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Thread: Help me troubleshoot Epia M10000/ITPS problem

  1. #1
    Variable Bitrate rgardjr's Avatar
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    Help me troubleshoot Epia M10000/ITPS problem

    Well I started having a strange problem yesterday. My setup is an Epia M10000, Morex 60W 12V DC-DC ATX Converter, ITPS, notebook hard drive, and notebook dvd drive-running windows xp. Up until yesterday the setup has been working nearly perfect in terms of the ITPS starting the computer and starting hibernation. One thing a little different about my setup is that I have a GM Sierra with the factory radio. GM vehicles have stereos that stay on until the door is openned and I have my computer setup to do the same. Normally the way it works is that I turn off truck(music stops playing), take key out of ignition(music still playing) and open door(music stops playing). What happened to me a few times yesterday was this turn off truck(music still playing), take key out of ignition-computer looses all power(music stops, Lilliput screen say no signal, when I start the truck up the next time I get a screen asking if I want to do a normal windows boot with a 20 second count down). I know that the switched lead to the ITPS is not triggering this because I use the same relay to turn my sub amp on/off ant the subs are still working. My guess is that my battery has been drawn down to a point where it barley or can't power the pc without the truck running. One other thing I should mention that I just realized-when I take the key out of the ignition(when the computer looses power)-the powered driver seat automatically moves backwards(to make it easier to get out of the truck). I'm guessing that this draw in combination with the computer and stereo could be what's causing the problem. If I don't remove the key from the ignition the pc, stereo, subs still have enough power to play. Anybody have other explanations???

  2. #2
    Constant Bitrate b_nom's Avatar
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    We'll those electrical motors that move the seat do draw quite some current, possibly bringing the voltage of the battery down below the minimum voltage that the ITPS takes (i forgot how low they can go, but I think is like 13 volts) do a for the ITPS, you'll find some posts regarding this
    '96 Chevy Cavalier - EPIA M10000, Win2K,MediaCar, Deluo GPS Mouse with Routis, 60GB external HD, 7" widescreen monitor from DigitalWW.

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  3. #3
    Variable Bitrate rgardjr's Avatar
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    Quote Originally Posted by b_nom
    We'll those electrical motors that move the seat do draw quite some current, possibly bringing the voltage of the battery down below the minimum voltage that the ITPS takes (i forgot how low they can go, but I think is like 13 volts) do a for the ITPS, you'll find some posts regarding this
    I know that there is a drop of around 1.3 volts through the ITPS. MP3Car store showed this as far as input range:

    Specs:
    Input Min. voltage 5V
    Input Max. voltage 20V

    Since I was using notebook peripherals I thought that I'd be fine as long as long as I was giving it 6.3 volts, but maybe it would need 11.3 (+5v, -5v)-I don't have a clue about the power requirements of the motherboard, but it would appear that it needs more that just +5 volts to run.

  4. #4
    Constant Bitrate STI_FFY's Avatar
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    Quote Originally Posted by rgardjr
    I know that there is a drop of around 1.3 volts through the ITPS. MP3Car store showed this as far as input range:

    Specs:
    Input Min. voltage 5V
    Input Max. voltage 20V

    Since I was using notebook peripherals I thought that I'd be fine as long as long as I was giving it 6.3 volts, but maybe it would need 11.3 (+5v, -5v)-I don't have a clue about the power requirements of the motherboard, but it would appear that it needs more that just +5 volts to run.
    I don't understand that minimum input voltage spec at all. The minimum at which ITPS will work is 13.3V, stated at the bottom of the same page as the quote you provided. What's up with that 5V minimum spec?
    SeeYa! -Jim-

  5. #5
    Variable Bitrate rgardjr's Avatar
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    Quote Originally Posted by STI_FFY
    I don't understand that minimum input voltage spec at all. The minimum at which ITPS will work is 13.3V, stated at the bottom of the same page as the quote you provided. What's up with that 5V minimum spec?
    I know that 13.3V is for a 12 volt output. I was my understanding(or misunderstanding) that since I wasn't using desktop hard drives or cd drives that I really didn't use the 12V just the +-5V and +-3.3V, but I guess that the power supply might not beable to step down to those other voltages without a 12V input. I think that my problem might be in the ITPS. I've got to verify with my tester, but I think that the ITPS is shutting the power off and not letting the computer shut down.

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