Wow this is an Old Post LOL, I made it back in the days when I hardly knew anything. You're in luck though, now I'm a top industry expert in this field(and instructor). A test jig is a literally S17 series control board that has custom software on it to test hashboards during the repair process(with a fancy, though redundant, LCD display added & case). Every board, since I believe the S15 series, have an EEPROM on each hashboard identifying it to the control board, it allows the control board to reject model mismatches and contains information on the ASIC and it's speed etc. The code editor...

Re: ANTMINER S9 power circuit


Thank You! I could not find that datasheet anywhere!(getting replacements might be even harder). I did discover that the PIC is operating just fine but the buck converter controller is either not functioning or is not being enabled.

Any Ideas as to why the transistors are there? Datasheet says the chip has MOSFET drivers built in....

Re: ANTMINER S9 power circuit


Very basic arduino scope, bench supply, DMM, and LCR meter. I have a 100A ammeter and ICP PIC programmer; plus repacement MOSFETS, CAPS, and PICs on the way....

I am repairing the board of a bitcoin miner that has blown MOSFETS. I need help deciphering the buck converter operation that supplies the power to the hashing chips. It involves DB9305 DC/DC converter and Infineon BSC0901 MOSFETs probably managed by a PIC chip(on reverse side also). Any insights would be appreciated(a probable schematic would be amazing).

I suspect the PIC is blown turning on the MOSFETS 100% of the time, exceding their current limits on this 400W board. External power is a 1300W 12V DELL server PWS and comes in at the top....

Re: Dell ATX PWS Stupidity

Thanks, I hadn't thought of a Thermaltake product as cheap but now I know it's a totally unreliable way to test a PSU. I guess next I'll buy several cheap (LED or analog? IDK) voltage readouts on ebay and grab a bunch of headlights from the junk yard and build a nifty test fixture for the future.

At long last, we have found you.

I'm a PC technician and have used several ATX power supply*testers on at least two DOA Dells,*so here's my quandary. The PWS tested good on both occasions(most recently with a Thermaltake Dr Power II), problem is, They were both bad. Last week I even ordered a new motherboard(I now have to return)*because I was fooled into believing the tester. Turns out it was the PWS! A new(old ) Dell PWS fixed the problem.

And Here's the kicker...I think The motherboard knew the PWS was bad and didn't/Wouldn't/couldn't*power it on(Dr Power II powered it on just fine.).

Why did...

Re: New Members - please post your introductions here

Allo, I'm a Purdue Technology major planning a career in board repair. I hope this broke ass newb can get all the sch and .brd files I need to learn the trade.
Cheers,
Jay