PDF circuit diagram for the W3V-A, 1.55 MB. The name gives only the model designation, so confirm the revision from the schematic's title block. The drawings are useful for tracing charger and regulator circuits, finding where a rail is shorted, and reading values for passive components and connector pinouts. Open it in any PDF viewer and use the search function for net names. Check that the board label on the PCB matches the document before using it during repair.
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 @cyberlanelectonik. 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.