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Thread: DSATX Power Supply on LV-673 MoBo

  1. #1
    Maximum Bitrate Caelric's Avatar
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    DSATX Power Supply on LV-673 MoBo

    I have an LV-673 motherboard, which does not have a standard ATX power supply input, but rather has a 4 pin 12V input, wihch matches the J8 connector on the DSATX supply.

    If I plug this in, and the 20-pin connector (J7) on the DSATX is not plugged into anything, will the DSATX put the full output to that 12v rail instead of the one on the J7 connector?

    Second, how will the shutdown controller signal the mobo to shutdown? Will a pulse on the 12v rail signal it to shutdown?

    Finally, if I connect a power button from a standard case, where would I plug it into? The mobo, or the DSATX? If so, where on it?

    LV-673's specs can be found here: http://www.commell.com.tw/Product/SBC/LV-673.HTM

    DSATX power supply specs can be found here: http://mpegbox.net/dsatx.html

    Thanks for any help.
    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
    Core Duo CarPC
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  2. #2
    Maximum Bitrate Caelric's Avatar
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    ok, I just realized you just throw a 2 wire jumper from the DSATX to the power button jumper on the mobo. Duh.

    On the other hand, I am powering the powersupply with an ATX powersupply on the 12V rail, and the DSATX is getting 12V from the ATX 12V rail, but it is not seeming to put out 12V on any of it's lines, except the red led is light up steady, which means it should be working (according to the docs for the DSATX)

    Any ideas?
    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
    Core Duo CarPC
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  3. #3
    FLAC
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    Quote Originally Posted by Caelric
    ok, I just realized you just throw a 2 wire jumper from the DSATX to the power button jumper on the mobo. Duh.

    On the other hand, I am powering the powersupply with an ATX powersupply on the 12V rail, and the DSATX is getting 12V from the ATX 12V rail, but it is not seeming to put out 12V on any of it's lines, except the red led is light up steady, which means it should be working (according to the docs for the DSATX)

    Any ideas?
    Dave
    You need to simulate the motherboard turning on the power supply by shorting the green wire on the 20 pin cable to a black pin. Then it will turn on the supply.
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  4. #4
    Maximum Bitrate Caelric's Avatar
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    Yep, got that wired already, which is why the ATX power supply is actually powering up the DSATX. But the DSATX is not putting out power to the actual motherboard...

    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
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  5. #5
    FLAC
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    Quote Originally Posted by Caelric
    Yep, got that wired already, which is why the ATX power supply is actually powering up the DSATX. But the DSATX is not putting out power to the actual motherboard...

    Dave
    You did the green wire thing on both the DSATX and the power supply powering it?
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  6. #6
    Maximum Bitrate Caelric's Avatar
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    No, just on the ATX powering it; the DSATX is only hooked to the mobo via the 4 pin 12V cable, because thats all the power input the mobo has. It does not have a 20 pin atx connector on the mobo.

    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
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  7. #7
    Maximum Bitrate Caelric's Avatar
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    Hmm, tried shorting those pins; apparently it needs those pins shorted to put out power, even though that connector is not connected to the mobo. Wonder if there is any other way to do this.

    Second problem: I can turn on the computer by connecting a power button to it, but I can't get the DSATX to output a turn on signal even if it is connected the same exact way the power button is connected.....any ideas?

    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
    Core Duo CarPC
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  8. #8
    FLAC
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    Quote Originally Posted by Caelric
    Hmm, tried shorting those pins; apparently it needs those pins shorted to put out power, even though that connector is not connected to the mobo. Wonder if there is any other way to do this.

    Second problem: I can turn on the computer by connecting a power button to it, but I can't get the DSATX to output a turn on signal even if it is connected the same exact way the power button is connected.....any ideas?

    Dave
    Have you tried the polarity?

    What are the power pins called in the manual? Are they PWR and GRND or PWR and 5VSB?
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  9. #9
    Maximum Bitrate Caelric's Avatar
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    PWR and 5VSB

    Tried switching the polarity as well, on both the DSATX and the mobo (obviously, it's the same thing, but tried, just in case)

    Like I said, I can hook up a powerbutton, and turn it on/off from there, but not with the cable from the DSATX.

    And yes, my wife is upset that I am working on my carPC rather than celebrating New Year's...

    Dave
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  10. #10
    Maximum Bitrate Caelric's Avatar
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    Ok, I think I see what the problem is. I have the PS_On sense pin in the 20 pin connector shorted to ground on the DSATX itself, so the DSATX thinks that the computer is on, even when it is not. So, this might make it not send the on pulse?

    If so, what should I short it to other than ground? Ground on the mobo?

    Or something else?

    Or am I totally off base?

    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
    Core Duo CarPC
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