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Thread: Catastrophic Failure

  1. #1
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    Catastrophic Failure

    Well, all the voltages were right and everything was fine in the house today, so I took the power supply out to the car to test.

    Car voltage: 13.8V

    3.3V out: 13.8V
    5V out: 13.8V
    12V out: 13.8V

    ****.

    What happened? I took it back in the house and nothing works anymore. The maxim chips aren't regulating at all. Output = Input.




  2. #2
    Low Bitrate
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    Not nice
    Anyway, perhaps it could be due to a spike on the power line? Did the underside of the pcb accidentally touch a metal casing? Anything along those lines would explain it.
    Best regards,
    Matthew

  3. #3
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    Check your ground! When the maxim chips are not grounded they pump the input straight through to the output.

    <edit>

    Actually, Ill add to that. When the maxim chips are not powered on they pump the input straight through to the output. So it could be either your ground or the supply line to the maxim chips, though as its affecting all of them it it sounds more likely to be the ground.
    -------------------------------------------
    (=========-) 99% complete
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    AMD K6/2 500 @ 450mhz to keep heat and power usage down, 64Mb, slim CDrom drive, 64mb USB pendrive for MP3 transfer, 10Gb 2.5" drive for MP3, USB>RS232
    All jammed in external CDROM drive case.
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  4. #4
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    Arby,

    You altered a normal PSU using presslab's Idea right?
    why aren't you using that?

    just curious....
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  5. #5
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    Originally posted by marsjell
    Arby,

    You altered a normal PSU using presslab's Idea right?
    why aren't you using that?

    just curious....
    I got it to work with an old at supply, but I could never get it working with an ATX. It's too big, anyway

  6. #6
    Maximum Bitrate
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    Arby, I was looking for the instructions you had on you website for Presslab's PSU Mod. Marsjell has a link on his website but it goes to your old website on mp3car.com/usersites/arby and is no longer there. Do you still have a copy of that?

    Thanks!
    Falcon62
    1983 BMW 733i
    Cyrix 166 32MB with MPXPLAY And no display. Player sits on the back seat with a keypad in front. Someday I'll mount this thing for good...
    *****************************
    Gathering parts for carplayer v2.0!

  7. #7
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    Originally posted by Falcon62Travis
    Arby, I was looking for the instructions you had on you website for Presslab's PSU Mod. Marsjell has a link on his website but it goes to your old website on mp3car.com/usersites/arby and is no longer there. Do you still have a copy of that?

    Thanks!
    Falcon62
    I still have it on my hard drive. PM your email, I'll zip it up and send it to you.

  8. #8
    Maximum Bitrate
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    Just tried to PM you but your message box is full.

    My email is travis at nwtinc dot com

    Again I apreciate the help on this! I'm still not sure I have the electrical knowledge to do this but I figure I'll learn trying!
    1983 BMW 733i
    Cyrix 166 32MB with MPXPLAY And no display. Player sits on the back seat with a keypad in front. Someday I'll mount this thing for good...
    *****************************
    Gathering parts for carplayer v2.0!

  9. #9
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    arby would you be willing to send the zip to me too, so that I can include it in my website? If you don't, I understand, but it would save me a lot of work...

    marcel at noduck dot nl
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  10. #10
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