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you must have remove the white mylar sheet from the catridge when
loading it...if yes! you got to find back the white mylar (plastic
sheet) that slot in between the drum and charger roller placed it back (
the position must be accurate) then slot in back the catridge.The white
mylar sheet is to reset the drum life counter
if you have changed the drum/toner unit then the machine should have a fuse on top of the drum unit.I have come across some cartridges that don't have them on the unit.The fuse resets the fax so that it knows there is a new unit installed.If that does work then clear the machines memory using the control panel
The drum is the part of the unit that actually does the transfer of the toner onto the paper. Each toner cartridge does about 2,000 pages and the drum needs to be replaced with the ~6th toner cartridge change (varies with use). Order part DR-250 from Brother or any office supply place that would carry the part.
To replace (wait until print quality decreases or it reads change drum now and stops working). Turn off the unit and let it cool. Close the document tray and the extension and open the top cover. Remove the drum carefully and place it where the toner will not spill. Remove the toner cartridge (if it is still good) and set it aside to put in the new drum. Wrap the old cartridge up and dispose of properly (not in the domestic trash). Keep the new drum out of the light (keep it sealed until needed) as much as possible. Insert the toner cartridge in the new drum. Then insert the unit into the Fax machine. (Hold by the handles) Close the top cover and the starter sheet should be ejected by the machine.
Sounds like a paper clip (or similar) has fallen into the machine and is next to the drum.
Remove the drum unit and see if anything is in the machine or on the drum unit.
Replace the drum if it is close to the end of its life.
The "drum" referred to is the imaging drum which is replaced separately from the toner cartridge. The drum life is rated for a certain number of copies, and the printer is telling you it's time. Replacement drums are available at big-box office places and from many online sources. Just do a Google search for "kx-fl511 drum". The new drum just slides in much like the toner cartridge, so replacing it isn't difficult.
Make sure that you are not using generic supplies. Using generic supplies or supplies that have been refilled will cause the unit to give false errors. There is white piece of plastic inside the semi circular opening, if you do not see a white semi circular opening it is either a generic toner or starter toner and you will need to replace the toner with a authentic toner.
You may try this also:
1. Remove the drum and toner, separate the drum and toner and then rock the toner from side to side.
2 Put the drum and toner back together and clean the corona wire ten times.
3 Put the drum and toner back inside the machine and close the cover, if you still have toner life end try this:
a Open the front cover
b press the options key, the LCD will say "replace drum?"
c press the start key. and then press 10 on your dial pad. the display should say accepted for about 2 seconds and then say cover open.
d close the cover, if the display still has toner life end, you will need to replace the toner