Archive for the Dell Latitude E5550 built on Compal board LA-A911P, revision 1.0, with the Compal project code ZAM80. At 3.64 MB it most likely contains a schematic for following power rails, checking voltage sequencing and identifying components around a fault. Dell sources this board from Compal, which uses the LA-xxxxP numbering pattern. Before using it, compare the board number and revision printed on your PCB, as later revisions of the same design may differ in components or values.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @SCHEMATICWORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.