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Re: Black line on print-outs
When u found any extra black or white vertical line, we can check 3 possibility: 1) check the toner container. U may have to replace a new 1 if necessary. 2) clean the charger wire. Just slide the Charger Cleaner (green color) backward and forward 3-4 times to clean the charger wire, then return to its original position. 3) check the charger cleaner is it in its original position or not?
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If the lines go all the way down the page, check the position of the corona wire cleaner tab (blue or green) at the top front of the drum unit. if not parked fully to one side it will create a solid black lines where it blocks the laser. Otherwise look for some other foreign object (or torn paper piece) that may be blocking the laser from the drum. If the lines are thin and shark, check for scratches on the drum (not repairable without replacing drum). If the lines are uneven thickness but in a pattern that repeats down the page every few inches, then the film on the drum is probably worn or wearing away and the drum needs to be replaced.
Needs Drum If you pull the drum unit out you will see on the drum different shades of color lighter is wear the lines come from. Buy a rebuilt drum much cheaper and they work, may have to reset the drum count if the change drum lite on...
Run a half test. Put paper in the manual feed tray. Print something, anything When the paper is 1/2 way into the printer, open the cover. Pull out the toner cartridge. Look down at the paper. Does it have a black line on the right side? If yes, replace the cartridge. If no, replace the fuser.
Try cleaning the charge wire. Move the lime green plastic handle from one side of the image unit to the other in the groove. If this doesn't work you'll need a new image unit.$$$$$. note: Make sure green handle is moved completely to the right when finished or black line will occur.
You have the classic single nozzle failure it appears. You say you have done a nozzle check. This should reveal that one of the black nozzles is not working i.e. there is a single gap in your nozzle check printout for the black nozzles. Now, this may be due to a blocked nozzle. Try the following print head soak process.
Turn the printer on, and as soon as the print head moves pull the power cord out of the back, or turn the printer off at the mains. You may now carefully move the print head by hand over to the left hand side out of the way. Look inside the print head parking area on the right and you will see a small rubber cup that comes up to cover the print nozzles when the head is parked (to stop it drying out). Use a syringe or dropper to fill this cup with head cleaning fluid or distilled water. DO NOT USE TAP WATER. Carefully push the print head fully into its parking position so that the cup full of fluid comes up over the print head. Leave this for at least 24 hours, then try a head clean again. If still nothing, report back
This is that the black drum unit cleaning blade failed or the charge roller has toner stuck on it. To remove the drum open the front cover and using the green tool right hand side of opened door undo the two screws turn the transfer lock into the unlock position and lift. Once you have done this then remove the black drum this is the one at the top by moving the little green tag to one side and pulling out (Be Careful as if you scratch the drum you will have other problems)
Once remove you will be able to see the drum and a black roller above it see if that has the black line on it. If it has then clean with some alcohol based cleaning fluid once this is done reinstall and then print. If there is no line on the black roller try above the likely thing is that the drum cleaning blade has worn and the unit will need replacing.