Arcing In Flyback Transformer
This Sharp CRT TV came in with the complaint of loud arcing sound inside the TV. Generally the only loud sound from a CRT TV is a bad flyback transformer. After in service for many years the flyback transformer can develop hairline cracks at the body in which the high voltage will arc to the ground.
It is very difficult to repair such problem. Eventhough you can cover it with epoxy at the external area, somehow it would not last long and will eventually arc again.
Arc coming out from the side of the flyback transformer (Arrow above)
The best solution is to replace with a new flyback transformer. It was a pretty straight forward job when comes to flyback replacement. Just solder it out and fit in the new unit.
The part number was F0147PE. From experience, after the replacement of flyback, please check for any loose connection or dry joints in the nearby circuit before you turn the set on.
Conclusion- A Television that came in with arcing problem usually can be solved easily provided if you have the replacement part. Make sure you replace with the same type and part number of flyback. If you use an equivalent flyback, the display width sometimes can be too small or too big.
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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