Schematic for the HS450 project on Lenovo board NM-D231, packed as a PDF in a 2.96 MB RAR archive. LCFC, Lenovo's own design and manufacturing arm, uses the NM-xxxx board numbering seen here. With no revision in the name, confirm the PCB markings before trusting values. The diagram lets a technician follow the power-on sequence, read rail names and enable signals, look up part values and pair it with the matching boardview to move from a circuit fault to the physical component on the board.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 7 May 2024 | Open file on RM Schematics |
| @cyberlanelectonik | 16 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.