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Thread: C75 bad prints

  1. #1
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    C75 bad prints

    Hey there guys it's been months since we've been able to get a consistent week of prints from the C75.
    It's been one thing or another. Now we are getting these faded looking prints
    Can't pinpoint what it is. We've changed all the colour drums. Think the black drum was new as well but all the colour have been changed since late December.
    Please assist thanks

    Sent from my SM-G955F using Tapatalk

  2. #2
    Service Manager 2,500+ Posts
    C75 bad prints

    BillyCarpenter's Avatar
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    Re: C75 bad prints

    What do the test charts look like?


    11% ANSI A Color 8.5 x 11.pdf

  3. #3
    Service Manager 10,000+ Posts
    C75 bad prints

    Phil B.'s Avatar
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    Re: C75 bad prints

    Quote Originally Posted by positiveg View Post
    Hey there guys it's been months since we've been able to get a consistent week of prints from the C75.
    It's been one thing or another. Now we are getting these faded looking prints
    Can't pinpoint what it is. We've changed all the colour drums. Think the black drum was new as well but all the colour have been changed since late December.
    Please assist thanks

    Sent from my SM-G955F using Tapatalk

    looks like bad dev units... bad transfer..or dirty laser glass.

    what are the counts on the unit?

    OEM drums and toners?

    if you do a stop test is the image on belt and drums good or faded?

    you really need to tell us what you have done besides swapping drums.

  4. #4
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    Re: C75 bad prints

    Quote Originally Posted by BillyCarpenter View Post
    What do the test charts look like?


    11% ANSI A Color 8.5 x 11.pdf
    I'll provide you with that print out

    Sent from my SM-G955F using Tapatalk

  5. #5
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    Re: C75 bad prints

    Quote Originally Posted by Phil B. View Post
    looks like bad dev units... bad transfer..or dirty laser glass.

    what are the counts on the unit?

    OEM drums and toners?

    if you do a stop test is the image on belt and drums good or faded?

    you really need to tell us what you have done besides swapping drums.
    Toners new
    Drums all new drums placed this January
    Black placed in late December.
    I'll get the counts. Not high the printer hasn't run properly since October. Installed new B/C laser unit. The dev units are all but new with the exception of thr black as in all were replaced last quarter of last year.
    The magenta dev unit cover plastic was torn I replaced it but it still spills so I've ordered a full replacement cover due in Friday. Well that dependa.
    But thats it really fuser 89% the only time don't get that heavy fade is black and white.

    Sent from my SM-G955F using Tapatalk

  6. #6
    Technician fugglefeet's Avatar
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    Re: C75 bad prints

    Hi all,

    Is the white connector on the back of the 2nd BTR plugged in? Is there a toner buildup at this connector? Arcing at this connector or a disconnected connector will result in faded image transfer from the IBT belt.

    Hope this helps.

    fugglefeet

  7. #7
    Service Manager 10,000+ Posts
    C75 bad prints

    Phil B.'s Avatar
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    Re: C75 bad prints

    Quote Originally Posted by positiveg View Post
    Toners new
    Drums all new drums placed this January
    Black placed in late December.
    I'll get the counts. Not high the printer hasn't run properly since October. Installed new B/C laser unit. The dev units are all but new with the exception of thr black as in all were replaced last quarter of last year.
    The magenta dev unit cover plastic was torn I replaced it but it still spills so I've ordered a full replacement cover due in Friday. Well that dependa.
    But thats it really fuser 89% the only time don't get that heavy fade is black and white.

    Sent from my SM-G955F using Tapatalk
    Pull the dev units..spin the mag roller.. does it get even coverage.
    Letting a unit sit for a while can affect dev units .. belts.. fuser...
    Esp if left powered on.
    Clean all sensors..internals.. run calibrations.
    Post pdfs of results.

    Sent from my SM-G960U using Tapatalk

  8. #8
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    Re: C75 bad prints

    Thanks for the feedback.
    I was wondering about the fact it's been offline for a while. We hadn't had it on much to be honest. Just been using a small Konika unit.
    Bu I'll try what yiu suggest. So you think it may be the magenta. The tech came in cleaned the laser it was ok for about 50 prints then back again. I'm just wondering if it can spill that bad back on the lasers though?

    Sent from my SM-G955F using Tapatalk

  9. #9
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    Re: C75 bad prints

    Clean ROS
    Check developer covers

  10. #10
    Trusted Tech 50+ Posts zagrex's Avatar
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    Re: C75 bad prints

    Quote Originally Posted by positiveg View Post
    Hey there guys it's been months since we've been able to get a consistent week of prints from the C75.
    It's been one thing or another. Now we are getting these faded looking prints
    Can't pinpoint what it is. We've changed all the colour drums. Think the black drum was new as well but all the colour have been changed since late December.
    Please assist thanks

    Sent from my SM-G955F using Tapatalk

    Make sure you are using genuine toner in your machine!!!!
    this problem happens when the original toner is not used.

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