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Thread: smoking power supply

  1. #1
    Constant Bitrate
    Join Date
    Jun 2001
    Location
    Washington State
    Posts
    178

    Post smoking power supply

    I just fried a 250 watt atx Enlight power supply today. I did an in car test the other day which consisted of running everything from inside my car. And everything worked great. But now a couple of days has gone by and I tried to get everything running in the car again. I made no modifications, the car had just been sitting in my driveway.

    So when I try to turn the comp on nothing happens, my inverter tells me that it is having an error. So I take the comp inside and plug it into the wall. Immediately there is a small blue flash and a pop, followed by a small cloud of smoke. Now I take the thing apart and see that one of the main looking pieces, the biggest ring with lots of coils wrapped around it, is no longer yellow and red, but deep brown with what looks like burn marks on it.

    So the question is, what the hell caused this! I have another power supply, but I don't want to have this happen again, and since I know so little about power supplies I am assumming this was just a freak thing. Thanks in advance for any suggestions.

  2. #2
    Newbie
    Join Date
    Dec 2001
    Location
    Douglasville, GA
    Posts
    27

    Talking

    Hehe. Must have been one of those power supplies that are made to blow up at the beginning of the year. LOL

    Nah, just kidding on that though.. One of the capacitors probably went out on you. The power supply I am assuming wasn't new and it sounds like more of a coincidence that it failed after being in your car. What I would do is test the output of your inverter for proper voltage WHILE the car is running. The inverter could have gone to **** on you and may be dumping out more juice than it is supposed to. Whether or not that is possible or if it would cause a problem I am not sure of, but it is at least a start.

    Best rule of thumb with a carputer project, use all new stuff, dont dig around and use three year old dust collecting junk from your closet. There are too many new variables put into the equation when you start intalling a computer into a vehicle, it's best to know that it isn't the hardware that it causing the problem. Well, at least you minimize that possibility - also test your new hardware in the house on a standard power supply to make sure it works BEFORE you put it in the car.
    Two "Carputer" vechicles:
    1991 Nissan 300ZX-TwinTurbo; 500+RWHP
    1990 Mazda B2200 Pickup; >80RWHP ;-)

    http://ashleypowers.com

  3. #3
    Retired Admin Aaron Cake's Avatar
    Join Date
    Jan 2000
    Location
    London, Ontario, Canada
    Posts
    2,464

    Cool

    Also, if the power supply has capacitors at the input for power factor correction, they can overheat due to the terrible waveform from the inverter. Your coils then see a DC voltage, which is bad. Probably a good idea to get a different power supply and remove the input capacitors (search the board for instructions).
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
    Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
    "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

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