A3000 Scan Doubler problem.

[voxel]

Hi :-)

Sounds like a cold solder join as the image comes up when you move the pot, have you looked at the pot solders ?

Many A3000 had that problem and making tree new good solders had cured it :-)

[voxel]

oups! double post!

[voxel]

@x56h34 :-)

quote:
to look for a better pot altogether. One with a knob which would stick out through the screw hole and be reachable outside of the case
endquote

I don't think you will find that kind of pot ;-) and even if you can I don't recommend such a modification.

As the circuit is made, you don't have to touch that pot more that one or two times in the whole life of your amiga.

And the pot used on the design is an endless multiturns model (so you can't break it by rotating it's knob too much, you will only ear a "clac clac" sound when you reach either sides and just turn the other direction to try to make a good tuning :-)