NM-B561 – Lenovo ThinkPad P52
The Lenovo ThinkPad P52 is built on the NM-B561 board designed by LCFC. 5 files are indexed for this board: 2 BIOS files, 1 schematic and 2 boardviews.
File names mention revision 1.0. The BIOS dumps are 32 MB images. ODM project name: EP520. The earliest file dates from April 2021 (Cyberlan Electronics, BIOS Archive and Schematics & Boardviews Archive).
BIOS dumps 2
Schematics 1
Boardviews 2
Board facts
| Board number | NM-B561 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | EP520 |
| Revisions | 1.0 |
| BIOS chip size | 32 MB |
| First seen | 2021-04-22 |
| Source channels | Cyberlan Electronics, BIOS Archive, Schematics & Boardviews 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. |
Laptops that use NM-B561
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 |
|---|---|---|
| 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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
What BIOS chip size does NM-B561 use?
The BIOS images for NM-B561 are 32 MB.
Who designed the NM-B561 board?
NM-B561 is an LCFC board number used by Lenovo.
Is there a boardview for NM-B561?
Yes, 2 boardview files in .tvw format.
Which laptops use the NM-B561 board?
Files in the catalog link NM-B561 to the Lenovo ThinkPad P52.
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.