Schematic diagram in PDF form for the Wistron LS40 design, LS40IC variant, board number 18777-1, stored in a 3.10 MB RAR archive. Wistron uses this five-digit dash-suffixed board numbering on the laptops it manufactures for other brands. The circuit pages help trace power rails, follow the power-on sequence, identify the charger and PWM controllers and understand signal paths when diagnosing no-power or no-boot faults. It pairs well with the matching 18777-1 boardview for physically locating the parts drawn in the schematic.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 21 Aug 2024 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 31 Dec 2024 | Open file on RM Schematics |
| @cyberlanelectonik | 23 Jul 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.