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Thanks for the information. I spent the better part of the evening going over the chassis and found a number of resistors that had been replaced long ago in the blanking stage- none of which were the correct values. Once this was corrected the brightness control action now seems correct and the HV adjustment now functions. The schematic indicates 20.5 - 21.5 KV. At that setting the focus still seems soft but the convergence is a bit off which might be part of the problem. Also there is a drive line in the raster about 2 inches to the left of center screen and the video is squeezed quite narrow but not folded over. The H-linearity control alters it slightly and at one setting causes the line to go black with a gap in the raster. With minimum drive setting it’s still visible in the photo. The width adustment (swapping leads) at the yoke has no effect on it. The wave form is correct off the plate of the HO and at the grid of the HOT. Socket voltages of the HOT, damper and regulator agree with the schematic. Ideas?
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