Samsung R55 laptop schematic in PDF form, built on the board code-named FIRENZE-R at revision 1.0. Samsung service schematics typically carry these project code names, which help match the drawing to the right mainboard. The 1.47 MB document is suited to tracing power rails, checking the standby and main power sequence, and finding the parts around a failed circuit. Open it in any PDF viewer, and verify the code name and revision silkscreened on the PCB match revision 1.0 before trusting component 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 @smschematics. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.