Comments on: Dead SONY KLV-40R472A LCD TV Traced To Faulty PFC Adapter And Brought Back To Life

By: Anne

Anne — Wed, 14 Jul 2021 11:47:09 +0000

Where can I get the motherboard for the same model number?I am in Kenya and I can't find any.

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By: ivan

ivan — Thu, 03 Sep 2020 06:39:09 +0000

thanks sir, and congs upon your 200th article

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By: Humberto

Humberto — Thu, 27 Aug 2020 05:36:16 +0000

Good repair and Congratulations for your number 200. Have a lovely day.

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By: Henrique J. G. Ulbrich

Henrique J. G. Ulbrich — Mon, 24 Aug 2020 22:26:35 +0000

In reply to Parasuraman S.

Thanks, Parasuraman. I didn't have enough knowledge of PFC circuits until now. This motivated me today to look for information in Internet. Now I know that the key is the use of a boost circuit inherent to the PFC circuit, which explains the extra voltage. New for me. Life is an eternal learning. Thanks again.

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By: Jestine Yong

Jestine Yong — Mon, 24 Aug 2020 09:51:55 +0000

In reply to Albert van Bemmelen.

I would like to give a special thanks to Parasuraman for contributing great repair articles. I really admire your hard work and dedication to this repair field. You are awesome! I also want to thanks those who have contributed and still contributing the articles to make this blog a website that is a must to visit for all electronics repairers. All of you just amazing!

Best Regards
Jestine Yong

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By: Parasuraman S

Parasuraman S — Sun, 23 Aug 2020 11:02:34 +0000

In reply to Henrique J. G. Ulbrich.

Now, when I come to think of it, I select for writing an article, only such cases, where there is something to learn. That is why it is only 200 out of thousands of cases I have handled so far. I always love to aim at beginners, who might struggle to get a grip, after thrown open from a training institute. I mean, raw hands. So, I take care to include basis steps too in many of my articles. I think and believe that imparting knowledge, training and bringing such technicians up is bestowed in our hands, being a fellow living being just like any of us. If we turn back, see and evaluate, we will get many such situations and guiding the upcoming technicians is indeed incumbent on us! Is it not?

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By: Parasuraman S

Parasuraman S — Sun, 23 Aug 2020 10:55:38 +0000

In reply to Anwar Shiekh.

I checked the link and also consulted an expert in the field, who is my friend. According to him, the link talks about PFC provided in the UPS. This adapter in the article is a one, which uses a PFC control because of the wattage rating of the TV. There are two types of PFC, one is active and another is passive. This Sony adapter uses active. But passive control as used in UPS and such large devices, is sturdy and more reliable.

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By: Parasuraman S

Parasuraman S — Sat, 22 Aug 2020 22:07:32 +0000

In reply to Joseph Chemai.

Yes, you are right. In India, it is 220V to 230V AC 50Hz.

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By: Parasuraman S

Parasuraman S — Sat, 22 Aug 2020 08:48:53 +0000

In reply to Anwar Shiekh.

Many thanks! Shall check!

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By: Parasuraman S

Parasuraman S — Sat, 22 Aug 2020 08:48:11 +0000

In reply to Imoudu Onwumah.

Many thanks. Just click on the previous article link, one by one. You can read all!

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