HELP! Olivetti MF25 gone C-2552 after fuser unit replaced

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  • foobar
    • Jun 2025

    #1

    HELP! Olivetti MF25 gone C-2552 after fuser unit replaced

    Hello all, new here and first post so be gentle

    I have an olivetti d-color MF25 which, if the interweb is correct is very much the same as a konica C252?

    Anyway for about 2 months its been moaning about needing the fuser replaced, which i ordered. I put off fitting it for as long as possible. Today my boss told me he needs to print an important letter and to sort the copier out because every time he prints in colour, he gets blue lines across the page (even if hes not printing blue!?, B&W prints are fine though).


    So... in the interests of being able to afford a pint at the weekend I promptly acted upon my bosses instructions.

    I started by replacing the fuser. I then removed all the imaging units (using a black bag so as to avoid light exposure), took them into a darkened room and blew off any excess toner I also gently dusted off any toner I could see.

    I put everything back together and I wish I hadn't touched it now. The blue lines are still coming out on prints but worse, the toner does not seem to be properly fixed to areas of the page and after a number of prints the copier goes into "Call rep" mode reporting an error code of C-2552.

    Now, if this printer is a rebranded C252 then that error code means that its detected excess cyan toner but I cant see why or where that toner is? I did read something about checking the T/C ratio in the service menu but I have no idea how to get into service mode. I tried the counter utility stop, 00, stop 01 methods but no joy.

    Does anyone have any suggestions? I really would like to be able to afford that pint at the end of the week
  • foobar

    #2
    Re: HELP! Olivetti MF25 gone C-2552 after fuser unit replaced

    Ok well fat fingers may have been the cause of not being able to get into service mode. Im there now and state confirmation -> level 1 history and the figure for cyan is 16.8% where the others are all around 7% so it looks like one of the problems certainly seems to be with the cyan toner.

    So I guess there is a sensor in the imaging until that is giving back this figure (excuse my ignorance, I am a software developer not a photocopier engineer) I wonder if I should open the toner slide on the IU and empty some toner out?
    Last edited by Guest; 01-17-2012, 05:46 PM.

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    • dickierock
      Trusted Tech

      Site Contributor
      250+ Posts
      • Jan 2010
      • 252

      #3
      Re: HELP! Olivetti MF25 gone C-2552 after fuser unit replaced

      Hi,the fuser is not usually a user replaceable part.It may not be installed correctly.The blue line are generally pointing to a faulty cyan image unit.Tell the boss I said the machine is long overdue a service and let the engineer sort it for you while you kick back quenching your thirst...

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      • foobar

        #4
        Re: HELP! Olivetti MF25 gone C-2552 after fuser unit replaced

        Originally posted by dickierock
        Hi,the fuser is not usually a user replaceable part.It may not be installed correctly.The blue line are generally pointing to a faulty cyan image unit.Tell the boss I said the machine is long overdue a service and let the engineer sort it for you while you kick back quenching your thirst...
        Thanks for the reply dickierock

        I don't understand why its not user replaceable, It's literally two screws and three connectors to click together, not sure how I could have got that wrong.

        I've had to call an engineer to it now but they have not arrived yet. I'd just like to get rid of this 2552 error for now as the thing wont even let me scan to network/email any more.

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