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  1. #1
    Senior Tech 100+ Posts SAZ911's Avatar
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    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..........

  2. #2
    Junior Member
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    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.


  3. #3
    Service Manager 10,000+ Posts
    Canon IRAC5235i Graining / Feint Prints and copies

    teckat's Avatar
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    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.**

  4. #4
    Field Supervisor 500+ Posts dan7777's Avatar
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    Re: Canon IRAC5235i Graining / Feint Prints and copies

    Quote Originally Posted by SAZ911 View Post
    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.....
    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.


  5. #5
    Senior Tech 100+ Posts SAZ911's Avatar
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    Re: Canon IRAC5235i Graining / Feint Prints and copies

    Quote Originally Posted by teckat View Post
    --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

    Hi Teckat,

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

    Thanks bud.....

    SAZ911..........

  6. #6
    Service Manager 10,000+ Posts
    Canon IRAC5235i Graining / Feint Prints and copies

    teckat's Avatar
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    Re: Canon IRAC5235i Graining / Feint Prints and copies

    Quote Originally Posted by SAZ911 View Post
    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.**

  7. #7
    Field Service Engineer 1,000+ Posts
    Canon IRAC5235i Graining / Feint Prints and copies

    copier tech's Avatar
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    Re: Canon IRAC5235i Graining / Feint Prints and copies

    Quote Originally Posted by teckat View Post


    The Dude.jpgwelcome
    Still got it Teckat! lol

    Let us eat, drink, and be merry, because tomorrow we may die!

    www.copierfirmware.co.uk

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