(What appears to be) bad transfer on ProC901S

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • mrwho
    Major Asshole!

    Site Contributor
    2,500+ Posts
    • Apr 2009
    • 4303

    [CQ] (What appears to be) bad transfer on ProC901S

    Hello guys.

    I've been around this almost all day and still don't know what the hell this is.

    Here's an example of a sheet of paper jammed as it entered the fusing unit. The black is pure black and it's supposed to be a 30% solid gray, with no gradient. If I print it in another color, the defect is much less noticeable, but it's there.

    Paper.jpg

    And here's the latent image on the belt, appears to be perfectly even.

    Belt.jpg

    No mater where I fiddle, I see no difference whatsoever.

    Any suggestions are welcome.

    Cheers!
    Attached Files
    ' "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!
  • mrwho
    Major Asshole!

    Site Contributor
    2,500+ Posts
    • Apr 2009
    • 4303

    #2
    Re: (What appears to be) bad transfer on ProC901S

    Well, aparently no one has had this problem on this machine.

    I've almost changed my mind on the second transfer bet when it appeared to me that the latent image on the transfer belt is somewhat more dense on one side than on the other - but it is so subtle and I was so tired, I can't be 100% sure. But I'm considering all things up to the PTR now.

    Honestly, my sense of awe for this machine has turned into contempt now.
    ' "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

    • Tonerbomb
      AutoMajical Resolutionist

      Site Contributor
      2,500+ Posts
      • Feb 2005
      • 2589

      #3
      Re: (What appears to be) bad transfer on ProC901S

      do you have the TCRU kits for this machine?? if so it is easy to swap out the ptr unit. Also you could have an issue with the ITB bias rollers making contact with the belt and drum. Most of my uneven density issue though have been with developer units clogging up the doctor gap......
      Mystic Crystal Revelations

      Comment

      • mrwho
        Major Asshole!

        Site Contributor
        2,500+ Posts
        • Apr 2009
        • 4303

        #4
        Re: (What appears to be) bad transfer on ProC901S

        Originally posted by Tonerbomb
        do you have the TCRU kits for this machine?? if so it is easy to swap out the ptr unit. Also you could have an issue with the ITB bias rollers making contact with the belt and drum. Most of my uneven density issue though have been with developer units clogging up the doctor gap......
        Thanks for the input.

        I never considered the developer units until now because the defect is visible on all colors (maybe except yellow because it is hard to decipher it against the white of the paper), but I'm now willing to consider that maybe they all went bad in the same manner at the same time. Will pop by the customer and take a swab at those doctor gaps.

        Things that I already replaced: Transfer belt, 2nd transfer rollers (PTR and ITB)

        Things that I already fiddled with that made no difference whatsoever to the defect: 1st transfer rollers (turned them around, changed from one color to another), cleaned ground contacts from all ITB rollers, changed ITB orientation (before replacing with new one), cleaned lasers and laser window glasses, probably more stuff that I can't remember right now.

        At this time, if someone tells me it's a leprechaun inside the machine causing havoc, I'll grab a bb gun and go after it.

        PS: No kits. The developers are almost new (about 100k).
        ' "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

        • mrwho
          Major Asshole!

          Site Contributor
          2,500+ Posts
          • Apr 2009
          • 4303

          #5
          Re: (What appears to be) bad transfer on ProC901S

          So the main problem (bad density in the middle) was solved by replacing a (rather expensive) developing unit.

          On the other hand, the difference of density between the back of the image (backside of the copier) and the rest is a known characteristic, and there's an SP to compensate for that. Always learning.

          Now there is another problem, but I'll open a new thread for that.

          I'm getting to the point where I have nightmares at night about this 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

          • Tonerbomb
            AutoMajical Resolutionist

            Site Contributor
            2,500+ Posts
            • Feb 2005
            • 2589

            #6
            Re: (What appears to be) bad transfer on ProC901S

            Yeah Ricoh is pretty damn proud of those DV units...............
            Mystic Crystal Revelations

            Comment

            Working...