Canon IRAC5235i Graining / Feint Prints and copies

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  • SAZ911
    Trusted Tech

    100+ Posts
    • Mar 2013
    • 193

    #1

    [Misc] Canon IRAC5235i Graining / Feint Prints and copies

    Hi Guys,

    Need some ideas.....

    I have a Canon IRAC5235i that has a lot of gaining on the page, much like what it looks like when your developer is shot....(white dots everywhere)

    I have attached a sample of what is happening, there first picture (PG10) is a sample of the fault, the second is a Sample (PG10) of what it should look like.
    New Doc 2017-09-04-1.pdf

    Seeing as it looked like Dev we went with that first, we have since replaced all four Devs, all four Drum units, and have not managed to improve the image.(Maybe a slight difference but not enough to resolve the issue).

    We have then replaced the complete ITB Assy, assuming it my be the primary transfer rollers, and no difference either.

    Replaced so far...

    ITB Assy
    Dev Units x 4
    Drum Units x 4
    2nd Transfer Roller

    Any ideas will be greatly appreciated......thanks.....
    SAZ911..........
  • jamal121
    Technician
    • Nov 2010
    • 10

    #2
    Re: Canon IRAC5235i Graining / Feint Prints and copies

    HI.maybe you can check this
    Secondary Transfer Outer Roller
    Since the resistance of a paper changes when the recycled paper having bad surface nature
    is used under the high temperature and high humidity environment, the current value of the
    Secondary Transfer may be insufficient. As a result, the blank area caused by Secondary
    Transfer failure may occur.
    [Occurrence condition]
    In case that the recycled paper having bad surface nature is used under the high temperature
    and high humidity environment.
    This phenomenon will be more obvious when a blue solid image is copied.
    [Remedy]
    Please perform the following steps.
    1) Check environmental classification inside the machine.
    Indication of inside environmental classification (COPIER>DISPLAY>MISC>ENV-TR)
    <Level1>
    2) Check the "paper type" when the poor image occurred. (Example: Plain paper 1)
    3) Check the "printing surface" which the poor image occurred. (Example: In the case of a first
    side)
    4) Perform adjustment of secondary transcription ATVC target current (COPIER>ADJUST>H
    VTR>XXXX).
    Set the setting value of the applicable service mode to "+10" after checking the sub-item
    name corresponding to XXXX from the following table. If not improved, please increase the
    setting value by +10 each.
    (Example: When the paper type is the plain paper 1, environmental classification is 1 and it is
    on a first side, COPIER>ADJUST>HVTR>2TR-N1)
    [Notes about remedy]
    If the service mode is changed, the life of the Secondary Transfer Outer Roller will be
    influenced.
    For this reason, do not set the setting value to +80 or more at the maximum.

    Comment

    • teckat
      Field Supervisor

      Site Contributor
      10,000+ Posts
      • Jan 2010
      • 16084

      #3
      Re: Canon IRAC5235i Graining / Feint Prints and copies

      --Stop an image of a pg 10 on the ITB belt.

      --Is image good on the belt.


      if good-----Check secondary transfer roller bias contacts-----clean if necessary

      bias.jpg
      bias2.jpg



      how is image before FIXING
      **Knowledge is time consuming, exhausting and costly for a trained Tech.**

      Comment

      • dan7777
        Senior Tech

        500+ Posts
        • Dec 2012
        • 680

        #4
        Re: Canon IRAC5235i Graining / Feint Prints and copies

        Originally posted by SAZ911
        Hi Guys,

        Need some ideas.....

        I have a Canon IRAC5235i that has a lot of gaining on the page, much like what it looks like when your developer is shot....(white dots everywhere)

        I have attached a sample of what is happening, there first picture (PG10) is a sample of the fault, the second is a Sample (PG10) of what it should look like.
        [ATTACH]37525[/ATTACH]

        Seeing as it looked like Dev we went with that first, we have since replaced all four Devs, all four Drum units, and have not managed to improve the image.(Maybe a slight difference but not enough to resolve the issue).

        We have then replaced the complete ITB Assy, assuming it my be the primary transfer rollers, and no difference either.

        Replaced so far...

        ITB Assy
        Dev Units x 4
        Drum Units x 4
        2nd Transfer Roller

        Any ideas will be greatly appreciated......thanks.....
        The post of stopping the machine while making a copy of test chart 10 and look at image on belt was a very good idea. If you have the same issue on the belt you may want to try the high voltage unit. The second transfer roller assembly is easy to swap also. There was a kit for the spots but since you swapped ITB assembly it probably is not the charge rollers. Another easy thing to try is to push on the right side door when making test chart.

        Comment

        • SAZ911
          Trusted Tech

          100+ Posts
          • Mar 2013
          • 193

          #5
          Re: Canon IRAC5235i Graining / Feint Prints and copies

          Originally posted by teckat
          --Stop an image of a pg 10 on the ITB belt.

          --Is image good on the belt.


          if good-----Check secondary transfer roller bias contacts-----clean if necessary

          [ATTACH=CONFIG]37531[/ATTACH]
          [ATTACH=CONFIG]37532[/ATTACH]



          how is image before FIXING

          Hi Teckat,

          Thanks bud, you hit the nail on the head........the Bias tab was stuck in.

          Thanks bud.....
          SAZ911..........

          Comment

          • teckat
            Field Supervisor

            Site Contributor
            10,000+ Posts
            • Jan 2010
            • 16084

            #6
            Re: Canon IRAC5235i Graining / Feint Prints and copies

            Originally posted by SAZ911
            Hi Teckat,

            Thanks bud, you hit the nail on the head........the Bias tab was stuck in.

            Thanks bud.....


            The Dude.jpgwelcome
            **Knowledge is time consuming, exhausting and costly for a trained Tech.**

            Comment

            • copier tech
              Field Supervisor

              5,000+ Posts
              • Jan 2014
              • 8084

              #7
              Re: Canon IRAC5235i Graining / Feint Prints and copies

              Originally posted by teckat


              [ATTACH=CONFIG]37540[/ATTACH]welcome
              Still got it Teckat! lol
              Let us eat, drink, and be merry, because tomorrow we may die!

              For all your firmware & service manual needs please visit us at:

              www.copierfirmware.co.uk - www.printerfirmware.co.uk

              Comment

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