MP C2051 / color copy fuzzy

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  • CSI
    Technician

    50+ Posts
    • Oct 2008
    • 73
    #1

    [CQ] MP C2051 / color copy fuzzy

    hi,

    Sorry, i'm using Google translate ...

    On a MP C2051 I have a shift of color synchronisation

    Sheet sort in the sense X, the decalage of color is in the sense Y.
    The decallage is more prononce in yellow on 0.5 millimeter.
    Cyan 0.3 millimeter
    Magenta 0.2 millimeter
    So the color copy is fuzzy

    I have been replaced:
    The 3 color drums
    The ITB complet
    cells DI
    Laser Entier (with the entire procedure that goes well)

    Setting MUSIC 2111 a b c ...
    Firmware are ok

    The problem still persists !!!

    Total color count : 62577 pages
    Total black count : 39850 pages
    Have you a idea ?
    Tags: None
    • Jaxom
      Lead Technician

      Site Contributor
      50+ Posts
      • Apr 2011
      • 62
      #2
      Re: MP C2051 / color copy fuzzy

      Originally posted by CSI
      Setting MUSIC 2111 a b c ...
      Did you do C first then A? C is rough alignment and A is fine alignment.

      That is all I can think of. The only part left is the laser unit.
      Have you tried turning it off and on again?

        Comment

        • ruben
          The New Guy

          1,000+ Posts
          • Oct 2012
          • 1203
          #3
          Re: MP C2051 / color copy fuzzy

          Make sure that the laser and drums are properly screwed in place. Clean the optics and re-run Line Adjustment C then A; twice.

            Comment

            • Eric1968
              Service Manager

              1,000+ Posts
              • Jan 2009
              • 2458
              #4
              Re: MP C2051 / color copy fuzzy

              First thing to do is check the Line Positioning Adjustment result (SP2-194-010-012), and check the counter measure list in the Service Manual. Color Shift can happen in Main Scan (Laser Unit) and Sub Scan direction (Drums). If you know in which direction the shift occurs, then you'll know what to replace or adjust. If the density of the patterns is not enough, the DV-Units can also be a suspect.

              Another solution can be to reset process control data to default for Copy SP (SP5-610) and Printer SP (SP1-011-001). Then run Process Control and Line Adjustment C and A (Run A twice, like Ruben said).

                Comment

                • CSI
                  Technician

                  50+ Posts
                  • Oct 2008
                  • 73
                  #5
                  Re: MP C2051 / color copy fuzzy

                  I will check SP2-194-010-012

                  Ok for C then A twice. I do tomorow.

                    Comment

                    • slimslob
                      Retired

                      Site Contributor
                      25,000+ Posts
                      • May 2013
                      • 36870
                      #6
                      Re: MP C2051 / color copy fuzzy

                      Before doing anything, clean the image density sensor assembly. I have had color registration pull back into alignment just by cleaning the sensor.

                        Comment

                        • CSI
                          Technician

                          50+ Posts
                          • Oct 2008
                          • 73
                          #7
                          Re: MP C2051 / color copy fuzzy

                          The image density sensor assembly is new

                            Comment

                            • slimslob
                              Retired

                              Site Contributor
                              25,000+ Posts
                              • May 2013
                              • 36870
                              #8
                              Re: MP C2051 / color copy fuzzy

                              If I remember correctly, there is something at the front of the machine that tilts the ID sensor assembly into and out of position. If there is anything binding the movement of the ID sensor mount plate, it could cause incorrect positioning of the ID sensor.

                                Comment

                                • Iowatech
                                  Not a service manager

                                  2,500+ Posts
                                  • Dec 2009
                                  • 3930
                                  #9
                                  Re: MP C2051 / color copy fuzzy

                                  Hopefully you can find the "birth certificate" for that machine, the paper that comes with new machines from Ricoh that shows all of the adjustments from the factory. If you can find that, I'd recommend you check that the adjustments listed there are correct first before you try any other new adjustments.
                                  (It sounds a little bit like somebody did a memory reset to the machine when one was not needed. I'm probably wrong, though.)

                                    Comment

                                    • CSI
                                      Technician

                                      50+ Posts
                                      • Oct 2008
                                      • 73
                                      #10
                                      Re: MP C2051 / color copy fuzzy

                                      SP2-194-010-012 report 1

                                      I'll change dev unit color

                                        Comment

                                        • CSI
                                          Technician

                                          50+ Posts
                                          • Oct 2008
                                          • 73
                                          #11
                                          Re: MP C2051 / color copy fuzzy

                                          After struggling a few hours on this damn engine I managed to be correct copies by changing the factory came with my new laser values​​!

                                          Info Data 20140801114141400.pdf

                                            Comment

                                            • zeeaxis
                                              Manager TSD
                                              • Nov 2008
                                              • 28
                                              #12
                                              Re: MP C2051 / color copy fuzzy

                                              Haha..... Birth Certificate....

                                              Originally posted by Iowatech
                                              Hopefully you can find the "birth certificate" for that machine, the paper that comes with new machines from Ricoh that shows all of the adjustments from the factory. If you can find that, I'd recommend you check that the adjustments listed there are correct first before you try any other new adjustments.
                                              (It sounds a little bit like somebody did a memory reset to the machine when one was not needed. I'm probably wrong, though.)

                                                Comment

                                                • Phil B.
                                                  Field Supervisor

                                                  10,000+ Posts
                                                  • Jul 2016
                                                  • 22798
                                                  #13
                                                  Re: MP C2051 / color copy fuzzy

                                                  Originally posted by zeeaxis
                                                  Haha..... Birth Certificate....
                                                  yes that's what Ricoh calls the SMode settings sheet for the machine.. it used to be stored under an inner cover on the front side of the machine..

                                                  it IS actually called the " Birth Certificate "

                                                    Comment

                                                    • slimslob
                                                      Retired

                                                      Site Contributor
                                                      25,000+ Posts
                                                      • May 2013
                                                      • 36870
                                                      #14
                                                      Re: MP C2051 / color copy fuzzy

                                                      Originally posted by CSI
                                                      After struggling a few hours on this damn engine I managed to be correct copies by changing the factory came with my new laser values​​!

                                                      Info Data [ATTACH]25866[/ATTACH]
                                                      In other words you actually followed the service manual directions for replacing the laser diode unit. That must have been a radical concept for you.

                                                        Comment

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