over to skid row . . . .they are AL L L L L L over the place, there !
Mark Up Reference:
Alcohol clean the syringe and dump in a cylinder full of control cleaner and I believe that my marked RED circles seem to indicate adequate clearance for that skinny needles passage.
If NOT, you can see that my BLUE circles indicate the visible two tabs of FOUR that hold the pots end discs on. That great of spacing away from these 4 holes, should let an inserted sewing needle create a slight flexure of the phenolic disc when put incrementally deep within a RED hole.
That increased extra little width should THEN let a needle in.
Immediately, just after a dump in of control cleaner rapidly run the control between extreme ends about eleventy seven times.
THEN . . . . . you repeat with the other section.
I think that will bring that controls functioning back to normal for another decade . . . (+)
(Might as well . . . do other frequently used controls while being down there in the trenches)
Do duly note that they have erroneously silk screened the VR202 volume control as being at that point also . . . not so . . . . Compare the additional phantom foil view of the board.
There are the 2 diagonal ground plane connections and the rotor and high side control connections, are going to their proper tie in components.
Thassssit . . .
73’s de Edd