Randy,
You have to rid yourself of that crutch quickly, as it isn't
really a crutch, but rather a hobble.
Every part you change comes with the risk that you will do it
wrongly, and add another thing to fix...
The rub is, that once you replace a part, your mind won't let
you look there again, as it has to operate under the belief
that you did the replacement correctly, or it will be stuck in
a loop.
Replace only the broken parts, until you have fixed the supply.
After it is fixed, you may want to update some of the risky parts,
you might not.
I always have a good reason for each part I replace. Sometimes
it is wrong, but never is it done without serious thought.
If the part isn't bad, put it back. Otherwise you are adding
another variable to an already complex equation.
-Chuck Harris
randolphbeebe@... wrote:
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Albert,
I printed out your previous replies for my future reference. The reality is that I do not fully understand the circuit logic on this scope which is why I am not too effective at diagnosis. You not only helped me isolate the problem but walked me through the diagnostic process which will help me in the future...,many thanks!
I started this hobby only recently and am impressed at how many guys are willing to share their hard won knowledge and time.
As for needless component replacement, it is the crutch of the neophyte. The only positive outcome of all that extra work is the super-clean DC power now powering the scope:-) .
Best,
Randy
