NM-A321
NM-A321 is an LCFC Lenovo main board number. ChambersDesignInc.com has indexed 5 files for this board — 2 BIOS files, 1 schematic and 2 boardviews.
Revisions seen in file names: 1.0. The BIOS dumps are 8 MB images. ODM project names: YOGA3 and AIUU2. First posted in August 2018 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 2
Schematics 1
Boardviews 2
From the uploader
Lenovo Yoga3 Pro 1370 AIUU2 NM-A321 REV 1.0
BIOS Lenovo YOGA 3 Pro-1370 80HE NM-A321 AIUU2 Rev:1.0
Board facts
| Board number | NM-A321 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | YOGA3, AIUU2 |
| Revisions | 1.0 |
| BIOS chip size | 8 MB |
| Flash chip | W25Q64 |
| First seen | 2018-08-26 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive, Boardview Schematics |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
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 |
|---|---|---|
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| 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 |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
Questions
Who designed the NM-A321 board?
NM-A321 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A321?
Yes, 2 boardview files in .tvw format.
What BIOS chip size does NM-A321 use?
The BIOS images for NM-A321 are 8 MB. Flash chips named in the files: W25Q64.
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.