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  1. #1
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    MZ1090 power supply issue

    Hello all,
    I have a Riso MZ1090 that shut down in the middle of a print run. When I try to power up the machine I can hear a clicking sound and the wake up button flashes on and off. I have removed the front panels and checked all of the connections that may have been knocked loose. The fuses I was able to locate are fine. It seems like power is unable to reach some key area but I'm at a loss for where that might be. The power cable is in the proper position and I have powered up another machine using the same outlet no problem. Any help would be greatly appreciated. Thank you!

  2. #2
    Riso dude 250+ Posts jermyth's Avatar
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    Re: MZ1090 power supply issue

    Sounds like a component or two on the power supply board is blown. Been there. I'm thinking your going to have to find a new board. I have not heard of anyone repairing RISO boards in a long time. Good luck.

  3. #3
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    Re: MZ1090 power supply issue

    jermyth any idea where I might find a new board?


  4. #4
    Riso dude 250+ Posts jermyth's Avatar
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    Re: MZ1090 power supply issue

    If you can find a RISO dealer in your area, but they will be expensive. Estimate from a dealer, $1000. BTW part number 047-50505 power supply PS22-HWW.
    Try posting in the parts forum or the wanted forum or both. Try Ebay??

    Goog luck.

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