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Kyocera Mita Kyocera FS-1028 MFP Laser Print Questions & Answers
How to reset a process unit
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.
ERREUR MACHINE CODE C7990
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.
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