Comments on: How To Locate The Primary Winding Of Flyback Transformer https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Thu, 30 Mar 2023 12:52:31 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Jestine Yong https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-401209 Thu, 30 Mar 2023 12:52:31 +0000 https://www.jestineyong.com/?p=1563#comment-401209 In reply to Micheal Rodgers.

Hi Michael,
The cold ground is your equipment chassis ground. Or you can look for the negative lead of the filter cap in the secondary side of your switch mode power supply. That negative lead of the filter capacitor is the cold ground.

Jestine

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]]> By: Micheal Rodgers https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-401181 Tue, 28 Mar 2023 10:39:23 +0000 https://www.jestineyong.com/?p=1563#comment-401181 Hello Mr jestine yong l would like to ask how do l find the cold ground on the secondary side of an smps?

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]]> By: Jestine Yong https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-373852 Thu, 25 Mar 2021 12:36:03 +0000 https://www.jestineyong.com/?p=1563#comment-373852 In reply to Wamunyima Biemba Patrick.

Hi Wamunyima,

It is impossible for all components to short and open in a circuit board. Usually only couple of components that can have problem. Without hands on assessment on that TV I can't tell which components to check or to replace.

Jestine

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]]> By: Wamunyima Biemba Patrick https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-373793 Mon, 22 Mar 2021 15:04:24 +0000 https://www.jestineyong.com/?p=1563#comment-373793 Hi jestine what caused all components to short/open on the board eg the HOT, resistors, and all Capacitors on the secondary side of 29 inch Nikura crt tv. Is it a board which needs to be replaced, what is your advise?

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]]> By: WISDOM LEDUM https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-362091 Thu, 05 Sep 2019 15:05:27 +0000 https://www.jestineyong.com/?p=1563#comment-362091 Thanks Mr. yong your article make me feel as one of the professionals in locating the primary windings of the flyback transformer. cause this have given me problems over the years each time I cane across new design of the flyback transformer.

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]]> By: Jestine Yong https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-348380 Mon, 17 Dec 2018 01:19:48 +0000 https://www.jestineyong.com/?p=1563#comment-348380 In reply to Mevias.

Hi Mevias,
I'm fine thanks. Your TV problem could be in the power supply fault. Have you checked the power supply section components? Have you checked if there is dc supply to the power IC?

Jestine

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]]> By: Mevias https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-348332 Sun, 16 Dec 2018 08:34:54 +0000 https://www.jestineyong.com/?p=1563#comment-348332 Hi,how are you doing?longtime since I sent you a mail,my tv went off,no power light,no light on the neck picture tube.what could be the problem.thank you good day.

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]]> By: Jestine Yong https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-321860 Thu, 14 Sep 2017 12:23:01 +0000 https://www.jestineyong.com/?p=1563#comment-321860 In reply to saeed.

Hi Saeed,

I no longer keep this flyback thus would not know what is the part number. That post already been posted 9 years ago.

Jestine

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]]> By: saeed https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-321690 Tue, 12 Sep 2017 20:31:01 +0000 https://www.jestineyong.com/?p=1563#comment-321690 Hello . What is the hi voltage number in the image above?

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]]> By: Jestine Yong https://jestineyong.com/how-to-locate-the-primary-winding-of-flyback-transformer/comment-page-1/#comment-308406 Mon, 30 Jan 2017 05:40:41 +0000 https://www.jestineyong.com/?p=1563#comment-308406 In reply to Md s islam.

Hi md Islam,

It could be dues to weak picture tube or the red circuit in the CRT board have bad components.

Jestine

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