250ci background, *another one

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • jmaister
    certified scrub

    Site Contributor
    500+ Posts
    • Aug 2010
    • 755

    #1

    250ci background, *another one

    full page, 2mm interval, very even.

    Not drum, not charge, DLP? primary transfer roller?

    the troubleshooting guide suggested tweak had no apparent effect.

    edit:
    2mm over 8 1/2" is about 215.9, divided by 2 is 107 ish. Guesstimating imaging process takes 1 sec for 30ppm machine, and 1 sec fro paper transport. That gives me about a frequency of the AC.

    Assuming its AC, which component would cause that?


    no, I tried to tell my doc I'm crazy.

    and uh, springbreak, things are slow.
    Last edited by jmaister; 03-22-2011, 10:54 PM.
    Idling colour developers are not healthy developers.
  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 23009

    #2
    So, your image defect repeats at 2 mm intervals, or ~107 repetitions per page?

    Well the drum will be ~95 mm intervals.
    Primary charge will be ~38 mm intervals.

    For starters, what colors are affected by your defect, in sim U089, Gray test patterns? Can you attach a scan?

    I suspect that you've got a charge loss affecting mainly one color, and the source could be developing bias short or drum ground loss.
    I doubt that it would be a drive problem because of the short interval. =^..^=
    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

    • jmaister
      certified scrub

      Site Contributor
      500+ Posts
      • Aug 2010
      • 755

      #3
      K DLP, and yes I believe its the bias as well.

      Its electrical for sure.

      *not on the site, I'm the phone support for this one.
      Last edited by jmaister; 03-23-2011, 12:07 AM.
      Idling colour developers are not healthy developers.

      Comment

      • blackcat4866
        Master Of The Obvious

        Site Contributor
        10,000+ Posts
        • Jul 2007
        • 23009

        #4
        I would try the black developing drive motor first, due to it's history of problems. Second choice, black developing unit. I would be nice if you had a scrap black developing unit that you could swap in for diagnostics.

        You know the same motor is used elsewhere in the main drive. As a test you could switch the black developing drive motor with the black cleaning motor to see if you can change the defect.
        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

        Working...