Circuit diagram of the Quanta ZHNB laptop motherboard in PDF format, 2.60 MB. No revision, board number or end-brand model appears in the name, so the only identifier is the ZHNB project code that Quanta uses for its designs. Technicians open it in any PDF viewer to follow power rails from the charger input through the battery charger and voltage regulators, check signal paths between chipset, EC and connectors, and look up part values when replacing burnt components. Verify the code and revision printed on the board before trusting component 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 @pepeelectronica. 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.