Repair service help for a ferguson 991T

[peter scott]

My thoughts were that the average line speed was correct for a straight left hand side but without the 1uF would be able to rapidly change line speed by the time it had reached the first test card vertical line. Having said that the photo of the test card in your #36 post doesn't appear to show the problem so perhaps you've fixed it since making the YouTube video which I think is dated Feb. 2021. The 1000 volt rating of your 1uF is a bit higher than you really need. 100 volts would be more than enough but that shouldn't matter. Did you replace C65?

Peter