Re: Emerson AA27020L Failures

So scratch everything previously posted. I found out that the old meter I bought like 15 years ago had finally given up the ghost. I went out and bought a new fluke. And now I have more accurate measurements.

Across the biggest cap the voltage is 160.1 On a good psu it's coming up as 392.6.

Re: Emerson AA27020L Failures

I found a bunch of marked pins that said 12v. They all came up almost 0. Anything else I should look for? Looking for any and all suggestions.

Thanks

Re: Emerson AA27020L Failures

Sorry for the long delay. Personal issues got in the way of this project. So I finally got to look at these. The voltage at the big cap was 65V on both leads. I opened up a good PSU and found 65V on one lead and almost 0V on the other lead. Not quite sure what that means.

When I plug in the good psu it makes a single click like a relay. The bad units do not. I will look at these a bit more closely today based on the additional data from PeteS as I had not seen the update until now. Thanks.

Re: Emerson AA27020L Failures

Pics below of 4 different units.... Let me know if I missed anything.. Or if you need a 4K picture of one view....

Re: Emerson AA27020L Failures

Sure thing.. I can take some thorough photos and upload them. I have good and bad psu's does it matter if I take a pic of a bad one or a good one? I opened a bad one and don't see any apparent issues visually.

Hello

I have 15 failed power supplies, all Emerson AA27020L units. At $400 a pop to replace they are starting to get a bit expensive. These all failed in the last 6 months so I am starting to think there is some common failure with them. Does anyone have any info on them and why they fail so I can take a shot at repairing them. I haven't seen much on the net about them but I suspect someone somewhere knows something about their secrets..


TIA

Mike

Good morning

My daughter at college has a Vizio M261VP in her dorm room. She was complaining that it was acting funny. She would turn it on and the screen would be all rippled. She would unplug it for a bit. Plug it back in and the LED would flash for about a minute. She would turn it on and it would be fine. Recently I went to visit her and I went to turn it on. The screen became highly distorted. I shut it off and that was it. It wont turn on any longer. I've tested the PSU under load and it is normal. I suspect the issue lies in the main board somewhere.

Are there...

Re: New Members - please post your introductions here

Hi

My name is Michael. I am from Northern Calfornia. I have had a long time interest in electronics. I have done repair on motherboards, CRTS and many other types of products. Most recently my interests are LCD/LED televisions and monitors. Way too many make it to the dump and could have been saved.

I hope I can contribute and learn a lot too from this forum.