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  1. #11
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    Re: Docucolor 252 yellow streak

    Thanks for the advice.

    Yellow drum and dev looked good.

    Client has ordered new ros assembly. What's the easiest way to ensure it is the ros before I open the new unit?

    Kind regards.

    Quote Originally Posted by adriansto View Post
    You can cover the ros window with black paper strip and see if the band appear again.
    I will look at the position of yellow drum and yellow dev. assy

  2. #12
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    Docucolor 252 yellow streak

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    Re: Docucolor 252 yellow streak

    Quote Originally Posted by fatfingers73 View Post
    Thanks for the advice.

    Yellow drum and dev looked good.

    Client has ordered new ros assembly. What's the easiest way to ensure it is the ros before I open the new unit?

    Kind regards.
    As I said, cover the yellow ros window and do same print test. If the Y band is still on the paper the ros unit is good. If theY band disappear then may be the ros unit is defective. Print from service menu yellow print tests at 10%, 20%, 30%, 50% coverage. If all the test prints are uniform then again the ros is good

  3. #13
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    Re: Docucolor 252 yellow streak

    Quote Originally Posted by adriansto View Post
    You can cover the ros window with black paper strip and see if the band appear again.
    I will look at the position of yellow drum and yellow dev. assy

    hey its looks like bad drum ,just try another drum ,switch cyan or magenta if their good . or maybe a lose internal lens inside ros assy.


    Hope this help


    Wiwa 72

    Gonzos build v 1.0

  4. #14
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    Re: Docucolor 252 yellow streak

    Thanks, already tried switching drums.

    Going back tonight to fit new ros assembly. Will update thread later.

    Cheers.


    Quote Originally Posted by WIWA View Post
    hey its looks like bad drum ,just try another drum ,switch cyan or magenta if their good . or maybe a lose internal lens inside ros assy.


    Hope this help


    Wiwa 72

    Gonzos build v 1.0

  5. #15
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    Re: Docucolor 252 yellow streak

    Update:

    Fitted new yellow ros and everything looked good for around 50 copies/prints.

    Then yellow band started to return, it now comes and goes!

    It's driving me mad! Any advice would be great

    When the fault is there yellow is missing from the print apart from the 1-2 inch band at the top of the sheet. It's like it's squashing all the yellow to the top of the sheet.

    I've never had this before on any brand of machine.

    Less importantly there are three little marks on each copy/print around 19cm apart. They're there on colour, mono and single colour (always black marks). They're not coming from drums or transfer belt?

    Ideas please? Thank you.

  6. #16
    Field Supervisor 500+ Posts Exok's Avatar
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    Re: Docucolor 252 yellow streak

    So, all the yellow is missing from the print and its all condensed into a band of yellow at the top of the sheet?

    Drum and DV units have been changed or tested and found working.

    New ROS assembly installed.

    I would try the image processing pwb next. If the laser is not the cause then the laser is getting the wrong instructions on where to expose the drum.

  7. #17
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    Re: Docucolor 252 yellow streak

    Thanks for that, I was thinking board next.

    I take it this is the one the ros ribbon cables are connected to?

    Can't find it in service manual, do you know part number?

    Thank you.


    Quote Originally Posted by Exok View Post
    So, all the yellow is missing from the print and its all condensed into a band of yellow at the top of the sheet?

    Drum and DV units have been changed or tested and found working.

    New ROS assembly installed.

    I would try the image processing pwb next. If the laser is not the cause then the laser is getting the wrong instructions on where to expose the drum.

  8. #18
    Service Manager 1,000+ Posts
    Docucolor 252 yellow streak

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    Re: Docucolor 252 yellow streak

    These flat cables could also make problems. You should try changing them before replacing board.

  9. #19
    Service Manager 1,000+ Posts
    Docucolor 252 yellow streak

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    Re: Docucolor 252 yellow streak

    After changing ROS MaxSetup procedure was done ?

  10. #20
    Syrinxcs
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    Re: Docucolor 252 yellow streak

    Is that a test printout? Looks like your color registration is off. The lines on the paper aren't laying on top of each other.


    Quote Originally Posted by fatfingers73 View Post
    Anyone come across this before?

    Tried swapping drums and dev tanks but still getting thick yellow band across top of copies/prints.

    Machine has recently been relocated and was fine before the move.

    The yellow band is on the rear of the transfer belt when I pull it out.

    Cleaned all ros windows.

    Any advice would be appreciated.

    Thanks.

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