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Posted on May 19, 2010

My hand held Dyson vacuum will not charge. Every time I attempt to us it I get 3 charge light on the side flash?

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  • Posted on Jul 30, 2010
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My same symptoms are - after starting charge, Red light is on, then second light turns On. Then for a long time nothing happens. And later I have all three LED flashing.
I replaced battery and nothing changed.

Imeasured Power Supply voltage and found it 24.2v instead 28v as it stated on the label.

I opened it up and found that the three-lid chip marked 431 is faulty.
431 is a voltage shunt, which sets and controls output voltage.
You can use AIC431CUS or TL432 (TL431 has different pinout).
I replaced mine and volatge back to 28.25v and charger is now working as it should.

You can also use any TO-92 431 chip - there is enough room for it.

Good luck!

Lee Wright

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  • Posted on Jun 26, 2010
Lee Wright
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Read my other posts on the faulty transistor pickup on here,,cheers lee.

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