S15 doesn't power on

[mikeywith]

I have identified that the bridge rectifier is bad. And I am working on pulling it out but I'm looking on mouser and Google to find a new one but I'm not sure on the specs. It reads that it's 2506 but there is like 50 and they all look similar and have slightly different specs. Which one do I need?

You probably need  "GBJ2506 power rectifier 1000v 25A", that looks like this one



This will 99% work for you, I have yet to touch one but I know that https://www.zeusbtc.com only sell spare parts that work for mining gears, and they have this product https://www.zeusbtc.com/RepairDetails.asp?ID=101 and it matches the 2506 you got on yours.

Having said that and to be 100% sure, I suggest you talk to kevin or whoever is in charge, simply contact their support and ask if this would work on your APW8 or whichever PSU you are trying to fix, those guys know their stuff very well so I would trust whatever they got to tell you.

[rasmukri]

Talked to the people over there and  1 chip is $40 shipped. So I looked on AliExpress and found one for $10 shipped. Problem is the voltage. So apparently the last bit of the number is the voltage 2506=600v, 2580=800v, 2510=1000v. But they guys you sent me to have a 2506 listed as 1000v so I kinda don't trust them too much and will prob buy a 600v one off mouser. I'm gonna call mouser tomorrow and ask their opinion on the ratings for these chips and what they recommend because this is getting rather odd.

[NotFuzzyWarm]

But they guys you sent me to have a 2506 listed as 1000v so I kinda don't trust them too much and will prob buy a 600v one off mouser.

Fact is, assuming they just mislabeled the pn on their site the higher voltage one would be better as it will be better at withstanding any spikes on the powerline which is probably why zeus may use them. That said, yes 600v variant is fine, just not as robust against possible voltage spikes.

[mikeywith]

Sadly I can't vouch for the accuracy of the information on thier website regarding this product, it is simply something beyond my ablitity, for what we know it could be mislabeled, but I know that if they tell you it will work on APW8, it will most likely will, but $40 is way too much IMO, i mean there is no guarntee that this will be the only problem and that the PSU will work again, so investing $40 in that is something I wouldn't do, how much does the 600v on mouser go for? also why don't you get the 1000v?

[philipma1957]

yeah it is not like he is going to feed 900 volts on a constant basis.

if 600volts in is good.

then 1000volts in is also good.

also newark has a lot of parts

https://www.newark.com  maybe cheaper

and maybe jameco

https://www.jameco.com

[NotFuzzyWarm]

As well as Digikey https://www.digikey.com/

As for voltage ratings, Best Practice is to use semiconductors rated for at least 3x the peak of highest expected line voltage, when cost is a factor I usually will drop that to 2x peak.

Assuming a max rating of 240VAC in, for spec'ing components  I'd use 250v to cover occasional over voltage surges. Since Peak V=1.414*Vin RMS that works out to 353.5 volts peak and actually puts the 600v device at a good moderately conservative rating.

[rasmukri]

I bought a 2560 off mouser for $8 shipped. I'll post an update when I get it installed if that fixes it or not.

And I don't take it as a mislabeled website or anything with Zeus BTC either because I talked to him and I was told several times that the 2560 they sell is 1000v and they do not sell any 2510 chips.

[mikeywith]

I bought a 2560 off mouser for $8 shipped. I'll post an update when I get it installed if that fixes it or not.

And I don't take it as a mislabeled website or anything with Zeus BTC either because I talked to him and I was told several times that the 2560 they sell is 1000v and they do not sell any 2510 chips.

$8 is pretty reasonable compared to $40 at least, as far as the the support guy/girl institing that the 2560 bridge rectifier is able to handle 1000v it is pretty much b.s, I think whoever you were talking to doesn't understand much and they were simply counting on the label on the website, the owner of the website "kevin" surely knows well enough about electronics, he makes most of the youtube videos regarding "fixing miners" and I believe he is the head of the team that makes the "fixture tools" for all the antminer models, so I will make sure to deliver a message/complaint to him to re-label the product and educate his support team.

Anyway, keep us updated.

[rasmukri]

Got in the parts today and soldered it all together reassembled everything. And when I plugged it in as soon as the power cable hit the plug there was a nice big spark a pop the breaker tripped and now it has a classic burnt electronics smell.

So if I replaced the bridge rectifier and the main fuse where else in the line of this circuit board do I test for broken parts?

Or should I just scrap this one and wait till bitmain gets some in stock again and pay the $90 to get a new PSU?

[mikeywith]

Well at least it was a fun experince and you learned something, I have mentioned a couple of times that these PSUs are not meant to be fixed, this is what I was told by someone that I trust and I was hopping that he was wrong, but what just happened was another proof that unless it's an obvious broken fan on the PSU it isn't worth fixing.

So now I would take the fans out and keep them for future replacement and get a new/used PSU. Don't wait for bitmain because that might take forever, post in the market place and check on ebay, also get in touch with phill he is based in the US and he probably has a source or two.

Thanks for keeping us updated, was really hopping that you would fix it.