A 553 KB PDF schematic for the Samsung BN44-00509B power supply board, revision B. Samsung uses the BN44 prefix for its TV power units, and the revision letter should match the label on the board. The drawing helps when tracing the mains input, PFC circuit, standby converter and output rails, finding test points and checking for shorted switching parts. Open it with any PDF viewer and compare it to the closely related 00508B board, which shares the same file size.
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 @gunvantrathore. 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.