c451 intermitent bad copies

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  • mrushing
    Technician
    • Mar 2008
    • 27
    #1

    c451 intermitent bad copies

    having problems with this machine I am getting some weird shadows on copies but it comes and goes, unit has new image units and new oem toner, unit has about 384,000 copies on it.. can email a sample tried uploading but it kept saying upload failed
    Tags: 870, bad, black, c45, c451, c55, c550, copies, drop, graphics, info, intermitent, large, life, models, mrwho, old, part, patches, replace, roller, shadow, shadows, sort, time, transfer
    • jeroen2005
      Technician
      • Feb 2008
      • 48
      #2
      Replace the Image tranfer belt unit .What is the life span on the ITB?

        Comment

        • minimerlin
          Senior Tech

          Site Contributor
          500+ Posts
          • Nov 2007
          • 851
          #3
          Originally posted by mrushing
          having problems with this machine I am getting some weird shadows on copies but it comes and goes, unit has new image units and new oem toner, unit has about 384,000 copies on it.. can email a sample tried uploading but it kept saying upload failed
          Is it like a halo effect or just offsetting? There is a modification to get rid of this problem..you need to fit a mylar film onto the 2nd image transfer plate.( the silver plate next too the transfer roller) The details are in a mod instruction...can`t lay my hands to it at present though.
          Please do not PM me without asking first.

            Comment

            • lucky13
              Trusted Tech

              100+ Posts
              • May 2008
              • 125
              #4
              are the shadows large black patches? or are they small shadows at the end of words or graphics .

                Comment

                • mrushing
                  Technician
                  • Mar 2008
                  • 27
                  #5
                  Send me your email and i can send you a pdf of the problem abcrushing@consolidated.net

                    Comment

                    • mrwho
                      Major Asshole!

                      Site Contributor
                      2,500+ Posts
                      • Apr 2009
                      • 4299
                      #6
                      Originally posted by lucky13
                      are the shadows large black patches? or are they small shadows at the end of words or graphics .
                      Sorry for digging up this old thread, but I'm having now this problem - shadows at the end of words. I'm about to order a new IU, but if there's any info I should know, please tell me.

                      Cheers!
                      ' "But the salesman said . . ." The salesman's an asshole!'
                      Mascan42

                      'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
                      Ibid

                      I'm just an ex-tech lurking around and spreading disinformation!

                        Comment

                        • tech51
                          Senior Tech

                          500+ Posts
                          • Jan 2009
                          • 846
                          #7
                          If its a sort of drop shadow effect I would replace the transfer roller, have seen this on both c451 and c550 models...

                            Comment

                            • minimerlin
                              Senior Tech

                              Site Contributor
                              500+ Posts
                              • Nov 2007
                              • 851
                              #8
                              Originally posted by mrwho
                              Sorry for digging up this old thread, but I'm having now this problem - shadows at the end of words. I'm about to order a new IU, but if there's any info I should know, please tell me.

                              Cheers!
                              Mrwho, you do not need to fit an IU, the problem is caused by the metal plate next to the transfer roller, there is a mylar mod to fit over this part. A00H703401 Guide Sheet. I normally fit a new transfer roller at the same time. The guide sheet is the fix, I did one just the other week, machine (c550 ) has never done it before and then suddenly at 995K...it started. I now fit this guide sheet to all the c451,550,650 as a pre-emptive strike!!
                              Please do not PM me without asking first.

                                Comment

                                • mrwho
                                  Major Asshole!

                                  Site Contributor
                                  2,500+ Posts
                                  • Apr 2009
                                  • 4299
                                  #9
                                  Thank you both for your replies - ordered the part as we speak. Will keep you posted!
                                  ' "But the salesman said . . ." The salesman's an asshole!'
                                  Mascan42

                                  'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
                                  Ibid

                                  I'm just an ex-tech lurking around and spreading disinformation!

                                    Comment

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