Compressed copy of the Lenovo FX490 schematic for motherboard NM-B861 revision 1.0, packed as a 5 MB RAR archive. NM-series codes come from LCFC, Lenovo's own ODM, so the matching number and revision should be printed on the board itself. After extracting with 7-Zip or WinRAR, the PDF can be used to follow rail generation, trace EC and power button signals, find fuses and check MOSFETs around a suspected short. It is useful when diagnosing no-power, no-charge or no-boot faults on this platform.
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 | 27 Jan 2026 | Open file on RM Schematics |
| @cyberlanelectonik | 15 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 27 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.