How Do Flyback Transformers Fail?
Flybacks fail in several ways: 1. Overheating leading to cracks in the plastic and external arcing. If there is no major damage to the windings, repair may be possible. However, arcing from the windings punctures their very thin insulation so that shorted windings may already have developed. Even if the windings are currently in good condition, long term reliability of any such repairs is questionable. Nonetheless, it doesn’t hurt to try cleaning and coating with multiple layers of high voltage sealer, corona dope, or even plastic electrical tape (preferably as a temporary repair though I have gotten away with leaving this in place permanently). If possible, moving the point to which the flyback is arcing further away (i.e., a piece of metal or another wire) would also help. (The following from: Tom Riggs (thriggs@mail.netusa1.net)) For sealing flyback transformers, I have found that silicone sealer has worked very well. I used the clear variety, though others will probably work as wel
