Coverage with M and C on C450P

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  • brenni
    Technician
    • Sep 2008
    • 38
    #1

    Coverage with M and C on C450P

    Hi,

    on my C450p i have poor image density on C and M; Y and Bk are working perfect.
    I already changed:
    - IUs; (tried several brank new)
    - transfer roller
    - belt
    - TCR sensors
    - LPH LED assy

    any ideas where to go next?
    Tags: c45, c450, c450p, coverage, density, image, lph, tcr, transfer
    • mrwho
      Major Asshole!

      Site Contributor
      2,500+ Posts
      • Apr 2009
      • 4299
      #2
      Did you begin by calibrating the machine?
      ' "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

        • brenni
          Technician
          • Sep 2008
          • 38
          #3
          calibrating? as in xrite or gretag?
          the problem is even with testprint from the machine (gradation test prints for exampel) the coverage is low. looks like spots missing

            Comment

            • mrwho
              Major Asshole!

              Site Contributor
              2,500+ Posts
              • Apr 2009
              • 4299
              #4
              I'd check the HV contacts next, then. And, if possible, try with a different HV board.
              ' "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

                • brenni
                  Technician
                  • Sep 2008
                  • 38
                  #5
                  which one? hv1 or 2?

                    Comment

                    • brenni
                      Technician
                      • Sep 2008
                      • 38
                      #6
                      Solved.

                      it was a cleaning issue.
                      cleaned all HV contacts above LPH assey in the back of the machine, grad adjust and voila thats it!

                        Comment

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