Harrison,
When my U550 failed, I got one from Sphere. I don't think they were listed on his site but, at least at that time, had some pulls from working scopes. You might check there if you still suspect it is in that module.
Thanks,
Barry - N4BUQ
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----- Original Message -----
From: "Harrison" <buma7@...>
To: [email protected]
Sent: Wednesday, September 9, 2020 3:47:17 PM
Subject: Re: [TekScopes] Tek 4654M; No Trace, No +5V, No +95V; Help
I am afraid that I have been jumping around too much and now, even with good
shop notes, am not sure what elements/modules I think are good and which
might be bad. Looking at the troubleshooting diagrams every thing still
points to the HV power supply. Currently there doesn't seem to be any out
there so it is a case of building a complete unit or repairing what is
there. I am coming close to declaring this unit a parts machine and closing
the book on it but I hate to do so. A repair might be right around the
corner or I am missing the obvious and the fix is staring me in the face.
