Comments on: Electronic Repair Questions/Answers & Testimonials Part 19 https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Mon, 27 Jul 2015 08:29:49 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Jestine Yong https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-175221 Thu, 20 Dec 2012 13:29:11 +0000 https://www.jestineyong.com/?p=1490#comment-175221 In reply to akram.

Hi Akram,
Have you checked all the surrounding components and the secondary output diodes? If all are good I suggest that you try replace again this IC and retest. Sometimes a new IC could gone bad too. I have encountered some similar cases.

Jestine

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]]> By: akram https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-174781 Wed, 19 Dec 2012 14:40:35 +0000 https://www.jestineyong.com/?p=1490#comment-174781 Hi Jestine,
IC part no KA5Q1265RF and the input that i hv check on this ic is 11v. 

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]]> By: Jestine Yong https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-173952 Mon, 17 Dec 2012 21:58:47 +0000 https://www.jestineyong.com/?p=1490#comment-173952 In reply to akram.

HI Akram,

What is the ic part number and what is the supply voltage to the ic? Have you checked all the components in the primary side? Check also for shorted secondary output diodes.

Jestine

Jestine

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]]> By: akram https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-173890 Mon, 17 Dec 2012 20:05:55 +0000 https://www.jestineyong.com/?p=1490#comment-173890 Hi Jestine,
I already change the IC but still got no voltage on primary of swtiching transformer.
 

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]]> By: Jestine Yong https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-171006 Tue, 11 Dec 2012 23:11:54 +0000 https://www.jestineyong.com/?p=1490#comment-171006 In reply to akram.

Hi Akram,

Try try replace it. in order to have high voltage the flyback must need a B+ voltage and the HOT base must have a square wave.

Jestine

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]]> By: akram https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-170702 Tue, 11 Dec 2012 12:12:33 +0000 https://www.jestineyong.com/?p=1490#comment-170702 no any high voltage. I suspect this component not in good condition KA5Q1265RF. 

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]]> By: Jestine Yong https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-170495 Mon, 10 Dec 2012 22:39:22 +0000 https://www.jestineyong.com/?p=1490#comment-170495 In reply to akram.

Hi Akram,

Is there high voltage?
Jestine

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]]> By: akram https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-170369 Mon, 10 Dec 2012 18:23:07 +0000 https://www.jestineyong.com/?p=1490#comment-170369 Hi Jestine,
I have a Samsung CRT tv. The problem is no display on screen, I check the supply on secondary part there is no any single voltage.Tq.
 

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]]> By: John Marko https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-5688 Fri, 04 Jun 2010 12:12:21 +0000 https://www.jestineyong.com/?p=1490#comment-5688 Regarding your reply:(First, is all the output voltages good and stable? If yes, then what voltage did you get at the supply pin of inverter IC when you first turn on the Monitor?)
I did not check output voltages, I do not have your book and I do not have a schematic. So cannot get inside monitor.
John Marko

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]]> By: admin https://jestineyong.com/electronic-repair-questionsanswers-testimonials-part-19/comment-page-1/#comment-5634 Mon, 31 May 2010 12:02:34 +0000 https://www.jestineyong.com/?p=1490#comment-5634 HI John,

First, is all the output voltages good and stable? If yes, then what voltage did you get at the supply pin of inverter IC when you first turn on the Monitor?

Jestine

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