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SG135 C2000 BUG

RobertRoskaric over 4 years ago

Hello, I recently bought a used SG135 rev.1 which has AVR54 bug (I found out about this bug after I buy it).

For others vendors I found a possible fix, but not for Sophos.

There are two (as far as I know) fixes:

1. Replace a atom c2xxx with C0 revision

2. external pull-up resistor (18.2k to 10k), from LPC_CLKOUT0 or LPC_CLKOUT1, tied to 3.3V

Did someone tried to fix this bug? (I use home license, so I don't have any agreement with Sophos).

Best regards,

Robert

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0 Michael Arlt over 4 years ago

Wrote the company which most probably produced/distributed the board DNB1150-PEX Ver: B, asking nice for the schematics or any helpfull info to bypass the intel c2xxx bug. Also mentioned some hints regarding the easy fix for the synology boards. Owning such a synology 2415 by myself and got it back to life soldering just the capacitor. Also helped a friend of mine to fix his syno aswell, which is also back to life. The issue i have with my UTM 125 is most probably the same issue since it behaves like the syno did. So i guess my 125 does only have the c2xxx bug and not any other issue.

If someone of you needs any more pictures ... i can take them easily from a Board DNB 1150-PEX Ver: B except from the CPU or the DIE since i want to keep the heatsinks where they are
Not with a good camera, just with mobile (OnePlus 6t)

BTW: nexcom is selling a similar Product http://www.nexcomusa.com/Products/network-and-communication-solutions/cyber-security-solutions/desktop-x86-based-appliance/desktop-x86-based-appliance-dna-1150/Specifications

Regards, Micha
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0 Marcelo Clare over 4 years ago in reply to Michael Arlt

Hi Michael,

Thanks for sharing this information with us.

Did you manage to install the capacitor on your 125?

The problem that we have at the moment is the lack of schematics to be able to identify where to install the jump to fix the c2000 bug.

Cheers,

Marcelo Clare
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0 Michael Arlt over 4 years ago in reply to Marcelo Clare

Hey Marcelo,

i did not play around with the 125 yet. Even when it came to repair the Syno's, i did dig around to not break them. Im not experienced with electronics, measuring and soldering stuff at all. So the only thing i can offer to you guys are informations i probably get. Lets see, if i get something back from them. At least i was asking them kindly for the schematics, but i doubt the will provide.

Regards,

Michael
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0 Marcelo Clare over 4 years ago in reply to Michael Arlt

Hi Michael, how are you?

Any news about the schematics?

Cheers,

MC
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0 Harald Meier over 4 years ago in reply to RobertRoskaric

Hi guys,

after I tried to solder a modwire on the c910 for further testing the conducter path with the condensator was falling apart...

Since it is not repariable and my SG135 (out of warranty) is also bricked because of the SC2000 bug, I decided to give the world little bit back and desoldered the atom cpu and cleaned the BGA pads and re-fluxed them as good as it gets..

Maybe someone of you find the appropriate trace from the Atom CPU BGA pin to any solder pad around the cpu. I didn't trace anything yet, just desoldered and made some photos so far, nothing else....

Where is Pin 51????

If anyone sees a solution to our problem ( I got also a second SG135 as well with the same error......) please feel absolutely free to answer this post and share your knowledge and discovery :-)

Cheers

P.S.: If you open the images in a new tab, they are even bigger.... if you want I could give you also a direct 24mpixel download link for the pics. Just PM me.
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+2 DanielSchmitt over 4 years ago

Hello,

i found this 150 Ohm Resistor in a refurbished SG125.

;)

With that Fix i brought my broken SG125 back to Life

Cheers

Daniel
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+1 Harald Meier over 4 years ago in reply to DanielSchmitt

Hi Daniel,

thanks a lot for that. I didn't try it yet, but I will in the next days and report back.

I uploaded your pic as well, so the forum does not rely on your google link, if thats okay for you?

Cheers
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0 DanielSchmitt over 4 years ago in reply to Harald Meier

No Problem Harald,

good Luck. :)
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0 RobertRoskaric over 4 years ago in reply to Harald Meier

Great work guys. I hope this is it. Please report it back.

Best regards,

Robert
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0 DanielSchmitt over 4 years ago in reply to RobertRoskaric

No need to Hope. This is it :)
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