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  1. #1
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    Could this be a damaged transfer belt?

    Last week, I was printing large amount of colors on matte stock thick 4 and ran out of paper only to notice 3 hours later...
    Had a couple of sheets left, printed perfectly then the next day I noticed lines on all pages being printed (sometimes faded, sometimes dark).
    Ran some blank pages on single colors C, M, Y, K and all 4 different pages were showing the lines.
    My black drum needs replacing soon but I'm not sure its the issue here.
    Also, the lines are like half the page only and the other half is perfectly white.
    Printer: Bizhub C308 - Attached pictures of the prints with lines.
    Thanks for your time !
    20210612_104847.jpg20210222_141130.jpg

  2. #2
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    Re: Could this be a damaged transfer belt?

    Almost definitely the black drum.

  3. #3
    Service Manager 10,000+ Posts
    Could this be a damaged transfer belt?

    Phil B.'s Avatar
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    Re: Could this be a damaged transfer belt?

    Quote Originally Posted by Beastfury12 View Post
    Last week, I was printing large amount of colors on matte stock thick 4 and ran out of paper only to notice 3 hours later...
    Had a couple of sheets left, printed perfectly then the next day I noticed lines on all pages being printed (sometimes faded, sometimes dark).
    Ran some blank pages on single colors C, M, Y, K and all 4 different pages were showing the lines.
    My black drum needs replacing soon but I'm not sure its the issue here.
    Also, the lines are like half the page only and the other half is perfectly white.
    Printer: Bizhub C308 - Attached pictures of the prints with lines.
    Thanks for your time !
    20210612_104847.jpg20210222_141130.jpg

    what are the life counts on the rest of the drums and dev units?

    what is the life count on the ITB and fuser?

    total page counts?

    did you specify EXACTLY what gsm the media was?

    are you using Genuine OEM toners and drums?

  4. #4
    Master Of The Obvious 10,000+ Posts
    Could this be a damaged transfer belt?

    blackcat4866's Avatar
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    Re: Could this be a damaged transfer belt?

    To me, this look like toner built up on the heat sleeve. This can happen if the temperature is not high enough for your stock ... or if your stock is too heavy for the Thick4 setting. It's simple enough to confirm. Look at the fuser roller/sleeve.

    What I would do is set a tray for Thick4 but install 200gsm media at the full width of the roller, then print off white pages. The toner build up will print off onto the paper.

    You haven't specified what media: gsm. 300 gsm is extremely optimistic for this machine. =^..^=
    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
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    Re: Could this be a damaged transfer belt?

    Quote Originally Posted by Phil B. View Post
    what are the life counts on the rest of the drums and dev units?

    what is the life count on the ITB and fuser?

    total page counts?

    did you specify EXACTLY what gsm the media was?

    are you using Genuine OEM toners and drums?

    Drum Life: CMY 48% and K 3%.
    Fuser: 80%
    ITB: 59%
    TR: 77%
    Total Page Count: 117k
    The media i usually print are 80, 130 and 280gsm (max i ever ran through was 300g).
    Yes, I am using all genuine toner / consumable from our local KM dealer.

  6. #6
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    Re: Could this be a damaged transfer belt?

    Quote Originally Posted by blackcat4866 View Post
    To me, this look like toner built up on the heat sleeve. This can happen if the temperature is not high enough for your stock ... or if your stock is too heavy for the Thick4 setting. It's simple enough to confirm. Look at the fuser roller/sleeve.

    What I would do is set a tray for Thick4 but install 200gsm media at the full width of the roller, then print off white pages. The toner build up will print off onto the paper.

    You haven't specified what media: gsm. 300 gsm is extremely optimistic for this machine. =^..^=
    The fuser roller is perfectly clean and smooth no traces of anything. Running an a3 page and opened the side door, and the marks would start when in contact with the ITB.

    I did ran empty thick 4 pages (mainly 280g) and 20 copies later the lines would darken.

    Media is 80, 130 and 280. Very Rare use of 300.

  7. #7
    Master Of The Obvious 10,000+ Posts
    Could this be a damaged transfer belt?

    blackcat4866's Avatar
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    Re: Could this be a damaged transfer belt?

    Transfer belt cleaning issues typically do not look like this, and typically stay the same from pg1 to pg30. To be sure though, just pop the door open sometime around pg 25 and take a look at the transfer belt.

    It could conceivably be the black drum, especially at 3%.Just examine the drum. If it's not cleaning, you'll see it on the drum or on the primary transfer roller.

    Based on your consumable yields, I'd say that the black drum is the most likely. =^..^=
    Last edited by blackcat4866; 06-19-2021 at 03:49 PM.
    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 =^..^=

  8. #8
    Master Of The Obvious 10,000+ Posts
    Could this be a damaged transfer belt?

    blackcat4866's Avatar
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    Re: Could this be a damaged transfer belt?

    One more thought: You said that you were using Thick4 media type ... on 80 gsm? Incorrect heat setting too hot OR to cold will produce the same effect. If you're using 80gsm try Plain paper media setting. =^..^=
    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 =^..^=

  9. #9
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    Re: Could this be a damaged transfer belt?

    Donít forget the black drum is always touching the belt so wears faster.

    Also I donít think Iíve ever seen one that got to 3% of life that didnít need replacing.

  10. #10
    Service Manager 5,000+ Posts
    Could this be a damaged transfer belt?

    copier tech's Avatar
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    Re: Could this be a damaged transfer belt?

    Quote Originally Posted by Beastfury12 View Post
    Last week, I was printing large amount of colors on matte stock thick 4 and ran out of paper only to notice 3 hours later...
    Had a couple of sheets left, printed perfectly then the next day I noticed lines on all pages being printed (sometimes faded, sometimes dark).
    Ran some blank pages on single colors C, M, Y, K and all 4 different pages were showing the lines.
    My black drum needs replacing soon but I'm not sure its the issue here.
    Also, the lines are like half the page only and the other half is perfectly white.
    Printer: Bizhub C308 - Attached pictures of the prints with lines.
    Thanks for your time !
    20210612_104847.jpg20210222_141130.jpg
    Best way to diagnose is to run gradation test prints in CE mode 1x of each colour om on A3 etc.

    Also your samples were these printed SEF or LEF ?

    However the print defect looks black & your black drum has 3% remaining I would suspect that is the issue.


    Let us eat, drink, and be merry, because tomorrow we may die!

    For all your firmware & service manual needs please visit us at:

    www.copierfirmware.co.uk - www.printerfirmware.co.uk




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