hugh.evans
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May 15, 2011, 7:26 PM
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Toshiba 57H94 Blue Alignment Problem
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I've had my Toshiba 57H94 in storage for the past year, upon firing it up again yesterday I found that Red and Green converge normally. During auto convergence parallel lines go across the screen normally for all colors but blue, which displays straight lines that are wider towards the left and narrower towards the right of the screen (almost forming a triangle.) Manual convergence allowed good adjustment of Red and Green, Blue was fully responsive both horizontally and vertically but way out of alignment so that it could not be may to fully converge. Based on these symptoms it seems more like the blue CRT is out of alignment. Either that or perhaps one or more resistors has drifted out of spec. I initially suspected convergence ICs, but if I am able to move the cross-hairs in all directions it seems to suggest another problem. Any thoughts or suggestions will be appreciated. If anyone has a link to the technical service manual for this set or would be willing to send a copy, tell me where to get one, etc. it would be a huge help. I am experienced with soldering, electronics repair, and working with high voltage equipment. If pictures would be helpful, I can try to take a few. Thanks!!!
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