How do I get to the lamp to change it

http://esupport.sony.com/US/perl/model-documents.pl?mdl=KDS50A2020&LOC=3
are the operation instructions incase you lost or misplaced your owners manual. here are the entire operation instructionds including the lamp chanbe directions and where to get a direct replacement lamp. but i would first look at the several lamp suppliers that are listed here on this web-site, good luck
Larry Dillon
AKA techman