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Clean the groove of the development unit.
Lay down a sheet of newspaper or other paper beforehand.
Pull the development unit out.
Using a dry cloth, clean off the toner stains at the part [A] below the development roller. Be careful not to touch the development roller [B] or the development roller entrance seal [C].
Using a dry cloth, wipe in the longitudinal direction and and sweep the toner out of the development case groove [B].
Using a dry cloth, clean off the toner stains around the development unit.
