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  1. #1
    service manager
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    C654 with white spots on 2nd side

    Can any one help with a this problem. I have installes a brand new C654e machine and from the first duplex copy i made the machine makes white spots on the second side. i have lowered the 2nd image transfer voltage with no luck at all

  2. #2
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: C654 with white spots on 2nd side

    the customer is using low quality paper, this must be addressed.

    every single 4 series will do this if poor quality paper is used.

  3. #3
    service manager
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    Re: C654 with white spots on 2nd side

    Hi, the customer is using 80g normal paper. we tested that paper on a C652 that is standing next to the C654 machine, working ok. even on 120g,160g gloss and bond paper the machine is making the white spots

  4. #4
    Technician
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    Re: C654 with white spots on 2nd side

    There is a KM bulletin for this issue on the C654

    Search KM website for "starry effect (white dots) on reverse side "

    Cause
    Auto mode for 2nd transfer isn't very good
    Changing off auto has shown some good results for me

    There is also SW setting changes in Bulletin
    but I havnt needed to use them yet

    Sorry I don't have the Bulletin number

  5. #5
    Service Manager 5,000+ Posts
    C654 with white spots on 2nd side


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    Lightbulb Re: C654 with white spots on 2nd side

    This Parts & Service manual can now be purchased for $12.77 and downloaded immediately after payment from:


    Just Manuals, The Internet's largest selection of manuals ~ Instant Downloads


    Paul@justmanuals.com

  6. #6
    Junior Member
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    Re: C654 with white spots on 2nd side

    I have this problem with C754e
    In one-side every thing is OK, but when I print two-side, the first side (which is printed last) is with little dots.
    I have tested on PaperOne and DoubleA papers, the same results

  7. #7
    Service Manager 2,500+ Posts
    C654 with white spots on 2nd side


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    Re: C654 with white spots on 2nd side

    Problem Solution
    ID: KBA00029701
    Related Products:bizhub C754e,bizhub C654,bizhub C654e,bizhub C754
    Related Options:


    Problem
    White spots (Starry night) on second side.

    Solution
    CAUSE: Firmware requires updating.

    SOLUTION: Install firmware version K5 or newer and perform the following.

    1. Service mode =>System 2 => software switch change dip switch 59 to hex 01.
    2. Administrator mode => Security Settings =>Security Details. Change the following Engine Dip switches.

    • Engine DipSw 25 to Enable
    • Engine DipSW 26 to Enable

    3. Make the following adjustments in Service Mode =>Image => Process Adjustment

    • Transfer adjust => 2nd side transfer -5

    4. Service mode => Machine => Fusing Temperature

    • Adjust Fuser Temperature to -10



  8. #8
    Senior Tech 100+ Posts Brett GS's Avatar
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    Re: C654 with white spots on 2nd side

    Hi all
    I have got the same issue.
    Machine worked fine until a brand new transfer belt was replaced,tried another new belt but no luck.
    I have followed and applied all the above mentioned settings,the paper quality is decent.
    Have the material quality that KM are using on the belts
    nowdays gone down/cheap?.

    Thanks
    Brett

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