RAR archive for the Sony VAIO VPCEB15 laptop, identifying its motherboard as MBX-223. No revision or ODM code is given in the name. The archive is 1.03 MB, consistent with a schematic PDF. With it, a technician can trace the path from the adapter input through the charger to the system rails, check the EC and power button signals, and find the parts surrounding a shorted rail. VPC-EB machines came in several variants, so make sure the PCB shows MBX-223 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 @generalschematics. 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.