Question about Samsung HCL4715W 47" Rear Projection Television

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More Convergence Issues

Red, Green, and Blue images were mis-aligned, was unable to align manually (could not control red, and green only in "y" direction). I replaced both convergence ICs, and still the same problem remains. When manually adjusting the color grid, I am unable to adjust the red grid, and can only adjust the green grid in the "y" direction. And when I turn the red grid off for adjustment, there is still a wavy red line on the top of the screen. I did notice that "RR402S" and "RR471S" look like they are both fried, but I assumed since they are SEMI variable resistors, they were part of the volume control circuit? Am I wrong? Could these components be part of the convergence circuit? Any help would be much appreciated, this sorry tv has got me at my wit's end.

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  • aufanincinci Feb 03, 2008

    Thanks for the quick feedback, I'll go ahead and order replacement parts and get back to you.

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They are definitely a part of the convergence circuits. A variable resistor increases resistance as they warm up. So excessive heat destroys their capacity to perform as was designed and you will continue to have issues until all components are within 5% tolerance levels. Hope this helps. let me know if you need anything more for information.

Posted on Feb 03, 2008

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