Schematic in PDF format for a TV mainboard identified as TP.MT5522S.PC822, about 1.5 MB. The TP.xxx.PCxxx naming is typical of universal LCD TV controller boards, and MT5522 refers to the MediaTek SoC it is built around. Technicians use these diagrams to check the standby and main power rails, panel LVDS output, backlight enable and tuner circuits when a set will not start or shows no picture. Verify that the code printed on your board matches exactly before relying on it.
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 @pdf_servicemanual. 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.