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Visitor datta1607
Visitor
10,190 Views
Registered: ‎07-14-2015

Non-working Virtex 6 ML605 board

We are using Virtex 6 ML605 board for one of the projects. The FPGA board and the Test PC communicate through ethernet. Initially, The board was working fine for a while before the ethernet communication did not happen. I am not very sure on what action led to this failure.

 

I ruled out any defects in the ethernet cable, test PC's ethernet port, DIP switch settings in the FPGA board. Now, when I turn ON the FPGA board, DS25 (12 V LED) turns ON. The FPGA init LED (DS 31) momentarily becomes red. The FPGA done (DS13)  LED turns green in few seconds. The fan is working.

 

I tried to re-program the BPI Flash to see if it resolves the problem but I was not able to. When I initialize the chain in IMPACT tool , "Cable not detect" message is displayed.

 

I was looking through some documentation available in the web. Based on them, I understood that there are power status LEDs that turn ON during power up. But most of the power status LEDs do not turn except for DS25 and DS13. I probed the power supplies in the FPGA board and the following voltage rails seem to work fine: VCC5, VCCINT , VCC2V5 , VCCAUX and VCC1V8. The following voltage rails did not produce the intended voltage : VCC1V5 and VCC3V3. I did not measure MGT_AVCC and MGT_AVTT. But the fact that DS27 and DS28 did not turn on during power up is indicative that thre is a fault in these two power rails (MGT_AVCC and MGT_AVTT)

 

Could the problem related to the onboard power regulators impact the Ethernet communication and programming the BPI Flash. Please advise on the further course of action.

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7 Replies
Scholar austin
Scholar
10,160 Views
Registered: ‎02-27-2008

Re: Non-working Virtex 6 ML605 board

d,

 

Having power supplies not working is never a good sign.  As to what is powered by what, you could examine the schematics on line.  In general, even one bad power supply would be considered a failure that precludes use of the board.

 

Is it possible damage was done by mis-handling?  Electro-static discharge is the common reason why devices fail (not just Xilinx).

 

UG116 lists the ESD tolerate (no damage) numbers.  These values are tested every year to make sure we are within specification.

 

 

Austin Lesea
Principal Engineer
Xilinx San Jose
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Visitor datta1607
Visitor
10,153 Views
Registered: ‎07-14-2015

Re: Non-working Virtex 6 ML605 board

Thank you Austin. Mis-handling of the board could be one of the probable reasons. But, I am not entirely not sure. It would be beneficial if you could advise on the future course of action. Would you recommend us to debug the board based on some checklist? I was going through other forums and there was a suggestion to reset the power controller for a similar issue. You had replied in another forum that webcase has been stopped for smaller companies. I can provide more details to you over IM if that would help to give access to webcase.

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Scholar austin
Scholar
10,140 Views
Registered: ‎02-27-2008

Re: Non-working Virtex 6 ML605 board

d,

 

There is an answer record for debugging board problems,  you may wish to follow that:

 

http://www.xilinx.com/support/answers/54355.html

 

The above is NOT for your board, but the approach should be similar for checking the power supplies.

 

Or, you may go back to your distributor, and request they help you (which may be expensive, as no one works for free).

 

 

 

 

Austin Lesea
Principal Engineer
Xilinx San Jose
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Moderator
Moderator
10,031 Views
Registered: ‎02-16-2010

Re: Non-working Virtex 6 ML605 board

AR#40398 has similar checklist but some specific details with respect to ML605 can help.
http://www.xilinx.com/support/answers/40398.html
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Visitor datta1607
Visitor
10,013 Views
Registered: ‎07-14-2015

Re: Non-working Virtex 6 ML605 board

Hi Austin, Sorry to come back. One of my colleagues had checked with the digikey distributor and they told to check with manufacturer.  This was before I got in touch with you. Probably, I or my colleague will get in touch with digikey again and communicate to them your response.

Before that, I just wanted to check one thing. The "Returns" tab in the service portal is still active for me and allows me to raise a service request. Can I raise a return request in it or still should I go through my distributor.

 

Sorry for any confusion.

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Xilinx Employee
Xilinx Employee
9,992 Views
Registered: ‎10-13-2011

Re: Non-working Virtex 6 ML605 board

Hi,

It looks this thread is about an ML605 board so you can refer to AR40398 for debugging steps

http://www.xilinx.com/support/answers/40398.html

 

Wrt return request, if the board was purchased via distribution, then the disti should open a request on Xilinx portal.

Regards,

and

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Visitor datta1607
Visitor
9,881 Views
Registered: ‎07-14-2015

Re: Non-working Virtex 6 ML605 board

Hi Afarnet I got in touch with digi-key and they are asking me to contact the manufacturer for servicing the board. Attached the transcript of the conversation.

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