Sony MBX-223 motherboard schematic, marked with the M960 and M970 project codes, an L model variant and revision SA. The 843 KB PDF is used to trace power rails, check the power-on sequence and identify components on a circuit that measures shorted or open. Because the document covers a specific variant, make sure the board in hand is the L model and carries the same revision before taking part values or pinouts from it. Any PDF reader with text search works well for locating net names.
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.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.