NM-C881 – Lenovo ThinkPad Carbon X1
The Lenovo ThinkPad Carbon X1, Lenovo ThinkPad X1 Carbon, Lenovo ThinkPad X1 Carbon Gen 8 and Lenovo Yoga Gen 5 are built on the NM-C881 board designed by LCFC. 7 files are indexed for this board: 5 BIOS files, 1 schematic and 1 EC firmware image.
File names mention revision 1.0. The BIOS dumps are 1 MB and 32 MB images. ODM project name: GYG50. First posted in November 2021 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 5
Schematics 1
EC / KBC firmware 1
From the uploader
LENOVO X1 YOGA GEN 5 NM-C881 V 1 OK TESTED EEPROM_EC_MEC1663_0x02202445_2KB_CRC32_0x4DA335C8_MEC_Patched
Board facts
| Board number | NM-C881 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| ODM project | GYG50 |
| Revisions | 1.0 |
| BIOS chip size | 1 MB, 32 MB |
| EC / KBC chip | MEC1663 |
| First seen | 2021-11-08 |
| 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-C881
- Lenovo ThinkPad Carbon X1
- Lenovo ThinkPad X1 Carbon
- Lenovo ThinkPad X1 Carbon Gen 8
- Lenovo Yoga Gen 5
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.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the NM-C881 board?
Files in the catalog link NM-C881 to the Lenovo ThinkPad Carbon X1, Lenovo ThinkPad X1 Carbon, Lenovo ThinkPad X1 Carbon Gen 8 and Lenovo Yoga Gen 5.
Who designed the NM-C881 board?
NM-C881 is an LCFC board number used by Lenovo.
Is there a boardview for NM-C881?
No boardview has been indexed for NM-C881 yet; the schematic is available on this page.
What BIOS chip size does NM-C881 use?
The BIOS images for NM-C881 are 1 MB and 32 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.