Avalon ASIC users thread

[h@shKraker]

Hey .... I got me another thought.  Since the part on the controller board that is getting HELLA hot is what appears to be a voltage regulator how about I just do a little reflow work and replace that part for my buddy?  As I see it that controller board isn't working now and the very worst thing that can happen is it still won't work.  What you folks think?

H@shKraker

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[ProfMac]

Hey .... I got me another thought.  Since the part on the controller board that is getting HELLA hot is what appears to be a voltage regulator how about I just do a little reflow work and replace that part for my buddy?  As I see it that controller board isn't working now and the very worst thing that can happen is it still won't work.  What you folks think?

H@shKraker

Please try it and report back.  We like to learn without risk.  If you document it with lots of photographs, you may establish for yourself an Avalon reflow work business.

[h@shKraker]

We like to learn without risk.

Yea ... wish I could be saying the same thing  .... BUT NOOOOOO  I had to be the person who tells a buddy to upgrade a PSU and NOT be there when he did it 

H@shKraker

[h@shKraker]

ProfMac,

You strike me as a person who's reasonably comfortable with a multi-meter.  If so could you use said multi-meter to find out how many volts are coming off of that voltage regulator on that Avalon Controller board?  That would REALLY make my job easier.

H@shKraker

[h@shKraker]

As a side note I *THINK* I've found the part I seek.  Even so ProfMac if you could get me a multi-meter reading on that output voltage for that part It'd be GREAT.  I *BELIEVE* it's mouser.com part# 701-SPX3940T-L-3-3  and I *THINK* the part is a 1.5A Low Dropout Positive Regulators, 3-pin package TO-263.  Time to lean into this pitch and order said part.  YIPPIEE 

H@shKraker

[ProfMac]

As a side note I *THINK* I've found the part I seek.  Even so ProfMac if you could get me a multi-meter reading on that output voltage for that part It'd be GREAT.  I *BELIEVE* it's mouser.com part# 701-SPX3940T-L-3-3  and I *THINK* the part is a 1.5A Low Dropout Positive Regulators, 3-pin package TO-263.  Time to lean into this pitch and order said part.  YIPPIEE 

H@shKraker

I do have a multi-meter.  I have the batch #2 Avalon.  I don't know what hardware version for the controller board, I'll have to shut down a miner and open it up to see.

Can you post a photo of your board, and indicate which part, or especially where a test point is that you'd like me to measure?

[fasmax]

From the looks of the part number you listed it looks likely to be a 3.3 volt regulator.
Checking the schematic of the controller U2 is a 3.3 volt regulator.
You should measure about 3.3 volt between ground and the regulator output.

[h@shKraker]

Fasmax,

That's about what I was guessing.  ProfMac, now that I have an additional person saying it's a 3.3v LDO I feel fine replacing the part and seeing if it gets me down the road.  Heck, the worst thing that could happen is .... nothing.  I'll take pics of my adventure when the part arrives from mouser so you can see my AWESOME solder work (Meh ....)

H@shKrker

[ProfMac]

Fasmax,

That's about what I was guessing.  ProfMac, now that I have an additional person saying it's a 3.3v LDO I feel fine replacing the part and seeing if it gets me down the road.  Heck, the worst thing that could happen is .... nothing.  I'll take pics of my adventure when the part arrives from mouser so you can see my AWESOME solder work (Meh ....)

H@shKrker

Thanks.  I was about to eat, then shovel snow, then get the multimeter from the car, then see if we have the same controller board.  This way is easier.

[h@shKraker]

Thanks.  I was about to eat, then shovel snow, then get the multimeter from the car, then see if we have the same controller board.  This way is easier.

Why shovel snow when one can experience the fun of the Snow Wolf??

[smoothrunnings]

Help!!!

My B1 Avy show [match_work_count29] => 0 in the logs. So I powered it down and took out the 4th module, the one I bought from Avalon-asic.com in the summertime and had a look at it. Other than the one board having silicon all over it nothing is burnt on any of the boards. I took a picture with my BlackBerry and am including it. All I can think of is that possibly the silicon is causing some issue with the one board, please let me know what you think I should?

Thanks

www.smoothrunnings.ca/images/module.jpg (just incase you don't see the image)

[fasmax]

So does the error indicate only 1 section of 10 chips is not working?

[smoothrunnings]

So does the error indicate only 1 section of 10 chips is not working?

Where do I see that?

[fasmax]

So does the error indicate only 1 section of 10 chips is not working?

Where do I see that?

From your log file. [match_work_count29] => 0
Looks like 1 sub unit not working. I assume the other 31 sub units show some hash count other that zero.

[smoothrunnings]

So does the error indicate only 1 section of 10 chips is not working?

Where do I see that?

From your log file. [match_work_count29] => 0
Looks like 1 sub unit not working. I assume the other 31 sub units show some hash count other that zero.

Yes all the other units are hashing just fine.

I am just trying to confirm if match_work_count29 refers to module 4 or does it change the order around once you add your 4th module to the Avalon and connected it?

[ProfMac]

So does the error indicate only 1 section of 10 chips is not working?

Where do I see that?

From your log file. [match_work_count29] => 0
Looks like 1 sub unit not working. I assume the other 31 sub units show some hash count other that zero.

I get that, but does it mean that count29 is on the 4th module or does it mean it a random sub, meaning I will have to pull out all the modules!?

It is the 5th one from the left on module 4, the one with the smudged stuff on it.

[smoothrunnings]

So does the error indicate only 1 section of 10 chips is not working?

Where do I see that?

From your log file. [match_work_count29] => 0
Looks like 1 sub unit not working. I assume the other 31 sub units show some hash count other that zero.

I get that, but does it mean that count29 is on the 4th module or does it mean it a random sub, meaning I will have to pull out all the modules!?

It is the 5th one from the left on module 4, the one with the smudged stuff on it.

The smug stuff is the silicon, which is why I asked many posts ago if it would matter and that Yifu told me in an email from support@avalon-asic.com that it wouldn't.. but I suspect it does. Is there any safe way of cleaning the circuits on the board?

[fasmax]

I think I agree with Yifu it should not matter.
You could cleaning it off with isopropyl alcohol and a few Q-tips or soft cloth.
Watch out of static electricity though and only us a little isopropyl no need to sock it.

[smoothrunnings]

I think I agree with Yifu it should not matter.
You could cleaning it off with isopropyl alcohol and a few Q-tips or soft cloth.
Watch out of static electricity though and only us a little isopropyl no need to sock it.

I will have to see if I can find that stuff.

[fasmax]

 Isopropyl is common, used in first aid. I found 91% Isopropyl at Walmart only a $1 or $2 for 32 fl oz.
I think I would go with the 91% they also sale a 70% strength.