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  1. #1
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    C452 power issue

    power turns off instantly when front door is closed, as if someones turned off the main switch.

    will do the same thing if the side door is left open or closed.

    new dcpu, new prcb, new mfp board no difference.

    removed fusing unit, disconnected ihpu totally, no difference.
    no accessories connected, no adf connected, even disconnected the scanner. no difference, same symptom.

    machine will start up ok with front door open and no errors logged, as soon as the front door is closed at any stage, instantly off, no 5v no 24v no nothing.

    turning off main sw and restarting it gets it going again. something is dead shorting somewhere..

    machine is 1 month old.


  2. #2
    PHD in Sh!t Disturbing 250+ Posts Shadow's Avatar
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    Re: C452 power issue

    was this machine like this when it was installed?
    sounds like you have a short some where in the wiring.
    have you been in contact with tech support?
    what is the replacement warranty?
    have you checked all the connectors to the switches in the doors?
    sounds like a candidate for manufacturer replacement.

    $hit Happens - Deal with it and move on.........................................................................Lock & Load

  3. #3
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: C452 power issue

    machine was perfect up until last weekend.

    come Monday when people come back to work, dead. I wouldn't be surprised if a little bit of lightning may of been involved.

    all switches and their connectors checked out ok with a multimeter, no shorts.

    we are the manufacturer, a loan machine is going in and we're going to try to get to the bottom of this one, ill imagine if we cant it'll get written off.

    one thing i noticed was the AC voltage out of the wall was a little high @ 250V (240V region) once the machine gets back to our workshop, if it works, that's probably a possibility.


  4. #4
    Master Of The Obvious 5,000+ Posts


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    Re: C452 power issue

    There are certainly plenty of other power related problems, but variations of less than 10% VAC usually aren't a problem. 4.16% is relatively clean. It wouldn't hurt to see what the power quality analyzer records.

    I think the way that I would approach this, is to remove the back cover. With the front door open and power "up" I'd check all the DC Power Supply outputs. Then I'd close the door and make the same checks. What changes? Which pins lose voltage, and by how much? Are there any error codes stored?

    The manual won't be much help to you. You can read output values right off the DCPS.

    I've spent quite a bit of time on a similar issue. The main thing that I learned is that the PRCB enables each of the DC voltages on the DCPS. I started by replacing the DCPS and got the exact same outputs. When I replaced the PRCB the voltages came back at the DCPS, but the particular motor still didn't run.

    Let us know what you discover. =^..^=

    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.


    blackcat: Master Of The Obvious =^..^=

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