Samsung S6810 troubleshooting manual supplied as a PDF of 1.45 MB. Guides of this type list typical failures like dead phone, charging faults, missing display or backlight, speaker and microphone problems and network loss, then show the circuit area, components and measurement points involved. They are meant to shorten diagnosis before resorting to the full schematic. Open it in a standard PDF viewer and verify the board revision silkscreened on the PCB so the reference positions you measure match the pictures in the document.
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 @Schematics_Mobile. Enginerys does not host this file.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.