Hi all. I have a 905 that int leaves a grey band about 5 inches wide on back of copies every 15 sheets or so. The dev has only 150K on it and the drum about the same. I cleaned the drum area and coronas of excess toner as I was getting SC 300 errors as well as SC 586 at the same time as the SC300 (copy count same). Any ideas? Anyone know what the Ricoh equivalent is?