Schematic PDF of 674 KB whose name refers to Ziroshi, possibly with version 12-6 and the model code Bp7000. The name gives little more than that, so the exact device type and scope of the drawing should be checked by opening it. Circuit diagrams like this are used to follow power rails and signal paths, identify component values and locate the parts to measure when tracking down a fault. Make sure the board markings on the unit you are repairing match the document before relying on part values.
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.