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Newbie m.magdy
Newbie
307 Views
Registered: ‎11-11-2018

ZC7O6 power problem

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ZC7O6 power problem

Board: ZC706 Rev 2.0

 

  1. At the first beginning the board wasn’t read by the Vivado Design Suite (knowing that the board wasn’t used from long time). By observing the board led indicators and by referring to (AR# 54013: Zynq-7000 SoC ZC706 Evaluation Kit - Board Debug Checklist), it was obvious there is a power problem as LEDs weren’t ON and fan wasn’t working.
  2.  After searching Xilinx website, we decided to follow (AR# 56811: Xilinx Evaluation Kits - How do I reprogram the TI power controllers on my board to the factory defaults?). we bought (USB-TO-GPIO) and referred to ZC706 Power Bus Reprogramming
  3. After Following the steps in the pdf (loading xml file then running xml). An error pops up “READ_VOUT on rail #1 (0.000 V) wasn’t with 5% of VOUT COMMAND(1.00v)” attached figure (1)

 

  1. It was decided to change UCD90120A as all power rails connected to dc-dc converters were disabled. After changing UCD9012 and powering the board normally, it was found that there is short circuit in (U42 VCCINT 1.00V @ 16A). short circuit between VOUT and GND

 

 

  1. After referring to the board schematic we found that VCCINT signal is shorted with GND signal. attached figure (2)

     

After checking the IC VCCINT pin, we found that its connected to (U1, U42, U69, U76, Q15). We were able to test (U69, U76, Q15, U42) and we found that there is no hardware problem with these ICS

 

  1. At this point the problem is the short circuit between VCCINT and GND, so we soldered original UCD as problem isn’t related to it. The UCD us disabling dc converters as there is a short circuit. We need to know if we can do further work to solve the problem, or we have to send the board to be repaired and in this case what will be the cost?

 

 

 

Figure 2.png
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1 Solution

Accepted Solutions
Moderator
Moderator
276 Views
Registered: ‎09-15-2016

Re: ZC7O6 power problem

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Hi @m.magdy

It is always recommended to reach to Xilinx in case of the Evalaution board failure at your end if your board in under warranty. As you have tried replacing the UCD90120A IC suspecting this as a root cause of the failure, i am afraid to tell you that Xilinx won't accept the RMA of board even if it is in the warranty period. You have to get it repair at your own cost, i will suggest to contact board manufacturer Whizz system for this. You can contact your distributors for repairing cost related query or Whizz system support will guide you through that:

https://www.xilinx.com/alliance/memberlocator/1-64bn80.html

Before this, i would suggest you to try below link at your end .Please go through the below link and refer to  zc706_revb_ti_xml_power_script_r9_with_alternates.zip

 https://www.xilinx.com/support/answers/53599.html

The  instructions for which you can find from the PDF link below:

https://www.xilinx.com/Attachment/ZC706_Power_Controllers_Reprogramming_Steps.pdf

Also you need a TI cable which you can order for free since you have purchased the Xilinx board. Check the link for how to purchase the TI cable for free when you purchased the board

http://www.xilinx.com/support/answers/54022.html

 

 

Regards
Rohit
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1 Reply
Moderator
Moderator
277 Views
Registered: ‎09-15-2016

Re: ZC7O6 power problem

Jump to solution

Hi @m.magdy

It is always recommended to reach to Xilinx in case of the Evalaution board failure at your end if your board in under warranty. As you have tried replacing the UCD90120A IC suspecting this as a root cause of the failure, i am afraid to tell you that Xilinx won't accept the RMA of board even if it is in the warranty period. You have to get it repair at your own cost, i will suggest to contact board manufacturer Whizz system for this. You can contact your distributors for repairing cost related query or Whizz system support will guide you through that:

https://www.xilinx.com/alliance/memberlocator/1-64bn80.html

Before this, i would suggest you to try below link at your end .Please go through the below link and refer to  zc706_revb_ti_xml_power_script_r9_with_alternates.zip

 https://www.xilinx.com/support/answers/53599.html

The  instructions for which you can find from the PDF link below:

https://www.xilinx.com/Attachment/ZC706_Power_Controllers_Reprogramming_Steps.pdf

Also you need a TI cable which you can order for free since you have purchased the Xilinx board. Check the link for how to purchase the TI cable for free when you purchased the board

http://www.xilinx.com/support/answers/54022.html

 

 

Regards
Rohit
----------------------------------------------------------------------------------------------
Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.

Give Kudos to a post which you think is helpful and reply oriented.
----------------------------------------------------------------------------------------------