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Thread: uSDC problems in my NSX (with pix and video)

  1. #21
    Banned xdjxklusivex's Avatar
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    Quote Originally Posted by strohmrs
    uSDC = Micro ShutDown Controller.
    :-P u rock lol now i know what every1 is talkin bout!

  2. #22
    FLAC
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    Quote Originally Posted by phat_bastard
    Jeff -

    Now be a good citizen and at least acknowledge my request, or I'll assume I've just been f__ked out of my $100, and leave it at that.
    Wow, thats quite the attack.

    I thought I had replied to you about that. I'm very sorry.

    I have recieved *one* back to evaluate that had the clicking problems and I wasn't able to re-produce it. The one I got had the contacts broken so I fixed that problem. I am trying to get to the bottom of the problem and if it was something in the firmware code, I was going to exchange them free of charge.

    If your really that ****ed I'll gladly take them back if you bought them through me.

    Do any of you have access to an oscilliscope? Everyone has a different inverter or power setup so it is really hard for me to re-create it. Do any of you live near the Portland OR area?

    We'll get to the bottom of this. Sorry about all the trouble guys..



    -Jeff
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  3. #23
    Constant Bitrate
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    well it looks like I am SOL because I have not recieved any sort of contact back through this store.

  4. #24
    FLAC
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    Quote Originally Posted by Sonicxtacy02
    Yea the tank circuit and 7amp battery worked
    So the battery did stop the device from acting weird? Did it solve all the problems? (other than the fact you have a honking battery now..)


    If this is the problem, that may help me come up with a cleaner solution and it points the finger at noise immunity..
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  5. #25
    Mo' Programming Mo' Problems
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    Sonicxtacy02's Avatar
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    yes the startup shut down control worked fine with the battery. I was only able to run a few tests with it so i dont know if the random soft off prob was resolved but it looked like everything was running smooth. And again i must stress that all my problems come when the engine is running. I can run in ACC forever with no problems. Noise just may be the culprit.

  6. #26
    Maximum Bitrate phat_bastard's Avatar
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    Quote Originally Posted by zootjeff
    Wow, thats quite the attack.
    Sorry I had to do that to get your attention, but I don't take being ignored well.

    Quote Originally Posted by zootjeff
    I thought I had replied to you about that. I'm very sorry.

    ....

    If your really that ****ed I'll gladly take them back if you bought them through me.
    I wouldn't say I'm that that ****ed, more like I've already invested assloads more of my time into the uSDC than I should ever have had to. I'd love to help you troubleshoot the problem, but I'd rather not have to pay for that privilege. Thanks for being a sport and offering a refund.
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  7. #27
    FLAC
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    Problem Found!

    Hi all.

    I've found the culprit to all these annoying relay clicking problems.

    When you connect a big honking inverter or DC-DC to the uSDC20D, it was creating a noise problem that was very hard to detect. This is only a problem on a small batch of units. These units were built with smaller filter caps. It is related to the temperature sensor circuit. The unit gets so much noise that it thinks it is having an over-temperature problem.

    I was able to fix the noise problem by soldering a resistor to the unit that filters the noise out. I have my 400 watt inverter plugged into my cig lighter outlet, a motherboard with a pentium 3 and 2 hard drives begin powered by it. I get the clicking with the ACC connected, with the car on or off. The clicking and and the noise goes away when I turn off the inverter. I have verfied this on a Oscilloscope.


    So everyone has a few options:
    This is only a problem if you have clicking. If you don't have clicking, your unit is probably fine.

    1. I will post a few methods of performing the mod with a 10-50 ohm resistor.
    2. I will mail you the resistor upon request.
    3. I will take back the unit, do the mod (and/or update the firmware) and send them back to you free of charge.



    I'm sorry to all of you who's time I've wasted by this. Thanks to everyone who hung in there with me. It now makes sense why I missed it and why many of the shutdown controllers are working for the majority of people.

    -Jeff
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  8. #28
    FLAC
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    uSDC20D Mod

    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  9. #29
    Constant Bitrate strohmrs's Avatar
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    Jeff,
    I'll give the resistor a try later today. Is that a 33 ohm in the picture? Hard to tell what color that is. I have an o-scope if that will help in choosing which value will work best for my setup. Just need to know where are you seeing the noise at on the board. I'll report back with my results and thanks for not leaving us hanging! You had us starting to worry!
    Rick S.

    XP Pro SP2, Soyo P4RC350 MB, Nvidia FX5200, 320W PS, Inverter & uSDC20D, 2.4GHz CeleronD320, 512MB DDR, 30GB 3.5", Pioneer 106s Slot DVD, Linksys WMP54G WiFi, Lilliput 7" & 4" TFT LCD, Zippy EL610 Keyboard, Touchpad, Garmin GPS V

  10. #30
    FLAC
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    Quote Originally Posted by strohmrs
    Jeff,
    I'll give the resistor a try later today. Is that a 33 ohm in the picture? Hard to tell what color that is. I have an o-scope if that will help in choosing which value will work best for my setup. Just need to know where are you seeing the noise at on the board. I'll report back with my results and thanks for not leaving us hanging! You had us starting to worry!
    Pin 5 of the 20-pin microcontroller IC is VCC, the noise is coming in to the 8-pin regulator on the input (pin 1) and going out (pin 8) you can see on pin 8 a little triangle wave if you don't have the resistor. The resistor basically makes a little RC filter with the C that is already there right above the regulator.

    Yes that is a 33ohm resistor. I used a 10 ohm and a 33 ohm and both worked.
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

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