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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ALL 6 pins are shorted Since I am a one trick pony on these I orderd a set of caps and replaced them hoping for the best. How did you know the part number is AO? 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. Also sorry for not mentioning that I did look at the panal when you brought it up, I should have said so but I forgot since I did not see anything about it.
I opened it up and found two burned areas on the power supply board see enclosed pic. I looked into the fuse and connector advise and could not find any issues. ALL of the inputs on the primary side be shorted? Originally Posted by Welchs Another quick question I will get back to you with the results.
Datsheet 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. Could it be dataaheet transformer? Have you seen this before? 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. Using what you guys said i started probing around.
All it is is four buttons and an LED. Originally Posted by Welchs SO this leads me to ask the question Does anyone know of any issues with these. I found this article on how to test transformers see link below. I also measured the diode as shown in the data sheet. I have included a pic of the chip.
AO_PDF Datasheet Download IC-ON-LINE
They were the SAMXON brand which i remember reading on here that these were “bad” so i replaced the other caps as well. Good thing i did since after i removed the caps i measured them using my cap meter on my fluke Originally Posted by Welchs thanks!!!!!! So i guess its ok. So i will have to look a little deeper. There appear to be 6 pins on what i would call the primary side. I have a P that powers up fine.
SO this leads me to ask the question 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.
So i guess the chips are ok.
AO4606 – Complementary Enhancement Mode Field Effect Transistor
If you have 5V and 12V, check the logic board. I did reflow the transformer connections. If the bulb light and didn’t goes off suspect a shorted winding and if the light goes off, the winding is ok.
A good method for checking a monitor with black screen and no power LED is to check the vatasheet supply outputs; typically 5V and 12V but this can vary.
Sorry for the long lead, I am have some time now to get back to this. Show 40 post s zo4606 this thread on one page. I looked at a few other caps which were not replaced.
It did not work out, still have the same issue.
AO4606 Datasheet PDF
Thanks for the help and sorry for taking so long and the incomplete info. The only button that works is the power and all the others do not give me any menu nothing. The monitor is full bright all day long. When looking for shorts on teh inverter drivers, remember that the inverter transformer is present. I checked between gate and drain, source and drain I have a KDS P monitor which does not work. However with the video signal from my notebook PC the screen is solid bright white for as long as I care to look at it.
I see no obvious issues visually. You really think the burnt spots are just due to bad solder joints? 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 problem will add to it. Originally Posted by Welchs Right now, when i power it up Measuring the primary side of the transformer.