Samsung troubleshooting guide for the S7262 handset, supplied as a 1.65 MB PDF; Tshoo is the abbreviation Samsung service documents use for troubleshooting. Guides of this kind walk through common faults such as no power, no charging, no display, no sound or no network, pairing each symptom with flowcharts, board images and the components or test points to measure. Open it in any PDF reader and confirm the model and board revision on the phone before following the checks, since regional variants can differ in layout.
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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.