Quote:
Originally Posted by Findm-Keepm
From experience, filter caps in the scan-derived supplies (those off the flyback secondary) generally cause such issues (discussed ad nauseam in this thread!) AND failure to replace the ferrite beads when replacing the HOT or Horizontal Driver transistors. I remember some JVC chassis where the ferrite portion of the horizontal driver transformer cracked and caused problems with Barkhausen-like lines as well.
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Thanks for looking into it. I haven't found the SM anywhere, not even on ebay.
As far as I remember, there were no ferrite beads on any of those parts; I absolutely would have noted anything like that and written it down. I am exhaustively careful when I do any work. I make a spreadsheet and write down what every part is and make notes and take pictures of everything before I do any work.
I've got another identical set in storage I can open up and check for anything different, but I probably won't get it out for awhile.
And yes, we all talked a lot about capacitors. I did replace all of those. I replaced pretty much everything at this point, certainly anything in the deflection, power supply or video.