classicelectronics wrote:
I did a total recap and got it working, but the volume will not decrease to zero. I have no schematic and am asking if anyone is familiar with this kit ? Any help would be greatly appreciated.
Thank you.
--Dennis
Chasing through old electronics magazine is a good idea, I am sure something similar has been published. However, I can almost guarantee that the volume control is part of a voltage divider with, probably, a dual-gang 50K audio taper pot. This pot is no longer shorting the center tap to ground when turned all the way down, either because the ground is weak, or the pot has some defect or conductive debris near the low end of travel. Test that the low end of the pot is actually connected to the common return. It probably is a low-resistance but not zero, since I imagine you would have mentioned it if only one channel was like this. The chance of both pots in the dial gang pot being failed in a similar way are not zero, but the low sides are undoubtedly tied together and then supposed to be connected to the common return. So it is far more likely to have one problem affecting each channel in a common spot. Or, possibly, there is some debris or other obstruction of the pot not allowing the common shaft to rotate all the way to the end of travel.
Brett