AO 30V Complementary MOSFET General Description Product Summary The AO uses advanced trench technology N-Channel P-Channel MOSFETs to provide excellent RDS(ON) and low gate VDS= 30V V charge. N-Channel:VDS=30V ID=6A RDS(ON) < 30mΩ (VGS = 10V) RDS(ON) < 42mΩ. AO datasheet, AO circuit, AO data sheet: AOSMD – Complementary Enhancement Mode Field Effect Transistor,alldatasheet, datasheet. AO Complementary Enhancement Mode Field Effect Transistor. AO Complementary Details, datasheet, quote on part number: AO

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Page 1 of 2. So i will have to look a little deeper. The rest of the buttons produce no set up or adjustment windows and I can see no video from my PC at all. I guess I will replace the four uf x 25v, two uf x 25v and the one uf x 25v and see where that takes me. There appear to be 6 pins on what i would call the primary side. But i cant seem to find a datasheet for this chip.

I did attach photos of the front and back of it.

AO 데이터시트(PDF) – Alpha & Omega Semiconductors

You really think the burnt spots are just due to bad solder joints? None of the buttons on the bottom work except the power on and off. They were the SAMXON brand which i remember reading on here that these were “bad” so i replaced the datsheet caps as well.

I replaced all the caps on the board with new ones I replaced this cap.

I looked into the fuse and connector advise and could not find any issues. Thanks guys and thanks BAd-caps forum.


AO4606 Datasheet PDF

I found one cap “near” the big filter cap which was “bad”. I am not an electronics wiz, for this issue I am more of a one trick poney. I have a P that powers up fine. How did you know the part number is Ddatasheet All it is is four buttons and an LED. Measuring the primary side of the transformer.

Originally Posted by Welchs Could it be the transformer? Originally Posted by chomot Post I know this is an old thread but I figured since there is good advice here on the P I should see if my dataasheet will add to it.

ALL of the inputs on the primary side be shorted? So i guess the chips are ok. I have fixed a lot of monitors by replacing the caps on the PS card but this will be my first with processor card issues.

If the bulb light and didn’t goes off suspect a shorted winding and if the light goes off, the winding is ok.

Originally Posted by Welchs You really think the burnt spots are just due to bad solder joints? I will get back to you with the results. One end to the circuit while the other to the transformer pin.

Complementary Enhancement Mode Field Effect Transistor

I looked at a few other datashet which were not replaced. So i guess its ok. The only button that works is the power and all the others do not give me any menu nothing. I checked between gate and drain, source and drain I found this article on how to test transformers see link below. A good method for checking a monitor with black screen and no power LED is to check the power supply outputs; typically 5V and 12V but this can vary.


Thanks for the help and sorry for taking so long and the incomplete info. Thanks for the help, I did add a few pics of the board in case you can see something I do not. I was looking at the signal board wich I also included a photo of and doing some searches on it but I could not find any silver bullet type fix for it. Show 40 post s from this thread on one page.

When i take a meter and measure the resistance from D1 to D2 i get a short In the areas that are burned i see this chip. Remove one of the primary winding pin and connect a 60 watt light bulb. It is usually capacitively coupled. I did reflow the transformer connections. I have fixed about a doz monitors now with only the knowledge of replacing the PS caps and have had good luck with this as I have always found the bulged caps every datasyeet I opened one up. It will since the presence of a video signal when I switch the note book PC I use for testing from onboard LCD to external and back but that is all it does other than make a nice large square desk light.

Originally Posted by chomot Post I looked into the fuse and connector advise and could not find any issues. SO this leads me to ask the question I am thinking the power supply card is fine but the video processor board is acting up.

I also measured the diode as shown in the data sheet.