Lenovo ThinkPad T420 schematic for the NZ3 project in its UMA configuration, meaning integrated graphics without a discrete GPU. No board number or revision is stated in the name, so check the document title pages against the label on your mainboard and make sure your unit is the UMA version. The 1.69 MB PDF is useful for tracing charger and system rails, following power sequencing, locating the embedded controller and BIOS chip and finding components connected to a shorted net.
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 |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.