NM-C621 – Lenovo ThinkCentre M70Q
NM-C621 is the LCFC main board used in the Lenovo ThinkCentre M70Q. ChambersDesignInc.com has indexed 5 files for this board — 2 BIOS files, 2 schematics and 2 boardviews.
File names mention revision 1.0. ODM project name: GH470. First posted in February 2022 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 2
Schematics 2
Boardviews 1
From the uploader
LENOVO THINKCENTER M70Q GH470 NM-C621 REV 1.0 2020-09-28 IQ4X0IL1 2MB &8MB &16MB
Board facts
| Board number | NM-C621 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| ODM project | GH470 |
| Revisions | 1.0 |
| First seen | 2022-02-10 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| 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-C621
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
Which laptops use the NM-C621 board?
Files in the catalog link NM-C621 to the Lenovo ThinkCentre M70Q.
Who designed the NM-C621 board?
NM-C621 is an LCFC board number used by Lenovo.
Is there a boardview for NM-C621?
Yes, 2 boardview files 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.