• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 99 subscribers
  • Views 174 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SK-AM64: Out of box failure - Case CS0685812 (SO# T01497361)

Mark Edwards1
Prodigy 80 points

Part Number: SK-AM64

Bought two SK-AM64 kits for a new project. 

Powered up the USB C, then the Micro USB for console. U55 got red hot (burnt the paint off my desk!). SK-AM64 kit DOA.

(repeated with the second SK-AM64 I bought and everything is working fine).

I need get a replacement SK send out - please can you help.

  • 0
    TI__Genius 13505 points

    Hi Mark,

    Did you already file a claim with the customer service center (based on the info in the subject above)?

    Thanks for the heads-up.  We've not heard of any failures like this before. All boards are 100% tested, so something must have happened during shipment.  Did you notice any damage to the box?  Any chance you could post a photo of the PCB in the area of U55?

    Also, could you let me know what type of power supply was used?

    Regards,
    Mike

  • 0 in reply to Michael Erdahl
    Prodigy 80 points

    Yes – started with customer support (who opened this case). They said E2E need to bless the replacement (hence this thread).

    Board and packaging was perfect. Literally unpacked, setup the boot/SD image. Power up USB C then USB micro. Green lights came on by C and Micro before it started to smell. Nothing to see on the board. I pulled the plug when the desk started smoking (will not be applying power to that board again). USB C power came from Laptop docking station, Micro USB was direct connect to Laptop USB.

    Everything the same when I powered up the other board I bought but that didn’t get hot and is working fine.

     Hope that helps – what I need is to get this board replaced so I can get back on working.  

  • 0 in reply to Mark Edwards1
    TI__Genius 13505 points

    Hi Mark,

    If the customer support center is asking for us to approve the replacement, then yes, you have our approval.

    At the moment we are out of stock and will be receiving more boards some time this week (in transit).

    I'll mark this as resolved, but if I misunderstood what you need, just let me know and we will get this taken care of for you.

    Regards,
    Mike

  • 0
    Prodigy 171 points

    This happens if your power supply is not USB PD (Power Delivery) capable. You need: 

    - a power adapter that is PD certified - the adapter should end with USB Type-C connector - and not USB -A-one

    - USB Type-C to USB type-c cable of good quality (USB-A to USB-C will not work)

    The SK board contains PD chip that will not power on the kit until it succeeds to talk to the PD adapter - it needs to be sure that the adapter is capable of supplying 5V/3A, and this is known by the state of CC1 and CC2 pins. Those pins are routed only when using the full "type C" design. If there is any kind of "adapter" to USB-A in the chain, the CC pins are not connected anymore and it will fail.

    The RED LED "fail" indication points exactly to this reason - the SK board PD controller was not able to negotiate 5V/3A support from the power source (adapter). 

    Just find a proper "usb power delivery adapter" and check it claims to support "5V/3A" rate (usually, written in the specification or at the adapter itself). I am using 20W PD type with success, but there are 18W adapters that should work. Also, find the "type-c to type-c" cable.