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  1. #1
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    Konica Bizhub 423 Blank Prints

    I have already changed the drum and developer from another working machine and it is the same. The machine doesn't show any errors. The service manual shows that there is a shutter for the laser unit but I can't find in the book where that is and with my flashlight I can see into the laser unit so I am not sure where that shutter is to check it. I have not changed any other parts yet. Any suggestions are appreciated and thanks in advance.

    Robin

  2. #2
    Aging Tech 10,000+ Posts
    Konica Bizhub 423 Blank Prints

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    Re: Konica Bizhub 423 Blank Prints

    Have you stopped it mid copy to see if there is an image on the drum?

  3. #3
    Senior Tech 100+ Posts TheBlueOrleans's Avatar
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    Re: Konica Bizhub 423 Blank Prints

    Other than stopping mid-job to check for image on the drum, my best guess is HVU. Board mounted flat behind dev unit, have replaced a few and that's usually the fix.
    Somewhere there is a tree working hard to produce oxygen for you to live, NOW GO APOLOGIZE TO IT!

  4. #4
    Service Manager 1,000+ Posts
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    Re: Konica Bizhub 423 Blank Prints

    Make sure dev roller is turning. You could mark a gear tooth. See if image on drum. Make sure print head is OK. You could cover cover up corona in one area and if you get black print in that area then print head is issue. If toner is on drum then check transfer roller.

    Sent from my XT1254 using Tapatalk

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