![]() The earlier 1A’s used a 4 tap inductor, while the latter used a 5 tap. (I edited this reply a couple of times because I wasn't comfortable with some of my original comments.) I'll look at the schematic and see if I can offer any other suggestions. If you can, check the other frequencies and cut / boost amounts carefully. Sometimes, if the exact fault is known, a part can be added inside the main chassis to repair a fault in the network. ![]() It might be difficult (or impossible) to remove and repair it without doing even more damage. Don't do anything that might damage the potted network, because it's basically irreplaceable. The problem might or might not be a capacitor. It might be helpful to verify the accuracy of the frequency settings that do work, along with cut/boost amounts. ![]() For an experienced tech, patient, methodical fault finding could probably identify the problem in an hour or so but it seems difficult to give easy to follow, safe advice for fault finding. The problem could be caused by the switch, wiring, inductor network, a capacitor, a previous repair, etc. If one is not a very experienced tech then one should tread very lightly with a unit like this.Įven though the circuit is in essence pretty simple, there are ways to go wrong. I was a little afraid to try to advise since this is such an expensive piece, with so many dollars potentially at risk. ![]()
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