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  1. #1
    Service Manager 5,000+ Posts
    TA 2552ci loss of color

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    TA 2552ci loss of color

    I purchased a couple of 2552ci's and on one of them I have complete loss of yellow (I toned it up and got some yellow coverage) and the cyan has random white spots. This machine has 91k on the black and 28k for color.


    This is my first time working on this model but I think I know what's causing the problem. I believe the yellow DV unit is depleted of developer and to a lessor degree the same for the cyan DV unit.


    If my suspicion is correct, my question is why are the DV units being depleted? I thought that maybe someone swapped the DV units before returning it back to the leasing company but it shows these are the original DV units.

    PS - I inspected the DV units and there's a lack of developer on the mag roller.

    See attached images.


    yellow dv.pdf
    Embrace the process, not the outcome.

  2. #2
    Service Manager 1,000+ Posts
    TA 2552ci loss of color

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    Re: TA 2552ci loss of color


  3. #3
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    Re: TA 2552ci loss of color

    hi Billy,

    look at the production date: "66" means 2016/ june
    5 years old system with 24k color printouts only.
    I think the dev powder will be "dead"/ destroyed...
    What happens if you run developer refresh by system menue?

  4. #4
    Service Manager 5,000+ Posts
    TA 2552ci loss of color

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    Re: TA 2552ci loss of color

    Quote Originally Posted by KYO_OEM View Post
    hi Billy,

    look at the production date: "66" means 2016/ june
    5 years old system with 24k color printouts only.
    I think the dev powder will be "dead"/ destroyed...
    What happens if you run developer refresh by system menue?
    Hi, KYO

    The yellow page was completely blank at first and when I ran DV refresh I got those yellow bands that are in the picture that I posted. When I inspected the Y DV, I can see that same pattern on the mag roller. I replaced with another Y DV unit and it works fine.

    I was wondering why the yellow DV unit was depleted? You think it's because of age? I will order a new yellow DV unit.
    Embrace the process, not the outcome.

  5. #5
    Service Manager 5,000+ Posts
    TA 2552ci loss of color

    BillyCarpenter's Avatar
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    Re: TA 2552ci loss of color

    Quote Originally Posted by copiertec View Post

    Thanks but I have drive to the DV unit.
    Embrace the process, not the outcome.

  6. #6
    Master Of The Obvious 10,000+ Posts
    TA 2552ci loss of color

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    Re: TA 2552ci loss of color

    Yes, that diagonal pattern of voids is an indicator of developer depletion. And yes, 5 year old lightly used developer can deplete.

    The cyan is a primary charge issue. You can see the streaks crossfeed where cleaning was attempted, and the spots at 37.5mm intervals which are likely lumps in the charge roller. Be sure to reset the charge counter when you change it, or you can get charge errors. =^..^=
    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 =^..^=

  7. #7
    Owner/Service Manager 1,000+ Posts
    TA 2552ci loss of color

    tmaged's Avatar
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    Re: TA 2552ci loss of color

    You can try changing U325 Mode 1 to Mode 2 with new DV-Unit. Mode 2 has mini DV-Refresh after sleep mode. DV- refresh can keep toner charge level even.
    Most of the time it's caused by low volume color prints. The color DV gets a charge, but doesn't get used. After happening continually, the DV sticks to the mag roller. It usually isn't too much of an issue, though.
    Hope that helps !
    -Tony


    www.dtios.com
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  8. #8
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    Re: TA 2552ci loss of color

    i don`t think it`s charge issue because of white spots and not beginning at leading edge
    Looks like magnetic roller circumference.

    But let me try to explain why yellow DV is broken
    It`s 2 component DV
    Developer + Toner
    Developer = metallic powder / "easy explanation"
    Toner ingredients = color, wax, amorhes silicium dioxid + others
    If we have long time running from DV without adding enough toner you get stress for the develoer powder and the circumference from developer will decrease because of not enough toner + silicium will be added.
    wax + silizium is working like a "grease" for the developer powder.
    Without "grease" the developer powder would destroyed
    Between (+) and (-) magnetic pols on the magnet roller we get "toner bags", inside we will have enough needed toner in good condition.
    If we have dev with decreased dev powder circumference, the high from the "bags" will decrease and we get faint color because of not enough toner inside anymore....
    Check service status page and see which consumption would run.
    My experience: consumption < 2% and you can get more stress for developer powder

  9. #9
    Service Manager 5,000+ Posts
    TA 2552ci loss of color

    BillyCarpenter's Avatar
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    Re: TA 2552ci loss of color

    Quote Originally Posted by KYO_OEM View Post
    i don`t think it`s charge issue because of white spots and not beginning at leading edge
    Looks like magnetic roller circumference.

    But let me try to explain why yellow DV is broken
    It`s 2 component DV
    Developer + Toner
    Developer = metallic powder / "easy explanation"
    Toner ingredients = color, wax, amorhes silicium dioxid + others
    If we have long time running from DV without adding enough toner you get stress for the develoer powder and the circumference from developer will decrease because of not enough toner + silicium will be added.
    wax + silizium is working like a "grease" for the developer powder.
    Without "grease" the developer powder would destroyed
    Between (+) and (-) magnetic pols on the magnet roller we get "toner bags", inside we will have enough needed toner in good condition.
    If we have dev with decreased dev powder circumference, the high from the "bags" will decrease and we get faint color because of not enough toner inside anymore....
    Check service status page and see which consumption would run.
    My experience: consumption < 2% and you can get more stress for developer powder

    Thanks KYO. I think you've explained this to me before. I'll have to check back through my notes. Thanks again.


    EDIT: Yes, I have it in my notes. I remember now. The DV unit drive time is running and no toner is being added = stress on DV. And I think this normally happens when the customer is printing mostly black pages??
    Embrace the process, not the outcome.

  10. #10
    Service Manager 5,000+ Posts
    TA 2552ci loss of color

    BillyCarpenter's Avatar
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    Re: TA 2552ci loss of color

    Quote Originally Posted by tmaged View Post
    You can try changing U325 Mode 1 to Mode 2 with new DV-Unit. Mode 2 has mini DV-Refresh after sleep mode. DV- refresh can keep toner charge level even.
    Most of the time it's caused by low volume color prints. The color DV gets a charge, but doesn't get used. After happening continually, the DV sticks to the mag roller. It usually isn't too much of an issue, though.
    Thanks. I'll be sure to do that. Thank you.
    Embrace the process, not the outcome.

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