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1  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: May 22, 2021, 01:05:30 AM
Sorry, didn't notice the large moq
 This will work.

https://www.digikey.com/short/f02vj377
2  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: May 20, 2021, 11:30:10 PM
Yup, those resistors are 33ohm 0201s, and the caps are 1uf 6.3V 0402s.

No way to remove or reflow the ASIC chip and not reflow the caps and resistors surrounding it. The large pads on the bottom of the chip sink heat to the board too well to be able to heat it up to the melting point and not melt the solder on the surrounding components.
3  Bitcoin / Mining support / Re: Where to fix your Asic miners. on: May 20, 2021, 12:53:56 AM
I received my s17 back today plugged it in and it is working perfectly.
It is hashing exactly where it should be.

Could you share some more details? What did they say was wrong, and how much did it cost?
4  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: May 20, 2021, 12:02:18 AM
Those are most likely 33ohm resistors. If not, they are 0 ohm. What leads on the asic do they connect to?



I'm pretty sure the ones I circled are 0201 resistors, ridiculously small ... like grain of sand small. It is defiantly a pain in the ass to get these on, you need some good tweezers.

https://www.digikey.com/en/products/detail/panasonic-electronic-components/ERJ-1GNJ330C/8343545

https://www.digikey.com/en/products/detail/panasonic-electronic-components/ERJ-1GN0R00C/3982319

The caps are either 1uf or 0.1uf. I think they are 0402 size. These should work.

https://www.digikey.com/en/products/detail/kemet/C0402C104K4RACTU/789653

https://www.digikey.com/en/products/detail/cal-chip-electronics-inc/GMC04X7R105M6R3NT/13908742




5  Bitcoin / Mining support / Re: Antminer T17 - Stuck on troubleshooting where the error is on: May 16, 2021, 12:13:58 PM
If I understand correctly, I can apply 21v to the boards metal clamps (with +/- on the correct place offcourse), and then measure the testpoints on the board?

The board won't do anything unless the correct commands are sent from a control board. It needs to command the pic microcontroller to turn on power to the chips on the board, and then it needs to send a command to the chips in order to see any signals at the test points.

It is possible to just use the control board from the miner, and make up some cables (need to be 4awg to 6awg cables) to run from the psu to the hashboard so you can run it on a bench so you can access the test points. It is very slow though because it takes so long to boot up and then you only get 3 chances to measure anything when it is checking the ASIC count, after the 3rd try it just shuts down the board and you need to start again. The normal Bitmain style test jig (that is just a S17+ control board with special firmware), does the same thing except it boots a bit faster and then runs a test pattern to verify the operation and performance of each chip if all chips are found. For troubleshooting a board that isn't finding all the chips, it is still very slow, maybe a couple of minutes per round of 3 ASIC counts.

The tester from Asic.Repair (https://tester.asic.repair/en), far superior to the standard test jig for troubleshooting boards that aren't finding all chips. It allows you to run the ASIC count test continuously about once a second with no boot-up time. I have both and rarely use the standard test fixutre any more.

6  Bitcoin / Mining support / Re: Antminer T17 - Stuck on troubleshooting where the error is on: May 09, 2021, 01:06:08 PM
From the log you posted, it looks like none of the boards are working when they are all connected. For the hashboard to work, all 30 asics need to be found.

Code:
2021-05-08 20:26:52 driver-btm-api.c:1069:check_asic_number: Chain 0 only find 0 asic, will power off hash board 0

2021-05-08 20:27:24 driver-btm-api.c:1069:check_asic_number: Chain 1 only find 12 asic, will power off hash board 1

2021-05-08 20:27:55 driver-btm-api.c:1069:check_asic_number: Chain 2 only find 0 asic, will power off hash board 2

The "get_average_voltage" messages shows the measurement from each hashboard of the PSU voltage. There is only one main supply voltage, so the three boards are measuring the same supply voltage. It could be the PSU is just shutting down and the 3 measurements are showing the voltage drop after the supply shut down, notice from the timestamps that there are a few seconds between each reading.

Code:
2021-05-08 20:26:18 power_api.c:86:get_average_voltage: chain[0], voltage is: 17.034316
2021-05-08 20:26:20 power_api.c:86:get_average_voltage: chain[1], voltage is: 16.513857
2021-05-08 20:26:23 power_api.c:86:get_average_voltage: chain[2], voltage is: 15.558662
2021-05-08 20:26:23 power_api.c:97:get_average_voltage: aveage voltage is: 16.368945
2021-05-08 20:26:23 power_api.c:182:set_iic_power_by_voltage: now set voltage to : 17.000000 

From the little info you've given, I'd guess the most probable problem would be a bad PSU or input voltage as mikeywith said. Although I'm not sure how one board would work when the log you posted shows the PSU turning off before the boards start hashing. Before they start hashing, all 3 boards together are using much less power than a single board would use while actually hashing.

We might be able to get a better idea of what the issue is if you post some more logs and screenshots of the status screen.

  • Log of 1 board working when all 3 boards are connected
  • Logs of each board working when connected indiviudally

Also, what is the AC voltage you are powering these with? You should verify with a voltmeter.
7  Bitcoin / Mining support / Re: Change ASIC Chip of Hashboard to be profitabler on: May 04, 2021, 12:49:57 AM
Firmware is cheap and easy to do, best to not believe what hackers say about the illegal ones they release to make people think it's ok to pay them a lot.

Guess I didn't word that very clear... Didn't mean "even more than the PCB design", just additional. Might not be very difficult, but you think you can find someone to do it for under a few thousand $? I'm used to paying $150 an hour for good experienced software developer contractors.

If you filed a lawsuit against Bitmain, I wonder how much $ you'd need to be a big enough pain in their ass to motivate them to actually do anything. Probably not possible with the current USA administration, but cutting off all imports to the USA of miners violating the cgminer license would be a pretty powerful motivator. Do you know for sure that they are violating it? If they were smart, bmminer would have been developed as a completely different app not derived from cgminer at all.
8  Bitcoin / Mining support / Re: Change ASIC Chip of Hashboard to be profitabler on: May 03, 2021, 08:19:01 PM
Nah, I don't think the boards can be reverse-engineered without breaking at least a couple of them while experimenting and bricking even more of them after that with unstable firmware.

I think bricking a few boards would be the least of your worries .... that's only several thousand $... that's nothing compared to how much it would cost to design and layout a new PCB, and then even more for doing some firmware.
9  Bitcoin / Mining support / Re: Change ASIC Chip of Hashboard to be profitabler on: May 03, 2021, 04:47:31 PM
Not possible, pinouts of the chips have changed.  Don't have the pinout for the S19 chip, but since the S17 is different from the S9, I seriously doubt they went back to an old pinout. Also, they run at different voltages. So PSU won't work, control board won't work, and hashboards won't work.

I guess it would be technically possible to reverse-engineer a S19 hashboard, design a new PCB layout that would fit into a S9 case, buy new PSUs and control boards, hack the firmware to support a different # of chips since I'm sure you're not going to fit 114 chips on a S9 format .... all to be able to re-use a couple fans and a case ...lol. Good luck with that...

10  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: May 03, 2021, 11:58:01 AM
I'm not sure solder melting point is the issue with the original assembly. I'd guess either poor temperature profile or just faulty/expired solder paste. Many of the chips I remove show signs on the large pads that the solder never flowed enough.
11  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: May 02, 2021, 01:30:01 AM
Yeah ... pretty sure the chances of working with half the leads disconnected is pretty low... lol.

I use the same chipquick for the chips as well. Don't know what they use in the factory, but I think in some of the Bitmain repair manuals it mentions low temp (138DegC) for everything. I like using it because you can keep the temperatures lower so less chance of destroying a board. Although it does make putting heat sinks on a bit tricky, would be easier if the chips were attached with higher melting point solder.

12  Bitcoin / Mining support / Re: Error overheated chip t17+ on: April 28, 2021, 07:27:42 PM
From what I can tell from the log, the miner starts mining and it takes about 3 minutes for the chip to overheat.


AntMiner

Chain#   ASIC#   Frequency(avg)   Voltage   Consumption (W)   GH/S(ideal)   GH/S(RT)   Errors(HW)   Temp(PCB)   Temp(Chip)   

3               44                        450                  16.5   494   13,305.60   7,857.16   0   43-49-47-53   71-61-80-62   Auto-tuning

I'm assuming that was captured during the 3 minutes, and one chip temp is already up to 80 dec, significantly higher than the others. So it looks like it runs for a little bit, and that chip just keeps getting hotter until it hits the 90Deg limit and shuts down. You could confirm this by just looking at the status page and refreshing constantly during bootup, monitoring the temperature. If it just gradually rises to failure, then I don't think it looks like a faulty sensor, but just a bad ASIC or a bad connection to its heatsink.

These miners have a lot of issues with heat sinks, many times the copper plating that interfaces the chip to the solder that holds the heatsinks on delaminates, which can cause a little gap that will kill the efficiency of the heatsink. It is very possible that if you shake that miner a bit, or if you push on that heatsink, it will just fall right off. I assume you've already checked that there isn't a loose or missing heatsink? And that the heatsinks are clogged up with anything?

You may be able to limp along if you block the 2 empty slots somehow. With them blocked, a lot more air will be forced through the heatsinks and it might be enough to keep it below 90.
13  Economy / Computer hardware / [WTB] Bitmain 17 series case parts on: April 28, 2021, 12:39:36 AM
Specifically looking for control board enclosures... I need about 30 or so of them.

14  Bitcoin / Mining support / Re: Error overheated chip t17+ on: April 20, 2021, 10:28:29 PM
So you are running with only one hashboard in the miner? If so, the cooling will not be ideal. The air will take the path of least resistance which is right down the empty slots instead of being forced thought the heatsinks.
15  Bitcoin / Mining support / Re: T17 issues Socket connect failed: Connection refused on: April 18, 2021, 01:01:19 PM
Please post the full log. Just copy the whole text and paste it into a code block ... this: , produces this:
Code:
This is code

Have you tried different pools? Pools like Nicehash can sometimes be difficult to set up and can cause issues like you describe, so to get a baseline try a standard well known pool, like Viabtc, Slush, Kano (if you are using factory firmware), F2pool, etc..
16  Bitcoin / Mining support / Re: T17 Capacitors Hashboard loose on: April 17, 2021, 06:21:17 PM
Thanks for giving us the update.

Heatsinks on 17 series miners are not glued on, they are attached with solder. Most of the time I see heatsinks that have fallen off, it's because the copper plating on the top of the chip has delaminated. Without the plating, it is not possible to solder it back on. You could try to glue them on with any thermally conductive adhesive. Can't say if or how well it will work. I always replace chips that have lost their plating.

The thermally conductive epoxies I was able to find technical datasheets on had much worse performance than solder. Low temperature solder (Sn60Bi40) solder conducts heat about 30 times better than the epoxy. So the epoxy might not work well enough and the chip may overheat. If it isn't on one of the 4 chips that is monitored for temperature, it could get hot enough to permanently damage the board, or melt the solder so the chip will slide out of position.

Here's a link that has the thermal conductivity of many solder types: http://alasir.com/reference/solder_alloys/

And here's a thermally conductive epoxy: https://www.mgchemicals.com/downloads/tds/tds-8329tff-2parts.pdf
17  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: April 15, 2021, 01:17:47 AM
Nope, no need to program the eeprom unless using stock firmware.

It will detect and read temp sensors.

If the pic is bad, nothing will work, so there isn't really anything to detect.

As far as how to replace chips, there is no correct answer. But I no longer tin the chips with a stencil. I was never able to reliably get a chip on that way and had to drag reflow the connections with an iron, or add solder paste and clean up after. So I started just adding some solder to the main power pads and not bothering with any solder on the pins. I leave solder on the PCB, and then add flux and drag-reflow the pins with an iron after flowing with a hot-air tool.

Every set of tools and every person's skills are different though, so you really just need to try different approaches and figure out what works the best for you and the tools you have.
18  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: April 12, 2021, 12:54:38 AM
I have seen a few heatsinks come loose without taking the copper plating with it, but for the most part I'd say the main reason why the heatsinks come off is because the copper plating delaminated. The delamination is a manufacturing defect, you can clean solder off without taking the plating off if the chip is not defective. This is what chips with delaminated plating look like:



Sometimes the heatsink was never attached very well, and the solder will just break off, or the chip got hot enough that the solder melted. So in those cases, the solder will still be on the chip, and you can clean it up and re-attach the heatsink with no issue. I also don't generally remove all the solder on the chip, I just add a glob of flux and reflow the solder with a soldering iron (with a good-sized chisel tip) so it is smooth and covers the whole chip. If some or all of the copper plating is gone, then the solder will just bubble up and it will be impossible to get it to flow over the whole surface of the chip.
19  Bitcoin / Mining support / Re: Changing S17+ hashboards between miners doesn't mine. on: April 10, 2021, 06:17:36 PM
I don't think that is an accurate way to measure what fee they are charging. I think you'd need to compare the #s to the stock firmware running the same frequency/voltage to get an accurate comparison. Also not sure that 1 day is long enough to get a measurement accurate enough to see a 1% difference. Just look at the daily average of any miner over time. I just checked the daily average graph on a worker on Viabtc and it varied >3% over the past couple of weeks.
20  Bitcoin / Mining support / Re: S17 Pro Back from Repairs or Disrepair. on: April 09, 2021, 11:28:44 PM
The purpose of the copper plating is to accept the solder, without it the solder won't flow. Think of water on a hydrophobic surface (like a windshield treated with rainx). So you could probably attach a heatsink with solder, but it would not make good contact because the solder will not flow over the whole surface of the chip. You could attach a heatsink using a thermally conductive adhesive, but that has other issues, like how to remove the heatsink if there is an issue with the chip or its connections.  So I always replace chips that have lost their copper plating.

I haven't done a lot of swapping chips between boards, most of the time I'm not going to take the risk of installing a chip that may be faulty. Just not worth the cost of a new chip to spend the time of putting it on only to have to remove it and reinstall another one. But the only advice I have for that is that you should either clean the solder off the chip or the board. If there are solder bumps on the chip and the board, it is very difficult to get the chip aligned, and when you heat it up it will shift. So I'd probably leave the solder on the chip and use solder wick to clean the solder off the board.

Workbench update...

I added a benchtop DMM to my workbench a few weeks ago ... I'm loving it so far. Don't really need the accuracy, but the time to make measurements is way less than the portable I was using and that time adds up.

Also pick up a Hakko FX951 soldering iron. It works great, but I'm now curious about a Thermaltronics iron (which is basically Metcal clone, started by previous Metcal employees).



Looks like AD and AG chips are all gone, but AI chips are still available, https://www.aliexpress.com/item/4000098330595.html?spm=a2g0s.9042311.0.0.d9754c4d7ET3MD
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