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Argus25 · 25th Jan 2018, 2:51 am

It does appear to have pincushion distortion, that could be probably be adjusted out on the E-W modulator circuit, but interestingly more on the right than the left and an error in that circuit usually gives a more symmetrical defect in the geometry. Ignoring that though, for the moment, looking across the center of the scan from left to right there is a horizontal linearity error with compression of the scan centrally and stretching on each side to some degree. I wonder if there is something wrong with the S correction capacitor value or if that capacitor is leaky or shorted. Worth checking, just in case.

Sometimes there are external magnets on the yoke or tube bulb that can distort the geometry of the raster, and affect all three beams the same if they are out of adjustment. It does seem the defect is more on the upper right side of the raster than elsewhere.

25th Jan 2018, 2:51 am	#4
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: GEC 2110 picture distortion It does appear to have pincushion distortion, that could be probably be adjusted out on the E-W modulator circuit, but interestingly more on the right than the left and an error in that circuit usually gives a more symmetrical defect in the geometry. Ignoring that though, for the moment, looking across the center of the scan from left to right there is a horizontal linearity error with compression of the scan centrally and stretching on each side to some degree. I wonder if there is something wrong with the S correction capacitor value or if that capacitor is leaky or shorted. Worth checking, just in case. Sometimes there are external magnets on the yoke or tube bulb that can distort the geometry of the raster, and affect all three beams the same if they are out of adjustment. It does seem the defect is more on the upper right side of the raster than elsewhere.