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  1. #1
    Trusted Tech 50+ Posts
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    C552 colour print issues

    Hi guys
    ive got colour print issues. i tried to get a local tech out to me but they were useless when he turned up.

    the colour dont align correctly. and it differs depending on which side of the page its on.

    ive attached a test print for ref. test.pdf
    as you can see the yellow and red are not aligned, but only at bottom of page.


    also got yellow toner issue on one side of the page. again test print attached
    yellow.pdf
    some reason it only happens on the gradiant test print.???

    ive replaced the yellow drum unit. but no go, still got problem.


    some help please.

  2. #2
    Service Manager 2,500+ Posts
    C552 colour print issues


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    Re: C552 colour print issues

    Do you know what the tech did? Did he do the gradation adj, etc? It could be several things, Image units, transfer belt, etc. You may have to bite the bullet and call Konica Minolta and tell them to send an old time tech that knows that machine. There is a possibility Kon/Min may say they are not working on that old model anymore but worth a try.

    Best of luck

  3. #3
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    Re: C552 colour print issues

    Quote Originally Posted by copyman View Post
    Do you know what the tech did? Did he do the gradation adj, etc? It could be several things, Image units, transfer belt, etc. You may have to bite the bullet and call Konica Minolta and tell them to send an old time tech that knows that machine. There is a possibility Kon/Min may say they are not working on that old model anymore but worth a try.

    Best of luck
    He didnt do much, just said to order a new yellow drum, cleaned some rollers. yet problems are still there same before he came.

    ive been looking into the service mode, but little confused on how to do the adjustments.

    how do you adjust the pattern to be inline, if its different across the page (one side ok, other side is out by miles)

  4. #4
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    Re: C552 colour print issues

    It can to be the Sincro Roller hat probleme to move. A little spayoil on the Bearings can helps.

  5. #5
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    Re: C552 colour print issues

    Quote Originally Posted by albemero View Post
    It can to be the Sincro Roller hat probleme to move. A little spayoil on the Bearings can helps.
    where? you need to point this out to me.
    ive got the field service manual.

    whats with the yellow not working right on gradiant pattern, but ok on solid?

  6. #6
    Service Manager 2,500+ Posts
    C552 colour print issues


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    Re: C552 colour print issues

    Sorry but this isn't something easily explained to an end user. This is beyond what an end user should attempt. This is why I said you need to call in a "qualified" and hopefully trained tech on that older model.

    It's your call but if you want to dig deeper into this keep in mind most of times I've seen customers attempt these adjustments it ends up costing way more $$$ than if they just found a tech in first place!

    Why not post if a tech on this forum is in your area and could do the call?

  7. #7
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    Re: C552 colour print issues

    Try clean 2 color registration sensors?

  8. #8
    Service Manager 2,500+ Posts
    C552 colour print issues


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    Re: C552 colour print issues

    Quote Originally Posted by jwai View Post
    Try clean 2 color registration sensors?
    Agree about the sensors but assumed the tech would of done this. If you follow instructions in service manual end user should be able to remove transfer belt and clean the 2 sensors. Again there are risks doing this, i.e. damaging transfer belt, etc. Not saying it's real difficult to do just when you don't do something all the time it makes it much harder with risks! After cleaning the sensors do gradation adj. It's in the service manual

  9. #9
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    Re: C552 colour print issues

    Yellow isssues could be crap blocking the slit glass, registration issues...

    1. Run Stabilzer
    2. Run Gradation Adj
    3. Run 8 color solid pattern
    Replace related items for failures (PH, PCB, MFP board)

    If this is an engine problem you need to perform
    1. trail edge color adj
    2. Color reg adjust
    3. print head skew adj/reset
    4. initialize and image stabilization again

    If you get any codes during any of these steps you would trouble shoot by replacing the related component..As a fully trained tech, I would run from this problem..This machine is obsolete and parts are no longer available. E
    Last edited by emujo2; 01-28-2020 at 06:23 PM.

  10. #10
    RTFM!! 5,000+ Posts allan's Avatar
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    Re: C552 colour print issues

    Print a simple demo page and post that. The first page shows some concerning artifacts like the random magenta lines.
    Yea would agree with the laser glass on the yellow could be covered with toner.
    Whatever

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