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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Measuring the primary side of the transformer. 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 time I opened one up.
Alpha & Omega Semicon/AOS AO – PDF Datasheet – MOSFET In Stock |
You really think the burnt spots are just due to bad solder joints? ALL 6 pins are shorted Thanks for the help and sorry for taking so long and the incomplete info. 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.
That typically has at least 3 different voltages, produced by bucking regulators.
I know this is an old thread but I figured since there is good advice here on the P I should see if my problem will add to it. If it is missing, check the fuse, etc.
AO4606 MOSFET. Datasheet pdf. Equivalent
I did reflow the transformer connections. I have included a pic of the chip.
I see no obvious issues visually. I have a KDS P monitor which does not work.
The rest of the buttons produce no set up or adjustment windows and I can see no video from my PC at all. Since I am a one trick pony on these I orderd a set of caps and replaced them hoping for the best. I am thinking the power supply card is fine but the video processor board is acting up. Using what you dztasheet said i started probing around.
AO Datasheet PDF, Alpha and Omega Semiconductor :
Originally Posted by Welchs You really think the burnt spots are just due to bad solder joints? It is usually capacitively coupled.
How did you know the part number is AO? I replaced all the caps on the board with new ones It did not work out, still have the same issue. Anyway this one has the good brand of Samxon for all but the big guy and that is a KM M but they rarly go bad from what I know. If you have 5V and 12V, check the logic board. I opened it up and found two burned areas on the power supply board see enclosed pic. Can you tell from the data sheet if D2 and D1 are shorted?
Does anyone know of any issues with these. I found one cap “near” the big filter cap which vatasheet “bad”. None of the buttons on the bottom work except the power ao46606 and off. So i guess its ok. So i will have to look a little deeper. Good thing i did since after i removed the caps i measured them using my cap meter on my fluke I thought the 2nd number was the part number.
In the areas that are burned i see this chip. Right now, when i power it up Originally Posted by Welchs SO this leads me to ask the question ALL of the inputs on the primary side be shorted? 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.
Thanks for the help, I did add a few pics of the board in case you can see something I do not. One end to the circuit while the other to the transformer pin.
Originally Posted by Welchs Right now, when i power datashete up 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.
Originally Posted by Welchs Another quick question There appear to be 6 pins on what i would call the primary side. Have you seen this before? The monitor is full bright all day long. Remove one of the primary winding pin and connect a datashset watt light bulb. I have a P that powers up fine. Thanks guys and thanks BAd-caps forum.