Biz 224 marks

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • copyman
    Owner / Technician

    Site Contributor
    2,500+ Posts
    • Sep 2005
    • 4213
    #1

    Biz 224 marks

    I'm getting these black marks on the page (see sample). Happening every color & b&w pages. Replaced transfer belt and didn't help. Don't see any marks on any drums. All drum are over life so I'm going to start with replacing the K drum.

    I guess this might answer my question, if you roll the paper up and put the repeat defect on top of next defect it looks to be the size of the drum, does this always mean it is one of the drums? My thought is even though I don't see the mark on drum when out of machine it only does it when operating.

    What's throwing me off is I ran single color test sheets in service mode and every color had the marks, does the black drum & developer units turn even when doing a single test page of another color?

    Wanted to add, secondary transfer roller looks good. Also like I posted the space between marks are about the size of drum which is larger than trans roll. So I ruled that out.
    Attached Files
    Last edited by copyman; 04-26-2018, 12:02 AM.
    Tags: color, drum, marks, page, single
    • guitar9199
      Service Manager

      Site Contributor
      1,000+ Posts
      • Sep 2016
      • 1097
      #2
      Re: Biz 224 marks

      If you replaced the ITB assembly, that should take the belt and drive rollers out of the equation. Check the developer roller for any marks or foreign matter... also, have you checked the transfer roller for debris?

      But yeah...don't let that drum go too much over its rated life...bad things happen to the 4 series if you get a drum that starts arcing.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22696
          #3
          Re: Biz 224 marks

          That looks like a knife scar to me ... in the fuser belt or pressure roller. What is the interval in mm?

          Yes, on single color prints all developing units and drums rotate, so a fault on any of the drums will appear on every single color print, but ... the anomaly will stay the color of the drum. So if the scratch is on the cyan drum, you'll get a cyan scratch on yellow, magenta, cyan, and black single color prints.
          I don't think that your enduser can get to the drum (to damage it) without removing the unit.

          It sure would be nice if Konica Minolta put a repetitive defect ruler in their manuals, like Lexmark, Kyocera, Toshiba, Brother, Kip, and most other manufacturers. =^..^=
          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

            • Woxner
              Senior Tech

              500+ Posts
              • Jul 2011
              • 808
              #4
              Re: Biz 224 marks

              100% its the drum

                Comment

                • copier tech
                  Field Supervisor

                  5,000+ Posts
                  • Jan 2014
                  • 7930
                  #5
                  Re: Biz 224 marks

                  If you want to be 100% sure it is caused by the K drum, you can swap it with another colour, say yellow, all you need to do is swap the chip over from one drum to the other (chip is on underside front of drum 1x tiny black screw) If the black make changed to yellow its the drum & fault if you still get the mark its not the drum.
                  Let us eat, drink, and be merry, because tomorrow we may die!

                  For all your firmware & service manual needs please visit us at:

                  www.copierfirmware.co.uk - www.printerfirmware.co.uk
                  ​

                    Comment

                    • copyman
                      Owner / Technician

                      Site Contributor
                      2,500+ Posts
                      • Sep 2005
                      • 4213
                      #6
                      Re: Biz 224 marks

                      Thanks for the replies. Going back with new K drum & dev unit. Will post after what it was.

                        Comment

                        • CraigW
                          Trusted Tech

                          Site Contributor
                          250+ Posts
                          • Dec 2010
                          • 417
                          #7
                          Re: Biz 224 marks

                          4 series drum repetitive = 95mm.

                            Comment

                            • copyman
                              Owner / Technician

                              Site Contributor
                              2,500+ Posts
                              • Sep 2005
                              • 4213
                              #8
                              Re: Biz 224 marks

                              Turned out to be the black drum as suspected. Really weird the drum had no marks on it. Going to take apart and probably find a small piece of paper stuck in cleaning blade, etc.

                                Comment

                                Previous template Next
                                Working...