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  1. #1
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    Konica Bizhub C-353

    Hello tech's, The c-353 I'm working on is back grounding on the first page and first 4 inches of the leading edge only ( sample attached), after that it runs fine for that job. What it looks like to me is loosing developer bias. I pulled out the transfer unit and all the I/U"s and cleaned cavity well and pulled the cleaning unit from the transfer assembly and vacuumed the cleaning section for stray developer. I also replaced the black I/U, same problem. When the CQ problem happens the image under the background looks ok. any suggestions would be greatly appreciated. Thanks
    sample 5.pdf

  2. #2
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    Re: Konica Bizhub C-353

    and it is also pulling developer! grainy affected area!

  3. #3
    Field Supervisor 500+ Posts B0265's Avatar
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    Re: Konica Bizhub C-353

    Try changing the printer control board.

  4. #4
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    Re: Konica Bizhub C-353

    Quote Originally Posted by B0265 View Post
    Try changing the printer control board.
    Why the print contol board?

  5. #5
    SanDiegoCopierRepair.com 1,000+ Posts
    Konica Bizhub C-353

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    Re: Konica Bizhub C-353

    Quote Originally Posted by acsolutions View Post
    Why the print contol board?
    Reset the machine by cycling main power & do a gradiation adjust. Then Start with cleaning the laser.......if it's still the same after cleaning it.......replace the mfp board(sdram issue on mfp board-- on Mossel & Thames series). Apparently a problem with ICP5 can also cause issues like this.Konica ICP List.pdf
    Last edited by blazebusiness; 06-11-2013 at 03:18 PM.
    Anything can be made to work if you fiddle with it long enough- San Diego Copier Repair.com

  6. #6
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    Re: Konica Bizhub C-353

    Quote Originally Posted by blazebusiness View Post
    Reset the machine by cycling main power & do a gradiation adjust. Then Start with cleaning the laser.......if it's still the same after cleaning it.......replace the mfp board(sdram issue on mfp board-- on Mossel & Thames series). Apparently a problem with ICP5 can also cause issues like this.Konica ICP List.pdf
    Yes, I cleaned the laser slit glasses and performed gradiation adjustments. I will take a look at the main board(MFP) Thanks
    Last edited by acsolutions; 06-11-2013 at 03:49 PM.

  7. #7
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    Re: Konica Bizhub C-353

    Quote Originally Posted by blazebusiness View Post
    Reset the machine by cycling main power & do a gradiation adjust. Then Start with cleaning the laser.......if it's still the same after cleaning it.......replace the mfp board(sdram issue on mfp board-- on Mossel & Thames series). Apparently a problem with ICP5 can also cause issues like this.Konica ICP List.pdf
    Looks like that ICP 5 on the print controller is bad just like the diagram you sent read!

  8. #8
    Field Supervisor 500+ Posts B0265's Avatar
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    Re: Konica Bizhub C-353

    Quote Originally Posted by acsolutions View Post
    Why the print contol board?
    We had this on a C253.

  9. #9
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    Re: Konica Bizhub C-353

    Blaze, wins a home entertainment center!!! Yeah, the icp5 was open and I replace the print controller. all is well!! Thanks guys

  10. #10
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    Re: Konica Bizhub C-353

    Quote Originally Posted by acsolutions View Post
    Looks like that ICP 5 on the print controller is bad just like the diagram you sent read!
    Thanks for that ICP list, very helpful!

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