Question about OKI C5100n Laser Printer

2 Answers

Problems printing black

My C5100n will print all colors on a page except black. I initially encountered the problem last week, although the problem then was that the black ink was not setting. Color images looked good, but the black was smeared. I replace the black toner cartridge, and my problem was solved for a couple of days. Now, no black will print at all. This occurs for both text and graphics.

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  • hicksinfo Jun 30, 2008

    I'm having the same problem except I've changed both the toner cartridge and drum and still not printing black. You say to clean the leeds ... um .... not to sound dumb but where in the world is that? Is that the connection areas on the drum? Did that. I gently cleaned the "bar" that hangs down from the lid when you open it. Still not printing black. Adjusted the registration a couple of times. Still not printing black. All other colors printing including the Cyan that says is out.

  • Fstara Sep 04, 2008

    I'm having a problem with my black ink as well. It prints out but is faded. I changed the toner and the drum is still good. All other colors print out fine. Any suggestions?

  • wclausen Sep 07, 2008

    C5150 Does not print black.



2 Answers

This may not be a solution, but certainly a troubleshooting trick. Move one of the color drums to the black area, and the black drum to the color one you just moved. If the problem follows the drum, the drum is defective - if the problem stays with the black "area" then you have a probem related to the electronics of the printer. Clean all contacts and test again.

Posted on Sep 25, 2008

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How many prints have u done with the drum, black.???, if it´s new, just clean the leeds of the black, with a piece of cloth.

Posted on Jan 17, 2007


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1 Answer

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it´s pretty strange but if u replaced both toner and drum, the printer doesn´t give any error u may have the high voltage board damaged, and u can't do much, u must contact a local dealer

Jun 30, 2008 | OKI C5100n Laser Printer

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What is the stats % of drums if low under 50% change them, soon as you add non Gen you throw a spanner in any attempt to fault find, fix is possible toner more than likely drum/drums, do a print of each colour and change drums as indicated by failure in its colour to print, check transport belt is OK and led heads are clean

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I need to know if the test page that the unit prints as "Demo Page" comes out fine. If this is the case, your problem is within your application (software) or computer connection (check all cables). If this is NOT the case, I'll need to know more about your scenario. Operating system, type of connection (USB, parallel) and what are you trying to print. I'll be waiting.

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