NM-A221 – Lenovo ThinkPad E550
The Lenovo ThinkPad E550, Lenovo ThinkPad E550C and Lenovo ThinkPad Edge E550 are built on the NM-A221 board designed by LCFC. ChambersDesignInc.com has indexed 14 files for this board — 9 BIOS files, 4 schematics and 2 EC firmware images.
File names mention revision 1.0. ODM project name: AITE1. First posted in October 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 9
Schematics 4
EC / KBC firmware 1
From the uploader
LENOVO THINKPAD E550 AITE1 NM-A221 REV 1.0 2014-09-12 i3-4005U WORKING BIOS & KBEC 100%
LENOVO THINKPAD E550 AITE1 NM-A221 REV 1.0 2014-09-12 i5-5200U WORKING BIOS & KBEC 100%
LENOVO THINKPAD E550 AITE1 NM-A221 REV 1.0 2014-09-12 i7-5500U WORKING BIOS & KBEC 100%
Board facts
| Board number | NM-A221 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | AITE1 |
| Revisions | 1.0 |
| EC / KBC chip | IT8586E |
| CPU generation | Intel 4th gen, Intel 5th gen |
| First seen | 2019-10-01 |
| 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-A221
- Lenovo ThinkPad E550
- Lenovo ThinkPad E550C
- Lenovo ThinkPad Edge E550
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 |
| .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
Who designed the NM-A221 board?
NM-A221 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A221?
No boardview has been indexed for NM-A221 yet; the schematic is available on this page.
Which laptops use the NM-A221 board?
Files in the catalog link NM-A221 to the Lenovo ThinkPad E550, Lenovo ThinkPad E550C and Lenovo ThinkPad Edge E550.
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.