SCH

NM-A221_r1.0_Lenovo_ThinkPad_Edge_E550_LCFC.pdf

Schematic for Lenovo E550 · board NM-A221 · 1.6 MB · shared in 5 Telegram posts.

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TXTAbout NM-A221 r1.0 Lenovo ThinkPad Edge E550 LCFC schematic

NM-A221 r1.0 Lenovo ThinkPad Edge E550 LCFC is a free Lenovo E550 motherboard schematic diagram for board NM-A221. The PDF file is 1.6 MB and covers board revision 1.0. It was first posted on 13 Sept 2021 and is available in 5 Telegram channels.

The NM-A221 schematic shows the complete circuit of the motherboard: the always-on 3VALW / 5VALW rails, the battery charger, CPU core and memory power, USB, display, audio and the BIOS/EC section. Use it to trace no-power, no-display, short-circuit and not-charging faults on Lenovo boards.

For the same board you can also find BIOS dumps — see all NM-A221 files.

Type
Schematics
Format
.pdf · PDF schematic
Size
1.6 MB
Brand
Lenovo
Board number
NM-A221
Model
E550
Revision
1.0
First posted
13 Sept 2021
Last posted
12 Sept 2025
Sources
5

Tags

NM-A221 schematicNM-A221 schematic diagramLenovo NM-A221Lenovo E550 schematicLenovo E550 motherboardLenovo E550 circuit diagramLenovo schematic pdflaptop schematic diagramLenovo laptop schematic diagramschematic free download

MSGFrom the Telegram post

NM-A221 r1.0 Schematic

J1Download NM-A221 schematic from Telegram

R1How to download NM-A221 r1.0 Lenovo ThinkPad Edge E550 LCFC

  1. Press Download in Telegram. The post opens in the Telegram app, or on a t.me preview page — choose “View in Telegram”.
  2. You don’t need to join the channel. Tap the file NM-A221_r1.0_Lenovo_ThinkPad_Edge_E550_LCFC.pdf to download it.
  3. Open it with Any PDF reader or SumatraPDF.

If a post was deleted, try another source above or search for NM-A221. Step-by-step help: downloading from Telegram.

.PDFWhat is a .pdf file and how to open it?

PDF schematic. A circuit diagram of the motherboard, page by page.

Open with:

  • Any PDF reader
  • SumatraPDF
  • Your web browser

Tip: Press Ctrl+F and search for a part (PU1, PQ3) or a net name (+3VALW, PWR_EN) to jump straight to it.