Schematic package for the Lenovo ThinkPad E480 and E580, built on the LCFC NM-B421 motherboard, supplied as a RAR archive of about 10.9 MB holding the PDF diagram. LCFC is the Lenovo-owned ODM whose boards carry NM-xxxx numbers. Technicians use these pages to follow power rails from the charger input through the sequencing stages, read net names and find which controller drives a dead rail. Before tracing, confirm that NM-B421 and its revision are printed on the PCB, since revisions can differ in parts and nets.
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 @Satale_bios_esquemas_Laptop. 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 | |
|---|---|---|
| @Satale_bios_esquemas_Laptop | 23 Feb 2026 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 20 Oct 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.