Schematic in PDF form for a board identified as M300B MAIN PCB, supplied inside a 1.44 MB RAR archive. The name gives no laptop brand or revision, only the main PCB designation. A technician opens the PDF in any reader to follow power rails, trace signals between the charger, CPU and memory sections, and find component references when hunting a short or missing voltage. Compare the silkscreen marking on the actual board with the drawing title block before trusting part values, since similar boards may differ between versions.
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.
All sources (8)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 6 Jul 2021 | Open file on RM Schematics |
| @LaptopsBoardview | 17 Aug 2021 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @cyberlanelectonik | 19 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.