Hi Ericson,

Please visit the link below:

http://www.electronicrepairguide.com/testing-flyback-transformer.html

Jestine

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Hi, good morning!
How to know if the fly back transformer is bad

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I read some of the comments here in your web site and it gave me more interest. It is good enough to enhance our mind to handle electronics troubleshooting. Thank for your humble advice.

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HI Derek,
Ok noted.

Jestine

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Hi Jestine,

Thank you for the reply and advice, I am located in the UK, the mains electric supply is 230VAC.

So I think this transformer should do the job, though as you point out the power output is a little low.

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HI Derek,

If your country is using 230 vac then you can get this unit. Before that you may need to take into consideration of the 100VA which I think is quite small. This means it can only withstand up to 100 watt max if the equipment you are repairing has a power factor of 1. If you are repairing an equipment that is rated more than 100 watt then you cannot use this transformer. In other words, the biiger the VA the better but it will cost you more.

Jestine

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Another route would be to construct an Isolating Transformer, maybe with:

http://uk.rs-online.com/web/p/din-rail-panel-mount-transformers/4338703/

Walsall Transformers 100VA Isolating Transformer, 15 V, 230 V, 400 V Primary 1 x, 230 V ac Secondary

Product Details
Control Panel Primary 230/400Vac with +15Vac Tap
High quality safety and isolating transformers designed for use in control circuits and general applications
Low loss noise laminations
Dual standard primary winding 230 / 400Vac with +15V tap for input flexibility
Dual secondaries are centre tapped. Earth terminal provided
Varnish impregnated for overall protection against humidity and rusting
Fully shrouded cage clamp terminal with voltage markings
Detailed product specification on permanent label
High efficiency, low regulation design

I would appreciate any comments.

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HI Austin,

Sorry I have not came across such problem before. Perhaps you can lower down the screen voltage and see how it goes.

Jestine

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