texman
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Feb 13, 2005, 5:02 AM
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Samsung RP convergence problem
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My Samsung PCH521R (June 1999) has a convergence problem. After working fine for years, I turned it on one day and the picture had the "bowtie" shape, and the guns produced three very separated RGB images. I opened the cabinet to look for obvious component failure and such (I have the service manual,), and found a blown 3A SB fuse. My schematics are poor copies, so I THINK this fuse, F855, is for -26vdc, which is used only for the convergence amp STK391-020 hybrid IC's, I think. After replacing the fuse, it immediately blew when powered up.
Since I'm a do-it-myself type (elec.tech in an unrelated field), and cashflow is tight right now, I would like to attempt this repair myself, even if I don't succeed. Do you think replacing the STK391-020 IC's is a logical first step? Is there something else I should be looking at, instead of, or in addition to the IC's? Any help will be greatly appreciated.
Ted A.
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