Short 217 KB PDF schematic labelled ITV.V59.031.13. The code looks like a board or document identifier from a TV main board family, possibly linked to the V59 series boards seen elsewhere in this index, but the name states no brand or model. Open it to confirm which board it shows. Technicians use compact schematics like this to check supply rails, connector pinouts and key component values. Match the code printed on the PCB exactly to ITV.V59.031.13 before following any measurements.
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 @datasheets1. 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.