IR5880 Soiling in the Form of a Ring

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  • ariser
    Junior Member
    • Sep 2010
    • 7

    #1

    [CQ] IR5880 Soiling in the Form of a Ring

    Hi,

    In service manual (chapter 15, page 815) there is description about soiling in the form of a ring on prints.
    On image sample there is magenta dot, but my machine also have problem with cyan and yellow.




    I change switches that are mentioned to decrease developing bias but it didn't help.
    Dots appear on every 5~8 pages. For example it could be 3 magenta dots, or 1 yellow or 4 cyan (
    the number always changes).





    Machine have new starters C, M, Y, also new magenta developing assembly and new primary corona.

    Could it be problem with developing rotary? I have no idea what to do next

    Thanks for any help.
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