Schematic in PDF for board NM-A331, a Compal-style number listed under the Lenovo brand; NM- prefixes are used by LCFC and Compal for Lenovo notebook boards. The specific laptop model is not named in the file title. The diagram helps trace power rails, the charger and EC circuit, and power-on sequence signals when a notebook will not start. Check that NM-A331 is printed on the PCB before using it, and note that component values may vary between board revisions.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 31 Jul 2024 | 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.