Main Board 75502J010006 LSC550FN11-401 for Vizio D55-F2 LWZQWXKV LWZQWXKU. Part Type: Main Board. Part Usage: TV LED/LCD. MFR Part Number: 75502J010006. Board Number(s): LSC550FN11-401. Notes Comments & Additional Information: We recommends ordering by part number whenever possible. Often times there are TV models that use more than one set of parts and/or panels. Important Message: Part number can be found on a sticker. TV Part Types: Main Board.