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Thread: itps problem

  1. #1
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    itps problem

    so i have an itips, just for switching on/off the mobo, my 250w pwsp. gets 12 v unswitched, together with the itps, both on the same gnd, the itps gets acc alone. but my problem is that itps doesent turn on the mobo, i can turn it on my self.
    if i messure the voltage over itps the unswitched volts is 12,4 and acc 14,4,
    but nothing happens, if i take the itps inside, and try with 13-14 volts by a power regulator, it can power up my office pc?

    strange, im a bit ****ed, please help :-)

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    So you're using the ITPS only for signaling the mobo to turn on, right?

    The way you described it, the ITPS is getting ONLY switched ACC? Or you have BOTH 12v PLUS switched ACC going to the ITPS?
    Quote Originally Posted by ghettocruzer View Post
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    you need both a constant power line and acc going to the itps (as bugbyte mentioned) ...

    also hook up a continuity testor to the ACPI pins on the ITPS ... then start the car ... if all is working well you should hear a short beep a few seconds after turning on the car. THen turn it off ... again, you should get another short beep.

    Do that just to verify the ITPS is acting as it should. then go from there.
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    itps

    i have both acc and unswitched power to the itps, and its only functions is as a startup/shutdown ctrl...


    it can power up a mobo, i did that inside.... i have rund the wiring to itps from the headunit

    and the wires to the powersupply from the battery...!

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    Try reversing the lead to the mobo on your car pc. This happened to me and reversing the connection coming from the ITPS to the mobo header worked.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
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  6. #6
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    and I'm assuming when the car's running you are getting voltage out on the ITPS? (I realize it doesn't go anywhere, but it tells you the unit is on)

    I'd still check continuity on the ACPI pins. I've had one ITPS refuse to turn on a mobo (bad PIC)
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  7. #7
    FLAC shakes's Avatar
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    Quote Originally Posted by Bugbyte
    Try reversing the lead to the mobo on your car pc. This happened to me and reversing the connection coming from the ITPS to the mobo header worked.
    Are some mobo's sensative to that?

    very interesting.
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    i have try reversing the pins, and i can power up my home pc , if ill try it inside, so im thinking is there another way i can power the system bu the itps, but ill think i have done everything right

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    Quote Originally Posted by shakes
    Are some mobo's sensative to that?

    very interesting.
    Mine was with my Carnetix. Worked one way, not the other. Go figure.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
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  10. #10
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    hmmm the strange thing is, that it works inside, with a power regulator

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