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  1. #1
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    Cause for repeating black spot?

    Hi All,

    I'm looking to get some input on what the cause for this repeating defect might be. It is a black spot that occurs about every 3 3/4" and they are in the direction of printing.

    We do print labels occasionally. One thought was that some sticky stuff got on the black drum. Another thought is that the black drum is shot and needs replacement. I don't have a replacement drum so I'm looking for a solution I can do with cleaning or some such easy handling.

    Any input would be welcome.

    Thanks.
    Bret

    (I tried, with no success to attach a photo. I'll leave it as a comment.)

  2. #2
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    Re: Cause for repeating black spot?

    I'm having technical difficulties uploading this photo...

    I'll try from a different computer in a bit.

  3. #3
    Service Manager 10,000+ Posts
    Cause for repeating black spot?

    Phil B.'s Avatar
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    Re: Cause for repeating black spot?

    Quote Originally Posted by bret@cos.flag.org View Post
    Hi All,

    I'm looking to get some input on what the cause for this repeating defect might be. It is a black spot that occurs about every 3 3/4" and they are in the direction of printing.

    We do print labels occasionally. One thought was that some sticky stuff got on the black drum. Another thought is that the black drum is shot and needs replacement. I don't have a replacement drum so I'm looking for a solution I can do with cleaning or some such easy handling.

    Any input would be welcome.

    Thanks.
    Bret

    (I tried, with no success to attach a photo. I'll leave it as a comment.)

    re: repeating defect... there is a repetitive defect ruler in the service manual .. it measures in mm

    re: inability to load images found in the FAQ pages for the site: https://www.copytechnet.com/forums/f...b3_attachments

    labels (even the suggested types ooze glue out and deposits them on rollers .. drums .. belts use IPA and a lint free cloth to clean it off,

    be nice to know the life countson service parts.

    are they using genuine oem toners and drums

  4. #4
    Master Of The Obvious 10,000+ Posts
    Cause for repeating black spot?

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    Re: Cause for repeating black spot?

    Try attaching a smaller sized file ... preferably less than 1MB.

    ... and it might help to know what model machine that you're referring to. 3 3/4" (or 96mm) is the typical circumference of an organic drum, depending on what model that you have. Can I assume that it's a color machine, since you specify the "black" drum? =^..^=
    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 =^..^=

  5. #5
    Service Manager 10,000+ Posts
    Cause for repeating black spot?

    Phil B.'s Avatar
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    Re: Cause for repeating black spot?

    Quote Originally Posted by bret@cos.flag.org View Post
    I'm having technical difficulties uploading this photo...

    I'll try from a different computer in a bit.
    it's not the computer it's the SIZE of the file like BC said.

  6. #6
    Retired 10,000+ Posts slimslob's Avatar
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    Re: Cause for repeating black spot?

    Try printing to a pdf, Microsoft Print to PDF driver, and then upload the PDF.

  7. #7
    IT Manager 5,000+ Posts bsm2's Avatar
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    Re: Cause for repeating black spot?

    Roll the paper until the spots match and that's the size of the part that is causing the marks

    fuser roller drum etc.......

    Old school trick

  8. #8
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    Re: Cause for repeating black spot?

    Quote Originally Posted by Phil B. View Post
    re: repeating defect... there is a repetitive defect ruler in the service manual .. it measures in mm

    re: inability to load images found in the FAQ pages for the site: https://www.copytechnet.com/forums/f...b3_attachments

    labels (even the suggested types ooze glue out and deposits them on rollers .. drums .. belts use IPA and a lint free cloth to clean it off,

    be nice to know the life countson service parts.

    are they using genuine oem toners and drums
    Thanks Phil.

    I haven't found that repeating defect guide in the service manual. But knowing it is there is good, I'll keep looking. I've done a search on the PDF for repepating and for defect. I figured that would work, but no luck yet.

    Thanks for the advice on uploading images, I'll check that out.

    I checked out the drum last night and it is actually a wear mark / scratch. No amount of rubbing on the drum was taking it off. I could feel it in the drum surface.

    I didn't have time to check the counts, it was already really late when I was able to get to the machine and all concerned were in a hurry to do the absolute minimum and head out.

    Yes the drums and toner are for sure genuine, gotten direct from Canon.

    The plan is that I put in a new black drum tonight.

  9. #9
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    Re: Cause for repeating black spot?

    Quote Originally Posted by blackcat4866 View Post
    Try attaching a smaller sized file ... preferably less than 1MB.

    ... and it might help to know what model machine that you're referring to. 3 3/4" (or 96mm) is the typical circumference of an organic drum, depending on what model that you have. Can I assume that it's a color machine, since you specify the "black" drum? =^..^=
    Thanks. Will try uploading my photos in a minute, with a smaller file size.

    The model is a Canon IR ADV DX 5760i with an inner finisher and a 2-cassette paper addition, making 4 paper cassettes.

    Yes it's a color machine.

    Good to know the circumference of a drum. Why do you say "organic drum"? Are there non-organic drums?

  10. #10
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    Re: Cause for repeating black spot?

    2021-04-28-165444.jpg

    2021-04-29-094510.jpg

    Hopefully I didn't reduce the images too much!

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