Schematic in PDF form, labelled only H46Y, compressed into a 1.43 MB RAR file. The name does not state the brand, model or board number, so confirm the target device from the title page before use. A schematic like this lets you follow the power-on sequence, verify rail voltages, identify the EC and BIOS chip, and trace signals between components. A matching H46Y boardview may help with locating parts physically. Check the revision on the board against the document.
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 @schematicslaptop. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.