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Newbie jal123
Newbie
9,174 Views
Registered: ‎04-26-2016

ZC706 AR#60702 Vadj

I am working on a project where we have 14 ZC706 development boards.   On several of our boards we experience issues wherein after a power cycle the Vadj supply fails to start.    The probability of this happening seems to increase with increasing temperature of the board.      Using either of the reset pushbuttons does not recover the Vad.    The only solution seems to be to power the board off,  wait 5min or so, and power back on.     AR #60702 alludes to "Power related issues might be experienced on 1% of ZC706 and AC701 Evaluation Kits."  but does not elaborate on what symptoms one might expect.    

 

Can anyone provide a more detailed description of the symptoms and underlying problem to which AR #60702 refers.

 

Thanks,

Jim

 

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5 Replies
Moderator
Moderator
9,149 Views
Registered: ‎07-23-2015

Re: ZC706 AR#60702 Vadj

@jal123 

 

  1. What is the Board Rev of the ZC706 boards? Please refer to this AR http://www.xilinx.com/support/answers/62325.html for checking Rev of the board. 
  2. Are all the 14 boards of the same Rev? 
  3. When did you purchase these boards and from whom?
  4. These issues came up from the time you using the new boards or only after using them for a while and this issue cropped up.

 

 

- Giri
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Newbie jal123
Newbie
9,131 Views
Registered: ‎04-26-2016

Re: ZC706 AR#60702 Vadj

Hi gnarahar,

 

Thanks for your response.

 

Our boards were purchased directly from Xilinx.

 

They show the issue from receipt of the board but some of our developers don't care and keep using the board anyway but always leave the power on.    In other situations there is a need to cycle power and not having Vadj come back up w/o 5min wait is an issue.

 

I will go around and check the revisions.    Since we have a lot of boards it will take some time.

 

Meantime,  can you answer the part of my question about the symptoms of the problem to which AR60702 refers.

 

Thanks

Jim

 

 

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Moderator
Moderator
9,122 Views
Registered: ‎07-23-2015

Re: ZC706 AR#60702 Vadj

@jal123 AR#60702 symptoms can be anything like power LEDs not lit, power rails not coming up correctly, JTAG access issues related to power as mentioned in AR which were narrowed down to Power modules. 

 

Since you purchased from directly from Xilinx and you say the issue existed right from day 1 for many of the boards, you may be better off filing a Technical Support Request to get more help and see if you qualify for RMA. 

 

I would suggest you follow the 3 steps mentioned in AR#60702 if you suspect the issue with power modules ( seems to be the case as you mention VADJ rail )

- Giri
--------------------------------------------------------------------------------------------------------------------
There's no such thing as a stupid question. Feel free to ask but do a quick search to make sure it ain't already answered.
Keep conversing, give Kudos and Accept Solution when you get one.
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Newbie jal123
Newbie
8,991 Views
Registered: ‎04-26-2016

Re: ZC706 AR#60702 Vadj

So far I've been able to verify the version on 5 of our boards.    One is 1.2 and the other 4 ar 2.0.

 

Will post the other versions next week.

Jim

 

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Moderator
Moderator
8,787 Views
Registered: ‎07-23-2015

Re: ZC706 AR#60702 Vadj

@jal123 Thanks Jim. 

 

As mentioned earlier, if you feel the boards started having issues, it may be worthwhile to file a Technical Support request so that the concerned team can help you out and get the boards up and running. If not, they can help you get an RMA if qualified. 

- Giri
--------------------------------------------------------------------------------------------------------------------
There's no such thing as a stupid question. Feel free to ask but do a quick search to make sure it ain't already answered.
Keep conversing, give Kudos and Accept Solution when you get one.
-----------------------------------------------------------------------------------------------------------------------
0 Kudos