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DRIVECABLE04EVK: Pair not connecting

Alex Konysky
Prodigy 30 points
Part Number: DRIVECABLE04EVK

The TX card fails to register as existant when plugged in, the RX card does work when plugged in. Tested with a second pair and the setup does work correctly and is isolated to this singular card.

  • 0
    TI__Guru* 93670 points

    Hi Alex,

    I apologize for long delay to respond to this post.

    You said TX card fails to register as existant, i suppose you are saying the transmitter device attached to DrivecableTx does not see the 100 ohm termination? Is my understanding correct ?

    If my understanding is correct, please make sure R5, C2, and C3 are installed. These three passive part provide 100 ohm termination. Do you have R37 and R38 installed?

    Regards,,nasser

  • 0 in reply to Nasser Mohammadi
    Prodigy 30 points

    Hello Nasser

    Yes that is correct.

    I checked R5, C2 & C3 and the pads look to be filled. I have a hard time seeing if there is anything installed in R37 & R38. As far as I can tell the pads are filled.

    Regards

    Alex

  • 0 in reply to Alex Konysky
    TI__Guru* 93670 points

    Hi Alex,

    Do you have a voltmeter? You can put your voltmeter across R5 and you should get 100 ohm. 

    If you don't have a voltmeter please send us a close-up picture of this area of the board and we can check.

    Please let us know.

    Regards,,nasser

  • 0 in reply to Nasser Mohammadi
    Prodigy 30 points

    Hello Nasser

    I sent back the boards to the vendor under RMA. They decided that since the boards were DOA and I had already replaced them that this was the better solution.

    Thank You for your help!

    Regards

    Alex