Comments on: Paco – DER-2000 Automatic Voltage Regulator Repair

By: Paris Azis

Paris Azis — Mon, 12 Mar 2018 16:11:10 +0000

In reply to steve.

Hello Steve

I have just revisited this article after so long time and saw your request. Just check for cold solder joints first or even some connector with bad contacts. If after that everything seems to be O.K, then most likely your stabilizer uses a microprocessor which is stuck in the delay mode. In this case there is not much to do but replacing the M/P chip perhaps from another junk pcb..I wish this helps, no matter that long delay in answering you...

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By: steve

steve — Tue, 18 Jul 2017 16:08:32 +0000

Thanks Paris but can you help me with my stabilizer. it has always been on "delay" for days now. the unusual light is also on.
thanks

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By: Paris Azis

Paris Azis — Thu, 24 Mar 2016 17:57:45 +0000

In reply to Mendall.

Hello Mendall

Thank you too for your kind words and support.

Best Regards

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By: Mendall

Mendall — Sat, 13 Feb 2016 12:29:55 +0000

Thank you very much for the regular helpful tips. Please keep on the good work. I always find some supportive ideas in each and every subscription.
Thanks a lot.

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By: Paris Azis

Paris Azis — Tue, 01 Sep 2015 16:47:30 +0000

In reply to Paul Cohen.

Hello Paul

Visit please (for example) this site: http://www.electronics-tutorials.ws/transformer/auto-transformer.html, in order for you to understand the basic idea. In general, these devices are usually based on autotranformers and operate like the hand-adjusted variacs with the only difference being that the so called tap changing is done automatically,selecting voltage steps for correction by a logic circuit. This in turn can be very simply implemented by using only transistors. In any case they don't have the accuracy of the variac, staying very near to the targeted regulating voltage. The best of course would be to find such a device in a defective status and repair it. Then you will have the best chance to see how it works.
Anyway, I don't have any drawing to send you. I usually work "in blind". Therefore you have better to use the internet in order for you to seek the proper information answering your question (in total).
I hope this basic information of mine works for you.

Best Regards

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By: Paris Azis

Paris Azis — Mon, 31 Aug 2015 18:54:37 +0000

In reply to Vicken Mardiros.

Hello Vicken,

Thank you too for your warm wishes! Excuse my delayed answer as well.

Best Regards

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By: Paul Cohen

Paul Cohen — Tue, 02 Jun 2015 09:48:45 +0000

Please send a schematic diagram of the transformer and relays and explanation how they regulate the voltage.
Thanks

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By: Vicken Mardiros

Vicken Mardiros — Thu, 28 May 2015 19:12:15 +0000

thank you ALL for your comment and a special thanks to you Paris May God Bless you and your work

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By: Paris Azis

Paris Azis — Fri, 15 May 2015 13:38:47 +0000

In reply to Yogesh Panchal.

Hi Yogesh,

Thanks for your comment.

Regards

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By: Paris Azis

Paris Azis — Fri, 15 May 2015 13:35:31 +0000

In reply to Robert Calk.

Hi Robert,

Taking into account your last phrase, you are right doing so, but in cases like this one I faced it's really not important to act in this way.
What has been done is already there, hidden within the case of the device expecting you to see it.
Talking about a most likely damaged device, all checks will be done anyway, with the "sooner or later" parameter being of secondary importance.
On the other hand, we are focused on we are doing during the repair process and if these crazy things you refer to happen to appear we can unplug the device in proper time. If again not, the utility's automatic breaker of the house installation will drop instantly to save the case. (And yes, there is no possibility at all to find wire bridging in any fuse holder of my house's installation)!!

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