NM-A091 – Lenovo ThinkPad X250
The Lenovo ThinkPad X250, Lenovo ThinkPad X240 and Lenovo ThinkPad X250 16 are built on the NM-A091 board designed by LCFC. The catalog lists 27 files for it: 22 BIOS files, 2 schematics, 2 boardviews and 2 EC firmware images.
Revisions seen in file names: 1.0. BIOS images are 16 MB. ODM project name: VIUX1. First posted in August 2017 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 22
Schematics 2
Boardviews 2
EC / KBC firmware 1
From the uploader
Lenovo Thinkpad X250 VIUX1 NM-A091 REV : 1.0 2013-04-17
SMSC MEC1633L-AUE
WINBOND W25Q128FV (U49)
Model: Lenovo Thinkpad X250
Mainboard: VIUX1 NM-A091 Rev1.0 2013-04-17
CPU: 5th Generation
Bios Version: N10ET63W (1.42)
EC Version: N10HT17W (1.16)
Board facts
| Board number | NM-A091 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | VIUX1 |
| Revisions | 1.0 |
| BIOS chip size | 16 MB |
| Flash chip | W25Q128BV, W25Q128FV |
| EC / KBC chip | MEC1633 |
| CPU generation | Intel 5th gen |
| First seen | 2017-08-26 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Files |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
Laptops that use NM-A091
- Lenovo ThinkPad X250
- Lenovo ThinkPad X240
- Lenovo ThinkPad X250 16
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-A091 board?
NM-A091 is an LCFC board number used by Lenovo.
Which laptops use the NM-A091 board?
Files in the catalog link NM-A091 to the Lenovo ThinkPad X250, Lenovo ThinkPad X240 and Lenovo ThinkPad X250 16.
Is there a boardview for NM-A091?
Yes, 2 boardview files.
What BIOS chip size does NM-A091 use?
The BIOS images for NM-A091 are 16 MB. Flash chips named in the files: W25Q128BV and W25Q128FV.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.