Loud Sparking Sound In CRT TV Solved
The complaint of this Sharp CRT TV was very loud sparking sound inside the TV. For your information, loud sparking sound usually is due to leakage in the flyback transformer where you can see an arc hitting the nearby ground.
The cover was opened and when I closely looked at the flyback transformer, true enough there was a slight crack-see the photo below:
There are repair techs that tried to cover it with epoxy or even using back the hard plastic from its casing to melt and seal it. It can work but not for long. So the long term solution is to replace with a new one. The part number of this flyback is JF0501-32601-see the photo below:
I got the replacement part from the local market and the shape of this flyback transformer look slightly different from the original one.
See also: Humphrey’s CRT TV Repair Ebook
I believe the flyback transformer is from China and the price was also not expensive.
I did not immediately close the cover because I found some dry joints in the circuit board. If you did not apply fresh solder onto these dry joints, sooner or later the customer will surely call you again to solve another problem.
This means do the best once and for all. If the repaired equipment can last long, I believe it will give a good impression to the customer to continue to send things for you to repair. Word of mouth also important to help spread your repair business thus in the end you will get constant supply of work which can turn into profit. All the best to you.
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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