Repair kyocera fs-1028 mfp machine failure call service c7990

empty drum unit its full of waste toner each side of drum unit has plastic covers that pop off empty out the unit thoroughly and vacuum inside

in the drum unit assy. replace drum unit.

Drum waste chamber needs emptying or drum unit replaced.

its a waste toner error put a new one in if the error persist check all the sensors you may also have to replace the drum

Make sure that the front and top covers close smoothly and fully. If the blue toner release arm is not fully to the rear the top cover will barely close. To reset the process unit you should remove it and then re-install it making sure it makes a good 'click' when you insert it.

The waste toner container is located inside the drum unit.This code means the drum unit is full. To empty there are two caps that can be opened and the waste toner can be emptied. Usually the waste gets full when the unit is very close to be replaced. You may be able to get some more time if you empty it, but you will probably need to replace the unit soon.

What to do if the current display is "Machine Failure Call Service C7990" but few days ago it displays "Toner Waste Box is Full".?

printer is working but scanner is not working

Have you tried just setting it up as an HP? Kyocera machines emulate HP.