nut_chanok@yahoo.com
http://www.samsung.com/th/support/download/supportDown.do?group=pcperipheralsprinter&type=printermultifunction&subtype=monolaserprinter&model_nm=ML-1640&disp_nm=ML-1640&language=&cate_type=all&dType=D&mType=DR&vType=&prd_ia_cd=06010400&model_cd=&menu=download