Comments on: Electronics Repair Questions/Answers and Testimonials- Part 79

By: Getachew

Getachew — Sun, 13 Sep 2015 14:31:32 +0000

v good

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By: admin

admin — Fri, 17 Jun 2011 13:24:39 +0000

HI Tony,

You are welcome and glad that you like the website.

Jestine

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By: Antonio G. Dalisay

Antonio G. Dalisay — Fri, 17 Jun 2011 02:31:12 +0000

Thanks justine i have a lot of knowledge regarding question and answer
when i read before i have many book or manual i buy,mostly ic manuals and
transistor others.but when i found this website.i'm so glad and also the
transistor easy to search by internet.
thanks so much.
tony.

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By: admin

admin — Sat, 04 Jun 2011 19:09:41 +0000

HI Eleno,

I have replied to your email.

Jestine

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By: eleno lopez

eleno lopez — Sat, 04 Jun 2011 15:54:22 +0000

hello Mr justine
This Morning I sent a Money Order for finding out burnth resistor ebook package may I know sir if you allready received it nad also sir may I know how much is the blue ring tester and if I order it what would be the procedure.

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By: admin

admin — Fri, 27 May 2011 13:13:46 +0000

HI Daniel,

Yes from my experience secondary winding rarely fail. So far after repair ten of thousands of equipment i came across only few that have problem and it was confirmed bad after comparing it with a good one in term of resistance test.

Sencore lc 103 have the feature (ringer test) that can test low inductance value like the secondary winding. If you have check that the primary winding is good, all the secondary diode and filter cap are good and no shorted load and yet one of the output have problem (o volt or low voltage) then suspect the transformer have problem. I will post this to my blog and see if there is anyone have a better ways on how to test the secondary winding.

Jestine

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By: Daniel F

Daniel F — Fri, 27 May 2011 01:56:55 +0000

Hi Jestine,

In many technical documents I read it always says that the secondary windings on transformers rarely fail.
In my limited experience of repairs this isn't the case. I often find smtp transformers with bad secondaries but the primaries are fine according to the Blue Ring Tester.

Have you found this too? Also, other than checking the output of the secondary diodes while in circuit, have you found any other way to accurately test secondary windings?

Thanks as always.
Daniel

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