For some reason my red gun's image keeps jump to the right and then back in convergence over and over. I had the same thing happen with a blue gun on a few occassions, but it only seems to happen once in a while.
One of the items I do to my Barco projectors is modify the width board with better quality resistors. Barco used some cheap ones that allow a lot of varation from heat up to cool down. Replace R 100, 200, 300 I beleive on the upper convergance board with the width pots. Also if you have a earlier one the caps need to be changed to 400v
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