这里有说明书下载(PDF格式的)
http://www.samsung.com/cn/support/download/supportDownDetail.do?group=printersmultifunction&type=printersmultifunction&subtype=monochromelasermultifunctionprintersfaxes&model_nm=SCX-4521F&mType=UM&dType=D&vType=R&cttID=518272&prd_ia_cd=