Having random color banding on Canon lbp 7660. transfer belt replaced, cleaned all the contacts i could fins, tried different drivers. Still having them. Any ideas would be greatly appreciated. May background is with Kyocera and Sharp, some Oki and toshiba. Apologies if this has been discussed elsewhere.
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Re: canon color banding
Looks like there's still a white blank area around all 4 sides and the banding is only in the image area....that tells me it's more likely a software side problem (firmware, drivers, main controller) rather than physical imaging parts (drums, developers etc).
I would re-seat all connectors on the main and dc controllers, update firmware, and try new print drivers. -
Re: canon color banding
Sorry, the pictures are not quite right, the color banding goes edge to edge, no border, that came from me scanning it in to my pc instead of taking a pic of it with my phone . firmware is the newest, switched from PCL to UFRII driver with the same random results.Comment
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Re: canon color banding
Hi
This is well know problem on this model. HP have same problem. This is not a transfer belt problem. I can see that you already reset printer few times. Try to reinstall toner cartridges if that don't help, try to replace them. I see that one on HP Pro 200/300 and 400. In most cause reinstall of cartridges will help.
I know why you have problem. You don't use OEM canon cartridges. There is MKI OPC's which will make this issue faster than OEM. When AM cartridges stop to work you can try with OEM 20-30k pages and then you need to replace part where cartridges OPC will seat. That is worn-out. As you are technician, try to clean OPC gear seats from dirt and grease. That will give you more pages to print. This is my thinking. some people think different but they can be right.. so......
I copy Eliot post:
This is a common issue as said and can be due to several factors. The one most common factor is that the OPC has a worn coating and losing charge this creates electrical drop and charge issues and resolves in the colourbanding or what some see as the "German flag defect". Take a close look at each cartridge and check to see if the organic coating on the OPC is worn down to the aluminum substrate. this can happen as the waste toner is building up in the cartridge westering and being held there creating wear and rubbing to the OPC coating.by changing one cartridge with worn drum this stops the issue and prints ok.the other issue is to address what the end user is printing and % per page of coverage and yields. Run and print a supplies status page to see how many prints each unit has printed. One unit may be printing excessive pages past the OEM rated yield do to % of coverage.as said by changing one unit the issue goes. Elliot.
More information here:
https://www.copytechnet.com/forums/hp/83150-color-bands-hp-lj-color-m451dn.html
And
CP 2025 Multi color Banding...1/2" x 8" Bar
As Canon is same as HP, please read this as well
Colored bars across paper with M251nw - HP Support Community - 5699268Comment
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Re: canon color banding
Thanks you so much for the info and links, greatly appreciated. yes, they do use non OEM. gonna try some things and see if it helps. Ill post results. thanks again to everyone.Comment
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Re: canon color banding
If they like to use AM cartridges, then they need to pick cartridges with FUJI OPC's. They are ok.. they are light green-yellow color.Comment
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