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  1. #1
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    bizhub pro 1050 ,toner background,sc29-11

    I have a problem, the toner in the bottle is over, after adding a new one, the whole sheets are covered with a gray background, give too much toner. There is sc29-11 error, with the settings of auto drum potential pops up error 3. I have replaced the drum for another,i changed the image density to lighest, but it is still the same. Is it a fault of a used developer or a potential sensor broken?

  2. #2
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: bizhub pro 1050 ,toner background,sc29-11

    So before the toner change the machine was ok and then after the prints was wacky?
    Did you use KM original toner?

    Tweaking is not going to do much good with an error on the machine.

    Could be that the drum charge is leaking or you have a bad charge unit.
    But there is SC29-09 and SC2910 you are not getting. So no under or over voltage detected. So more likely the sensor.
    Then again bad end blocks and cracked drum cradles on the PRO920 produced this code.

    Did you feed it a TN014/015 toner?
    Whatever

  3. #3
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    Re: bizhub pro 1050 ,toner background,sc29-11

    Original TN010 .After inserting a new bottle it started to make such a background.I change the dipsw laser pwm to lighter,and something else,and for 200 pages it printed perfectly.Then is started to make the background again.

    https://zapodaj.net/2e794f5b7a740.jpg.html
    Last edited by itan84; 04-29-2019 at 09:15 PM.

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    Senior Tech 100+ Posts tulintron's Avatar
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    Re: bizhub pro 1050 ,toner background,sc29-11

    Quote Originally Posted by itan84 View Post
    Original TN010 .After inserting a new bottle it started to make such a background.I change the dipsw laser pwm to lighter,and something else,and for 200 pages it printed perfectly.Then is started to make the background again.

    https://zapodaj.net/2e794f5b7a740.jpg.html
    Clean imaging unit, sensors, check charage corona, perform drum shift adjustment.


    Based on the conditions below set dipsw to the following:
    4 ~ 8% average .25% increase in toner to carrier ratio
    DIPSW 23 2 Toner density of developer selection 0
    23-3 0
    23-4 1
    DIPSW 27 2 Image density selection (toner control patch density) 0
    27-3 0
    5 Thin characters reproduction improvement (usage of smaller laser dot)
    Standard Thin-character Correspondent 0

  5. #5
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: bizhub pro 1050 ,toner background,sc29-11

    You first need to figure out the error sc29-11.


    Again tweaking is not a solution so i would leave all settings and dip switches as is and focus on the problem.

    What is the life count on the drum and developer?

    If you have a drum potential sensor to spare i would check that first as per the manual.
    Looks like the machine is having a difficult time controlling the charge voltage.
    Changing the entire drum cradle is another option.
    If not that then very carefully check for a wiring/short issue then as per manual the control board.
    Whatever

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    Re: bizhub pro 1050 ,toner background,sc29-11


    When I change ditches 23.234 and 27.23 it's even worse, I do not move.
    This error occurs sporadically, but from the very beginning. The machine already has 11 million copies, last week it joined and printed perfectly, white card and black text, the next day no longer. When switching on, the message is undergoing correction, it should set itself , maybe in the service mode, some procedures I do not know.


  7. #7
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: bizhub pro 1050 ,toner background,sc29-11

    Have you changed out the drum potential sensor?
    Whatever

  8. #8
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    Re: bizhub pro 1050 ,toner background,sc29-11



    I do not have a spare, and now it's hard to get one. How miraculously did it fit, I do not know what is causing. The drum and developer has more than a million, but the print quality does not indicate wear. Different miracles have worked with this printer but not yet.



  9. #9
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: bizhub pro 1050 ,toner background,sc29-11

    Should still be able to get the DPSB they are expensive but worth a wack.

    So just before the machine errors out it starts running a background?
    Whatever

  10. #10
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    Re: bizhub pro 1050 ,toner background,sc29-11

    If there is a mistake or not, there is a background from the toner. The printer turns on without error and does the background, except that one time it turned on correctly.


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