Comments on: Bad P6KE150A Transient Voltage Suppressor Diode In HP Power Adapter

By: Nihat Zyulkyarov

Nihat Zyulkyarov — Fri, 22 Jan 2021 13:44:58 +0000

In reply to Albert van Bemmelen.

Thank you !

In future i will know that i should use a safety light bulb serial connected when i am repairing something!

Thank you very much again !

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 21 Jan 2021 18:37:49 +0000

I noticed some typos in above post, meant to write : if no longer fixable NOW at best use or buy... , exchange the power cords so THEY fit again. (Sorry...old keyboard and big fingers). Good luck in fixing your power supply!

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 21 Jan 2021 18:33:28 +0000

In reply to Nihat Zyulkyarov.

I am afraid that when you tested the adapter without a safety light bulb to protect a big short circuit current from happening it now destroyed your controller and the e-cap. That created the big BOOM!
I am not sure if these parts are available. If your device no longer is fixable not at best use or buy another power supply and if possible exchange the power cords so the fit again. Instead of a thin 03 mm 'fuse'wire you should have used a safety light bulb to protect the parts from overcurrent. Hope this helps you to find a solution.

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By: Nihat Zyulkyarov

Nihat Zyulkyarov — Wed, 20 Jan 2021 12:40:16 +0000

Hello Albert,

I have the absolutely same HP Adapter and it has failed also.
Few days ago i opened it and found that the fuse F1 at very beginning near to 220V input (3.15A/250V) has burned (measured) and i decided to replace it for testing only with a tinny wire ~0.3mm..
When i plug the 220V power on i received a big BUMMM! and found that the biggest size capacitor C1 - 68uF/400V (near to diode you changed) has literally exploded.
Then i found your blog and read what you have done! I measured my diodes, resistors and K2545 , but cannot found any failure.
So would like to ask you as well as others here what could be the issue in my case ? what to measure or test next?
I am not sure how to measure DAP 001 controller if it is OK or not ?
In my case ZD1 Diode is OK according to my multimeter.

Thanks in advance !

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 23 Feb 2017 23:40:26 +0000

In reply to Mahmoud.

Thank you Mahmoud.

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By: Mahmoud

Mahmoud — Sun, 19 Feb 2017 08:11:07 +0000

good job well done

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By: Albert van Bemmelen

Albert van Bemmelen — Fri, 17 Feb 2017 20:13:22 +0000

In reply to Robert Calk.

Yes indeed Robert. In electronics we often get only one chance to do it right!
Any other way results in semiconductor electron avalanches, burnt copper tracks or exploding e-caps.

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By: Robert Calk

Robert Calk — Tue, 14 Feb 2017 12:20:16 +0000

Good job, Albert. I agree - safety first.

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 13 Feb 2017 17:50:06 +0000

It is because Yogesh, as I also wrote in the article, caused by a collapsing TVS Diode that couldn't handle the momentary overvoltage. And therefore was destroyed and normally would have survived a very short 600 Watt Power Spike.
And when this happens they end as an open Diode, or as a shorting one. Or can even become out of spec.

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By: Albert van Bemmelen

Albert van Bemmelen — Mon, 13 Feb 2017 17:43:20 +0000

In reply to Ulises Aguilar Pazzani.

Thank you Ulises. It was a small fix but with great effect.

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