Konica minolta c550 is showing yellow lines like stains while printing. sometimes the stains look like a background in a document. what am i suppose to do?

replace the the yellow image unit.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

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Aug 22, 2008 - Am working on a Magicolor 2300 DL that sometimes fails to lift the paper tray ... good afternoon I have a konica minolta bizhub c550 when I open the ... I'm no printer tech, but in most other lasers (HPs, etc) the paper tray lifts, .... It seemsthere is a "waste toner sensor" which only lets the printer print out a few ...

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Sir/Mam, have you replaced the yellow image unit ? Not the yellow toner cartridge. There two seperate units. Also there are on each image unit blue/white nubs that you can pull out and push back in to clean interal image unit parts do that you do not have to pull the image units out just ensure that when done cleaning they are pushed all the way back in. Once the image units are not toner cartridge and there are four of them located below each toner cartridge .

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Id start with a transfer roller, A00JR71500. Could also be your black drum.

P6 : cyan image unit problem. P21 come after P6, and it's also too a cyan unit image problem. replace the cyan image unit.

replace the black image unit and clean sensors under the transfer belt

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

try to repl. transfer belt then clean all contact of transfer belt

replace the yellow imaging unit.

replace the magenta image unit

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f