NM-E331 – Lenovo IdeaPad 15IAU7 JS47
The Lenovo IdeaPad 15IAU7 JS47 and Lenovo IdeaPad JS76 are built on the NM-E331 board designed by LCFC. The catalog lists 4 files for it: 2 BIOS files, 1 schematic and 1 boardview.
Revisions seen in file names: 1.0. The earliest file dates from February 2024 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 2
Schematics 1
Boardviews 1
Board facts
| Board number | NM-E331 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-E |
| Revisions | 1.0 |
| First seen | 2024-02-27 |
| 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-E331
- Lenovo IdeaPad 15IAU7 JS47
- Lenovo IdeaPad JS76
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-E331 board?
NM-E331 is an LCFC board number used by Lenovo.
Which laptops use the NM-E331 board?
Files in the catalog link NM-E331 to the Lenovo IdeaPad 15IAU7 JS47 and Lenovo IdeaPad JS76.
Is there a boardview for NM-E331?
Yes, 1 boardview file in .bdv and .tvw format.
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.