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  1. #1
    Technician drbing's Avatar
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    C5300s pro darkness

    Hi,first of all I would like to thank everyone who helped me last time. Now it is a new device that has worked for about 300 k, it started to leave a dark background, in the place where the paper should be clean. The following was replaced, ITB cleaning unit,PTR,PCU cleaning unit and same happend.Only left is PCU drums.Any help?

    Sent from my SM-A707F using Tapatalk

  2. #2
    Service Manager 1,000+ Posts
    C5300s pro darkness

    GIUBOSS's Avatar
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    Re: C5300s pro darkness

    It would be better to see a photo of the problem

  3. #3
    Technician drbing's Avatar
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    Re: C5300s pro darkness

    I don't know how well you can see, but the part of the paper that is not printed on the left should be white like the paper on the right.20230918_101101.jpg

    Sent from my SM-A707F using Tapatalk

  4. #4
    Service Manager 1,000+ Posts
    C5300s pro darkness

    GIUBOSS's Avatar
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    Re: C5300s pro darkness

    It is not clear in the photo but if the background is gray (tending to black), check the maintenance counter of the black PCDU and if necessary clean it or replace it entirely, or if you can even individual pieces (drum, devel., blades, bar wax, winding roller). Are you a technician?

  5. #5
    Technician drbing's Avatar
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    Re: C5300s pro darkness

    Yes, as I said, everything was replaced, all four PCU cleaning units.

    Sent from my SM-A707F using Tapatalk

  6. #6
    Service Manager 1,000+ Posts
    C5300s pro darkness

    GIUBOSS's Avatar
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    Re: C5300s pro darkness

    I wrote complete pcdu unit

  7. #7
    Technician drbing's Avatar
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    Re: C5300s pro darkness

    I did not change only the developer. In any case, the machine printed only 300 k. The replacement of drums and developer is about 1 mil.

    Sent from my SM-A707F using Tapatalk

  8. #8
    Field Supervisor 500+ Posts
    C5300s pro darkness

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    Re: C5300s pro darkness

    just because the drum or developer is rated for a certain life count doesn't mean you will get that count...

  9. #9
    Technician drbing's Avatar
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    Re: C5300s pro darkness

    I know that 5% coverage is calculated, but I just replaced the drums as well. We'll try.

    Sent from my SM-A707F using Tapatalk

  10. #10
    Field Supervisor 500+ Posts
    C5300s pro darkness

    dalewb74's Avatar
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    Re: C5300s pro darkness

    have you cleaned the ID/Music sensors? what about the lenses for the PCDU?

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