Looking for a Bestec ATX-300-12E circuit Diagram

[yosmany]

Re: Looking for a Bestec ATX-300-12E circuit Diagram

Hi, from the TPS3510 datasheet says the voltage at this pin to get Power Good signal should be at least 1.15V (typ). I currently have a PSU that works well, i.e. its outputs are correct (3.3V, 5V, 12V) but it does not put Power Good signal to a high level. Any ideas?

[ivtec]

Re: Looking for a Bestec ATX-300-12E circuit Diagram

[QUOTE=Drexter;95109]Hi guys,

I have a burned Bestec power supply, the problem was at the IC 8, it shorted due to humidity and burned itself, I was able to see the inscription on top of it and it says, A 635 M, not very sure about the M, and looking at a past thread I saw that someone said that this power supplies had the A6351 pwr chip, so i figured it was the one it burned out on my power supply. But after I reviewed the datasheet I saw that pin 1 is Source, pin 2 is GND, and pin 3 is Vin. Knowing that, before i solder it i saw that on the track where they are supposed to be solder is a continuos one. what I mean is that if i solder them pin 1, 2 and 3 will be shorted, pin 4 is separetly. So this is where I ask you guys, would it be that the chip I bought is not the right one? not the A6351, or the track is bad due the burn out?. Cause it doesnt make sence to me that the pins 1,2, and 3 get welded tougether. Thats why I was looking for a Diagram for the power supply but I just dont find it anywhere. Any suggestions?

By the way, english is not my native tounge so please bare with me if I dont express myself correctly or with the proper terminology.

Thanks,

Hi Drexter: i would not use that Bestec ATX-300-12E in any machine cause it has a long history of going bad and taking the mother board,CPU and other parts, myself i picked this E machines t3958 that someone threw on the curb ,i brought it home inspected for faults and power sup was dead,i had same model Bestec ATX-250-12E put there, after a couple of months running the pc would start but with blank screen i've started troubleshooting and after a hard time to find the fault,men ram ok,power sup ok HDD ok,i suspected the motherboard,but before i thew mother board away,i luckily had this CPU hanging around that i don't even knew i had,i swapped it since it was the same and fired it up and god bless; the machine worked ok,
now i did not want to risk another fault, i had a Compaq power sup hanging around in my scrap and i had to do some adapting so it would fit,one thing i notice is that the pc makes alot less noise,hope this COMPAQ will be a better one?

http://www.ebay.com/itm/COMPAQ-27139...-/151375975671

[Pentium4]

Re: Looking for a Bestec ATX-300-12E circuit Diagram

He has the 300-12E which uses an IC to generate the 5VSB which doesn't cause those problems