Hi. I have a taito New Zealand chassis and the image is far to bright. There are no focus or screen pots on the fly back. There is a focus pot on the neck board and this works fine. I have tried adjusting the brightness and contrast but it’s far to bright as I can see bright green lines in front of the image. Usually I would adjust the screen pot until it was black then introduce brightness and contrast etc however I cannot locate a screen pot. Please help. Pics of boards attached. Thanks