Swedish ASIC miner company kncminer.com - page 39.

lightfoot

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I fix broken miners. And make holes in teeth :-)

Quote from: GenTarkin on February 13, 2016, 01:32:09 PM

Quote from: wolverine5pl on February 13, 2016, 07:48:58 AM

Pictures of board:

HOLY SHIT those 2 dies got way way way to fucking hot. Most likely fried the package substrate or something along those lines.
If its not working, that would be why.

I really wish KNC would have designed the dies with ondie thermistors. So we knew what the fuck the actual temps of the dies are...

Yeah I was thinking that. When I say I have seen burned titans this is what I mean...

*However* (and here is the magic however button) the chip itself doesn't have any of the +12v lines going to it. Therefore it should not be crowbarring the supply. It could be a blown FET on the power supplies, or a blown cap that's not showing up, but it's not just the chip.

The chip has the .7 volt supplies going to it, some SPI lines one for each quadrant and the jury is still out as to what else it does.

GenTarkin

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Quote from: wolverine5pl on February 13, 2016, 07:48:58 AM

Pictures of board:

HOLY SHIT those 2 dies got way way way to fucking hot. Most likely fried the package substrate or something along those lines.
If its not working, that would be why.

I really wish KNC would have designed the dies with ondie thermistors. So we knew what the fuck the actual temps of the dies are...

psy112

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psygambler

Quote from: The Avenger on February 13, 2016, 07:37:47 AM

Quote from: psy112 on February 13, 2016, 06:34:10 AM

strange because I got this from my lawyer "Finally, the date for the main hearing is set to 16, 17 and 18 (half day) Mars 2016."

The first line reads "Nacka District Court rejects class action against KnCMiner", so I assumed it failed? But it's hard to tell from that translated article what happened.

But if you say prosecutions against kfc are still going ahead, that's good news.

Hopefully they'll have their day in court before they all murder each other Cheesy

I read the original article, since I'm swedish. But it said the same thing. Have sent the article to my lawyer, so have to wait and see what he says about it.

lightfoot

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I fix broken miners. And make holes in teeth :-)

Quote from: dropt on February 13, 2016, 12:44:14 AM

Do you have a pic of it? Do you know what pins you're looking at, just don't know which is which?

It's tiny, getting a picture even with a 6x loupe on the camera is a job. These guys have a picture of one of the parts, but no description on what it is:

http://www.aliexpress.com/item/Transistor-IC-chip-SMD-6-pin-IC-THR-SOT23-6/32240467148.html

Looking at the grainy picture I have so far of the part it could be a 2 as the first letter.

Maxumark

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Quote from: BitcoinPappi on February 12, 2016, 09:42:36 PM

Any pointers on repairing burnt power connectors on cubes ?

Here is the best, quickest, and easiest way to deal with a burnt connection in my opinion. It also allows about 3/16in additional contact between the power connector and the pins. Sorry its a bit of a hack. and you must absolutely be sure to put the connector on clip side up, ground wires up since the will not be a receiver connector on the board anymore.

The burnt connector will be brittle, and easy to break up with a pair of side cutters. Do it in small pieces until just the very bottom is left. Then pry up gently with a screwdriver to dislodge the 2 plastic retainers and it will slide right off. Then take a piece of 220 grit sand paper to clean up the pins. Clean everything up and carefully push the power connector on the bare pins while using a flashlight to make sure its on right. It will now go further on the pins making a better connection.

wolverine5pl

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Pictures of board:

The Avenger

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Quote from: psy112 on February 13, 2016, 06:34:10 AM

strange because I got this from my lawyer "Finally, the date for the main hearing is set to 16, 17 and 18 (half day) Mars 2016."

The first line reads "Nacka District Court rejects class action against KnCMiner", so I assumed it failed? But it's hard to tell from that translated article what happened.

But if you say prosecutions against kfc are still going ahead, that's good news.

Hopefully they'll have their day in court before they all murder each other Cheesy

psy112

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Activity: 346

Merit: 250

psygambler

Quote from: The Avenger on February 13, 2016, 05:51:19 AM

So the class action against kfc failed??
https://translate.google.co.uk/translate?hl=en&sl=sv&u=http://img1.nsd.se/nyheter/boden/avvisar-gruppstamning-mot-kncminer-9855502.aspx&prev=search

strange because I got this from my lawyer "Finally, the date for the main hearing is set to 16, 17 and 18 (half day) Mars 2016."

The Avenger

hero member

Activity: 798

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So the class action against kfc failed??
https://translate.google.co.uk/translate?hl=en&sl=sv&u=http://img1.nsd.se/nyheter/boden/avvisar-gruppstamning-mot-kncminer-9855502.aspx&prev=search

The Avenger

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Seems one of the employees at the knc datacentre tried to murder someone. Maybe the police interviews will uncover widespread criminality? Tongue

https://www.reddit.com/r/btc/comments/45hgkz/attempted_murder_at_kncminer_in_sweden/

wolverine5pl

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Quote from: lightfoot on February 12, 2016, 07:52:10 PM

Quote from: wolverine5pl on February 12, 2016, 04:35:39 PM

I recently bought titan on eBay. One cube got damaged Durring transport. Heatsink lose (screw holding it got lose) which i think is common. I managed to put it back with some DIY. Was hashing fine. Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube. Any idea why? How to fix it?

Um. What speed were you hashing at? And um... How did you put the heat sink back on?

And um.... can you take a picture of the board? I run a repair service for sad Titans, but I'm wondering what happened to this one.

when it arrived

after trying to fix it:

did run for a while fine. when i turned it off and started later what happens is PSU shuts down. and psu is ok. tried 3 different.

psy112

sr. member

Activity: 346

Merit: 250

psygambler

I looked through the swedish video, looks pretty simple and I have the exact same issue with higher heat on my 1-2 chips. The question/wondering is, I'm in the lawsuit again KNC and I'm not sure If I'm allowed to alter the machine at all? Anyone knows?

Quote from: Searing on February 13, 2016, 02:13:01 AM

Quote from: wolverine5pl on February 12, 2016, 04:35:39 PM

I recently bought titan on eBay. One cube got damaged Durring transport. Heatsink lose (screw holding it got lose) which i think is common. I managed to put it back with some DIY. Was hashing fine. Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube. Any idea why? How to fix it?

the below may help (you may have already seen it)

swedish guy videos

see swedish one first (better video)

and english one 2nd (not as good on details)

I assume this is what you mean by 'heatsink and paste" stuff

https://www.youtube.com/watch?v=O-RBI4am-wY

https://www.youtube.com/watch?v=-G_zcJ0vbOw

on a side note many have said on the old knc forums that issues with lousy paste job of thermal paste on the cubes on 1st couple months titans caused
or contributed to dead die on cube issues on the 1st batch

anyway you are probably referring to some other techy thing ...for what the above is worth as a repeat on the thread

Searing

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Clueless!

Quote from: wolverine5pl on February 12, 2016, 04:35:39 PM

I recently bought titan on eBay. One cube got damaged Durring transport. Heatsink lose (screw holding it got lose) which i think is common. I managed to put it back with some DIY. Was hashing fine. Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube. Any idea why? How to fix it?

the below may help (you may have already seen it)

swedish guy videos

see swedish one first (better video)

and english one 2nd (not as good on details)

I assume this is what you mean by 'heatsink and paste" stuff

https://www.youtube.com/watch?v=O-RBI4am-wY

https://www.youtube.com/watch?v=-G_zcJ0vbOw

on a side note many have said on the old knc forums that issues with lousy paste job of thermal paste on the cubes on 1st couple months titans caused
or contributed to dead die on cube issues on the 1st batch

anyway you are probably referring to some other techy thing ...for what the above is worth as a repeat on the thread

dropt

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Quote from: lightfoot on February 12, 2016, 11:53:38 PM

By the way if anyone has the brain-search power to figure out what a TSOT6 chip with Z17C or Z17R or THR is, I would appreciate. I'm thinking linear power regulator to run the hotel circuits on the chip, but without specs I can't figure out what is a signal input and what is an output to the chip's cores.

Note: This is not what I am looking for here....

Do you have a pic of it? Do you know what pins you're looking at, just don't know which is which?

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

By the way if anyone has the brain-search power to figure out what a TSOT6 chip with Z17C or Z17R or THR is, I would appreciate. I'm thinking linear power regulator to run the hotel circuits on the chip, but without specs I can't figure out what is a signal input and what is an output to the chip's cores.

Note: This is not what I am looking for here....

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

Quote from: BitcoinPappi on February 12, 2016, 09:42:36 PM

Any pointers on repairing burnt power connectors on cubes ?

You need full pre-heat in order to heat that part of the board up enough to have a chance of getting it off without pulling up the VIAs. Mask the chip with aluminum foil under the board and give it everything you can, 375 degrees if possible. Then heat at 450c to get it off.

BitcoinPappi

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Any pointers on repairing burnt power connectors on cubes ?

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

Quote from: wolverine5pl on February 12, 2016, 04:35:39 PM

I recently bought titan on eBay. One cube got damaged Durring transport. Heatsink lose (screw holding it got lose) which i think is common. I managed to put it back with some DIY. Was hashing fine. Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube. Any idea why? How to fix it?

Um. What speed were you hashing at? And um... How did you put the heat sink back on?

And um.... can you take a picture of the board? I run a repair service for sad Titans, but I'm wondering what happened to this one.

wolverine5pl

sr. member

Activity: 437

Merit: 250

I recently bought titan on eBay. One cube got damaged Durring transport. Heatsink lose (screw holding it got lose) which i think is common. I managed to put it back with some DIY. Was hashing fine. Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube. Any idea why? How to fix it?

mindtrip

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Activity: 1167

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Quote from: lightfoot on February 11, 2016, 10:35:22 PM

I am starting to come to the conclusion that dead dies on Titans might be related to the heat sink compound being splatted on the chip a bit oddly. So far it's not related to the power supplies, main caps, filtering caps, or the fpga's. It still *MIGHT* be related to the very small chips that sit between the 10 pin connections and the hashing chip, but I do not think so.

Anyone know what the very small chips on the board are?

I am pretty sire the small chip son the board are fuses I blew one on one of my cubes

Topic: Swedish ASIC miner company kncminer.com - page 39. (Read 3049511 times)