I HAVE A 560 THAT I REFILLED THE TONER .IT IS PRINTING VERY LIGHT. i HAVE GONE IN AND AJUSTED TO +10 AND IT DOESNT CHANGE. THIS UNIT CAME TO ME COVERED IN TONER. SO I HAVE BEEN CLEANING IT EVERY TIME I OPEN IT. IT HAD 59% BLACK TONER BEFORE I TOPPED IT OFF. AND BLACK IS ALSO FADED.ALL OTHER CONSUMABLES HAD PLENTY OF LIFE LEFT IN THEM.