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.
Once the part was fitted and powered On I could see the power LED light without any sparking sound. I knew it can work already-see the two photos below:
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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Note: You may check out his previous repair article in the below link:
https://www.jestineyong.com/haier-lcd-led-tv-repair/
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Paris Azis
March 17, 2016 at 5:50 pm
Good job Suranga,
...With the best part of your text being its last paragraph!
Best Regards
Yogesh Panchal
March 17, 2016 at 6:40 pm
Suranga,
Thanks for sharing your experience.
Humberto
March 17, 2016 at 11:05 pm
Good repair Suranga. Keep up sharing your own experiencies.
Robert Calk
March 17, 2016 at 11:40 pm
Good job, Suranga. I agree with Paris. That is very good of you!
suranga bandara, Suranga Electronics
March 18, 2016 at 1:20 pm
Hi All,
Thanks so much.
albert van bemmelen
March 18, 2016 at 3:14 pm
Professional repair with longlasting result as always Suranga! I am always a bit scared to do such a replacement of the original Flyback transformer because I would not be able to measure the exact High Voltage output on the CRT tube without the expensive HV probe. But I guess that the resulting picture size of the tube image would also reveal if it was set too High (thus preventing dangerous X-rays). Something that you in these repair circumstances rarely read about.
suranga bandara, Suranga Electronics
March 18, 2016 at 6:12 pm
Thanks !
Mr- Albert van bemmelen.
Gerald
March 18, 2016 at 3:34 pm
Good job Suranga and great philosophy of professional repair.
Thanks for sharing.
Cheers,
Gerald
Parasuraman S
March 18, 2016 at 7:43 pm
Another good job done with as much ease as possible, from the depth of your experience and expertise!
frank
March 19, 2016 at 9:35 am
great suranja,lasting repair is the key to getting more customers
G. Gemmell
March 19, 2016 at 10:42 am
Very professional - unlike most repair people now you always do a thorough job and the last paragraph is so true - nothing like word of mouth to give you business a good name!
beh
March 19, 2016 at 6:04 pm
Surenga: good job and thanks keep it up.
Jayaprakash
September 5, 2017 at 5:45 pm
Very nice