Electronic Repair Questions | Electronics Repair And Technology News

Completed Another Advanced Electronics Repair Course

Jestine Yong — Wed, 12 Apr 2017 13:50:31 +0000

Just completed another Advanced Electronics Repair course for 7 participants. The three foreign students will continue with the Higher Advanced Electronics Repair class tomorrow. Below are the photos taken during the three days course: Likes(4)Dislikes(0)

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Completed Advanced Electronics Course

Jestine Yong — Wed, 23 Nov 2016 13:38:25 +0000

Just completed the Advanced Electronics Course today and below are the photos: Likes(6)Dislikes(0)

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Why Electrolytic Capacitors Would Not Last?

Jestine Yong — Fri, 14 Feb 2014 14:21:58 +0000

Hi Jestine, I hope you are okay, its been along time. I have this problem with server power supplies, they seam break one after another (in different servers). I noticed the first one that fans could spin, but the server could not power up. When i opened the PSU, i saw that a few capacitors were bulged. When […]

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No picture at the bottom of the screen

Jestine Yong — Sat, 08 Feb 2014 02:58:42 +0000

Sir I have IBM CRT monitor 17”. Model No is 6332 PCE /A Problem is picture works fine on top of the screen but i cant see picture in bottom of the screen. I can see half of the screen but top of the screen. Vertical ic is STV9302. Sir could you please help me […]

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TV LCD Screen Cracked On Its Own

Jestine Yong — Tue, 14 Jan 2014 04:01:04 +0000

If you take a look at the comment in the link below there was a complaint of LG LCD TV where the LCD screen cracked on its own: https://www.jestineyong.com/lcd-tv-screen-cracked-on-its-own/ Judging from so many complaints received it seems that the LCD screen were cracked on its own and not due to user faults. I myself have […]

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How Long Will A Capacitor Last?

Jestine Yong — Wed, 16 Oct 2013 02:20:24 +0000

Sir, how many years does it take for a capacitor to expire when in use. I asked because in the news letter you sent me , two capacitors were confirmed death cos they worked for over ten years . Answer: I guess you are referring to Electrolytic capacitor. It depends on the brand, design of […]

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Comparing Defective Component With Good One

Jestine Yong — Mon, 14 Oct 2013 04:16:39 +0000

Is it possible to compare defective component with good one for doing servicing job? If so then we have to buy & stock all good components for reference….. which is IMPOSSIBLE. Answer: It is not necessary to keep all parts for comparison.Example, I’m very familiar with LCD high voltage transformer winding value/result thus I don’t […]

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Resistor Color Code Problem

Jestine Yong — Wed, 25 Sep 2013 04:48:06 +0000

Should I replace a resistor that the color already changed from Red to Brown but the value still measured good? Answers: Yes, the resistor should be changed to avoid intermittent problem and breakdown when under full load. Not only that, if the resistor left to run and continue to get hot, all the color codes […]

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Capacitor Leak On The Board?

Jestine Yong — Wed, 18 Sep 2013 03:08:17 +0000

Could you tell me if this a capacitor leak on the board? Thank you Answer: Those are not electrolyte (leakage) from the electrolytic capacitors. They are just some sort of glue/epoxy/hard silicone to secure the components from vibration effect. Some components tends to be loosen easily this is why the manufacturer have to use […]

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Concern About Technical Information

Jestine Yong — Tue, 17 Sep 2013 06:27:51 +0000

Thank you for your articles and information. My concern is about technical information. It’s good to have test equipment and troubleshooting skills. But you must have a GOOD repair manual with schematics showing voltages and other information. Also, must have parts list. I can’t find any! So many transistors and diodes I see now are a mystery. They have no […]

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