Problem with KM-C2520

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  • drazen7777
    Technician
    • Sep 2010
    • 40
    #1

    [Misc] Problem with KM-C2520

    Hello

    I would like to ask if somebody had similar case , The problem is that black printing is every fifth to ten pages at one point stopped and moved a few centimeters like it is seen in the attachment. Machine has 260k prints and a new maintenance A+B is installed recently(same thing was before MK)
    Any help is appreciated.

    Regards

    Drazen
    Attached Files
    Technician -- a person who fixes the mistakes made by engineers.
    Tags: black, c252, copyi, duc, main, maintenance, pages, printing, prints, time
    • Metalvoc
      Trusted Tech

      100+ Posts
      • Sep 2008
      • 155
      #2
      Re: Problem with KM-C2520

      Does this happen when copying, or just when printing? You might try re-loading all your firmware. Don't forget that the print system firmware is a separate file on these, and has to be loaded independently.
      I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up - Mark Twain

        Comment

        • JustManuals
          Field Supervisor

          5,000+ Posts
          • Jan 2006
          • 9838
          #3
          Re: Problem with KM-C2520

          This Parts & Service manual can 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

            Comment

            • kyocera.team
              Trusted Tech
              • Aug 2010
              • 126
              #4
              Re: Problem with KM-C2520

              try to install old fuser unit and try it
              good luck

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22973
                  #5
                  Re: Problem with KM-C2520

                  Wow! Not much agreement on this topic.
                  I see this as loss of developing drive, developing bias, or drum ground.

                  For developing drive I'd check:
                  -black developing drive coupler
                  -black rear developer bushings
                  -hand drive the black developing unit to observe any excess drag on the drive.
                  -run black developer drive motor in sim U030

                  For developer bias I'd check:
                  -ground contacts on the inside of the toner hopper
                  -clean & lubricate contacts with conductive grease

                  For drum ground I'd check:
                  -the drum drive couplers can move smoothly
                  -drum shaft has not been arcing/welded to drum motor shaft.
                  -clean any conductive grease from the drum drive coupler. Lubricate with light oil only.

                  =^..^=
                  If you'd like a serious answer to your request:
                  1) demonstrate that you've read the manual
                  2) demonstrate that you made some attempt to fix it.
                  3) if you're going to ask about jams include the jam code.
                  4) if you're going to ask about an error code include the error code.
                  5) You are the person onsite. Only you can make observations.

                  blackcat: Master Of The Obvious =^..^=

                    Comment

                    • drazen7777
                      Technician
                      • Sep 2010
                      • 40
                      #6
                      Re: Problem with KM-C2520

                      I put on machine the latest Firmware (all at once ), i dont think that the problem is with drum developer or fuser because that parts has been changed recently (new maintenance kits a+b). I suspect that the problem is with black drum motor because image is stopped for very short time(some kind of lag) and then resumed like it is shown in the print sample in attachment.(i marked it).doc20110725083358.pdf
                      Technician -- a person who fixes the mistakes made by engineers.

                        Comment

                        • mjunkaged
                          Trusted Tech

                          250+ Posts
                          • Feb 2009
                          • 379
                          #7
                          Re: Problem with KM-C2520

                          Just my two cents, to me the sample looks like the charge is dropping out or shorting for black, causing the other colors to fade at the same time. Since you replaced drum, you're left with high voltage? Blackcat is also on the right track, could be bias leak/connections......... Ok so I was wrong, drum drive! Good to know.
                          Last edited by mjunkaged; 03-12-2014, 03:46 PM.

                            Comment

                            • drazen7777
                              Technician
                              • Sep 2010
                              • 40
                              #8
                              Re: Problem with KM-C2520

                              Originally posted by mjunkaged
                              Just my two cents, to me the sample looks like the charge is dropping out or shorting for black, causing the other colors to fade at the same time. Since you replaced drum, you're left with high voltage? Blackcat is also on the right track, could be bias leak/connections.........

                              It was long time ago , if i can remember the problem was in the motor that drives drum. Didnt post it!
                              Technician -- a person who fixes the mistakes made by engineers.

                                Comment

                                • marley
                                  Technician
                                  • Sep 2010
                                  • 58
                                  #9
                                  Re: Problem with KM-C2520

                                  8263_2fz_0085_sb.pdf
                                  look here

                                    Comment

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