Circuit diagram for the Lenovo ThinkPad Edge E550, built on LCFC motherboard NM-A221 at revision 1.0, in PDF format at about 1.6 MB. The trailing tag in the name points to the source that shared the file and does not change the content. Use the schematic to follow power-on sequencing, check regulator outputs and charger behaviour, and identify what feeds a shorted rail. NM-A numbers follow the LCFC scheme for Lenovo notebooks. Confirm that the PCB marking and revision match before replacing parts by value.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @alischematics. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 5 May 2025 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 2026 | Open file on RM Schematics |
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