NM-C181 – Lenovo ThinkPad T495S
NM-C181 is the LCFC main board used in the Lenovo ThinkPad T495S and Lenovo ThinkPad X395. ChambersDesignInc.com has indexed 5 files for this board — 3 BIOS files, 1 schematic, 1 boardview and 1 EC firmware image.
File names mention revision 1.0. BIOS images are 1 MB and 16 MB. ODM project names: FA391 and FA491. First posted in April 2021 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 3
Schematics 1
Boardviews 1
From the uploader
FA391 FA491 NM-C181 REV 1.0 2019-03-21 16MB &1MB & KBEC ( UNLOCK IO ITE_818641_192KB) AMD RYZEN 5 PRO 3500U BIOS
Board facts
| Board number | NM-C181 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| ODM project | FA391, FA491 |
| Revisions | 1.0 |
| BIOS chip size | 1 MB, 16 MB |
| First seen | 2021-04-04 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics |
| 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-C181
- Lenovo ThinkPad T495S
- Lenovo ThinkPad X395
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 |
|---|---|---|
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .tvw | Tebo-ICT .tvw boardview | FlexBV or Tebo-ICT View |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-C181 board?
NM-C181 is an LCFC board number used by Lenovo.
Is there a boardview for NM-C181?
Yes, 1 boardview file in .bdv and .tvw format.
Which laptops use the NM-C181 board?
Files in the catalog link NM-C181 to the Lenovo ThinkPad T495S and Lenovo ThinkPad X395.
What BIOS chip size does NM-C181 use?
The BIOS images for NM-C181 are 1 MB and 16 MB.
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.