Small PDF of 342 KB filed under schematics, but its name refers to a Tokopedia invoice and gives no device model, brand or board number. Nothing in the title suggests it contains circuit diagrams, so it is likely a mislabelled document rather than repair data. A genuine schematic PDF would show power rails, signal nets and component values for tracing faults. Open it and check the content before relying on it for any repair, and look for a properly named schematic matching the board number printed on your PCB.
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 @bios_main_ec_kbc. 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.